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  1. #1
    Les Paul Forum Member
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    Mar 2019
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    21

    Very noisy LPC - Will shielding help?

    I recently noticed that my Les Paul Custom is very noisy compared to other instruments. I play with relatively high gain & itís disturbingly noisy when I use a cable. When I use wireless itís less noisy & when I lay my hand on the strings or bridge it becomes quiet. Is it properly grounded? Should I shield the cavities with copper?
    Itís so noisy that if I donít keep my hands on the strings when strumming while palm muting the low E I hear the noise between the notes.

    My LP traditional has new EMGís & itís dead quiet. The other LP standard with DiMarzios is also about as noisy as the custom & a Charvel with SD pickups is a bit less noisy than both. Maybe the many cables running from my PC may have something to do with it as I never noticed this with a MacBook.

    Iíd like to solve it without installing EMGís as I quite like the Gibson 498T - any tips?

  2. #2
    Les Paul Forum Member sonar's Avatar
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    Jan 2003
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    Re: Very noisy LPC - Will shielding help?

    Maybe. Maybe not.

    You've got a lot of variables going on with your setup.

    Strip it down to just the guitar and an amp set clean, then add preamp gain and/or a distortion pedal. You want to rule out grounding issues with the guitar and all your cables. Try plugging the amp and guitar (rotating cables) into different outlets around the house and see if there are differences in noise.

    As for the rest, good luck. The level of gain you play, into a computer setup we have no idea about, are variables that get complicated really quick. Post a detailed description of your setup and we can try to help.

    And you can always turn down the gain.

  3. #3
    Les Paul Forum Member Keefoman's Avatar
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    Re: Very noisy LPC - Will shielding help?

    Much gain will cause noise. Especially with traditional pickups and electronics. Are you EMGs active, by the way? That would explain why they are quieter.

    It could be a solder joint problem of course, but as you say, it's quiet when you touch the strings...

    Have you considered less gain? You'd be surprised how little gain many (even metal) guitarplayers actually use.
    Last edited by Keefoman; 09-22-19 at 12:39 PM. Reason: Typo

  4. #4
    Les Paul Forum Member
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    Mar 2019
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    21

    Re: Very noisy LPC - Will shielding help?

    The problem is there even on crunch levels of gain. I have tried using my portable Yamaha THR10X with only batteries & the problem persists. When I have a clean sound itís not a problem. I try to keep the gain as low as possible, ideally around Metallica Load / Garage-Inc levels. But death metal needs some high gain to sound good IMO.

    yes the EMGís are active, itís the 57/66 combo only wired to the volume controls & pickup switch.
    I think the PC set-up somehow interferes & that the cable acts as a Ďreceiverí, because wireless is much quieter. Looking st the control cavity the cables look very bare, but Iím not an expert.

  5. #5
    Les Paul Forum Member DRB9091's Avatar
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    Sep 2019
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    Holly Springs, NC
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    9

    Re: Very noisy LPC - Will shielding help?

    A few possible things, none involving "shielding the cavity". Put that out of your mind. It's a gimmick if you have proper solder joints, grounding, and conditioned juice.

    I'm sure you switched out leads to eliminate the cable, tried another guitar to eliminate the amp and line, so then it's down to reconditioning or replacing electronics.

    Unless you have SC, lol, then that's supposed to happen, right?

    I've always done my own electroics and on one Strat project I just couldn't get anything right to stop hum. I ended up buying the whole preassembled pot/switch to prove I messed up and sure enough, everything was silky smooth.
    Worth the money to humble myself a notch.

  6. #6
    Les Paul Forum Member
    Join Date
    Aug 2015
    Posts
    79

    Re: Very noisy LPC - Will shielding help?

    Quote Originally Posted by lns View Post
    I recently noticed that my Les Paul Custom is very noisy compared to other instruments. I play with relatively high gain & it’s disturbingly noisy when I use a cable. When I use wireless it’s less noisy & when I lay my hand on the strings or bridge it becomes quiet. Is it properly grounded? Should I shield the cavities with copper?
    It’s so noisy that if I don’t keep my hands on the strings when strumming while palm muting the low E I hear the noise between the notes.

    My LP traditional has new EMG’s & it’s dead quiet. The other LP standard with DiMarzios is also about as noisy as the custom & a Charvel with SD pickups is a bit less noisy than both. Maybe the many cables running from my PC may have something to do with it as I never noticed this with a MacBook.

    I’d like to solve it without installing EMG’s as I quite like the Gibson 498T - any tips?
    Mine aren`t noisy at all. Is yours a 60th anniversary?
    Last edited by BadCat; 09-22-19 at 12:57 PM.

  7. #7
    Les Paul Forum Member sonar's Avatar
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    Jan 2003
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    3,521

    Re: Very noisy LPC - Will shielding help?

    Quote Originally Posted by lns View Post
    The problem is there even on crunch levels of gain. I have tried using my portable Yamaha THR10X with only batteries & the problem persists. When I have a clean sound it’s not a problem. I try to keep the gain as low as possible, ideally around Metallica Load / Garage-Inc levels. But death metal needs some high gain to sound good IMO.

    yes the EMG’s are active, it’s the 57/66 combo only wired to the volume controls & pickup switch.
    I think the PC set-up somehow interferes & that the cable acts as a ‘receiver’, because wireless is much quieter. Looking st the control cavity the cables look very bare, but I’m not an expert.
    It reads like a grounding issue, maybe more.

    Check and if needed repair the ground scheme. It's not uncommon for the ground wire going from the back of the pots or ground plate (can't remember) to the tailpiece either separating or in a few cases (including my LP) never properly installed at the factory. I'd check that first.

    A pic of the cavity would really help the forum sort this out.

    I strongly recommend that every guitar player own a Digital Multi Meter. It's a key tool that at the least will help identify continuity. Even a cheap, $20 Chinese DMM is better than nothing.

    Concentrate on the guitar first, then tackle the PC setup.

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