We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has two integrated circuits, one of which is a preamplifier stage. The power supply must be dual.
This useful circuit is used to test the insulation of cables, appliances, leaks in high voltage...
This class B circuit was found in the 1960 Mullard transistor reference manual. Transformers are...
This circuit is from the American magazine that no longer exists Science & Electronics,...