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      What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
      \n
      Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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      \n
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      \n
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      What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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      Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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      Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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      The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
      \n
      Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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      Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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      \n
      Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
      \n
      The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
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        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#3989 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#3992 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#3984 …}
    +entries: Doctrine\ORM\PersistentCollection {#3982 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#3980 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#3977 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#3975 …}
    +posts: Doctrine\ORM\PersistentCollection {#3972 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#3970 …}
    +postComments: Doctrine\ORM\PersistentCollection {#3968 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#3965 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#3963 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#3961 …}
    +follows: Doctrine\ORM\PersistentCollection {#4104 …}
    +followers: Doctrine\ORM\PersistentCollection {#4100 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4089 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4080 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4069 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4106 …}
    +reports: Doctrine\ORM\PersistentCollection {#4103 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4066 …}
    +violations: Doctrine\ORM\PersistentCollection {#4093 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4096 …}
    +awards: Doctrine\ORM\PersistentCollection {#4094 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4092 …}
    +categories: Doctrine\ORM\PersistentCollection {#4091 …}
    -id: 6725
    -password: "$2y$13$x7NodV8W0FCCTtQJN1BVneXA1/gAAvSTVv/5WRrBpA0.lVv7PVBsu"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4084 …}
    +apId: "Link9454@kbin.social"
    +apProfileId: "https://kbin.social/u/Link9454"
    +apPublicUrl: "https://kbin.social/u/Link9454"
    +apFollowersUrl: "https://kbin.social/u/Link9454/followers"
    +apInboxUrl: "https://kbin.social/f/inbox"
    +apDomain: "kbin.social"
    +apPreferredUsername: "Link9454"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689094864 {#4044
      date: 2023-07-11 19:01:04.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687444139 {#4042
      date: 2023-06-22 16:28:59.0 +02:00
    }
  }
  "showAvatar" => false
]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#4476
  +user: App\Entity\User {#3988
    +avatar: null
    +cover: null
    +email: "Link9454@kbin.social"
    +username: "@Link9454@kbin.social"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689095292 {#4048
      date: 2023-07-11 19:08:12.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#3989 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#3992 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#3984 …}
    +entries: Doctrine\ORM\PersistentCollection {#3982 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#3980 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#3977 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#3975 …}
    +posts: Doctrine\ORM\PersistentCollection {#3972 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#3970 …}
    +postComments: Doctrine\ORM\PersistentCollection {#3968 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#3965 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#3963 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#3961 …}
    +follows: Doctrine\ORM\PersistentCollection {#4104 …}
    +followers: Doctrine\ORM\PersistentCollection {#4100 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4089 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4080 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4069 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4106 …}
    +reports: Doctrine\ORM\PersistentCollection {#4103 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4066 …}
    +violations: Doctrine\ORM\PersistentCollection {#4093 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4096 …}
    +awards: Doctrine\ORM\PersistentCollection {#4094 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4092 …}
    +categories: Doctrine\ORM\PersistentCollection {#4091 …}
    -id: 6725
    -password: "$2y$13$x7NodV8W0FCCTtQJN1BVneXA1/gAAvSTVv/5WRrBpA0.lVv7PVBsu"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4084 …}
    +apId: "Link9454@kbin.social"
    +apProfileId: "https://kbin.social/u/Link9454"
    +apPublicUrl: "https://kbin.social/u/Link9454"
    +apFollowersUrl: "https://kbin.social/u/Link9454/followers"
    +apInboxUrl: "https://kbin.social/f/inbox"
    +apDomain: "kbin.social"
    +apPreferredUsername: "Link9454"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689094864 {#4044
      date: 2023-07-11 19:01:04.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687444139 {#4042
      date: 2023-06-22 16:28:59.0 +02:00
    }
  }
  +showAvatar: false
}
date App\Twig\Components\DateComponent 12.0 MiB 0.14 ms
Input props 
[
  "date" => DateTimeImmutable @1689095288 {#3985
    date: 2023-07-11 19:08:08.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#4531
  +date: DateTimeImmutable @1689095288 {#3985
    date: 2023-07-11 19:08:08.0 +02:00
  }
}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.09 ms
Input props 
[
  "createdAt" => DateTimeImmutable @1689095288 {#3985
    date: 2023-07-11 19:08:08.0 +02:00
  }
  "editedAt" => null
]
Attributes 
[]
Component 
App\Twig\Components\DateEditedComponent {#4585
  +createdAt: DateTimeImmutable @1689095288 {#3985
    date: 2023-07-11 19:08:08.0 +02:00
  }
  +editedAt: null
}
user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.24 ms
Input props 
[
  "user" => App\Entity\User {#3988
    +avatar: null
    +cover: null
    +email: "Link9454@kbin.social"
    +username: "@Link9454@kbin.social"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689095292 {#4048
      date: 2023-07-11 19:08:12.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#3989 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#3992 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#3984 …}
    +entries: Doctrine\ORM\PersistentCollection {#3982 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#3980 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#3977 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#3975 …}
    +posts: Doctrine\ORM\PersistentCollection {#3972 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#3970 …}
    +postComments: Doctrine\ORM\PersistentCollection {#3968 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#3965 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#3963 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#3961 …}
    +follows: Doctrine\ORM\PersistentCollection {#4104 …}
    +followers: Doctrine\ORM\PersistentCollection {#4100 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4089 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4080 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4069 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4106 …}
    +reports: Doctrine\ORM\PersistentCollection {#4103 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4066 …}
    +violations: Doctrine\ORM\PersistentCollection {#4093 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4096 …}
    +awards: Doctrine\ORM\PersistentCollection {#4094 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4092 …}
    +categories: Doctrine\ORM\PersistentCollection {#4091 …}
    -id: 6725
    -password: "$2y$13$x7NodV8W0FCCTtQJN1BVneXA1/gAAvSTVv/5WRrBpA0.lVv7PVBsu"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4084 …}
    +apId: "Link9454@kbin.social"
    +apProfileId: "https://kbin.social/u/Link9454"
    +apPublicUrl: "https://kbin.social/u/Link9454"
    +apFollowersUrl: "https://kbin.social/u/Link9454/followers"
    +apInboxUrl: "https://kbin.social/f/inbox"
    +apDomain: "kbin.social"
    +apPreferredUsername: "Link9454"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689094864 {#4044
      date: 2023-07-11 19:01:04.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687444139 {#4042
      date: 2023-06-22 16:28:59.0 +02:00
    }
  }
  "width" => 40
  "height" => 40
  "asLink" => true
]
Attributes 
[]
Component 
App\Twig\Components\UserAvatarComponent {#4641
  +width: 40
  +height: 40
  +user: App\Entity\User {#3988
    +avatar: null
    +cover: null
    +email: "Link9454@kbin.social"
    +username: "@Link9454@kbin.social"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689095292 {#4048
      date: 2023-07-11 19:08:12.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#3989 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#3992 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#3984 …}
    +entries: Doctrine\ORM\PersistentCollection {#3982 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#3980 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#3977 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#3975 …}
    +posts: Doctrine\ORM\PersistentCollection {#3972 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#3970 …}
    +postComments: Doctrine\ORM\PersistentCollection {#3968 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#3965 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#3963 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#3961 …}
    +follows: Doctrine\ORM\PersistentCollection {#4104 …}
    +followers: Doctrine\ORM\PersistentCollection {#4100 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4089 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4080 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4069 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4106 …}
    +reports: Doctrine\ORM\PersistentCollection {#4103 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4066 …}
    +violations: Doctrine\ORM\PersistentCollection {#4093 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4096 …}
    +awards: Doctrine\ORM\PersistentCollection {#4094 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4092 …}
    +categories: Doctrine\ORM\PersistentCollection {#4091 …}
    -id: 6725
    -password: "$2y$13$x7NodV8W0FCCTtQJN1BVneXA1/gAAvSTVv/5WRrBpA0.lVv7PVBsu"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4084 …}
    +apId: "Link9454@kbin.social"
    +apProfileId: "https://kbin.social/u/Link9454"
    +apPublicUrl: "https://kbin.social/u/Link9454"
    +apFollowersUrl: "https://kbin.social/u/Link9454/followers"
    +apInboxUrl: "https://kbin.social/f/inbox"
    +apDomain: "kbin.social"
    +apPreferredUsername: "Link9454"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689094864 {#4044
      date: 2023-07-11 19:01:04.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687444139 {#4042
      date: 2023-06-22 16:28:59.0 +02:00
    }
  }
  +asLink: true
}
vote App\Twig\Components\VoteComponent 12.0 MiB 0.42 ms
Input props 
[
  "subject" => App\Entity\EntryComment {#4040
    +user: App\Entity\User {#3988
      +avatar: null
      +cover: null
      +email: "Link9454@kbin.social"
      +username: "@Link9454@kbin.social"
      +roles: []
      +followersCount: 0
      +homepage: "front"
      +about: null
      +lastActive: DateTime @1689095292 {#4048
        date: 2023-07-11 19:08:12.0 +02:00
      }
      +markedForDeletionAt: null
      +fields: null
      +oauthGithubId: null
      +oauthGoogleId: null
      +oauthFacebookId: null
      +oauthKeycloakId: null
      +hideAdult: true
      +showSubscribedUsers: true
      +showSubscribedMagazines: true
      +showSubscribedDomains: true
      +preferredLanguages: []
      +featuredMagazines: null
      +showProfileSubscriptions: true
      +showProfileFollowings: true
      +markNewComments: false
      +notifyOnNewEntry: false
      +notifyOnNewEntryReply: false
      +notifyOnNewEntryCommentReply: false
      +notifyOnNewPost: false
      +notifyOnNewPostReply: false
      +notifyOnNewPostCommentReply: false
      +addMentionsEntries: false
      +addMentionsPosts: true
      +isBanned: false
      +isVerified: false
      +isDeleted: false
      +isBot: false
      +spamProtection: true
      +customCss: null
      +ignoreMagazinesCustomCss: false
      +moderatorTokens: Doctrine\ORM\PersistentCollection {#3989 …}
      +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#3992 …}
      +moderatorRequests: Doctrine\ORM\PersistentCollection {#3984 …}
      +entries: Doctrine\ORM\PersistentCollection {#3982 …}
      +entryVotes: Doctrine\ORM\PersistentCollection {#3980 …}
      +entryComments: Doctrine\ORM\PersistentCollection {#3977 …}
      +entryCommentVotes: Doctrine\ORM\PersistentCollection {#3975 …}
      +posts: Doctrine\ORM\PersistentCollection {#3972 …}
      +postVotes: Doctrine\ORM\PersistentCollection {#3970 …}
      +postComments: Doctrine\ORM\PersistentCollection {#3968 …}
      +postCommentVotes: Doctrine\ORM\PersistentCollection {#3965 …}
      +subscriptions: Doctrine\ORM\PersistentCollection {#3963 …}
      +subscribedDomains: Doctrine\ORM\PersistentCollection {#3961 …}
      +follows: Doctrine\ORM\PersistentCollection {#4104 …}
      +followers: Doctrine\ORM\PersistentCollection {#4100 …}
      +blocks: Doctrine\ORM\PersistentCollection {#4089 …}
      +blockers: Doctrine\ORM\PersistentCollection {#4080 …}
      +blockedMagazines: Doctrine\ORM\PersistentCollection {#4069 …}
      +blockedDomains: Doctrine\ORM\PersistentCollection {#4106 …}
      +reports: Doctrine\ORM\PersistentCollection {#4103 …}
      +favourites: Doctrine\ORM\PersistentCollection {#4066 …}
      +violations: Doctrine\ORM\PersistentCollection {#4093 …}
      +notifications: Doctrine\ORM\PersistentCollection {#4096 …}
      +awards: Doctrine\ORM\PersistentCollection {#4094 …}
      +subscribedCategories: Doctrine\ORM\PersistentCollection {#4092 …}
      +categories: Doctrine\ORM\PersistentCollection {#4091 …}
      -id: 6725
      -password: "$2y$13$x7NodV8W0FCCTtQJN1BVneXA1/gAAvSTVv/5WRrBpA0.lVv7PVBsu"
      -totpSecret: null
      -totpBackupCodes: []
      -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4084 …}
      +apId: "Link9454@kbin.social"
      +apProfileId: "https://kbin.social/u/Link9454"
      +apPublicUrl: "https://kbin.social/u/Link9454"
      +apFollowersUrl: "https://kbin.social/u/Link9454/followers"
      +apInboxUrl: "https://kbin.social/f/inbox"
      +apDomain: "kbin.social"
      +apPreferredUsername: "Link9454"
      +apDiscoverable: true
      +apManuallyApprovesFollowers: false
      +privateKey: null
      +publicKey: null
      +apFetchedAt: DateTime @1689094864 {#4044
