This circuit was found in a 1967 US documentation. The FET is general purpose and the 6V zener. The circuit has a very fast switching action.
This converter was found in the June 1991 issue of Radio Electronics magazine. The circuit uses...
This two-transistor amplifier stage has a feedback network allowing a voltage gain between 10 and...
This circuit was found in a 1967 RCA documentation. The components are of the time. The circuit...