Rectangle shaped 220V AC from 12V DC. The transformer is primary 9-0-9 secondary 220V. Couldnt get it to completely stabilise but should work fine in real life depending on purpose (amplifiers yes lamps yes some worktools maybe ) but above 100W it wont do you any good because thats about the maximum of the last transistors (2n3055). You could easily get it to work at higher power by just adding a fem more 2n3055 transistors in parallel with the ones already in the circuit.