        date: 2023-07-11 19:01:04.0 +02:00
      }
      +apDeletedAt: null
      +apTimeoutAt: null
      +visibility: "visible             "
      +createdAt: DateTimeImmutable @1687444139 {#4042
        date: 2023-06-22 16:28:59.0 +02:00
      }
    }
    +entry: App\Entity\Entry {#2388
      +user: Proxies\__CG__\App\Entity\User {#1943
        +avatar: null
        +cover: null
        +email: "Saigonauticon@voltage.vn"
        +username: "@Saigonauticon@voltage.vn"
        +roles: []
        +followersCount: 0
        +homepage: "front"
        +about: null
        +lastActive: DateTime @1703981706 {#1536
          date: 2023-12-31 01:15:06.0 +01:00
        }
        +markedForDeletionAt: null
        +fields: null
        +oauthGithubId: null
        +oauthGoogleId: null
        +oauthFacebookId: null
        +oauthKeycloakId: null
        +hideAdult: true
        +showSubscribedUsers: true
        +showSubscribedMagazines: true
        +showSubscribedDomains: true
        +preferredLanguages: []
        +featuredMagazines: null
        +showProfileSubscriptions: true
        +showProfileFollowings: true
        +markNewComments: false
        +notifyOnNewEntry: false
        +notifyOnNewEntryReply: false
        +notifyOnNewEntryCommentReply: false
        +notifyOnNewPost: false
        +notifyOnNewPostReply: false
        +notifyOnNewPostCommentReply: false
        +addMentionsEntries: false
        +addMentionsPosts: true
        +isBanned: false
        +isVerified: false
        +isDeleted: false
        +isBot: false
        +spamProtection: true
        +customCss: null
        +ignoreMagazinesCustomCss: false
        +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
        +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
        +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
        +entries: Doctrine\ORM\PersistentCollection {#1631 …}
        +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
        +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
        +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
        +posts: Doctrine\ORM\PersistentCollection {#1659 …}
        +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
        +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
        +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
        +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
        +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
        +follows: Doctrine\ORM\PersistentCollection {#1660 …}
        +followers: Doctrine\ORM\PersistentCollection {#1627 …}
        +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
        +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
        +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
        +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
        +reports: Doctrine\ORM\PersistentCollection {#1425 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
        +violations: Doctrine\ORM\PersistentCollection {#1699 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
        +awards: Doctrine\ORM\PersistentCollection {#1430 …}
        +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
        +categories: Doctrine\ORM\PersistentCollection {#1645 …}
        -id: 269
        -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
        -totpSecret: null
        -totpBackupCodes: []
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        \n
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    +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
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        \n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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    +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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    +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
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        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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    +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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        Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
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        If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
        """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
      \n
      If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
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    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
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    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  "showAvatar" => false
]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#5147
  +user: Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
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    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
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    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
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    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +showAvatar: false
}
date App\Twig\Components\DateComponent 12.0 MiB 0.15 ms
Input props 
[
  "date" => DateTimeImmutable @1689144068 {#4270
    date: 2023-07-12 08:41:08.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#5202
  +date: DateTimeImmutable @1689144068 {#4270
    date: 2023-07-12 08:41:08.0 +02:00
  }
}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.10 ms
Input props 
[
  "createdAt" => DateTimeImmutable @1689144068 {#4270
    date: 2023-07-12 08:41:08.0 +02:00
  }
  "editedAt" => null
]
Attributes 
[]
Component 
App\Twig\Components\DateEditedComponent {#5256
  +createdAt: DateTimeImmutable @1689144068 {#4270
    date: 2023-07-12 08:41:08.0 +02:00
  }
  +editedAt: null
}
user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.19 ms
Input props 
[
  "user" => Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
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    +hideAdult: true
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    +showSubscribedMagazines: true
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    +preferredLanguages: []
    +featuredMagazines: null
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    +showProfileFollowings: true
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    +notifyOnNewPostReply: false
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    +addMentionsPosts: true
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    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
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    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
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    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
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    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
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    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
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    +apDeletedAt: null
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    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  "width" => 40
  "height" => 40
  "asLink" => true
]
Attributes 
[]
Component 
App\Twig\Components\UserAvatarComponent {#5310
  +width: 40
  +height: 40
  +user: Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
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    +showSubscribedUsers: true
    +showSubscribedMagazines: true
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    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
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    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
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    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
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    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
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    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
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    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
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    +apDiscoverable: true
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    +privateKey: null
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      date: 2024-03-04 21:32:16.0 +01:00
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    +apDeletedAt: null
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      date: 2023-06-16 06:37:26.0 +02:00
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    +__isInitialized__: true
     …2
  }
  +asLink: true
}
vote App\Twig\Components\VoteComponent 12.0 MiB 0.64 ms
Input props 
[
  "subject" => App\Entity\EntryComment {#4271
    +user: Proxies\__CG__\App\Entity\User {#1943
      +avatar: null
      +cover: null
      +email: "Saigonauticon@voltage.vn"
      +username: "@Saigonauticon@voltage.vn"
      +roles: []
      +followersCount: 0
      +homepage: "front"
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      +lastActive: DateTime @1703981706 {#1536
        date: 2023-12-31 01:15:06.0 +01:00
      }
      +markedForDeletionAt: null
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      +markNewComments: false
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      +notifyOnNewEntryCommentReply: false
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      +addMentionsPosts: true
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      +isBot: false
      +spamProtection: true
      +customCss: null
      +ignoreMagazinesCustomCss: false
      +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
      +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
      +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
      +entries: Doctrine\ORM\PersistentCollection {#1631 …}
      +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
      +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
      +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
      +posts: Doctrine\ORM\PersistentCollection {#1659 …}
      +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
      +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
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      +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
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      +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
      +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
      +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
      +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
      +reports: Doctrine\ORM\PersistentCollection {#1425 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
      +violations: Doctrine\ORM\PersistentCollection {#1699 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
      +awards: Doctrine\ORM\PersistentCollection {#1430 …}
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      -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
      -totpSecret: null
      -totpBackupCodes: []
      -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
      +apId: "Saigonauticon@voltage.vn"
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      +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
      +apFollowersUrl: null
      +apInboxUrl: "https://voltage.vn/inbox"
      +apDomain: "voltage.vn"
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      +apDiscoverable: true
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      +privateKey: null
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      +apFetchedAt: DateTime @1709584336 {#1515
        date: 2024-03-04 21:32:16.0 +01:00
      }
      +apDeletedAt: null
      +apTimeoutAt: null
      +visibility: "visible             "
      +createdAt: DateTimeImmutable @1686890246 {#1516
        date: 2023-06-16 06:37:26.0 +02:00
      }
      +__isInitialized__: true
       …2
    }
    +entry: App\Entity\Entry {#2388
      +user: Proxies\__CG__\App\Entity\User {#1943 …2}
      +magazine: App\Entity\Magazine {#266
        +icon: Proxies\__CG__\App\Entity\Image {#247 …}
        +name: "askelectronics@discuss.tchncs.de"
        +title: "askelectronics"
        +description: """
          **For questions about component-level electronic circuits, tools and equipment.**\n
          \n
          Rules\n
          -----\n
          \n
          1: Be nice.\n
          \n
          2: Be on-topic (eg: *Electronic*, not *electrical*).\n
          \n
          3: No commercial stuff, buying, selling or valuations.\n
          \n
          4: Be safe.\n
          \n
          ---
          """
        +rules: null
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        +postCommentCount: 4
        +isAdult: false
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          date: 2024-10-20 10:40:08.0 +02:00
        }
        +markedForDeletionAt: null
        +tags: null
        +moderators: Doctrine\ORM\PersistentCollection {#238 …}
        +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
        +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
        +entries: Doctrine\ORM\PersistentCollection {#181 …}
        +posts: Doctrine\ORM\PersistentCollection {#139 …}
        +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
        +bans: Doctrine\ORM\PersistentCollection {#118 …}
        +reports: Doctrine\ORM\PersistentCollection {#104 …}
        +badges: Doctrine\ORM\PersistentCollection {#82 …}
        +logs: Doctrine\ORM\PersistentCollection {#72 …}
        +awards: Doctrine\ORM\PersistentCollection {#61 …}
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        -id: 11
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        +apInboxUrl: "https://discuss.tchncs.de/inbox"
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        +apPreferredUsername: "askelectronics"
        +apDiscoverable: true
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        +apFetchedAt: DateTime @1727247714 {#270
          date: 2024-09-25 09:01:54.0 +02:00
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        +apDeletedAt: null
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        +visibility: "visible             "
        +createdAt: DateTimeImmutable @1687144409 {#272
          date: 2023-06-19 05:13:29.0 +02:00
        }
      }
      +image: Proxies\__CG__\App\Entity\Image {#1962 …}
      +domain: Proxies\__CG__\App\Entity\Domain {#1924 …}
      +slug: "Transistor-particle-detector-not-functioning-as-expected"
      +title: "Transistor particle detector not functioning as expected"
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
      \n
      If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
      \n
      If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
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      If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
      \n
      If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I work with a lot of particle detectors. Instead of this, I recommend a photo diode and laser diode. Light dispersal particle counting is relatively easy to pull off by comparison to scraping off coating and all that. You could even use a very small segment of solar panel and a light source or an IR detector and IR LED similar to a smoke detector."
