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Loud POP when engaging a pedal.

Discussion in 'Effects [BG]' started by aguacateojos, Dec 6, 2013.

  1. I've done a bit of reading on this subject but haven't found much in the way of answers so I come to you, Talkbass:

    I purchased an Iron Ether Xerograph Deluxe from the classifieds a few months ago. A switch broke in transit so I sent it to Taylor at IE and it was fixed. I didn't really test it out until this week because all of my gigs have been on upright but there is now a very loud POP when hitting the foot switch.

    I've found conflicting accounts of causes and solutions for this problem on Google and TB. Taylor said it was best to replace the entire switch but I don't have experience with that type of work and it looks like IE isn't taking on new projects now.

    So, anyone ever find themselves in this situation? Suggestions, other than muting my amp each time I use the switch?
  2. synaesthesia


    Apr 13, 2004
    If it is a true bypass switch tie a 2M to 10M resistor between the hot and ground at the input. Try a 5M first ...
  3. Marial

    Marial weapons-grade plum

    Apr 8, 2011
    This happens with my IE Nimbus, but only the first time I engage it. After that it's fine.
  4. noahw1


    Jul 22, 2005
    Los Angeles, CA
    I had the same issue with my Joyo Ultimate Drive last night. I've had it about three weeks and this was the first time it did it. Any help along these lines would be great.
  5. synaesthesia


    Apr 13, 2004
    See post #2
  6. DagoMaino


    Feb 1, 2013

  7. mmbongo

    mmbongo Chicken Pot Pie. My three favorite things!! Supporting Member

    Why wouldn't they do something this simple at the factory?
  8. deathsdj


    Sep 18, 2010
    Wichita, KS
    I have had that happen on occasion, came to find out it was static electricity.
  9. Stumbo

    Stumbo Wherever you go, there you are.

    I suggest you shoot a PM to JohnK_10.
  10. synaesthesia


    Apr 13, 2004
    Some manufacturers do, and it depends on what you have in your chain. It is caused by the DC offset. My 2 effect looper on my pedal board worked fine until I reconfigured my chain to work with rack's my send and return. So I modified it. My Turbo tuner was doing the same.

    I apologise if you are insulted or any of your favourite manufacturers have been slighted by this modification. Why I bother to post here anymore Richard Dawkins only knows.

    Read this and get on the evolutionary chain.

  11. bongomania

    bongomania Gold Supporting Member Commercial User

    Oct 17, 2005
    PDX, OR
    owner, OVNIFX and OVNILabs
    Settle down now, it was a fair question if read at face value. The answer is "it costs a wee bit more in labor, and can easily be skipped over, since all customers demand is true bypass".
  12. synaesthesia


    Apr 13, 2004
    Actually it is the nature of the beast for this sort of switching circuitry. You can also discharge DC build up by muting the audio in the system, and engaging/disengaging the switch a few times, I.e. Stomping on/off and it will clear. If you power off and on again, e.g. Between sets - you'd have to repeat the process.
  13. Turning it on / off multiple times does nothing to stop the noise.

    Last night I had my first electric rehearsal in a month. While using electrical contact cleaner on a fuzzy pot in my amp I wondered... what if. Tried it on the pedal and the POP is now a small click. Much less harsh on the ears.

    New problem? Now that I'm able to turn it on and off I've realized that there there is a second-long pause when turning it off before sound returns.
  14. synaesthesia


    Apr 13, 2004
    According to the manufacturer Iron Ether's website your effect uses a relay instead of a more common 3PDT switch; this is technically superior and does not have the inherent dc offset issue which is part and parcel of the 3PDT types -viz. nature of the beast- your relay is probably defective if it is making a pop, as it is not supposed to.
  15. Marial

    Marial weapons-grade plum

    Apr 8, 2011
    Yeah, my Nimbus appears to have failed now. I'm now getting distant static when it's engaged (bypass works fine and sounds completely normal) that comes in and out. Big bummer as my Polytope just arrived today and I was really looking forward to using them in conjunction.
  16. Vlad5

    Vlad5 Chronic Knob Twiddling Tone Chaser

    Feb 17, 2011
    New England
    Sounds like something wonky with the switch...
  17. Taylor Livingston

    Taylor Livingston Supporting Member Commercial User

    Dec 25, 2002
    Louisiana, US
    Owner, Iron Ether Electronics
    Hi folks, my name is Jet, I work with Taylor and am logging in with his account while he's on medical leave.

    While it's true that we are not taking new orders right now, we will always take care of repair issues as long as we're around, so please contact us at info@ironether.com and we will sort you out.

    I do know that the pedal in question in the first post is the very first custom Xerograph from years ago, before the move to relay switching. IE has always used pulldown resistors on bypass switches, so that is not the problem - those 3PDT switches just aren't very good for the purpose which is why Taylor switched to relay switching even though it's more expensive.
  18. MCS4

    MCS4 Supporting Member

    Sep 26, 2012
    Fort Lauderdale, FL
    My IE Polytope usually gives a very loud pop when first engaged, even after a trip back to IE for repairs. Same with one of my other true bypass pedals. It seems like sometimes this is not a fixable issue or may have more to do with other aspects of the signal chain.

    Generally I try to remember to kick all of my true bypass pedals on and off a couple of times before a gig or practice, to reduce the possibility of the pop happening mid-song.
  19. negativefx

    negativefx complete hack

    Feb 18, 2013
    Fort Collins
    My super duper 2in1 was doing this. I replaced the 3pdt and all was well.
  20. rsmith601

    rsmith601 Gold Supporting Member

    Apr 14, 2009
    Boston, MA
    President, Source Audio
    Any pedal which is really truly "True Bypass" is going to pop at times. Putting a large resistor to ground means that a pedal can no longer be called "True Bypass". True means true, right? Also, if you have 20 pedals on your board and they all have the same modification (1 meg resistors to ground), then you might get real (or imagined) tone suck!

    Relay-based true bypass is likely going to do better than the big switches with pops, because all of the connections are much shorter.

    I can't see how us pedal guys can insert these resistors and call our pedals "true bypass".

    The best solution is what we copied from TC: selectable true or high quality buffered bypass. Buffered bypass is much less likely to pop.....and.....it is nice high impedance.