Transistor gain meter (CB20522E)

This circuit was found in a publication in the 1950s, mainly applying to germanium transistors of the time.

Fahrenheit Bargraph Thermometer LM34 (CB14403E)
The thermometer presented, for the Fahrenheit scale, is from the Linear Applications Handbook of...
Compressor Limiter (CB13689E)
The purpose of this circuit is to improve the dynamic range of ambient sound systems, preventing them...
Dynamic Power Transistor Tester (CB17592E)
This circuit consists of a test oscillator for medium and high power NPN transistors. For PNP,...