This dual-tuned 60 Hz oscillator was found in the Radio Experimenter Special projects of 1993. The circuit has the timing ranges given by C1 which can be changed.
The timing steps of this circuit are indicated by a 7-segment display. The circuit was found in...
We found this circuit in a 90s Radio Electronics. The secondary current of the 110 or 220 V...
We found this circuit in a book on espionage from the 90s. The circuit has a counterphase...