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.
In the figure we show a way to change the output voltage of a fixed regulator, such as 7805 or...
This circuit is from an old American publication, using transistors of the time and operating with a 48...
This control, which may appear in other versions on this site, was found in documentation from the...