Ground Loop? - Jemsite
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post #1 of 7 (permalink) Old 08-29-2007, 01:12 AM Thread Starter
 
Join Date: Nov 2006
Location: Stockton,Ca
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Ground Loop?

What is it?

Here's a video on youtube i found showing someone wiggling the cable or something.

http://www.youtube.com/watch?v=B3QjqHtcb1Q
LethalAe86TypeR is offline  
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post #2 of 7 (permalink) Old 08-29-2007, 01:52 AM Thread Starter
 
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Re: Ground Loop?

Any help?
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post #3 of 7 (permalink) Old 08-29-2007, 02:17 AM
 
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Location: Canada, Vancouver
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Re: Ground Loop?

I don't have that problem with my g-system, sorry.
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post #4 of 7 (permalink) Old 08-29-2007, 02:32 AM
eg
 
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Re: Ground Loop?

What causes ground loops anyways?
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post #5 of 7 (permalink) Old 08-29-2007, 06:18 AM
 
Join Date: Feb 2001
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Re: Ground Loop?

Ground loops occur when there is more than one ground connection path between any two points in your guitar wiring.

The most common ground loops found in guitars are where the pots cases are connected by a ground cable and also by the shielding of the electronics cavity. If the shielding is conductive (copper, aluminium, steel etc etc) then ground connections between pots produce ground loops.

When you have multiple ground paths pot to pot and to the ground on the output jack they act like an antenna antenna which very efficiently picks up interference. Because of the innate resitance differences between the different ground loops you end up inducing mini currents in the ground system and outputting those mini currents as noise in your signal.

Just remember there should never be more than one connection to ground for any idividual bit of kit (pot, switch, trem-claw etc)

hope this helps

Steve
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post #6 of 7 (permalink) Old 08-29-2007, 02:19 PM
 
Join Date: Jun 2003
Location: Philadelphia, PA, USA
Posts: 540
Re: Ground Loop?

They call it a "loop" because the connections will resemble a circle if you drew them out schematically like in a circuit diagram. If you "ground" (or "earth") items to other items you create a circular circuit. And electricity can flow around that circle.
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post #7 of 7 (permalink) Old 08-29-2007, 09:42 PM
eg
 
Join Date: May 2002
Posts: 259
Re: Ground Loop?

Thanks. Does powering up pedals using separate power adapters cause ground loops? I guess they should not because they are connected to the same ground on the power strip.
eg is offline  
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