We had found this circuit in a January 1961 Radio Electronics Magazine. Using it is possible to take measures from the gain of transistor with a common a multimeter.
We found this circuit in an Electronic Engineering of the 90s. The circuit can be implemented with any...
This circuit from Radio Electronics from February 1983 shows how to use a clock radio in home...
This configuration with the LM111 was found in your factory manual. The circuit can be implemented with...