This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be done based on transistors with known gains.
This amplifier was obtained from the CA3140 datasheet, an operational amplifier with JFET at the...
The circuit shown in the figure can act as a home repeater for AM signals from the output of an...
I found this circuit in an English magazine from July 1982. The circuit is still viable because all...