This circuit was found in an ancient American documentation. With it is possible to double the frequency of a transmitter For the range of 6 meters obtaining 8 W. The circuit makes use of varicap.
This simple circuit is powered by the logic circuit itself. Components are still common, although...
In the figure we show how two diodes can be used to simulate the center tap of a push-pull driver step....
This voice scrambler circuit was obtained from an American 1990s documentation. Used operational...