This is the receiver circuit for the previous transmitter. The circuit has a programming key to decode the signals. This key must have the same transmitter code.
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
This oscillator for frequencies up to a few tens of kilohertz was found in a 1970s documentation. The...
This varicap-less modulator circuit was found in an Electronic Design from the 90's. The circuit...