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Likely source of hum (120 hz?) on one channel?
Likely source of hum (120 hz?) on one channel?
Downhome Upstate
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Downhome Upstate
Sr. Member
Posts:
289
Likely source of hum (120 hz?) on one channel?
on:
April 20, 2013, 04:11:12 AM
With or w/o input applied & regardless of source selected, I've got hum on one channel significantly louder than the other. What are the likely culprits?
"Too soon old;
Too late schmart"
The late Mr. Fox, Fox's Deli, Rochester, NY
Mike P.
Grainger49
Hero Member
Posts:
7175
Re: Likely source of hum (120 hz?) on one channel?
Reply #1 on:
April 20, 2013, 05:00:05 AM
Mike,
Did you short the inputs? 120 Hz should be from the power supply. But it should be both channels if it is the power supply. Maybe the power supply wires are routed such that they impress noise into the channel you have problems with.
Downhome Upstate
Sr. Member
Posts:
289
Re: Likely source of hum (120 hz?) on one channel?
Reply #2 on:
April 20, 2013, 05:26:54 AM
Thanks, Grainger. Nope, haven't used shorting plugs. I'll try moving the PS wiring around a bit. . .
"Too soon old;
Too late schmart"
The late Mr. Fox, Fox's Deli, Rochester, NY
Mike P.
Paul Joppa
Global Moderator
Hero Member
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5833
Re: Likely source of hum (120 hz?) on one channel?
Reply #3 on:
April 20, 2013, 06:23:04 AM
You didn't mention having adjusted the hum pot - just sayin' ...
Paul Joppa
Downhome Upstate
Sr. Member
Posts:
289
Re: Likely source of hum (120 hz?) on one channel?
Reply #4 on:
April 20, 2013, 07:48:42 AM
Hi, Paul. I did (adjust the hum pot, that is). What I didn't do was pay attention before my first post. It's not the amp. It's the Seduction
"Too soon old;
Too late schmart"
The late Mr. Fox, Fox's Deli, Rochester, NY
Mike P.
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