27 MHz Oscillator (CB24983E)

This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low supply voltage.

RIAA Transistor Amplifier (CB19171E)
This circuit, from the 90's, is intended for operation with vinyl record players of the time, as...
Watch Battery Rejuvenator (CB17070E)
This circuit, in fact, what it does is a reactivation of the batteries through a brief pulsating...
Fast Peak Detector (CB14063E)
This circuit, for signals up to 1 MHz, is based on an RCA operational amplifier. The circuit was...