Medium impedance stage (CB20563E)

We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the time.

True RMS Meter (CB24789E)
This circuit with an integrated circuit of the time was found in the magazine Radio Electronics of April...
Converter Stage of a Transistor Radio (CB937E)
This is a converter stage found in old transistor superheterodyne radios. The circuit is for...
Amplifier LM380N (CB19309E)
In its original version of a 70s manual, this integrated amplifier, which is uncommon today, was...