We found this circuit in a 1968 Electronics World. The transistors are from the era and information about the transformer was included. Transistors support current equivalents.
This Wheatstone bridge has a thermistor or NTC sensor, allowing the measurement of temperatures by...
As we have explored on this site many times, a 2N3055 without the cover works like a low yield...
We found this simple continuity tester in a 1995 documentation. It uses two LEDs to indicate...