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.
This three-transistor amplifier uses a JFET at the input to increase the input impedance. The...
We found this simple mixer in a 90s Radio Electronics. The used FETs are still common. The inputs...
This circuit was published in an Italian magazine Radio Elettronica in February 1976. The...