This source for 50 W amplifiers per channel was found in 1967 Delco documentation. Transistors are from that time, difficult to obtain today.
This circuit was found in an American 1980s documentation. The components are current but most...
This circuit was found in an old GE SCR manual. The SCR must be in accordance with the relay and...
This circuit measures millivolt voltages. The corresponding current range of the multimeter can be...