This circuit was obtained from an American publication of 1982, but can be easily assembled today with the adaptations we have made, in the sense of using more modern components. Transistors must be mounted on excellent heatsinks. The power supply is ideal for automotive sound power or communication equipment in the test bench or repair. The integrated circuit must also be fitted with a radiator. The selector switch, which is difficult to obtain, can be replaced by separate keys or switches, which must always be activated one at a time. Thick wires according to the chain should be provided in the assembly, especially at the source outlet.
