Broadband amplifier (CB9179E)

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

2 transistor radio (CB20517E)
This circuit with germanium transistors was found in documentation from the 50's. The transistors are...
Old Phase Shift Oscillator (CB13956E)
The circuit presented was found in a documentation from the 1950s, generating a sinusoidal signal...
VHF Preamplifier (CB19599E)
This circuit was originally indicated as a signal reinforcement step for the previous receiver...