The circuit shown, with the printed circuit board, was found in an article in the June 1990 issue of Radio Electronics magazine. Integrated circuits must be equipped with heat sinks.
This circuit was suggested by Motorola in a 1980s publication. It is based on a PUT that is not a...
Found in American documentation from the 70s, this circuit uses components of the time, uncommon...
This is an old circuit, but totally viable and with excellent sound quality. BD transistors must...