This circuit was published in Radio Electronics magazine in June 1959. The circuit uses an inverter with transformer to generate the high voltage of the Geiger tube.
This circuit was found in a 1970s General Electric documentation. This circuit already used an...
A rectangular signal can be generated with the figure setting. The values given in the circle...
This circuit was obtained in an old publication. The FET can also be the BF245. The potentiometers can be...