Found in an old publication, this is a transmitter with a spark coil. The high frequency oscillations of the high voltage spark generate the signal thrown at the antenna.
This circuit is from an old technical documentation from Spain. The circuit uses a FET that is...
Using transistors at the time, this circuit was found in a 1967 Ferranti documentation. The...
This circuit is from a thyristor manual from On Semiconductor. It makes use of a PUT and a SCR...