Found in an old American documentation this FM modulator makes use of a varactor diode. The circuit can be easily implemented given the small number of components used.
This circuit is from an 80's documentation, firing when the input voltage exceeds 5 V. The SCR can...
This circuit was found in the 1989 Radio Electronics Experimenter edition. The circuit has the...
This basic circuit can be used in signal followers and other applications where an RF signal is to be...