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Humming from Amp with/without input
Humming from Amp with/without input
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Old 19th October 2011, 10:53 AM   #11
Enzo is offline Enzo  United States
diyAudio Member
Join Date: Sep 2004
Location: Lansing, Michigan
Oh, my apology, not a Vox AD30 at all, it is an Orange AD30.

I'd agree with Nigel then, in the humming channel, since there appears to be a level control after each stage, which ones will turn down the hum. That will localize the source.
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Old 21st October 2011, 05:18 AM   #12
Mantua404 is offline Mantua404
diyAudio Member
Join Date: Oct 2011
ok I have actually said it the same from the beginning but I can see where my wording could confuse... The amp sounds and plays perfectly fine on all channels...

HOWEVER, a normal amp when the jack is unplugged should go dead silent... so if the amp is turned up full blast it should be silent if no input is plugged in.

On channel 2 it does go dead silent with no input which it always has and it should

HOWEVER, channel 1 has recently started humming as if an input was still plugged in even when there is no input.

I hope I worded that correctly this time. sorry for any confusion
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Old 3rd June 2012, 12:57 PM   #13
Charly1 is offline Charly1  Australia
diyAudio Member
Join Date: Apr 2012
Hi Gents I got a different experience I build class A amp and when there is no input on input RC absolute no Hum.. As soon as input connected Hum start. Any Idea?
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