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 circuit was obtained in an old American manual. The circuit is valid for any operational. The...
The oscillator of this circuit operates around 8 MHz, but the output will be at a frequency three times...
The circuit below was found in the March 1990 issue of Radio Electronics magazine. The circuit...