This transistor tester with different gain ranges was found in documentation from the 1980s. The circuit can still be implemented with more modern components and used with general purpose transistors.
This configuration was obtained in a 1977 FET Databook. The circuit can be practically any JFET...
This circuit was found in an old American documentation. The transformer is of the type found in...
This circuit was found in an English publication from 1989. The integrated circuits are of the...