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 values of the components of this Mullard (Philips) circuit depend on the desired voltages. The...
Found in an English publication from 1977 this audio amplifier provides an output of a few...
This reducer was found in documentation from the 1980s, using transistors of the time. The higher...