Mini Organ (CB21653E)

This toy organ was found in Popular Electronics from January 1967. It can be constructed from modern equivalent transistors.

Photo Electric Relay (CB9889E)
We found this circuit in an English documentation from 1979. The circuit can be implemented with a...
Power Supply Protection (CB18175E)
This relatively simple protection circuit trips a source in the event of a short. The additional circuit...
27 MHz Band Linear Amplifier (CB17010E)
With the used coils and the power transistor this circuit amplifies the 5 W of a 11-meter...