We found this circuit in a 1968 Electronics World. The circuit uses a transistor of the time providing a 16 dB signal gain with a 4 V output.
This high-gain circuit uses junction FETs (JFETs) and must be powered by somewhat high voltages. The...
This circuit counts 1 per second, displaying the value in binary. The circuit is TTL and must be...
Critical components of this project are the Geiger tube and the 300V battery. The battery can be...