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      Ah, by ‘particle’ in this context I mean ‘single helium nuclei traveling near the speed of light’. Not counting dust particles e.g. in a clean room.\n
      \n
      If I’ve misunderstood the situation and I actually can use light diffusion in this context, I would love to hear more!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
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        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      -bodyTs: "'2n3055':9 '5mev':54 'ac':117 'ac-coupl':116 'academ':289 'ad':256 'alpha':51,133,222,266 'amplif':243 'around':56 'assumpt':185 'base':97 'beam':70 'big':258 'bjt':10 'bjts':259 'block':264 'care':27 'caus':131 'certain':168 'character':282 'circuit':89 'clear':240 'coat':30 'compound':43 'coupl':118 'current':146 'curv':173 'dab':39 'day':261 'decap':15 'decay':128,172 'detector':179,286 'discret':196 'document':284 'domain':236 'done':4 'door':167 'downward':72 'electr':158 'electron':142 'enough':141,262 'even':239 'exercis':290 'expect':103 'expiri':271 'expos':33,75 'face':71 'feel':201 'float':100 'flow':147 'fluoresc':161 'follow':125 'glass':253 'gnd':112 'good':226 'happen':105 'howev':148 'impact':135 'insert':64 'interest':280 'knock':139 'lab':58 'lamp':162 'larg':8,20 'layer':254 'left':99 'less':154,213 'lie':55 'lightproof':83 'like':202 'loos':140 'm':278 'made':82 'make':182 'mayb':156,218,245 'metal':22 'metal-can':21 'miss':205 'modifi':94 'most':279 'much':198,276 'next':166 'nois':159 'noth':155 'npn':11 'particl':134 'passiv':252 'past':270 'permit':144 'pot':42 'power':12 'previous':60 'question':219 'reattach':80 'relat':110 'remov':28 'right':214 'room':165 'scope':115 'see':121,151,241 'seen':176 'shown':90 'signal':230 'silicon':34,41,76,137 'silli':207 'sinc':192 'small':122 'someth':206 'somewher':186 'sourc':52,223,268 'spike':124,171 'still':225 'strength':231 'suspect':248 'take':6 'thin':251 'threw':86 'togeth':87 'toward':73 'tp1':109 'transistor':13,95,197 'type':24 'typic':36 'use':92 've':3,175 'voltag':123,235 'weak':50 'whether':220,228 'without':242 'work':61,194 'wrong':184"
      +cross: false
      +upVotes: 0
      +downVotes: 0
      +ranking: 1688080608
      +visibility: "visible             "
      +apId: "https://voltage.vn/post/5101"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688014108 {#1850
        date: 2023-06-29 06:48:28.0 +02:00
      }
    }
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
    +lang: "en"
    +isAdult: false
    +favouriteCount: 1
    +score: 0
    +lastActive: DateTime @1688360801 {#4078
      date: 2023-07-03 07:06:41.0 +02:00
    }
    +ip: null
    +tags: null
    +mentions: [
      "@Saigonauticon@voltage.vn"
    ]
    +children: Doctrine\ORM\PersistentCollection {#4077 …}
    +nested: Doctrine\ORM\PersistentCollection {#4076 …}
    +votes: Doctrine\ORM\PersistentCollection {#4067 …}
    +reports: Doctrine\ORM\PersistentCollection {#4070 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4065 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4063 …}
    -id: 5111
    -bodyTs: "'check':1 'coat':14 'damag':6,10 'might':8 'remov':13 'substrat':17 'transistor':4"
    +ranking: 0
    +commentCount: 0
    +upVotes: 0
    +downVotes: 0
    +visibility: "visible             "
    +apId: "https://lemmy.fmhy.ml/comment/462165"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688025501 {#4083
      date: 2023-06-29 09:58:21.0 +02:00
    }
  }
  +showMagazineName: false
  +showEntryTitle: false
  +showNested: true
  +level: 1
  +canSeeTrash: false
  +dateAsUrl: false
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
  -authorizationChecker: Symfony\Component\Security\Core\Authorization\AuthorizationChecker {#931 …}
}
user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.12 ms
Input props 
[
  "user" => App\Entity\User {#4061
    +avatar: Proxies\__CG__\App\Entity\Image {#4060 …}
    +cover: null
    +email: "0x4E4F@lemmy.fmhy.ml"
    +username: "@0x4E4F@lemmy.fmhy.ml"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689714104 {#4081
      date: 2023-07-18 23:01:44.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#4059 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#4057 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#4055 …}
    +entries: Doctrine\ORM\PersistentCollection {#4053 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#4051 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#4110 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#4111 …}
    +posts: Doctrine\ORM\PersistentCollection {#4113 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#4115 …}
    +postComments: Doctrine\ORM\PersistentCollection {#4117 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#4119 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#4121 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#4123 …}
    +follows: Doctrine\ORM\PersistentCollection {#4125 …}
    +followers: Doctrine\ORM\PersistentCollection {#4127 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4129 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4131 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4133 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4135 …}
    +reports: Doctrine\ORM\PersistentCollection {#4137 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4139 …}
    +violations: Doctrine\ORM\PersistentCollection {#4141 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4143 …}
    +awards: Doctrine\ORM\PersistentCollection {#4145 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4147 …}
    +categories: Doctrine\ORM\PersistentCollection {#4149 …}
    -id: 11195
    -password: "$2y$13$lYa685Fpzqb6pCyZ7WfpxesIrG614HtEQsn91XB/WFrgO5Rj37NvS"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4151 …}
    +apId: "0x4E4F@lemmy.fmhy.ml"
    +apProfileId: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apPublicUrl: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apFollowersUrl: null
    +apInboxUrl: "https://lemmy.fmhy.ml/inbox"
    +apDomain: "lemmy.fmhy.ml"
    +apPreferredUsername: "0x4E4F"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689713342 {#4082
      date: 2023-07-18 22:49:02.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687743736 {#4079
      date: 2023-06-26 03:42:16.0 +02:00
    }
  }
  "showAvatar" => false
]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#5801
  +user: App\Entity\User {#4061
    +avatar: Proxies\__CG__\App\Entity\Image {#4060 …}
    +cover: null
    +email: "0x4E4F@lemmy.fmhy.ml"
    +username: "@0x4E4F@lemmy.fmhy.ml"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689714104 {#4081
      date: 2023-07-18 23:01:44.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#4059 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#4057 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#4055 …}
    +entries: Doctrine\ORM\PersistentCollection {#4053 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#4051 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#4110 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#4111 …}
    +posts: Doctrine\ORM\PersistentCollection {#4113 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#4115 …}
    +postComments: Doctrine\ORM\PersistentCollection {#4117 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#4119 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#4121 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#4123 …}
    +follows: Doctrine\ORM\PersistentCollection {#4125 …}
    +followers: Doctrine\ORM\PersistentCollection {#4127 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4129 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4131 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4133 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4135 …}
    +reports: Doctrine\ORM\PersistentCollection {#4137 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4139 …}
    +violations: Doctrine\ORM\PersistentCollection {#4141 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4143 …}
    +awards: Doctrine\ORM\PersistentCollection {#4145 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4147 …}
    +categories: Doctrine\ORM\PersistentCollection {#4149 …}
    -id: 11195
    -password: "$2y$13$lYa685Fpzqb6pCyZ7WfpxesIrG614HtEQsn91XB/WFrgO5Rj37NvS"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4151 …}
    +apId: "0x4E4F@lemmy.fmhy.ml"
    +apProfileId: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apPublicUrl: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apFollowersUrl: null
    +apInboxUrl: "https://lemmy.fmhy.ml/inbox"
    +apDomain: "lemmy.fmhy.ml"
    +apPreferredUsername: "0x4E4F"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689713342 {#4082
      date: 2023-07-18 22:49:02.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687743736 {#4079
      date: 2023-06-26 03:42:16.0 +02:00
    }
  }
  +showAvatar: false
}
date App\Twig\Components\DateComponent 12.0 MiB 0.14 ms
Input props 
[
  "date" => DateTimeImmutable @1688025501 {#4083
    date: 2023-06-29 09:58:21.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#5856
  +date: DateTimeImmutable @1688025501 {#4083
    date: 2023-06-29 09:58:21.0 +02:00
  }
}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.09 ms
Input props 
[
  "createdAt" => DateTimeImmutable @1688025501 {#4083
    date: 2023-06-29 09:58:21.0 +02:00
  }
  "editedAt" => null
]
Attributes 
[]
Component 
App\Twig\Components\DateEditedComponent {#5910
  +createdAt: DateTimeImmutable @1688025501 {#4083
    date: 2023-06-29 09:58:21.0 +02:00
  }
  +editedAt: null
}
user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.43 ms
Input props 
[
  "user" => App\Entity\User {#4061
    +avatar: Proxies\__CG__\App\Entity\Image {#4060 …}
    +cover: null
    +email: "0x4E4F@lemmy.fmhy.ml"
    +username: "@0x4E4F@lemmy.fmhy.ml"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689714104 {#4081
      date: 2023-07-18 23:01:44.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#4059 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#4057 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#4055 …}
    +entries: Doctrine\ORM\PersistentCollection {#4053 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#4051 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#4110 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#4111 …}
    +posts: Doctrine\ORM\PersistentCollection {#4113 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#4115 …}
    +postComments: Doctrine\ORM\PersistentCollection {#4117 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#4119 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#4121 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#4123 …}
    +follows: Doctrine\ORM\PersistentCollection {#4125 …}
    +followers: Doctrine\ORM\PersistentCollection {#4127 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4129 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4131 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4133 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4135 …}
    +reports: Doctrine\ORM\PersistentCollection {#4137 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4139 …}
    +violations: Doctrine\ORM\PersistentCollection {#4141 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4143 …}
    +awards: Doctrine\ORM\PersistentCollection {#4145 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4147 …}
    +categories: Doctrine\ORM\PersistentCollection {#4149 …}
    -id: 11195
    -password: "$2y$13$lYa685Fpzqb6pCyZ7WfpxesIrG614HtEQsn91XB/WFrgO5Rj37NvS"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4151 …}
    +apId: "0x4E4F@lemmy.fmhy.ml"
    +apProfileId: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apPublicUrl: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apFollowersUrl: null
    +apInboxUrl: "https://lemmy.fmhy.ml/inbox"
    +apDomain: "lemmy.fmhy.ml"
    +apPreferredUsername: "0x4E4F"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689713342 {#4082
      date: 2023-07-18 22:49:02.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687743736 {#4079
      date: 2023-06-26 03:42:16.0 +02:00
    }
  }
  "width" => 40
  "height" => 40
  "asLink" => true
]
Attributes 
[]
Component 
App\Twig\Components\UserAvatarComponent {#5964
  +width: 40
  +height: 40
  +user: App\Entity\User {#4061
    +avatar: Proxies\__CG__\App\Entity\Image {#4060 …}
    +cover: null
    +email: "0x4E4F@lemmy.fmhy.ml"
    +username: "@0x4E4F@lemmy.fmhy.ml"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1689714104 {#4081
      date: 2023-07-18 23:01:44.0 +02:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#4059 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#4057 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#4055 …}
    +entries: Doctrine\ORM\PersistentCollection {#4053 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#4051 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#4110 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#4111 …}
    +posts: Doctrine\ORM\PersistentCollection {#4113 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#4115 …}
    +postComments: Doctrine\ORM\PersistentCollection {#4117 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#4119 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#4121 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#4123 …}
    +follows: Doctrine\ORM\PersistentCollection {#4125 …}
    +followers: Doctrine\ORM\PersistentCollection {#4127 …}
    +blocks: Doctrine\ORM\PersistentCollection {#4129 …}
    +blockers: Doctrine\ORM\PersistentCollection {#4131 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#4133 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#4135 …}
    +reports: Doctrine\ORM\PersistentCollection {#4137 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4139 …}
    +violations: Doctrine\ORM\PersistentCollection {#4141 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4143 …}
    +awards: Doctrine\ORM\PersistentCollection {#4145 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#4147 …}
    +categories: Doctrine\ORM\PersistentCollection {#4149 …}
    -id: 11195
    -password: "$2y$13$lYa685Fpzqb6pCyZ7WfpxesIrG614HtEQsn91XB/WFrgO5Rj37NvS"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4151 …}
