Medium impedance stage (CB20563E)

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

10 W Amplifier (CB6158E)
This high quality circuit with complementary symmetry was found in an Electronics World of 1966....
Debouncer circuit (CB21620E)
This circuit uses only one NC75Z04 port from ON Semiconductor, but it can be implemented with...
Common Emitter Stage with Bipolar transistor (CB25634E)
This transistor-based circuit has good gain and high input impedance. It was found in the November...