A 74xx-defined Radio (acidbourbon.wordpress.com)
A shortwave radio receiver from scratch using only cheap and easily available components, i.e. standard transistors, op-amps and 74xx logic chips. No typical radio parts – no coils, no variable capacitors, no exotic diodes.
![](https://kbin.spritesserver.nl/media/cache/resolve/entry_thumb/44/80/448040ca62c6e5c2f3886ca8d933999665da9e57aeac1b13f653bd4852b2d23b.png)