This is a diagram of a 1970s reel or tape recorder. It is an Italian Geloso recorder, quite popular at the time. The circuit is a reference for equipment recovery.
This configuration, found several times on this site and in other articles, can generate...
July 2017 - Texas Instruments' new bidirectional current controllers LM5170-Q1 for power...
This circuit was found in a 1973s Japanese publication. The power transistors used are of the era...