The two circuits shown show how to obtain an SSB / CW control for receiving this signal top at a common receiver. The circuits were found in an old American manual from the 80's.
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...