look (discuss.tchncs.de)
![](https://kbin.spritesserver.nl/media/cache/resolve/entry_thumb/45/f9/45f9dc34350402a8e9210bd281a9cea7657deb29b809e6437aee651af2276c85.jpg)
Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification....
I bought a random cheap crystal oscillator off AliX. It was advertised as a “constant temperature crystal reference”....
I ran into this while taking geology courses at university, and the lack of attention to detail by the developers is frankly insulting....