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.
Found in Motorola's 1967 documentation this circuit can use any general-purpose transistor. The signal...
This 80's circuit uses a light-sensitive SCR or LASCR and a one-sided silicon switch SUS, uncommon...
This circuit was found in an American 1980s documentation. Dual FETs can be replaced by single...