Austrovox Bass 150


Preamp Schematic

Power Amp Schematic




This one came to me in a far better condition than the De Luxe 50. The 470 Ohm screen resistors were burnt but measured ok (replaced them with wirewounds), and the last filter cap had such a leakage current that it had fried the 33k dropping resistor for the preamp stage. The rest was purely mechanical, like a loose handle, broken AC socket and 30 years' dirt.