    +apId: "0x4E4F@lemmy.fmhy.ml"
    +apProfileId: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apPublicUrl: "https://lemmy.fmhy.ml/u/0x4E4F"
    +apFollowersUrl: null
    +apInboxUrl: "https://lemmy.fmhy.ml/inbox"
    +apDomain: "lemmy.fmhy.ml"
    +apPreferredUsername: "0x4E4F"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1689713342 {#4082
      date: 2023-07-18 22:49:02.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687743736 {#4079
      date: 2023-06-26 03:42:16.0 +02:00
    }
  }
  +asLink: true
}
vote App\Twig\Components\VoteComponent 12.0 MiB 0.38 ms
Input props 
[
  "subject" => App\Entity\EntryComment {#4072
    +user: App\Entity\User {#4061
      +avatar: Proxies\__CG__\App\Entity\Image {#4060 …}
      +cover: null
      +email: "0x4E4F@lemmy.fmhy.ml"
      +username: "@0x4E4F@lemmy.fmhy.ml"
      +roles: []
      +followersCount: 0
      +homepage: "front"
      +about: null
      +lastActive: DateTime @1689714104 {#4081
        date: 2023-07-18 23:01:44.0 +02:00
      }
      +markedForDeletionAt: null
      +fields: null
      +oauthGithubId: null
      +oauthGoogleId: null
      +oauthFacebookId: null
      +oauthKeycloakId: null
      +hideAdult: true
      +showSubscribedUsers: true
      +showSubscribedMagazines: true
      +showSubscribedDomains: true
      +preferredLanguages: []
      +featuredMagazines: null
      +showProfileSubscriptions: true
      +showProfileFollowings: true
      +markNewComments: false
      +notifyOnNewEntry: false
      +notifyOnNewEntryReply: false
      +notifyOnNewEntryCommentReply: false
      +notifyOnNewPost: false
      +notifyOnNewPostReply: false
      +notifyOnNewPostCommentReply: false
      +addMentionsEntries: false
      +addMentionsPosts: true
      +isBanned: false
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      +isDeleted: false
      +isBot: false
      +spamProtection: true
      +customCss: null
      +ignoreMagazinesCustomCss: false
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          **For questions about component-level electronic circuits, tools and equipment.**\n
          \n
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          2: Be on-topic (eg: *Electronic*, not *electrical*).\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      +slug: "Transistor-particle-detector-not-functioning-as-expected"
      +title: "Transistor particle detector not functioning as expected"
      +url: "https://voltage.vn/pictrs/image/ff911d7e-6580-4084-af41-7a30c4882399.png"
      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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    +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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      +body: """
        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      +body: """
        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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      +body: """
        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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        +body: "Glad I could help 👍."
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      +body: """
        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      +body: """
        I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
        \n
        With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
        \n
        So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
        \n
        the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
        """
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          **For questions about component-level electronic circuits, tools and equipment.**\n
          \n
          Rules\n
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          1: Be nice.\n
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          2: Be on-topic (eg: *Electronic*, not *electrical*).\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
      \n
      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
      """
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          **For questions about component-level electronic circuits, tools and equipment.**\n
          \n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
      \n
      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
      """
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          \n
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          \n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      Maybe -- easy to check, at least. I'll just shine a light on it :)\n
      \n
      The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.12 ms
Input props 
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Component 
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date App\Twig\Components\DateComponent 12.0 MiB 0.13 ms
Input props 
[
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    date: 2023-06-29 10:32:04.0 +02:00
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]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#7125
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}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.13 ms
Input props 
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Attributes 
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Component 
App\Twig\Components\DateEditedComponent {#7179
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  +editedAt: DateTimeImmutable @1688027561 {#4298
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user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.17 ms
Input props 
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Attributes 
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Component 
App\Twig\Components\UserAvatarComponent {#7233
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vote App\Twig\Components\VoteComponent 12.0 MiB 0.42 ms
Input props 
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          **For questions about component-level electronic circuits, tools and equipment.**\n
          \n
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          \n
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      +slug: "Transistor-particle-detector-not-functioning-as-expected"
      +title: "Transistor particle detector not functioning as expected"
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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      +body: """
        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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          \n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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      +body: """
        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        -bodyTs: "'check':1 'coat':14 'damag':6,10 'might':8 'remov':13 'substrat':17 'transistor':4"
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      +body: """
        Maybe -- easy to check, at least. I'll just shine a light on it :)\n
        \n
        The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
        """
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    +body: """
      That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
      \n
      Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
      """
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        +body: """
          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.12 ms
Input props 
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Input props 
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Attributes 
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Component 
App\Twig\Components\DateComponent {#7591
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App\Twig\Components\DateEditedComponent {#7645
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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      +body: """
        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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      +body: """
        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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          **For questions about component-level electronic circuits, tools and equipment.**\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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      +body: """
        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: "Yeah, no harm in giving it a quick test I guess, will only take me 5 mins when I'm back at my bench."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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        +body: """
          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        +body: """
          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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      +body: """
        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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    +body: """
      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.12 ms
Input props 
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Component 
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Attributes 
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Component 
App\Twig\Components\UserAvatarComponent {#8339
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vote App\Twig\Components\VoteComponent 12.0 MiB 0.45 ms
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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      +body: """
        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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          **For questions about component-level electronic circuits, tools and equipment.**\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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          +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          Maybe -- easy to check, at least. I'll just shine a light on it :)\n
          \n
          The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
          """
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        That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
        \n
        Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
        """
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      Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
      \n
      I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
      \n
      Thanks for the tip!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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    +body: "Glad I could help 👍."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          +body: """
            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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    +body: "Glad I could help 👍."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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    +body: "Glad I could help 👍."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          +body: """
            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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        +body: """
          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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      +body: """
        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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    +body: "Glad I could help 👍."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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      +slug: "Transistor-particle-detector-not-functioning-as-expected"
      +title: "Transistor particle detector not functioning as expected"
      +url: "https://voltage.vn/pictrs/image/ff911d7e-6580-4084-af41-7a30c4882399.png"
      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          +body: """
            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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        +body: """
          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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      +body: """
        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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    +body: "Glad I could help 👍."
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      +slug: "Transistor-particle-detector-not-functioning-as-expected"
      +title: "Transistor particle detector not functioning as expected"
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          +body: """
            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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        +body: """
          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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            +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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          +body: """
            Maybe -- easy to check, at least. I'll just shine a light on it :)\n
            \n
            The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
            """
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        +body: """
          That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
          \n
          Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
          """
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      +body: """
        Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
        \n
        I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
        \n
        Thanks for the tip!
        """
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            +body: """
              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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          +body: """
            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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        +body: """
          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      +body: "Glad I could help 👍."
