This circuit for communications receivers was found in the January 1974 issue of Radio Electronics magazine. The transistors are Japanese types of the time, as the circuit was part of equipment of that origin.
This circuit includes a high voltage inverter to power a Geiger tube. We found it in an American...
This circuit generates a signal up to a few megahertz depending only on the LC resonant circuit...
With the CMOS circuit shown, rectangular signals up to a few megahertz can have their frequency divided...