Test circuit with bridge (CB22530E)

This bridge-biased transistor test circuit measures gain in the range 0 to 300. Circuit is from Radio Electronics June 1952.

INA240 – Zero Drift Sensors Amplifiers (COM167E)
January 2017 - Through Mouser Electronics Texas Instruments is launching its new zero-drift...
Multiprobe (CB16590E)
This circuit can be used to test continuity or even semiconductors. We found the configuration in a 1987...
Water Level Alarm (CB12215E)
I found this circuit in an Electronics Handbook from 1989. The circuit can be assembled with a...