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Noisy mains

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Noisy mains

Postby Octopussy » Thu Jan 05, 2012 11:06 am

I'm renting/living in a dodgy old house - rent is cheap and it's a nice area to live. But the electric's in this place are noisy!

So, I was wondering what could be done about it! My thoughts are to use some kind of UPS for my audio stuff. Am I on the right lines?

I'm into recording electric guitars and my reamp box dun like the electricity and mt guitar amp doesn't like pedals and their power supplies. Also another part of the problem seems to be my RME USB soundcard. I don't think it's shielded and noise free like my Steinberg MR816. Another weakness is that I'm recording onto a laptop although I'm recording onto a bus powered USB3 hard drive.

What to do...
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Re: Noisy mains

Postby Octopussy » Fri Jan 06, 2012 7:55 am

Echo echo echo echo...
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Re: Noisy mains

Postby ef37a » Fri Jan 06, 2012 9:48 am

You are paying a utility company for an electrical supply and like any good or service it must be "fit for purpose". Furthermore, if the supply is as bad as you intimate it could well be unsafe as well!
I would also expect equipment of the quality of RME to be well proofed against modest mains noise tho' of course it might not be the interface that is at the root of the problem.

It is virtually impossible to diagnose noise problems at a distance and especially when those problems seem to be mains supply related the very first step should be to get a professional on site.

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Re: Noisy mains

Postby James Perrett » Fri Jan 06, 2012 10:34 am

I'm wondering whether it is a grounding issue rather than a noise issue? As Dave says, these things are very difficult to diagnose at a distance. You need to draw a diagram of exactly how things are connected up and which connection schemes seem to be noisy and which aren't. Every last detail is important when trying to fix a problem like this.

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Re: Noisy mains

Postby Exalted Wombat » Fri Jan 06, 2012 11:36 am

Octopussy wrote:I'm renting/living in a dodgy old house - rent is cheap and it's a nice area to live. But the electric's in this place are noisy!

So, I was wondering what could be done about it! My thoughts are to use some kind of UPS for my audio stuff. Am I on the right lines?

I'm into recording electric guitars and my reamp box dun like the electricity and mt guitar amp doesn't like pedals and their power supplies. Also another part of the problem seems to be my RME USB soundcard. I don't think it's shielded and noise free like my Steinberg MR816. Another weakness is that I'm recording onto a laptop although I'm recording onto a bus powered USB3 hard drive.

What to do...

First thing to do is unplug the power supply from your laptop and run on the internal battery. Does the noise go away?
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Re: Noisy mains

Postby Martin Walker » Fri Jan 06, 2012 8:47 pm

Exalted Wombat wrote:First thing to do is unplug the power supply from your laptop and run on the internal battery. Does the noise go away?

Aha, the classic ‘do you have a digital ground loop’ test :bouncy:

An awful lot of those get mistakenly diagnosed as noisy mains supplies :headbang:


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