Bass control (CB8722E)

Found in a 1993 Electronics Hobbyst Handbook, this passive circuit can be used with common preamplifiers and amplifiers.

Transmitter with tunnel diode (CB23519E)
We found this circuit in a 1963 Radio Electronics. It can be used for remote control. The...
Deceive Thief (CB18609E)
We present a circuit for those who want to give the impression that there are people at home when...
AM Transmitter (CB513)
This small transmitter can act as a wireless microphone operating in the medium wave range,...