This SCR circuit can operate on frequencies from 1 to 20 kHz. We found it in an American documentation from the 60's. The SCR must be according to the load. No information is given about the transformer.
This circuit was found in Electronics Today International of the 80's. The circuit uses still...
Found in an Electronic Design, this circuit is intended to produce signals in the VHF band. The...
This circuit uses a not easy to find IC these days. The circuit sources 15 W to a 4 ohm load and...