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Amplifier humming

Hi,
I am Gnana Sekhar Thompson from Inida. I have an Electrocompaniet AW250 DMB Power Amplifier. A slight HUM comes from the Transformers (650 VA Toroidal). The speakers are dead silent. I need your guidance in this matter. I am much worried. Please let me know the options to correct this problem. Please spend your valuable few minutes to help me. Is it advisible to change the transformers? Will it affect the sound quality? Thanks.
gnanasekhar
gnanasekhar OP
48 posts
 
Hi,
I'm extremely sorry. I have left out one more complaint. While playing the sound stops for a second. This happens three or 4 times in a hour of continuous playing. Thanks,,,,,,,
gnanasekhar OP
48 posts
 
Hi,
I am eagerly waiting for your advice. Thanks.
xti16
1,525 posts
 
Are you sure it is the amp and not the source or pre amp?
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tonykay
1,298 posts
 
FWIW, I bought a McIntosh preamp here on Audiogon that had a slight, but audible, hum that did not affect the speakers. Someone on this forum suggested that I replace the hard feet with sorbothane ones, which helped a little. I noticed that when I lifted the preamp the sound stopped completely, so I loosened the screws that hold the cover down. Surprisingly, it is now silent. Can't hurt to try it!
clio09
3,345 posts
 
I owned this amplifier several years ago. It is actually a very good amp. Mine also had the transformer hum. Unfortunately it was not due to DC on the line. To solve the problem I removed the transformer fastener and put some damping pads under and on top, then refastened it. This helped quite a bit. Unfortunately I cannot help with your other issue.
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