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.
As part of a larger project, we found this modulation meter in the August 1994 Electronics Now...
This FM receiver tuning step circuit was found in a 1960 documentation. No information about the...
This circuit was found in the December 1993 issue of Electronics Now. With the components shown the...