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.

Magnetic Preamplifier (CB17072E)
This circuit with transistors from a 1995 publication. The circuit is powered by a voltage taken...
Step-adjusted power supply (CB8895E)
This 1.5 A circuit has the output voltages adjusted by a selector switch. We found it in a Popular...
Experimental VHT Generator (CB16471E)
We found this different configuration that uses a fluorescent lamp as a negative resistance device...