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Thread: Replacing a dustcap

  1. #1
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    Replacing a dustcap

    Hi,

    I've got a K-140 with a dented dust cap. How do I remove the cap without getting further damage to the woofer? Is dissolving the glue with MEK an option? New caps and glue are laying besides me yet...

    Best regards!

  2. #2
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    Here comes a write-up

    Quote Originally Posted by Kay Pirinha View Post
    Hi,

    I've got a K-140 with a dented dust cap. How do I remove the cap without getting further damage to the woofer? Is dissolving the glue with MEK an option? New caps and glue are laying besides me yet...

    Best regards!

    See this thread in this forum:

    http://www.audioheritage.org/vbullet...+advice+please

    Ruediger
    Last edited by Ruediger; 05-03-2019 at 06:26 AM. Reason: added link

  3. #3
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    Quote Originally Posted by Kay Pirinha View Post
    Hi,

    I've got a K-140 with a dented dust cap. How do I remove the cap without getting further damage to the woofer? Is dissolving the glue with MEK an option? New caps and glue are laying besides me yet...

    Best regards!
    Hi Kay - I've done it 3 or 4 times using an exacto knife (new). Steady hand, very touchy. You've got to get down as close to the voice coil as possible without causing damage. Stuff tends to fall down into the gap. Scary business. Also, in my experience, the old glue will not dissolve - once it sets, the chemistry is permanent. I was successful, but honestly, if you know an experienced pro, it may be worth a few euros - tricks of the trade, etc.

  4. #4
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    I've yet done this procedure at my own old K-140 some decades ago, after I had accidentally dented it's cap. Anyway, I have to confess that I don't remember the details any more . As my lousy memory tells me, my work was very similar to Rüdiger's, without the use of acetone, though.

    I hope acetone or MEK won't affect the cone paper or the VC glue?

    Best regards!

  5. #5
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    Quote Originally Posted by Kay Pirinha View Post
    I've yet done this procedure at my own old K-140 some decades ago, after I had accidentally dented it's cap. Anyway, I have to confess that I don't remember the details any more . As my lousy memory tells me, my work was very similar to Rüdiger's, without the use of acetone, though.

    I hope acetone or MEK won't affect the cone paper or the VC glue?

    Best regards!
    MEK can carry the glue into the cone, darkening it in the surrounding area.

  6. #6
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    Yes, just in the sense of a chromatography . It might harden the cone in that area, just like some coating. Is this more than a cosmetic issue?

    Best regards!

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