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.

Narrow Pulse Sensor (CB21508E)
Found in a 1967 Electronic Design, this circuit can detect pulses as narrow as 0.2 us. Active...
Transistorized LC Oscillator (CB24028E)
We found this circuit in the May 1970 issue of Radio Electronics magazine. The maximum frequency...
555 Dual LED Flasher (CB24844E)
This flasher was found in the September 1984 Radio Electronics magazine. The frequency is given by...