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.

Basic Voltmeter (CB391E)
This circuits shows how to use in operational amplifier as a basic voltmeter. Power supply must be...
Reinartz Oscillator (CB25318E)
The coils determine the frequency of this oscillator that we found in the January 1996 issue of...
Dolby noise reducer (CB21105E)
This circuit was found in a National Semiconductor Handbook from the 1990s. The integrated circuit...