Re: Trio 9R-59D receiver problems.
My 9R59DS still has the original two core mains lead with a separate earth. The level of mains hum was always acceptable when using an external loudspeaker but not when using headphones. I found that almost all of the hum was induced in the output transformer due to the very close location of the mains transformer. Turning the o/p transformer by 90 degrees to the right produced a remarkable reduction.
John
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