Complementary symmetry stage (CB22237E)

We found this step in an old documentation. The transistors are of the time and the power supply symmetrical.

Siren Sound (CB23943E)
This circuit generates a siren sound. It was found in the April 1969 Radio Electronics magazine. The...
Analog Tachometer (CB1366E )
This circuit converts pulse frequency to current, which is indicated on an analog instrument. The...
Negative Bias Source (CB10923E)
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...