Stereo preamplifier (CB20654E)

We found this circuit in a Hands-on Electronics from 1985. The circuit is based on common operations and is powered by a simple source.

Positive to negative voltage converter (CB20998E)
This circuit was found in old Maxim documentation. Check the availability of the IC if you are...
Amplifier for ceramic capsule (CB9059E)
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....
100 W Inverter (CB13973E)
This circuit was found in the 1972 RCA Power Transistor Databook. Transistors can be replaced by...