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 found in Siliconix documentation from the 1980s. Equivalent operational...
We found this dynamic tester for transistors with variable collector current in a publication in...
This circuit found in Popular Electronics from July 1974 consists of an oscillator that sends its...