1970 Champ transformer with resin on outside?

Discussion in 'Amp Tech Center' started by Blueguitar007, Apr 18, 2019.

  1. Blueguitar007

    Blueguitar007 TDPRI Member

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    I bought a 1970 Camp that is a closet classic - no scratches on face-plate..everything immaculate.
    Everything looks great but the transformer has some sort of hard resin around the outside..the sides only, not the top.
    Inside the amp the transformer looks good. It works fine, just wondering if anyone has seen this before?
    It looks like someone painted this on at the factory. The owner did no work at all except one electrolytic cap was replaced - everything else, including cap can and speaker is original.
    I replaced a blown resistor and swapped out the electrolytic caps. Amp sounds great btw.
    I have yet to find a google image of this. It's hard resin type material that is about 1- 2mm thick and uniform all around, albeit not super neat looking. It seems to be on there for eternity; I don't think you could get it off if you wanted to. I don't mind it, but never have seen this in any of the Fenders I've had including a few of these SF Champs.
    Any info appreciated,
    Thanks
     

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  2. joeford

    joeford Friend of Leo's

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    definitely not a factory job that I've ever seen. i wonder if somebody gooped on some epoxy to try to seal the potting wax from leaking out of the transformer? no idea...

    then again, if it's not hurting anything and it sounds good... maybe it's some long lost tone secret...
     
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  3. galaxiex

    galaxiex Tele-Holic Silver Supporter

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    Sometimes transformers hum in use.

    Nothing wrong, they just do.

    Usually can be cured by tightening the screws.

    Maybe that one wouldn't stop humming so someone gooped it?
     
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  4. Dacious

    Dacious Poster Extraordinaire

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    If you can peel it off easily, maybe do so. It might take off some clear lacquer - might be an idea to hit it with some clear.

    But if it's working and sounds good I wouldn't worry. It isn't damaged most likely. People do odd things sometimes with good but misguided intentions.
     
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  5. schmee

    schmee Poster Extraordinaire

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    Not factory, hard to say what someone did, maybe they were just trying to cover some rust and made a bad choice of goop.
     
  6. peteb

    peteb Friend of Leo's

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    Epoxy is what came to my mind the instant I saw it. 2 part epoxy. Like JB weld. white + black = gray



    That's the only reason that makes sense to me.
     
  7. Blueguitar007

    Blueguitar007 TDPRI Member

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    Thanks for the insights. Just so weird that the rest of the amp is unmolested.
     
  8. Blueguitar007

    Blueguitar007 TDPRI Member

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    Amp is dead quiet..don't think it would have had hum issues. Champs are usually dead quiet.
     
  9. Blueguitar007

    Blueguitar007 TDPRI Member

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    A sculptor with a chisel might be able to but I'm not going to mess with it.
     
  10. Wally

    Wally Telefied Ad Free Member

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    I would suggest not messing with it. This is the same amp that has the brightness issue, correct? Too bright?
    Same advice as I; that thread.....take voltage measurements to beg8; the process of understanding what is going on with the amp. Do the math on the bias numbers. Figure out what you have.....or get a tech??
     
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