Ripple Filter (CB6724E)

This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according to the desired output voltage and current.

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Noise Generator (CB7078E)
Published in Popular Electronics with the curious name of Obnoxious Noisemaker, this 1968 circuit...
RIAA Equalizer Amplifier (CB25696E)
This preamplifier circuit for turntable cartridges was found in the March 1994 issue of...
Vdeo cable driver (CB20922
E) This circuit was found in documentation from the 1980s. The integrated circuit used is not very...