Transistor breakdown (CB21393E)

This inverse transistor breakdown circuit was found in a 1967 documentation. It applies to modern components.

Rectangular Signal Generator (CB3954E)
In the figure we have a good rectangular signals generator with several frequency bands. The...
Powerless Radio (CB23700E)
We found this circuit in a Radio Electronics from February 1966. The circuit uses a germanium...
Cascading voltage multiplier (CB9443E)
We found this circuit in a 90s Radio Electronics. The secondary current of the 110 or 220 V...