Noisy transformer Usher R1.5

david foster · 13th January 2010, 03:34 PM

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

StevenOH · 13th January 2010, 04:15 PM

It might be that the wall AC voltage is higher in your new location (relatively to the number of the primary turns).

13th January 2010, 03:34 PM	#1
david foster diyAudio Member Join Date: Dec 2009	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

13th January 2010, 04:15 PM	#2
StevenOH diyAudio Member Join Date: Jun 2004 Location: USA	It might be that the wall AC voltage is higher in your new location (relatively to the number of the primary turns). __________________ The truth is out there. Who can handle the truth?

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