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    +body: """
      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            +body: """
              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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          +body: """
            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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        +body: """
          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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        -bodyTs: "'abus':52 'actual':32 'also':20 'altern':73 'base':18 'big':62 'bjt':74 'close':24 'compound':37,80 'deal':63 'fail':4,7,13,66 'find':71 'go':70 'got':58 'guess':55 'happen':50 'hard':6 'light':10 'like':42 'll':69 'm':31 'measur':21 'ok':2 'peel':43 'pin':29 'pot':36,79 'pretti':5 'quit':33 'resist':23 'satur':19 'semiconductor':53 'smooth':41 'spare':59 'sticker':46 'surgeri':38 'surpris':34 'switch':15 'test':11 'thank':81 'thing':49 'tip':84 've':57 'well':47 'went':39 'wow':1 'zero':26"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://voltage.vn/comment/22045"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688097129 {#4330
          date: 2023-06-30 05:52:09.0 +02:00
        }
      }
      +root: App\Entity\EntryComment {#4072}
      +body: "Glad I could help 👍."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688118317 {#4350
        date: 2023-06-30 11:45:17.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Saigonauticon@voltage.vn"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#4353 …}
      +nested: Doctrine\ORM\PersistentCollection {#4357 …}
      +votes: Doctrine\ORM\PersistentCollection {#4359 …}
      +reports: Doctrine\ORM\PersistentCollection {#4360 …}
      +favourites: Doctrine\ORM\PersistentCollection {#4362 …}
      +notifications: Doctrine\ORM\PersistentCollection {#4364 …}
      -id: 5915
      -bodyTs: "'could':3 'glad':1 'help':4"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://lemmy.fmhy.ml/comment/482123"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688118317 {#4347
        date: 2023-06-30 11:45:17.0 +02:00
      }
    }
    +root: App\Entity\EntryComment {#4072}
    +body: """
      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
    +lang: "en"
    +isAdult: false
    +favouriteCount: 0
    +score: 0
    +lastActive: DateTime @1688279939 {#4376
      date: 2023-07-02 08:38:59.0 +02:00
    }
    +ip: null
    +tags: null
    +mentions: [
      "@Saigonauticon@voltage.vn"
      "@0x4E4F@lemmy.fmhy.ml"
    ]
    +children: Doctrine\ORM\PersistentCollection {#4373 …}
    +nested: Doctrine\ORM\PersistentCollection {#4370 …}
    +votes: Doctrine\ORM\PersistentCollection {#4368 …}
    +reports: Doctrine\ORM\PersistentCollection {#4382 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4384 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4386 …}
    -id: 6967
    -bodyTs: "'experi':5 'modif':14 'new':8 'oh':21 'ok':1,12 'repeat':3 'result':17 'sad':15 'test':11 'transistor':9 'well':22"
    +ranking: 0
    +commentCount: 0
    +upVotes: 0
    +downVotes: 0
    +visibility: "visible             "
    +apId: "https://voltage.vn/comment/24443"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688279939 {#4379
      date: 2023-07-02 08:38:59.0 +02:00
    }
  }
  +showMagazineName: false
  +showEntryTitle: false
  +showNested: true
  +level: 6
  +canSeeTrash: false
  +dateAsUrl: false
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
  -authorizationChecker: Symfony\Component\Security\Core\Authorization\AuthorizationChecker {#931 …}
}
user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.24 ms
Input props 
[
  "user" => Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  "showAvatar" => false
]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#9443
  +user: Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +showAvatar: false
}
date App\Twig\Components\DateComponent 12.0 MiB 0.22 ms
Input props 
[
  "date" => DateTimeImmutable @1688279939 {#4379
    date: 2023-07-02 08:38:59.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#9498
  +date: DateTimeImmutable @1688279939 {#4379
    date: 2023-07-02 08:38:59.0 +02:00
  }
}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.13 ms
Input props 
[
  "createdAt" => DateTimeImmutable @1688279939 {#4379
    date: 2023-07-02 08:38:59.0 +02:00
  }
  "editedAt" => null
]
Attributes 
[]
Component 
App\Twig\Components\DateEditedComponent {#9552
  +createdAt: DateTimeImmutable @1688279939 {#4379
    date: 2023-07-02 08:38:59.0 +02:00
  }
  +editedAt: null
}
user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.19 ms
Input props 
[
  "user" => Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  "width" => 40
  "height" => 40
  "asLink" => true
]
Attributes 
[]
Component 
App\Twig\Components\UserAvatarComponent {#9606
  +width: 40
  +height: 40
  +user: Proxies\__CG__\App\Entity\User {#1943
    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
    +followersCount: 0
    +homepage: "front"
    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: false
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +asLink: true
}
vote App\Twig\Components\VoteComponent 12.0 MiB 1.08 ms
Input props 
[
  "subject" => App\Entity\EntryComment {#4381
    +user: Proxies\__CG__\App\Entity\User {#1943
      +avatar: null
      +cover: null
      +email: "Saigonauticon@voltage.vn"
      +username: "@Saigonauticon@voltage.vn"
      +roles: []
      +followersCount: 0
      +homepage: "front"
      +about: null
      +lastActive: DateTime @1703981706 {#1536
        date: 2023-12-31 01:15:06.0 +01:00
      }
      +markedForDeletionAt: null
      +fields: null
      +oauthGithubId: null
      +oauthGoogleId: null
      +oauthFacebookId: null
      +oauthKeycloakId: null
      +hideAdult: true
      +showSubscribedUsers: true
      +showSubscribedMagazines: true
      +showSubscribedDomains: true
      +preferredLanguages: []
      +featuredMagazines: null
      +showProfileSubscriptions: true
      +showProfileFollowings: true
      +markNewComments: false
      +notifyOnNewEntry: false
      +notifyOnNewEntryReply: false
      +notifyOnNewEntryCommentReply: false
      +notifyOnNewPost: false
      +notifyOnNewPostReply: false
      +notifyOnNewPostCommentReply: false
      +addMentionsEntries: false
      +addMentionsPosts: true
      +isBanned: false
      +isVerified: false
      +isDeleted: false
      +isBot: false
      +spamProtection: true
      +customCss: null
      +ignoreMagazinesCustomCss: false
      +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
      +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
      +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
      +entries: Doctrine\ORM\PersistentCollection {#1631 …}
      +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
      +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
      +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            +body: """
              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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          +body: """
            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      +body: "Glad I could help 👍."
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      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
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      Sadly, the results are the same. Oh well!
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      +body: "Glad I could help 👍."
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      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            +body: """
              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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          +body: """
            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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        +body: """
          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      +body: "Glad I could help 👍."
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    +body: """
      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            +body: """
              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      +body: "Glad I could help 👍."
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    +body: """
      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
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      +slug: "Transistor-particle-detector-not-functioning-as-expected"
      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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              +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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            +body: """
              Maybe -- easy to check, at least. I'll just shine a light on it :)\n
              \n
              The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
              """
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          +body: """
            That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
            \n
            Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
            """
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        +body: """
          Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
          \n
          I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
          \n
          Thanks for the tip!
          """
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      +body: "Glad I could help 👍."
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      OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
      \n
      Sadly, the results are the same. Oh well!
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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              +body: """
                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                \n
                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                """
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            +body: """
              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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                date: 2023-06-29 10:04:21.0 +02:00
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            +body: """
              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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          +body: """
            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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      +body: """
        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
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              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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          +body: """
            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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              +body: """
                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                \n
                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                """
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            +body: """
              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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          +body: """
            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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      +body: """
        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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              +body: """
                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                \n
                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                """
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            +body: """
              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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          +body: """
            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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      +body: """
        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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          **For questions about component-level electronic circuits, tools and equipment.**\n
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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              +body: """
                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                \n
                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                """
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            +body: """
              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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          +body: """
            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
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        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
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                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                """
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              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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              +body: """
                Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                \n
                The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                """
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            +body: """
              That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
              \n
              Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
              """
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          +body: """
            Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
            \n
            I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
            \n
            Thanks for the tip!
            """
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        +body: "Glad I could help 👍."
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      +body: """
        OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
        \n
        Sadly, the results are the same. Oh well!
        """
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    +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                +body: """
                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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              +body: """
                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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            +body: """
              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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        +body: """
          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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    +body: """
      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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                date: 2023-06-29 10:32:04.0 +02:00
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            +body: """
              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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        +body: """
          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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    +body: """
      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.24 ms
Input props 
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date App\Twig\Components\DateComponent 12.0 MiB 0.15 ms
Input props 
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Attributes 
[]
Component 
App\Twig\Components\DateComponent {#10761
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date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.11 ms
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Attributes 
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Component 
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Input props 
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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            +body: """
              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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        +body: """
          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                +body: """
                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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        +body: """
          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                +body: """
                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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              +body: """
                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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            +body: """
              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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        +body: """
          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                +body: """
                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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              +body: """
                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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            +body: """
              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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        +body: """
          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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    +body: """
      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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                  +body: "Check if the transistor is damaged, you might have damaged it while removing coatings from the substrate."
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                  Maybe -- easy to check, at least. I'll just shine a light on it :)\n
                  \n
                  The coating came off pretty easily though. The bonding wires pass visual and mechanical inspection, and do not short on the case or other parts of the transistor.
                  """
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                That doesn’t actually mean it’s OK, there are cases where transistors and other descrete components are “semi-burnt” (tests check out, yet it doesn’t work or doesn’t work as it should). The ”not so reliable" test would be to use a multimeter and see the voltage drop between B-E and B-C. The definitive test would be to make an actual amplifier circut, use the transistor in it and see if it works and if it distorts the sound (there are also cases where the PN substrates are somewhat depleted or damaged, either through use or a manufacturing error, so it works, but distorts the signal).\n
                \n
                Do the light test, see if that passes, then do the multimeter test, see if that passes as well. If they both check out, 99% chance the transistor is OK. That 1% can be eliminated with the test circuit amp test.
                """
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              Wow, OK. It failed pretty hard. Fail on the light test, and failed to switch with the base saturated. Also measures a resistance close to zero between all pins.\n
              \n
              I'm actually quite surprised! The potting compound 'surgery' went very smoothly, like peeling off a sticker. Well, these things happen when abusing semiconductors I guess. I've got spares, so no big deal. If it fails again, I'll go find an alternative BJT that does not have potting compound.\n
              \n
              Thanks for the tip!
              """
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          +body: "Glad I could help 👍."
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          OK, I repeated the experiment with a new transistor (which tested OK after modification).\n
          \n
          Sadly, the results are the same. Oh well!
          """
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      +body: "Hm… don’t know why that happens, never made a particle detector, but I have modded TO-3 cased transistors to be photodectors, they usually worked great."
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      I suspect the reason it's not working, is something I don't currently have the tools to measure.\n
      \n
      With an OK reflected light microscope I could work out whether there's a glass or clear epoxy coating on the silicon. With an alpha spectroscope, I could characterize the source better. Tools are cheap in Asia, but the space to put them costs a fortune...\n
      \n
      So I'm going to shelve this for now and maybe try to build a BJT amplifier for a PIN photodiode detector. I've etched some boards. Fingers crossed.\n
      \n
      the smart thing of course would be to buy a scintillator crystal, but I hate the inelegance of it. It shouldn't be necessary.
