This circuit is from a high voltage tube source. It does not include the filament voltage that must be supplied by a separate transformer.
This traditional oscillator uses two complementary transistors to produce low frequency signals....
May 2017 - This new Ricoh 4 A current device is now available from Mouser Electronics. The device...
This circuit for the 3.5 MHz band (80 meters) was found in an old radio amateur documentation. The circuit...