This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be done based on transistors with known gains.
The transformer inf this circuit is a 6 or 9 V unit and diodes 1N4002. The filter capacitor is 2...
This handy instrument on the maker's bench that does not have a multimeter yet serves to test...
This two-transistor amplifier stage has a feedback network allowing a voltage gain between 10 and...