      """
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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    +moderatorTokens: Doctrine\ORM\PersistentCollection {#4172 …}
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]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#11434
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    +avatar: null
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    +markedForDeletionAt: null
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    +customCss: null
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date App\Twig\Components\DateComponent 12.0 MiB 0.14 ms
Input props 
[
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    date: 2023-06-29 17:46:53.0 +02:00
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]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#11489
  +date: DateTimeImmutable @1688053613 {#4154
    date: 2023-06-29 17:46:53.0 +02:00
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}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.09 ms
Input props 
[
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    date: 2023-06-29 17:46:53.0 +02:00
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  "editedAt" => null
]
Attributes 
[]
Component 
App\Twig\Components\DateEditedComponent {#11543
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    date: 2023-06-29 17:46:53.0 +02:00
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  +editedAt: null
}
user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.14 ms
Input props 
[
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    +avatar: null
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]
Attributes 
[]
Component 
App\Twig\Components\UserAvatarComponent {#11597
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vote App\Twig\Components\VoteComponent 12.0 MiB 0.36 ms
Input props 
[
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      +visibility: "visible             "
      +createdAt: DateTimeImmutable @1686833691 {#4157
        date: 2023-06-15 14:54:51.0 +02:00
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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    +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      +title: "Transistor particle detector not functioning as expected"
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      +body: """
        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
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        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
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        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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    +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
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        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
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    +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
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        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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    +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      +body: """
        I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
        \n
        That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
        \n
        The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
        \n
        The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
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        It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
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        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      -bodyTs: "'/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)it':9 'advantag':15 'also':35,64 'batteri':59 'bjts':14 'circuit':53 'decap':26 'detector':67 'easi':24 'electromagnet':55 'get':20,30 'got':3 'import':47 'inspir':4 'instead':12 'light':69 'low':61 'low-nois':60 'much':40 'nois':62 'photodiod':11 'proper':50 'radiat':56 'realli':46 'scoollab.web.cern.ch':8 'scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)it':7 'shield':51,65 'spend':38 'think':43 'time':41 'use':10,57 'work':33"
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      +downVotes: 0
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      +editedAt: null
      +createdAt: DateTimeImmutable @1688053613 {#4154
        date: 2023-06-29 17:46:53.0 +02:00
      }
    }
    +root: App\Entity\EntryComment {#4158}
    +body: """
      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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    +isAdult: false
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    }
    +ip: null
    +tags: null
    +mentions: [
      "@Saigonauticon@voltage.vn"
      "@teri@discuss.tchncs.de"
    ]
    +children: Doctrine\ORM\PersistentCollection {#4257 …}
    +nested: Doctrine\ORM\PersistentCollection {#4259 …}
    +votes: Doctrine\ORM\PersistentCollection {#4261 …}
    +reports: Doctrine\ORM\PersistentCollection {#4263 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4265 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4267 …}
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  +showMagazineName: false
  +showEntryTitle: false
  +showNested: true
  +level: 2
  +canSeeTrash: false
  +dateAsUrl: false
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
  -authorizationChecker: Symfony\Component\Security\Core\Authorization\AuthorizationChecker {#931 …}
}
user_inline App\Twig\Components\UserInlineComponent 12.0 MiB 0.13 ms
Input props 
[
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    +avatar: null
    +cover: null
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    +username: "@Saigonauticon@voltage.vn"
    +roles: []
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    +about: null
    +lastActive: DateTime @1703981706 {#1536
      date: 2023-12-31 01:15:06.0 +01:00
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    +customCss: null
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    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
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    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
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    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
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    +privateKey: null
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     …2
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]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#12074
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    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
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    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
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     …2
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}
date App\Twig\Components\DateComponent 12.0 MiB 0.13 ms
Input props 
[
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    date: 2023-06-29 19:08:24.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#12129
  +date: DateTimeImmutable @1688058504 {#4255
    date: 2023-06-29 19:08:24.0 +02:00
  }
}
date_edited App\Twig\Components\DateEditedComponent 12.0 MiB 0.09 ms
Input props 
[
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    date: 2023-06-29 19:08:24.0 +02:00
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  "editedAt" => null
]
Attributes 
[]
Component 
App\Twig\Components\DateEditedComponent {#12183
  +createdAt: DateTimeImmutable @1688058504 {#4255
    date: 2023-06-29 19:08:24.0 +02:00
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  +editedAt: null
}
user_avatar App\Twig\Components\UserAvatarComponent 12.0 MiB 0.13 ms
Input props 
[
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    +avatar: null
    +cover: null
    +email: "Saigonauticon@voltage.vn"
    +username: "@Saigonauticon@voltage.vn"
    +roles: []
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      date: 2023-12-31 01:15:06.0 +01:00
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    +markedForDeletionAt: null
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     …2
  }
  "width" => 40
  "height" => 40
  "asLink" => true
]
Attributes 
[]
Component 
App\Twig\Components\UserAvatarComponent {#12237
  +width: 40
  +height: 40
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    +avatar: null
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    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
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}
vote App\Twig\Components\VoteComponent 12.0 MiB 0.44 ms
Input props 
[
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      +entries: Doctrine\ORM\PersistentCollection {#1631 …}
      +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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    +body: """
      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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          Rules\n
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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    +body: """
      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
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        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
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        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
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      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
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        What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it).\n
        \n
        Then, I had a weak alpha source at ~5MeV lying around the lab from previous work. This was inserted into the can with the beam facing downward towards the exposed silicon, and the can reattached and made lightproof.\n
        \n
        Then I threw together the circuit shown here using the modified transistor (the base is left floating). What I expected to happen was that at TP1 (relative to GND), with my scope AC-coupled, I should see small voltage spikes followed by a decay. This is caused by alpha particles impacting the silicon and knocking loose enough electrons to permit some current flow.\n
        \n
        However, I just see... more or less nothing, maybe some electrical noise from fluorescent lamps in the room next door. Certainly not the spike+decay curve I've seen with other detectors.\n
        \n
        Did I make a wrong assumption somewhere? It's been a while since I worked with discrete transistors much, and I feel like I am missing something silly.\n
        \n
        Or is this more or less right, and I should maybe question whether my alpha source is still good? Or whether the signal strength is in a voltage domain I can even clearly see without amplification? Or maybe I should suspect that a thin passivating glass layer is added to big BJTs these days, enough to block the alpha?\n
        \n
        The source is past expiry, but not by that much. I'm mostly interested in characterizing and documenting the detector as an academic exercise.
        """
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        -totpBackupCodes: []
        -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#4224 …}
        +apId: "teri@discuss.tchncs.de"
        +apProfileId: "https://discuss.tchncs.de/u/teri"
        +apPublicUrl: "https://discuss.tchncs.de/u/teri"
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        +apInboxUrl: "https://discuss.tchncs.de/inbox"
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        +privateKey: null
        +publicKey: null
        +apFetchedAt: DateTime @1702081408 {#4156
          date: 2023-12-09 01:23:28.0 +01:00
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        +visibility: "visible             "
        +createdAt: DateTimeImmutable @1686833691 {#4157
          date: 2023-06-15 14:54:51.0 +02:00
        }
      }
      +entry: App\Entity\Entry {#2388}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: null
      +root: null
      +body: "I once got inspired by this: [scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)It uses photodiodes instead of BJTs. Advantage is that you can get some which are easy to decap. I did not get it to work :/ but also did not spend so much time. I think what is really important is to properly shield the circuit from electromagnetic radiation, use a battery (low-noise) and also shield the detector from light."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688058507 {#4153
        date: 2023-06-29 19:08:27.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Saigonauticon@voltage.vn"
      ]
      +children: Doctrine\ORM\PersistentCollection {#4159 …}
      +nested: Doctrine\ORM\PersistentCollection {#4161 …}
      +votes: Doctrine\ORM\PersistentCollection {#4163 …}
      +reports: Doctrine\ORM\PersistentCollection {#4165 …}
      +favourites: Doctrine\ORM\PersistentCollection {#4167 …}
      +notifications: Doctrine\ORM\PersistentCollection {#4169 …}
      -id: 5325
      -bodyTs: "'/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)it':9 'advantag':15 'also':35,64 'batteri':59 'bjts':14 'circuit':53 'decap':26 'detector':67 'easi':24 'electromagnet':55 'get':20,30 'got':3 'import':47 'inspir':4 'instead':12 'light':69 'low':61 'low-nois':60 'much':40 'nois':62 'photodiod':11 'proper':50 'radiat':56 'realli':46 'scoollab.web.cern.ch':8 'scoollab.web.cern.ch/diy-particle-detector](https://scoollab.web.cern.ch/diy-particle-detector)it':7 'shield':51,65 'spend':38 'think':43 'time':41 'use':10,57 'work':33"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/472642"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688053613 {#4154
        date: 2023-06-29 17:46:53.0 +02:00
      }
    }
    +root: App\Entity\EntryComment {#4158}
    +body: """
      I've gotten a similar circuit to work. Good shielding on the preamp was indeed key.\n
      \n
      That was like 12 years ago though. Back then I used a battery. I probably know enough to get it working with a switched power supply now, which would be way more convenient.\n
      \n
      The PIN diodes aren't cheap though! Also some are export controlled. Not the one from that project though. I have a few around that I'll use if I can't get this to work.\n
      \n
      The BJT method is attractive due to really low cost. I never managed to get it working though. There are enough independent reports of the method working online that I think it's possible, but the documentation hasn't been sufficient to easily replicate it.\n
      \n
      It might be something boring like some manufacturers put a clear coating (e.g. glass) on the internals of a type of transistor, and others don't.
      """
    +lang: "en"
    +isAdult: false
    +favouriteCount: 1
    +score: 0
    +lastActive: DateTime @1688058504 {#4254
      date: 2023-06-29 19:08:24.0 +02:00
    }
    +ip: null
    +tags: null
    +mentions: [
      "@Saigonauticon@voltage.vn"
      "@teri@discuss.tchncs.de"
    ]
    +children: Doctrine\ORM\PersistentCollection {#4257 …}
    +nested: Doctrine\ORM\PersistentCollection {#4259 …}
    +votes: Doctrine\ORM\PersistentCollection {#4261 …}
    +reports: Doctrine\ORM\PersistentCollection {#4263 …}
    +favourites: Doctrine\ORM\PersistentCollection {#4265 …}
    +notifications: Doctrine\ORM\PersistentCollection {#4267 …}
    -id: 5399
    -bodyTs: "'12':20 'ago':22 'also':57 'aren':53 'around':73 'attract':90 'back':24 'batteri':29 'bjt':87 'bore':135 'cheap':55 'circuit':6 'clear':141 'coat':142 'control':61 'conveni':49 'cost':95 'diod':52 'document':122 'due':91 'e.g':143 'easili':128 'enough':33,106 'export':60 'get':35,82,100 'glass':144 'good':9 'gotten':3 'hasn':123 'inde':15 'independ':107 'intern':147 'key':16 'know':32 'like':19,136 'll':76 'low':94 'manag':98 'manufactur':138 'method':88,111 'might':132 'never':97 'one':64 'onlin':113 'other':154 'pin':51 'possibl':119 'power':41 'preamp':13 'probabl':31 'project':67 'put':139 'realli':93 'replic':129 'report':108 'shield':10 'similar':5 'someth':134 'suffici':126 'suppli':42 'switch':40 'think':116 'though':23,56,68,103 'transistor':152 'type':150 'use':27,77 've':2 'way':47 'work':8,37,85,102,112 'would':45 'year':21"
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    +createdAt: DateTimeImmutable @1688058504 {#4255
      date: 2023-06-29 19:08:24.0 +02:00
    }
  }
  +nestedComments: []
  +level: 2
  +view: "tree"
  -entryCommentRepository: App\Repository\EntryCommentRepository {#558 …}
  -twig: Twig\Environment {#1252 …}
  -security: Symfony\Bundle\SecurityBundle\Security {#1101 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
}
settings_row_enum App\Twig\Components\SettingsRowEnumComponent 14.0 MiB 0.26 ms
Input props 
[
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  "values" => [
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowEnumComponent {#12750
  +label: "Sidebar position"
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      "value" => "LEFT"
    ]
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      "value" => "RIGHT"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.20 ms
Input props 
[
  "label" => "Dynamic lists"
  "settingsKey" => "KBIN_GENERAL_DYNAMIC_LISTS"
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#12814
  +label: "Dynamic lists"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.14 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#12879
  +label: "Rounded edges"
  +help: ""
  +settingsKey: "KBIN_GENERAL_ROUNDED_EDGES"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.14 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#12935
  +label: "Infinite scrolling"
  +help: "Automatically load more content when you reach the bottom of the page."
