This class B circuit was found in the 1960 Mullard transistor reference manual. Transformers are the critical components. The source is not symmetric.
This circuit is from an American publication from 1974. It, at the same time, limits the intensity of...
This two-relay circuit gives drive logic that is clear when analyzing the circuit. In the original...
12 V battery chargers provide higher unregulated voltage. With the regulator shown, obtained from...