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.
The operational used in this common configuration is a double 741. The circuit can be used to...
The two-channel mixer shown in the figure is the ideal solution for cases where we need an...
This circuit is from an English publication from 1965. The transistors used are rare, however, they...