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.
June 2016 - It can be purchased from Mouser Electronics the TAS5720x the evaluation module from...
Found in an old American publication, this circuit is intended for audio experiments. The...
This circuit was found in a 1995 documentation and is very simple to assemble, as the components are...