Page 1 of 1

orange ad30tc low hum noise

Posted: Wed Sep 12, 2018 7:03 am
by dodomoon78
Hi, i've got an ad30tc since 2005. In these days I noticed a low hum noise when I switch on the amp, even if there is nothing plug into it. It comes from the amp, not from the speakers... I know that every tube amp has a background noise caused by transformers, but now it seems to me more louder. it's not louder than the sound when I play, and the hum remains at the same volume independently from the volume of the amp.
I have a doubt... has the amp some issue, or am I become more susceptible to noise cause i play at very low volume nowadays?
The tubes are new, a couple of months old.
Maybe someone with the same amp can test how many db of noise it makes when switched on and with nothing plugged in? I have a couple of apps in my iphone that can measure db.

thank you

Re: orange ad30tc low hum noise

Posted: Mon Sep 17, 2018 10:18 pm
by Farrerdale Records
Thanks for posting, I'd like to know the answer as well

Re: orange ad30tc low hum noise

Posted: Mon Sep 17, 2018 11:06 pm
by bclaire
How loud? Sounds like it may have always been there but you're just noticing it now.

Change gain and/or volume settings and see how that is...