For an 8 ohm load, this Motorola circuit was found in a 1968 documentation. The transistors are of the time and the power supply must be symmetrical.
Found in Radio Electronics from the 90s, this circuit uses components from that time. However, it...
Using a CA3059 this circuit was found in the July 1995 Electronics Now magazine. The triac must be...
April 2017 - Mouser Electronics already has in stock the Texas Instruments' new TPS54418A...