We found this circuit in a Japanese publication in 1967. The circuit consists of a 15 W audio amplifier with germanium transistors including a voltage indicator power supply.
This circuit, which appears elsewhere in this section but from other sources, was found in a book...
The FET of this circuit of a 1971 publication may be the BF245. The circuit serves as a voltage...
This circuit uses an operational that is not currently common. We found it in an old American...