  +settingsKey: "KBIN_GENERAL_INFINITE_SCROLL"
  +defaultValue: false
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.18 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#12994
  +label: "Sticky navbar"
  +help: "The navbar will stick to the top of the page when you scroll down."
  +settingsKey: "KBIN_GENERAL_FIXED_NAVBAR"
  +defaultValue: false
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.13 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13050
  +label: "Show top bar"
  +help: ""
  +settingsKey: "KBIN_GENERAL_TOPBAR"
  +defaultValue: false
  +reloadRequired: true
}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.13 ms
Input props 
[
  "label" => "Turbo mode (experimental)"
  "settingsKey" => "KBIN_GENERAL_TURBO"
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13106
  +label: "Turbo mode (experimental)"
  +help: ""
  +settingsKey: "KBIN_GENERAL_TURBO"
  +defaultValue: false
  +reloadRequired: true
}
user_settings_row_switch App\Twig\Components\UserSettingsRowSwitchComponent 14.0 MiB 0.25 ms
Input props 
[
  "label" => "Mark new comments"
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]
Attributes 
[]
Component 
App\Twig\Components\UserSettingsRowSwitchComponent {#13164
  +label: "Mark new comments"
  +help: ""
  +settingsKey: "KBIN_MARK_NEW_COMMENTS"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.13 ms
Input props 
[
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  "settingsKey" => "KBIN_GENERAL_SUPPORT_US_BLOCK"
  "defaultValue" => true
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13227
  +label: "Show "Support Us" block"
  +help: ""
  +settingsKey: "KBIN_GENERAL_SUPPORT_US_BLOCK"
  +defaultValue: true
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}
user_settings_row_switch App\Twig\Components\UserSettingsRowSwitchComponent 14.0 MiB 0.16 ms
Input props 
[
  "label" => "Show subscribed users"
  "settingsKey" => "KBIN_SUB_CHANNEL_USERS"
]
Attributes 
[]
Component 
App\Twig\Components\UserSettingsRowSwitchComponent {#13285
  +label: "Show subscribed users"
  +help: ""
  +settingsKey: "KBIN_SUB_CHANNEL_USERS"
  +defaultValue: false
  +reloadRequired: true
}
user_settings_row_switch App\Twig\Components\UserSettingsRowSwitchComponent 14.0 MiB 0.15 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\UserSettingsRowSwitchComponent {#13341
  +label: "Show subscribed magazines"
  +help: ""
  +settingsKey: "KBIN_SUB_CHANNEL_MAGAZINES"
  +defaultValue: false
  +reloadRequired: true
}
user_settings_row_switch App\Twig\Components\UserSettingsRowSwitchComponent 14.0 MiB 0.15 ms
Input props 
[
  "label" => "Show subscribed domains"
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]
Attributes 
[]
Component 
App\Twig\Components\UserSettingsRowSwitchComponent {#13397
  +label: "Show subscribed domains"
  +help: ""
  +settingsKey: "KBIN_SUB_CHANNEL_DOMAINS"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.13 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13453
  +label: "Auto media preview"
  +help: "Automatically expand media previews."
  +settingsKey: "KBIN_ENTRIES_SHOW_PREVIEW"
  +defaultValue: false
  +reloadRequired: true
}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.12 ms
Input props 
[
  "label" => "Compact view"
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13509
  +label: "Compact view"
  +help: ""
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.15 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13565
  +label: "Show users’ avatars"
  +help: ""
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.14 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13621
  +label: "Show magazines’ icons"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.17 ms
Input props 
[
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]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13677
  +label: "Show thumbnails"
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.13 ms
Input props 
[
  "label" => "Auto media preview"
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  "settingsKey" => "KBIN_POSTS_SHOW_PREVIEW"
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13733
  +label: "Auto media preview"
  +help: "Automatically expand media previews."
  +settingsKey: "KBIN_POSTS_SHOW_PREVIEW"
  +defaultValue: false
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}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.14 ms
Input props 
[
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  "settingsKey" => "KBIN_POSTS_SHOW_USERS_AVATARS"
  "defaultValue" => true
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13789
  +label: "Show users’ avatars"
  +help: ""
  +settingsKey: "KBIN_POSTS_SHOW_USERS_AVATARS"
  +defaultValue: true
  +reloadRequired: true
}
settings_row_enum App\Twig\Components\SettingsRowEnumComponent 14.0 MiB 0.15 ms
Input props 
[
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  "help" => "Display the comment reply form either at the top or bottom of the page. When 'infinite scroll' is enabled the position will always appear at the top."
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  "values" => [
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      "value" => "TOP"
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      "value" => "BOTTOM"
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  "defaultValue" => "TOP"
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowEnumComponent {#13845
  +label: "Comment reply position"
  +help: "Display the comment reply form either at the top or bottom of the page. When 'infinite scroll' is enabled the position will always appear at the top."
  +settingsKey: "KBIN_COMMENTS_REPLY_POSITION"
  +values: [
    [
      "name" => "top"
      "value" => "TOP"
    ]
    [
      "name" => "bottom"
      "value" => "BOTTOM"
    ]
  ]
  +defaultValue: "TOP"
  +reloadRequired: true
}
settings_row_switch App\Twig\Components\SettingsRowSwitchComponent 14.0 MiB 0.13 ms
Input props 
[
  "label" => "Show Comment Avatars"
  "help" => "Display/hide user avatars when viewing comments on a single thread or post."
  "settingsKey" => "KBIN_COMMENTS_SHOW_USER_AVATAR"
  "defaultValue" => true
]
Attributes 
[]
Component 
App\Twig\Components\SettingsRowSwitchComponent {#13903
  +label: "Show Comment Avatars"
  +help: "Display/hide user avatars when viewing comments on a single thread or post."
  +settingsKey: "KBIN_COMMENTS_SHOW_USER_AVATAR"
  +defaultValue: true
  +reloadRequired: true
}
user_actions App\Twig\Components\UserActionsComponent 14.0 MiB 0.46 ms
Input props 
[
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    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#1518 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
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    +privateKey: null
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    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
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     …2
  }
]
Attributes 
[]
Component 
App\Twig\Components\UserActionsComponent {#13980
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    +cover: null
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    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#1520 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#1632 …}
    +entries: Doctrine\ORM\PersistentCollection {#1631 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#1704 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#1712 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#1468 …}
    +posts: Doctrine\ORM\PersistentCollection {#1659 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#1487 …}
    +postComments: Doctrine\ORM\PersistentCollection {#1767 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#1638 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#1492 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#1634 …}
    +follows: Doctrine\ORM\PersistentCollection {#1660 …}
    +followers: Doctrine\ORM\PersistentCollection {#1627 …}
    +blocks: Doctrine\ORM\PersistentCollection {#1419 …}
    +blockers: Doctrine\ORM\PersistentCollection {#1412 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#1453 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#1432 …}
    +reports: Doctrine\ORM\PersistentCollection {#1425 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1435 …}
    +violations: Doctrine\ORM\PersistentCollection {#1699 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1703 …}
    +awards: Doctrine\ORM\PersistentCollection {#1430 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#1595 …}
    +categories: Doctrine\ORM\PersistentCollection {#1645 …}
    -id: 269
    -password: "$2y$13$UYqaD7bZp4O.OwB02SlMIeKWP1aeHwuKf.UMqd1I/0STqvflxyU5K"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#1678 …}
    +apId: "Saigonauticon@voltage.vn"
    +apProfileId: "https://voltage.vn/u/Saigonauticon"
    +apPublicUrl: "https://voltage.vn/u/Saigonauticon"
    +apFollowersUrl: null
    +apInboxUrl: "https://voltage.vn/inbox"
    +apDomain: "voltage.vn"
    +apPreferredUsername: "Saigonauticon"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: false
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1709584336 {#1515
      date: 2024-03-04 21:32:16.0 +01:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686890246 {#1516
      date: 2023-06-16 06:37:26.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
}
date App\Twig\Components\DateComponent 14.0 MiB 0.15 ms
Input props 
[
  "date" => DateTimeImmutable @1688014108 {#1850
    date: 2023-06-29 06:48:28.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#14041
  +date: DateTimeImmutable @1688014108 {#1850
    date: 2023-06-29 06:48:28.0 +02:00
  }
}
magazine_box App\Twig\Components\MagazineBoxComponent 14.0 MiB 14.14 ms
Input props 
[
  "magazine" => App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  "showSectionTitle" => true
]
Attributes 
[]
Component 
App\Twig\Components\MagazineBoxComponent {#14097
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  +showCover: true
  +showDescription: true
  +showRules: true
  +showSubscribeButton: true
  +showInfo: true
  +showMeta: true
  +showSectionTitle: true
  +stretchedLink: true
}
magazine_sub App\Twig\Components\MagazineSubComponent 14.0 MiB 0.50 ms
Input props 
[
  "magazine" => App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
]
Attributes 
[]
Component 
App\Twig\Components\MagazineSubComponent {#14156
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
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    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
}
date App\Twig\Components\DateComponent 14.0 MiB 0.16 ms
Input props 
[
  "date" => DateTimeImmutable @1687144409 {#272
    date: 2023-06-19 05:13:29.0 +02:00
  }
]
Attributes 
[]
Component 
App\Twig\Components\DateComponent {#14268
  +date: DateTimeImmutable @1687144409 {#272
    date: 2023-06-19 05:13:29.0 +02:00
  }
}
user_inline App\Twig\Components\UserInlineComponent 14.0 MiB 5.44 ms
Input props 
[
  "user" => Proxies\__CG__\App\Entity\User {#14327
    +avatar: null
    +cover: null
    +email: "kbin@j0h.nl"
    +username: "Sprite_tm"
    +roles: [
      "ROLE_ADMIN"
    ]
    +followersCount: 0
    +homepage: "front"
    +about: "Hi! I'm Sprite_tm. You may know me from sites like https://spritesmods.com."
