Geiger counter with high voltage source (CB22333E)

This circuit includes a high voltage inverter to power a Geiger tube. We found it in an American documentation from the 60s.

Inverter Amplifier with Arbitrary Reference (CB19844E)
This circuit was obtained in a Motorola manual, but it applies to almost any operational...
Circuit contact protection with relay (CB8634E)
Found in a 1990s Motorola documentation, this circuit aims to protect a triac that drives an...
1 W Amplifier with the TAA300 (CB6164E)
Found in a 1968 documentation, this small amplifier was very popular at the time being used in...