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.

Battery Monitor TLV379 (CB20385E)
This battery monitor circuit with the TLV379 low voltage operational amplifier was obtained in the...
Red Alert (CB12179E)
We got this circuit from Radio Electronics from July 1990. The circuit mimics the sound of the red...
100 kHz Crystal Oscillator (CB4853E)
This configuration often addressed on this site is from a 2000 documentation. The circuit can be...