Results 1 to 6 of 6

Thread: Ground loops in a guitar ?

  1. #1
    Woodgrinder/Pickupwinder copperheadroads's Avatar
    Join Date
    Jun 2009
    Location
    Iceburg Alley ,Newfoundland,CAN
    Posts
    2,058
    Thumbs Up/Down
    Received: 0/0
    Given: 4/0

    Ground loops in a guitar ?

    I know it exist in Amp building but in a guitar ? I'm not convinced & i keep hearing this from newbies .........or players with more basic understanding .
    go ahead let me know what you think ...................

    0 Not allowed! Not allowed!
    "UP here in the Canada we shoot things we don't understand"

  2. #2
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    29,901
    Thumbs Up/Down
    Received: 82/1
    Given: 0/0
    I would think only when people mis-use the term ground loop. Many people call anything making hum a "ground loop". To me, a ground loop occurs when two pieces of equipment have differing ground potentials are connected together by an additional ground path, like a cord between two amps. I am not sure how you could have multiple current paths in the ground inside my guitar.

    But I freely admit I am not a guitar guy, I am an amp guy.

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  3. #3
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    13,040
    Thumbs Up/Down
    Received: 43/0
    Given: 48/0
    +1
    The differential voltages and relatively short ground leads in a guitar (even relative to their low output and that they will be extremely amplified) seem too low to be problematic. I've never had a particular guitar that seemed to hum more than usual unless it was a gain issue more related to hot pickups. I do know I've read about it happening though. Since I don't have those suspect guitars on my bench I can't verify one way or the other. But I lean toward "Not a problem".

    0 Not allowed! Not allowed!
    "I'm just going to perform a bit more scientific investigation, turn it up to 11 and rip of the knob." überfuzz

    "...less ear-friendly but handy for jazz." Leo_Gnardo

    "A pedal, any kind, will not make a Guitar player more dangerous than he already is." J M Fahey

    "If you build it, it will hum..." Justin Thomas

  4. #4
    Old Timer
    Join Date
    Feb 2010
    Location
    Just south of Bawlmer, Merlin
    Posts
    2,329
    Thumbs Up/Down
    Received: 45/1
    Given: 33/0
    If you run the ground wires in a path that forms a closed loop, I suppose you technically have a loop antenna - which is not the same thing as a ground loop as Enzo elucidated. But I doubt it will make any difference.

    Just don't ground your guitar like this:


    0 Not allowed! Not allowed!
    Last edited by rjb; 07-05-2017 at 05:56 PM. Reason: Removed redundant "the same"

  5. #5
    Senior Member
    Join Date
    Mar 2008
    Posts
    436
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    The ground loops by itself is not a big deal (I saw a lot of working circuits with mistakes) the problem is difference of potential between path in a loop which determine a current to run modulating the signal. Good practice should avoid it.

    0 Not allowed! Not allowed!

  6. #6
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    3,253
    Thumbs Up/Down
    Received: 16/0
    Given: 2/0
    I work on guitar electronics pretty much every day, day-in, day-out. I've never seen a guitar that's had a 'ground loop' (in the conventional sense of the term). If this were possible, then guitars would need to be bus connected, or star-grounded. Sure, there are numerous ground issues that can occur, but the potentials, current flow and resistances involved make the scenario theoretical and based on micro-potentials which would make no audible difference.

    I say that fully with the knowledge that I have a customer who swears he can hear the difference between pickup selections on a Les Paul when the guitar is played acoustically and not plugged in. So, I guess 'hearing' ground loops for some is eminently possible, as are voices from the spirit world.

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Ground Loops in AB763 Deluxe
    By mikepukmel in forum Build Your Amp
    Replies: 4
    Last Post: 03-24-2017, 09:07 PM
  2. Pedalboard Ground Loops
    By mhuss in forum Guitar Effects
    Replies: 3
    Last Post: 06-22-2015, 04:10 PM
  3. Ground Loops In PC Board Interconnects
    By TomCarlos in forum Guitar Amps
    Replies: 3
    Last Post: 02-23-2014, 05:14 AM
  4. Hums, ground loops, and strange squeals.
    By theWicked in forum Maintenance, Troubleshooting & Repair
    Replies: 0
    Last Post: 11-04-2010, 01:59 AM
  5. Lifting Ground Loops in a 6G15 Stand Alone Reverb
    By tubeswell in forum Tweed Builders
    Replies: 14
    Last Post: 12-03-2008, 01:06 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •