This 5 W transistor amplifier for the car was found in an English documentation from 1969. The transistors are from that time and the transformer is of a special type.
This circuit is from the 70s. The integrated circuit used is not common today and the supply is...
This project was found in a documentation from 1980. It is a central of sound effects, a simple...
This range is normally used in marine communications as indicated in the 1989 documentation. The...