Found in 1970s General Electric documentation, this circuit uses period components to control a 12 V motor. Transistors support modern equivalents according to the controlled motor.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We found...
Other versions exist on this site from various publications. This one is from the Radio...
This circuit was found in a 1980s US publication. There may be some difficulty in obtaining the...