This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
This simple circuit for an audio link uses a lamp, which has a very poor frequency response, but...
Frequency in this oscillator is given by C1 and C2. The circuit produces square pulses that can...
This circuit was found in an American 1980s documentation. The circuit can be digitally programmed...