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 was found in an old publication about transistor. The original trasistors are...
This high quality circuit with complementary symmetry was found in an Electronics World of 1966....
This circuit allows the recovery of tapes with the passage of this media to the computer and other...