Placed near a common receiver, this oscillator is intended to generate a beating signal to receive RTTY or SSB communications. The circuit is from old telecommunications documentation.
This sensitive circuit detects the live pole of a power grid or outlet. The circuit makes use of a high...
We found this circuit in a 1980s publication for amateur radio. It consists of an audio amplifier...
This circuit uses a General Electric coupler from the time of the publication in the 1980s....