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 Maxim documentation from the 1990s. The RC circuit determines the...
This Vienna bridge multi-band oscillator circuit was found in a 1974 Ferranti transistor manual. The...
This circuit can be used as a shield to control the matrix flow of 100 LEDs from a single output of...