This 6W amplifier with 4 tubes was indicated in an American documentation from 1947 to operate with recorders. The circuit uses a source with a transformer.
To use the instrument for AC measurement, the tips are A and B. For CC use tips A or B for...
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...
This power supply was found in the December 1993 issue of Electronics Now magazine. Power...