    +lastActive: DateTime @1707547382 {#14374
      date: 2024-02-10 07:43:02.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: true
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#7756 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#7759 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#8396 …}
    +entries: Doctrine\ORM\PersistentCollection {#8407 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#8398 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#8405 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#8400 …}
    +posts: Doctrine\ORM\PersistentCollection {#8403 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#9034 …}
    +postComments: Doctrine\ORM\PersistentCollection {#9037 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#9663 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#9670 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#9665 …}
    +follows: Doctrine\ORM\PersistentCollection {#9668 …}
    +followers: Doctrine\ORM\PersistentCollection {#10297 …}
    +blocks: Doctrine\ORM\PersistentCollection {#10300 …}
    +blockers: Doctrine\ORM\PersistentCollection {#10926 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#10941 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#10928 …}
    +reports: Doctrine\ORM\PersistentCollection {#10939 …}
    +favourites: Doctrine\ORM\PersistentCollection {#10930 …}
    +violations: Doctrine\ORM\PersistentCollection {#10937 …}
    +notifications: Doctrine\ORM\PersistentCollection {#10932 …}
    +awards: Doctrine\ORM\PersistentCollection {#10935 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#11658 …}
    +categories: Doctrine\ORM\PersistentCollection {#11663 …}
    -id: 1
    -password: "$2y$13$ZX7Aou2QOPRGkHPp4y5x8OWfxZMoT1BGH7bRLlPP7mwZFTkfiaPGG"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#11657 …}
    +apId: null
    +apProfileId: null
    +apPublicUrl: null
    +apFollowersUrl: null
    +apInboxUrl: null
    +apDomain: null
    +apPreferredUsername: null
    +apDiscoverable: null
    +apManuallyApprovesFollowers: null
    +privateKey: """
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      -----END PRIVATE KEY-----
      """
    +publicKey: """
      -----BEGIN PUBLIC KEY-----\r\n
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      -----END PUBLIC KEY-----
      """
    +apFetchedAt: null
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686560440 {#14375
      date: 2023-06-12 11:00:40.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
]
Attributes 
[]
Component 
App\Twig\Components\UserInlineComponent {#14345
  +user: Proxies\__CG__\App\Entity\User {#14327
    +avatar: null
    +cover: null
    +email: "kbin@j0h.nl"
    +username: "Sprite_tm"
    +roles: [
      "ROLE_ADMIN"
    ]
    +followersCount: 0
    +homepage: "front"
    +about: "Hi! I'm Sprite_tm. You may know me from sites like https://spritesmods.com."
    +lastActive: DateTime @1707547382 {#14374
      date: 2024-02-10 07:43:02.0 +01:00
    }
    +markedForDeletionAt: null
    +fields: null
    +oauthGithubId: null
    +oauthGoogleId: null
    +oauthFacebookId: null
    +oauthKeycloakId: null
    +hideAdult: true
    +showSubscribedUsers: true
    +showSubscribedMagazines: true
    +showSubscribedDomains: true
    +preferredLanguages: []
    +featuredMagazines: null
    +showProfileSubscriptions: true
    +showProfileFollowings: true
    +markNewComments: false
    +notifyOnNewEntry: false
    +notifyOnNewEntryReply: false
    +notifyOnNewEntryCommentReply: false
    +notifyOnNewPost: false
    +notifyOnNewPostReply: false
    +notifyOnNewPostCommentReply: false
    +addMentionsEntries: false
    +addMentionsPosts: true
    +isBanned: false
    +isVerified: true
    +isDeleted: false
    +isBot: false
    +spamProtection: true
    +customCss: null
    +ignoreMagazinesCustomCss: false
    +moderatorTokens: Doctrine\ORM\PersistentCollection {#7756 …}
    +magazineOwnershipRequests: Doctrine\ORM\PersistentCollection {#7759 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#8396 …}
    +entries: Doctrine\ORM\PersistentCollection {#8407 …}
    +entryVotes: Doctrine\ORM\PersistentCollection {#8398 …}
    +entryComments: Doctrine\ORM\PersistentCollection {#8405 …}
    +entryCommentVotes: Doctrine\ORM\PersistentCollection {#8400 …}
    +posts: Doctrine\ORM\PersistentCollection {#8403 …}
    +postVotes: Doctrine\ORM\PersistentCollection {#9034 …}
    +postComments: Doctrine\ORM\PersistentCollection {#9037 …}
    +postCommentVotes: Doctrine\ORM\PersistentCollection {#9663 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#9670 …}
    +subscribedDomains: Doctrine\ORM\PersistentCollection {#9665 …}
    +follows: Doctrine\ORM\PersistentCollection {#9668 …}
    +followers: Doctrine\ORM\PersistentCollection {#10297 …}
    +blocks: Doctrine\ORM\PersistentCollection {#10300 …}
    +blockers: Doctrine\ORM\PersistentCollection {#10926 …}
    +blockedMagazines: Doctrine\ORM\PersistentCollection {#10941 …}
    +blockedDomains: Doctrine\ORM\PersistentCollection {#10928 …}
    +reports: Doctrine\ORM\PersistentCollection {#10939 …}
    +favourites: Doctrine\ORM\PersistentCollection {#10930 …}
    +violations: Doctrine\ORM\PersistentCollection {#10937 …}
    +notifications: Doctrine\ORM\PersistentCollection {#10932 …}
    +awards: Doctrine\ORM\PersistentCollection {#10935 …}
    +subscribedCategories: Doctrine\ORM\PersistentCollection {#11658 …}
    +categories: Doctrine\ORM\PersistentCollection {#11663 …}
    -id: 1
    -password: "$2y$13$ZX7Aou2QOPRGkHPp4y5x8OWfxZMoT1BGH7bRLlPP7mwZFTkfiaPGG"
    -totpSecret: null
    -totpBackupCodes: []
    -oAuth2UserConsents: Doctrine\ORM\PersistentCollection {#11657 …}
    +apId: null
    +apProfileId: null
    +apPublicUrl: null
    +apFollowersUrl: null
    +apInboxUrl: null
    +apDomain: null
    +apPreferredUsername: null
    +apDiscoverable: null
    +apManuallyApprovesFollowers: null
    +privateKey: """
      -----BEGIN PRIVATE KEY-----\r\n
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      Cgb38EldyAVGjCzRGfhu9SNU9B03bg==\r\n
      -----END PRIVATE KEY-----
      """
    +publicKey: """
      -----BEGIN PUBLIC KEY-----\r\n
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      U45ZxOEnTM9GSbe2y48JSnUCAwEAAQ==\r\n
      -----END PUBLIC KEY-----
      """
    +apFetchedAt: null
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1686560440 {#14375
      date: 2023-06-12 11:00:40.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +showAvatar: true
}
related_magazines App\Twig\Components\RelatedMagazinesComponent 14.0 MiB 2.04 ms
Input props 
[
  "magazine" => "askelectronics@discuss.tchncs.de"
  "tag" => null
]
Attributes 
[]
Component 
App\Twig\Components\RelatedMagazinesComponent {#9198
  +limit: 4
  +tag: null
  +magazine: "askelectronics@discuss.tchncs.de"
  +type: "magazine"
  +title: "related_magazines"
  +refreshedRandom: false
  -repository: App\Repository\MagazineRepository {#334 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -twig: Twig\Environment {#1252 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
}
active_users App\Twig\Components\ActiveUsersComponent 14.0 MiB 0.25 ms
Input props 
[
  "magazine" => App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
]
Attributes 
[]
Component 
App\Twig\Components\ActiveUsersComponent {#12972
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  -userRepository: App\Repository\UserRepository {#603 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -twig: Twig\Environment {#1252 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
}
related_categories App\Twig\Components\RelatedCategoriesComponent 14.0 MiB 1.30 ms
Input props 
[
  "magazine" => "askelectronics@discuss.tchncs.de"
  "tag" => null
]
Attributes 
[]
Component 
App\Twig\Components\RelatedCategoriesComponent {#14378
  +limit: 4
  +tag: null
  +magazine: "askelectronics@discuss.tchncs.de"
  +type: "related"
  +title: "related_categories"
  +refreshedRandom: false
  -repository: App\Repository\CategoryRepository {#14379 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -twig: Twig\Environment {#1252 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
}
related_posts App\Twig\Components\RelatedPostsComponent 14.0 MiB 1.44 ms
Input props 
[
  "magazine" => "askelectronics@discuss.tchncs.de"
  "tag" => null
]
Attributes 
[]
Component 
App\Twig\Components\RelatedPostsComponent {#14449
  +limit: 4
  +tag: null
  +magazine: "askelectronics@discuss.tchncs.de"
  +type: "magazine"
  +post: null
  +title: "related_posts"
  +refreshedRandom: false
  -repository: App\Repository\PostRepository {#14448 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -twig: Twig\Environment {#1252 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
  -mentionManager: App\Service\MentionManager {#390 …}
}
related_entries App\Twig\Components\RelatedEntriesComponent 14.0 MiB 1.53 ms
Input props 
[
  "magazine" => "askelectronics@discuss.tchncs.de"
  "tag" => null
]
Attributes 
[]
Component 
App\Twig\Components\RelatedEntriesComponent {#14518
  +limit: 4
  +tag: null
  +magazine: "askelectronics@discuss.tchncs.de"
  +type: "magazine"
  +entry: null
  +title: "related_entries"
  +refreshedRandom: false
  -repository: App\Repository\EntryRepository {#271 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -twig: Twig\Environment {#1252 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
  -mentionManager: App\Service\MentionManager {#390 …}
}
support_us_block App\Twig\Components\SupportUsBlock 14.0 MiB 0.25 ms
Input props 
[]
Attributes 
[]
Component 
App\Twig\Components\SupportUsBlock {#14587
  +subject: ? App\Entity\Contracts\VotableInterface
  +url: ? string
  -twig: Twig\Environment {#1252 …}
  -cache: Symfony\Component\Cache\Adapter\TraceableTagAwareAdapter {#600 …}
  -requestStack: Symfony\Component\HttpFoundation\RequestStack {#1328 …}
  -partnerBlockRepository: App\Repository\PartnerBlockRepository {#14588 …}
}
featured_magazines App\Twig\Components\FeaturedMagazinesComponent 14.0 MiB 0.76 ms
Input props 
[
  "magazine" => App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
]
Attributes 
[]
Component 
App\Twig\Components\FeaturedMagazinesComponent {#14676
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  -twig: Twig\Environment {#1252 …}
  -repository: App\Repository\MagazineRepository {#334 …}
}