Audio Booster (CB6181E)

This reinforcing stages from a 1960s documentation. No information is given about the transformer and the transistor admits equivalents.

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Fuzz (CB6711E)
This fuzz distortion circuit was found in old RCA documentation. Equivalent transistors may be...
Dwell Meter Gauge and Tachometer (CB22529E)
This circuit with transistors of the time was found in the magazine Radio Electroinics of June of...
Magnetic Phonocaptor Preamplifier (CB16663E)
Several versions of this circuit can be found on this website. This makes use of FETs that can...