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Old 13th January 2010, 03:34 PM   #1
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Default Noisy transformer Usher R1.5

I have an Usher R1.5 power amp with a noisy transformer. We just moved and the hum from transformer seems to have gotten louder I don't know if it's just the acoustics of the new room, I never really noticed the hum in the previous location. Is this typical of these amps? The amp seems to perform fine otherwise. I took a look inside and the transformer is bolted down securely. It starts humming as soon as it is turned on even with nothing connected, grounded and not gounded? Any cure for this
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Old 13th January 2010, 04:15 PM   #2
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It might be that the wall AC voltage is higher in your new location (relatively to the number of the primary turns).
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