Information about the high voltage transformer and the detecting circuits was not given in this project by Electronics Engineering. The Geiger valve is the critical component in this project.
In the figure we have a classic Clapp oscillator configuration for a frequency of a few tens of...
The circuit was found in the February 1992 Radio Electronics magazine. The scale can be changed by...
Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent...