This circuit was found in an American 1980s documentation. The transistorized step is the receiver's last IF and the diode is the receiver's existing detector.
This circuit was obtained from a 1971 Electronics Hobbyist. The circuit can still be mounted using...
Damped sine oscillations can be produced when short pulses are applied to the input of this...
In the figure we have the circuit of a sweep generator obtained in an old publication. The central...