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 intended for carrying out experiments with solar cells. The circuit is from a 1991...
This typical two-transformer push-pull step circuit can be found on many small old radios and...
This microtransmitter operates at a frequency between 3.5 MHz and 10 MHz determined by the...