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.

26 V x 15 A Voltage Regulator (CB12839E)
This circuit was obtained in an Argentine publication in 1976. It consists of a series voltage...
Crowbar for power supply (CB8367E)
This protection circuit was obtained in a 1969 Electronic Design. The SCR can be the current...
Transistor voltmeter (CB23631E)
With this circuit published in Radio Electronics magazine in September 1959, it is possible to use a...