This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the output power depends on the supply voltage. The power supply must be 30 V symmetrical.
We found this circuit in a Radio Electronics from February 1970. The frequency of 1,400 kHz in the...
This different power control circuit with SCR was obtained from a 1967 magazine. The SCR can be...
We found this circuit in a 70s Electronic Design documentation. The circuit uses general-purpose...