2 decimators and STILL feedbacking! Whats going on?!?

Discussion in 'Beginners/FAQ' started by Gmork, Apr 26, 2018.

  1. Gmork

    Gmork SS.org Regular

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    Sorry for the length but i just want to get all the details in.

    Need HELP!
    Im getting almost constant feedback when i play at my jam spot. Im forced to push my noise gates to pretty extreme measures to tame it and i STILL get a "tail" of feedback directly after a note/chord (but not WHILE im playing)

    Ive got a decimator Gstring AND a decimator1 on my board. This SHOULD NOT be happening. My signal goes...

    Guitar (ibanez ironlabel 8 string withEMG 808 PUs--line6 g30 wireless--
    tc polytuner noir-- deci Gstring gtr in--
    deci Gstring gtr out to amptweaker tightmetal pro-- decimator1--
    quilter toneblock201 amp--
    Fxloop send to deci Gstring dec input-- deci Gstring dec output to tc T2 reverb-- Tc mini ditty looper-- back into quilter fx loop return-- amp speaker outputs to an 800w 2x12 and 400w 2x12.
    ALL evidence monorail cables.

    I dont remember this happening at my jam spot over the last couple years. This is new. And at home at low volume its perfectly fine.

    Btw i use to ONLY own just the single original decimator and tried it after the tightmetal as well as in the the amp fx loop with no improvement.
     
  2. goobaba

    goobaba SS.org Regular

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    Something similarly was happening to me recently and I just slightly adjusted my cables on pedals by moving them and adjusting them and then everything got quiet. Give that a try if you haven't.
     
  3. Rev2010

    Rev2010 Contributor

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    Just to be a stickler, noise gates aren't really "feedback" eliminators, they stifle noise when you stop playing. There are several feedback eliminators on the market, such as the very effective Behringer Feedback Destroyer (though it's 1U rack mount). But, that might alter your sound in a way you can notice and not like.

    Have you tried other guitars? It could be, though the chance is small, that you have a microphonic pickup.


    Rev.
     
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  4. KnightBrolaire

    KnightBrolaire self-appointed sso pickup tester

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    common problems ime:
    too much gain or volume
    poorly potted pickups
    gate settings are too low
    electronics/pickups are not properly shielded
     
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  5. bostjan

    bostjan MicroMetal Contributor

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    Change the battery in the guitar, if you haven't yet.
     
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  6. lurè

    lurè Thy Art Is Mambo

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    EMG are epoxy incapsulated so chances of becoming microphonic are pretty low.
    Try to change the battery and check for any ground/soldering issues.
    Does the feedback disappear with all the pedals turned off?
     
  7. TheWarAgainstTime

    TheWarAgainstTime "TWAT" for short

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    Are you damping the strings to prevent ringing behind the nut at all? I've also seen people, myself included, get sympathetic ringing from strings ringing out inside the body. Both of these problems can be solved with some electrical tape, but I prefer foam or rubber grommets for behind the nut

    EDIT: here's what I mean about the grommets

    [​IMG]
     
    Last edited: Apr 26, 2018
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  8. NateFalcon

    NateFalcon Party’s over

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    Does anybody use power conditioners anymore??...There could be all sorts of problems with your electrical in your house...I’d never send “dirty power” (which is ANY power not run through an APC or power conditioner) to my expensive gear...you should be protecting your gear from power surges anyway, regardless of hum or polarity. A buddy recently had this problem...he called me because I’m a residential/commercial electrician. I show up, he’s got about 4 circuits feeding ALL the power from a highly undersized and overloaded electrical panel, and his entire house had NO GROUNDS on any outlets!!, AND he had computer equipment plugged in to the same circuit (with NO APC!) he was trying to power his whole rig on. He had “power strips” all over his house and didn’t understand why he had out of control hum, (frequency bleed-over) and feedback.

    PS...check your cables and pickup batteries as mentioned also
     
    Last edited: Apr 26, 2018
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  9. Gmork

    Gmork SS.org Regular

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    Foam muting strings behindvmy nut. Brand new evidence monorail cables .cioks dc10 power supply .tripp lite av2fp high powered surge protector .

    I take my rig pretty seriously .Not running through a bunch of crappy power strips or anything .
    Would be pretty funny if it turns out to simply be the battery in my guitar lol .

    Check out my rig . (this is my amp and everything on my board btw) rsz_fotor_152468449791924.jpg rsz_fotor_15246848156093.jpg
     
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  10. NateFalcon

    NateFalcon Party’s over

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    The Tripp lite wasn’t mentioned before, your rig looks pretty tight btw...it’s probably something simple, start checking everything...see if you can isolate the feedback to a particular unit...?
     
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  11. Jacksonluvr636

    Jacksonluvr636 SS.org Regular

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    Try this with the G string and eliminate the other Decimator:

    guitar > drive pedals > guitar in dec > guitar out dec > amp input

    Keep everything about the FX loop the same.

    I know this is not what the instructions say but just try it. I had the same exact issue and this is what fixed it.
     
  12. Gmork

    Gmork SS.org Regular

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    Anything is worth trying at this point
     
  13. 7 Dying Trees

    7 Dying Trees Forum MVP

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    I had high pitched feedback when I was using a radial tone bone to switch heads. I think it was due to ground loops.

    Now, I would basically start from scratch. Slowly add pedal by pedal to the rig, leave FX loop till last.

    Next add in any pedals that go via the FX loop etc.

    Once you get the problem:
    If there's any ground lift switches, flip them, see if they help.
    If adapters etc grounded via different plug to amp, then maybe remove the ground, as they're only pedals. Or plug into same plug socket as amp.
    Swap extension plugs, and anything else wall warts etc are plugged into

    it'll be something very very very simple and stupid.
     
  14. 7 Dying Trees

    7 Dying Trees Forum MVP

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    forgot to add, once i stopped using the tonebone, both amps went back to normal. Although by this point I'd assumed the preamp tubes were microphonic and had replaced them in both amps :/
     
  15. bostjan

    bostjan MicroMetal Contributor

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    Did you try the battery yet?
     
  16. Gmork

    Gmork SS.org Regular

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    using brand new evidence monorail cables .
    all pedals powered by cioks dc10 power supply. That AND amp go into tripplite avf2 high powered surge protector .then single power cord to wall outlet .

    not yet but will throw a new battery in this wednesday for band practice .weird thing is when im at home at low volume everything is perfectly fine.
     
  17. NateFalcon

    NateFalcon Party’s over

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    Dying pickup batteries usually don’t cause feedback...they make you sound like the bass player from Korn...
     
  18. 7 Dying Trees

    7 Dying Trees Forum MVP

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    Have you tried the setup at home at rehearsal volume
     
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  19. bostjan

    bostjan MicroMetal Contributor

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    Not true. EMG pickups often make a squealing noise that sounds a lot like feedback when the battery is drained. I've had EMGs in 6 guitars before (well, one is a bass), and at least half of them have done this at one point or another. It's shockingly annoying, and it's a large part of why I don't use EMGs anymore. I don't mind having to replace a battery, but having some horrible screeching noise coming from your guitar because you forgot to run out and grab a fresh 9V at a show, in front of a bunch of people including other musicians, is just an experience I don't ever want to have to relive.

    At any rate, it's not that I'm saying that it is the battery, but I am saying that it'd be the first or second thing to try in any sort of troubleshooting procedure.
     
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  20. btbg

    btbg SS.org Regular

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    What a permanent and useful solution.
     

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