This circuit was found in a 1967 documentation. The switch diode is a component of the time and is difficult to find today.
This converter converts signals from the 50 MHz band to the AM band, making it possible to receive...
This circuit, from a 1987 documentation, is for the CB3817E transmitter. Connected to the handset...
The output of this circuit can be a crystal phone or a piezoelectric capsule. The circuit tests the...