Push pull amplifier (CB21941E)

Using a pair of CK722s, this booster step of a few milliwatts of power was obtained in a 1960 Gernsback publication.

Signal tracer (CB23671E)
This 4-transistor signal tracer or follower was found in Radio Electronics magazine from May 1960....
Sound effect (CB9213E)
This sound effect circuit uses only one integrated. We found it in a 90's EDN. The effects can be...
Triac Dimmer (CB24124E)
This is one of many power control or dimmer configurations that we have found on this site and in...