This 4-tube amplifier with 6W of output was found in an American manual from 1947. The sound quality is excellent.
This circuit is from an Electronics World of 1967. The circuit slows down the activation of a...
This circuit was obtained from a Popular Electronics of the 90's. Any power MOSFET can be used as...
The integrated circuit used in this project is uncommon and so are the transistors, but they can...