Anyone ever have this happen?

Discussion in 'Tele-Technical' started by dougstrum, Feb 6, 2019.

  1. dougstrum

    dougstrum Tele-Holic

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    Vol pot went bad on a thinline I'd built almost 30yrs ago.

    I replaced it with one out of my parts drawer, felt smooth and not a lot of solder on it only ground lug to the case.

    When I hooked it up the pot is off about half way through rotation and volume tapers from there to wide open. Rotating from half toward off volume increases to what might be about half volume.

    Obviously I need a brand new pot, but
    never seen anything like this before funkyo_O
     
  2. Wally

    Wally Telefied Ad Free Member

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    Yeah, That is why I throw pots away immediately when I take them out of a circuit.....or even if I find it used lying around. I hate to waste time soldering in a used part that was removed because it was no good.
     
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  3. CV Jee Beez

    CV Jee Beez Tele-Holic

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    Seems like the wiper has gone bad.
     
  4. schmee

    schmee Poster Extraordinaire

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    Bad wiper or an oddball pot. It seems I had a blend pot that did that that I confused with normal...
     
  5. jrblue

    jrblue Tele-Afflicted

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    Unless I've taken a pot I really like (usually, good taper) out of service for some positive reason, like reconfiguring a harness, I chuck my used pots. I find that pot value and taper and performance are pretty influential in shaping my guitar's sound, so I really can't deal with iffy used pots when I'm trying to dial something in. There are way too many variables anyway!
     
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  6. knockeduptele

    knockeduptele Tele-Meister

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    Too many pot surprises of late leading to too many wild goose chases trying to get tone circuits right, so I spent the weekend measuring a drawer full of mainly new pots and (sadly) cataloging the tapers - next week i might start to catalog the screws..........
     
  7. dougstrum

    dougstrum Tele-Holic

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    Hey Wally, I am getting better at tossing the junk...
     
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  8. Wally

    Wally Telefied Ad Free Member

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    It is difficult to turn some things loose, I know.
     
  9. hopdybob

    hopdybob Tele-Afflicted

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    i know, its an amp story but the problem the same.

    yamaha AR2500 amp with the gain/volume/masterpot were bad.
    1 off those was a reversed taper version to
    some guys at a dutch guitar forum opt: open them op and clean them with iso 90% alcohol and a soft brush.
    and i did, and everything is working fine now.
    take an old one, maybe the one you build in now, and give it a go on that one.
    took a little eg bowl put some alcohol in it after opening the pot.
    let it soak a while and than carefully brush the print.
    then took a grit 2000 water resistant sanding paper and let it go 2 times underneath the wiper.
    let it dry for a good while, put it back together and tested it with the multi-meter.
    maybe this helps
     
  10. Bob M

    Bob M Tele-Afflicted Ad Free Member

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    It seems like a lot of work for a part that is pretty cheap! Like a lot of you guys for years I saved every conceivable "extra" part, nut, bolt and screw. When I moved a few years ago I realized I was saving stuff I probably would never use. Now I tend to be the other way. I toss stuff quickly now. Every now and then I may regret it, but it sure has reduce the clutter around my workbench.
     
  11. hopdybob

    hopdybob Tele-Afflicted

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    bit is a lot of work, but you will have the correct values that were in the guitar ore amp.
    the new pots are mostly 20% around the value you buy.
    and in a guitar that can change the sound a lot if you have bad luck
     
  12. Wally

    Wally Telefied Ad Free Member

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    In a case where I cannot get the part for a modern amp...yes, that happens...I might take one apart and restore it. For a vintage instrument thatis worth something and in which I want to maintain originality, I would try to rebuild a vintage pot. A serious buyer would balk at the non-oriignal solder joints, but the date codes should allay such concerns.
    I had to tear apart a brand new 250k DPDT push/pull pot just to get the switching mechanism with which to rebuild a certain pot in a red Knob The Twin back in the late ‘90’s. I could not find that pot anywhere.
     
  13. dougstrum

    dougstrum Tele-Holic

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    Vintage correct vs gig ready are totally different parameters.

    For a 30yr old first build, replacement pot is the practical route to take.
     
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