Inverter Amplifier (CB6431E)

This high input impedance circuit was found in a Popular Electronics of the 90s. The circuit supports modern operational.

Gemanium Transistors Wien Bridge Oscillator (CB14768E)
The frequency of this oscillator, found in the 1960 transistor reference manual, is around 3.5...
Protected voltage regulator (CB8359E)
Suitable for 12.6 V voltages at the output and currents of 2 A, this circuit was found in a 1965...
Solar panel charger (CB7265E)
Suggested by National Semiconductor in documentation from the 90s, this circuit uses a switched...