This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The circuit controls the signals of medium frequencies in a wide dynamic range as shown in the diagram.
The power transistors of this 80's circuit should have at least 10 A current collector and mounted on...
The critical component of this circuit is the transformar. We found it in an 1980s documentation....
This circuit is from an Italian publication called Fare Elettronica from 1987. What we have is an...