fethiyeli
Full Member level 4
A simple explanation for excessive magnetizing current is that a 220V transformer isn't designed for 30% overvoltage. But you should also verify that the amplifier doesn't show parasitic high frequency oscillations.
I have checked during the testing and there was no parasitics at that time but i dont remember how much current transformer draws when the output is 220V. It should be pretty lower than when the output is 265V. Eventhough, magnetising, no load current must be negligible in value.
So, even using secondary 3V as primary, magnetising current should be negligible as i understand.