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Re: Non-toroidal Transformer Hum

Posted by CC on January 28, 2002 at 10:44:41:
Thanks for all your suggestions. I tried the easy thing first. I went to the fuse box and started powering off various parts of the house until the amp was the only thing left on. Disappointingly, the hum still hung on.
(Amongst many things to be careful of while powering off the house, if you have gas heaters at home with pilot lights, the lights may go off when there is no power and it may not come back on when you power it back up.)
My next attempt is to put in a DC filter in the power path. Watch this space. If it doesn't work, I will resign to the fact that the fault lies in the transformer which is surprising as it is of a reputable make.