2. amps-preamps
  3. 1347156354

Amp hums in standby mode when TV is on

Hi, my Sherbourn 5/1500A power amp starts humming whenever the TV in the same room is operating. This occurs even when the amp is in its standby state, and also happens when using the amp(although you can't typically hear the humming at that point because of the sound from the speakers). What's more, as the image on the TV varies in brightness, the intensity of the humming/buzzing also varies. If the TV is off, the amp is dead quiet. I am assuming this is some kind of ground loop problem.

Should I try to plug the amp in with a "cheater plug"? There is a sticker on the back of the amp that indicates that the amp must be used with a grounded power cord.
mtrot
jea48
4,546 posts
 
Mtrot,

Send an email to member Gbart,
(Email address), sae2300@optimum.net

Explain your power xfmr mechanical buzzing problem to him.
Good chance he can help you solve it.
.
ddd1
261 posts
 
You might want to clarify whether your cable TV is actually connected to your audio system and whether the audio components (ie. your stereo) and video components (ie. your TV) are on separate circuits.
trelja
3,224 posts
 
Reminds me of that old joke about the guy who visits the doctor, and says, "Doc, it hurts when I do this." The doctor's reply, "Then don't do that."
unsound
7,336 posts
 
Don't forget the video and power cords. Component placement can be considered too.
gbart
290 posts
 
Jim, my e-mail address is sae_2300@optimum.net. You forgot the underscore. :)
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