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Cleaning dirty pot?

Discussion in 'classic' started by bugbear, May 16, 2018.

  1. bugbear

    bugbear pfm Member

  2. Beobloke

    Beobloke pfm Member

    Servisol Super 10 switch contact cleaner. Spray into both sections of the pot, waggle back and forward over its full travel half a dozen or so times and leave for ten minutes to dry off.

    If that doesnt fix it, then I'm afraid you need a new pot.
     
  3. bugbear

    bugbear pfm Member

    Thanks for the tips. A new pot is unlikely to happen. Where (the heck) would I find a "non twinned" dual pot?

    BugBear
     
  4. Arkless Electronics

    Arkless Electronics Trade: Arkless

    They are also 1W and 2W power rating and possibly "semi precision" so no there is virtually zero chance of replacing them.
     
  5. MJS

    MJS Trade: Witch Hat Audio

    OK, here's a thought - how about making something out of a stepped attenuator. How much precision would you need between steps to get the bridge to function adequately?

    Failing that a visit to the next nearest Ham radio rally would probably yield another one waiting to be refurbished or scavenged.
     
  6. Arkless Electronics

    Arkless Electronics Trade: Arkless

    If they are part of the bridge balancing (likely) they need to be infinitely variable as we are looking for a sharp null.
     
  7. MJS

    MJS Trade: Witch Hat Audio

    I thought that might be the case, I've never used one though. Was just thinking out loud as to whether it would gain any useful functionality instead of an infinitely variable but noisy pot.
     
  8. bugbear

    bugbear pfm Member

    Good news - after some contact cleaner, it seems to be working.

    BugBear
     
    TheDecameron likes this.
  9. Robert

    Robert Tapehead

    Yep, that's good stuff.
    For the icing on the cake, once the Super 10 has evaporated, follow through with a quick burst of Caig Faderlube.
     
  10. Juancho

    Juancho Member

    I don't know what Caig Superlube is but a good plastic lubricant, as used in CD mechanisms etc, normally gives 100% cure. i think the one I use is caled 'SPL' or Special Plastic Lubricant
     
  11. rich46

    rich46 quad rules

    I find several small applications over 3 days/and operation and finally a touch of gold dioxit never fails
     
  12. Tony L

    Tony L Administrator

    It is expensive, but Deoxit Faderlube really is The Stuff and really can save vintage amps, guitars etc without having to replace the original pots. The can will last most people for a good decade or more so well worth having one knocking about as it cleans pots and they stay clean too as it lubricates them with the de-oxidising stuff. The non-lube switch cleaner D7 is very useful too. I have the full set here with the Gold F5 too, but that is being quite obsessive and to be honest it is the least useful of the three as gold contacts stay clean anyway!
     

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