Simple 1-tube receiver (T960E)

This 1V heater tube circuit was found on a Radio Craft from 1945. The circuit is for medium wave and can be used as a tuner.

Unijunction Triac Control (CB25861E)
This power control circuit was found in an article in the June 1995 Electronis Now magazine. The...
Light operated switch (CB8251E)
This circuit was obtained in a 80s RCA documentation. The circuit uses components from that time....
Relative Value Comparator (CB19483E)
This circuit compares the input voltages by providing an output according to the curve next to the...