Double flip the switch to start. Ive remade it and made a little oscillator to introduce complex signals for amplification. The power Transistors are IRF530 and IRF9530 or MTP12N10 and MTP12P10 and the bjt transistor is BC550C. It can deliver 20W to 4ohms and 12.5W to 8ohms nominal and even more if 40V regulated DC and sufficient input signal are applied.
