Volume expander amplifier (T364E)

This circuit was found in the 1961 RCA tube manual. The circuit includes a power supply stage.

3A Power Operational Amplifier L165 (CB15138E)
The presented circuit has a voltage gain of 10 times. We find it in the SGS manual of integrated...
12V double regulator (CB8810E)
We found this circuit in a 1966’s General Electric documentation. The circuit uses diodes in...
5 W Darlington Amplifier (CB6177E)
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...