I have a mf nu-vista m3 amplifier,the small preamp toroidal transformer had been blown(inside psu box).I have decided not to use the original toroidal transformer,i am thinking use two separate small toroidal transformers as replacement of the old transformer, (one's secondary is 9vac-0v another one's is71vac-0-71vac center- tapped).I found the secondary output voltage marked at the PCB circuit board,but i am not sure is this the actual voltages of the transformer secondary output? I have no idea where to find the replacement transformer with such special output voltages ,any suggestion?
