Broadband amplifier (CB9179E)

Found in an old Popular Electronics, this circuit has a gain of 20 dB. The integrated circuit is uncommon today.

Transistor breakdown (CB21393E)
This inverse transistor breakdown circuit was found in a 1967 documentation. It applies to modern...
High Gain Amplifier with 2 Transistors (CB25640E)
This circuit was found in the November 1993 issue of Electronics Now magazine. It uses...
Phonographic amplifier (CB8248E)
This small phonographic amplifier was found in a 1967 General Electric documentation. The...