This control circuit up to 1 kW was found in a 1967 RCA documentation. The components are from that time, and modern equivalents can be used.
This circuit shows how to use a PNP transistor to drive a load from 500 mA to 1 A, depending on...
This circuit was found in the February 1992 issue of Radio Electronics magazine. The circuit...
This tube circuit is from an 80's documentation. The filter is of the selective type and the...