This direct coupled circuit operates in class AB with good gain. The circuit is powered by 12 V. We found it in a Radio Electronics from October 1963.
This configuration appears elsewhere on this site. We obtained it from a 90s Radio Electronics, based...
This circuit tests the reverse voltage of power diodes. The transformer is high voltage and so are...
We found this circuit in a 1995 documentation. It can measure frequencies from 100 kHz to over 100 MHz...