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 electronic flash circuit was found in the March 1961 Radio Electronics magazine. The circuit...
We found this circuit in a 1990 documentation. It is totally up to date by the components it uses...
This is a special circuit with very interesting effects, which can be added to electronic games,...