Found in an American publication from the 1980s, this circuit can be found in commercial sound equipment of the time. The list with the component values is given next to the diagram.
This amplifier uses hybrid modules Sanken and can provide powers of 10 W or 20, depending on the...
This circuit was suggested by Signetics in 1980s documentation. The circuit makes use of the...
The drive levels of this shield are opposite to the previous one. The photo-transistor can be of...