This NEC commercial amplifier was manufactured in Japan in the 1960s. The circuit uses 4 transistors from the time and was powered by a 9 V battery voltage formed by large batteries.
This circuit is in the SGS manual of linear integrated circuits of 1982. The integrated circuit is of...
This circuit sends its signals to short wave receivers and even FM outside stations placed nearby. As...
This simple VU (Volume Units) or volume indicator for amplifiers was obtained in an English...