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.
We find this circuit in a 1994 technical documentation. The circuit has a 12 V input and a 33 V...
This 80's circuit uses an integrated amplifier of the era, but nothing prevents it from being...
Found on a 1965 Radio Electronics, this circuit fires a signal xenon lamp applied to the SCR from...