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Thread: Voice Coil Repair: A Lost Skill?

  1. #1
    Join Date: Feb 2017

    Location: London

    Posts: 9
    I'm Patrick.

    Default Voice Coil Repair: A Lost Skill?

    Hello all,
    Hoping that everyone's enjoying the sunshine.

    I'm a sucker for a tricky project and picking up speakers that have been given up on, but tweeter voice coils are way to fiddly for me. The idea of trying to wind that teeny tiny gauge wire on to the bobbin by hand confounds me, but does no-one offer this service in the UK anymore?

    I've spoken to a few companies and they all turned the work down (inc Wembley and DC Boultons). They say that it is too fiddly and not worth their while, but how can this be so? With second examples of classics like the Celestion HF1300 and Coles 4001 fetching from 50 - 100 +, and given that they already have the machine, surely there is a market for this?

    Is there anyone on here who has the ability to re-wind HF voice coils? It surely isn't beyond the wit of man to carry out this repair, after all they were originally manufactured by one!

    Maybe I just need to concede to the disposable age.

    P

  2. #2
    Join Date: May 2008

    Location: Surrey

    Posts: 5,758
    I'm Rob.

    Default

    Buy Bose...And get your parking validated!.

  3. #3
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 678
    I'm Andrew.

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    Quote Originally Posted by sholto76 View Post
    I've spoken to a few companies and they all turned the work down (inc Wembley and DC Boultons). They say that it is too fiddly and not worth their while, but how can this be so?
    They probably know their own market and their own business better than anyone else.

  4. #4
    Join Date: Feb 2017

    Location: London

    Posts: 9
    I'm Patrick.

    Default

    Fancy having a go? I certainly wouldn't be able make a 20mm tweeter coil. I wouldn't know how to start.
    P

  5. #5
    Join Date: Feb 2017

    Location: London

    Posts: 9
    I'm Patrick.

    Default

    Hmmmm...kind of. He actually said that it was just a bit of a pain because it was fiddly and that sometimes the wire snaps. I understand that, but this repair used to be possible and it appears now that people just don't fancy doing the work.

    I blame the government

  6. #6
    Join Date: Feb 2008

    Location: Middlesex, UK

    Posts: 2,931
    I'm Alex.


  7. #7
    Join Date: Feb 2008

    Location: Middlesex, UK

    Posts: 2,931
    I'm Alex.

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    Believe it or not, the tweeters (Audax) in these work pretty well to replace the Coles. http://www.ebay.co.uk/itm/JPW-Mini-M...-/352091557360

    The ones in the JPW Gold Monitor also work quite well. These are Peerless (India)

    The original DM2's used a Peerless DT10 HFC in place of the Coles. The DT10HFC is not too dissimilar to the tweeter in the Gold Monitor.
    Last edited by spendorman; 20-06-2017 at 17:01.
    Spendorman

  8. #8
    Join Date: Feb 2008

    Location: Middlesex, UK

    Posts: 2,931
    I'm Alex.

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    Might be worth asking this guy if he can supply for the Coles and HF1300, as to whether they will perform to spec. afterwards, that is another question.
    Spendorman

  9. #9
    Join Date: Oct 2012

    Location: NE England

    Posts: 4,617
    I'm Jez.

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    It's likely they have found people unwilling to pay a commercially viable rate to have the work carried out...
    Arkless Electronics-Engineered to be better. Tel. 01670 530674 (after 1pm)

    Modded Thorens TD150, Audio Technica AT-1005 MkII, Technics EPC-300MC, Arkless Hybrid MC phono stage, Arkless passive pre, Arkless 50WPC Class A SS power amp, (or) Arkless modded Leak Stereo 20, Modded Kef Reference 105/3's
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  10. #10
    Join Date: Jul 2009

    Location: Hampshire, UK

    Posts: 1,925
    I'm Buriedunderaloadofturntables.

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    We often used to wind our own voice coils by hand at Goodmans when making prototypes and it was indeed a fiddly, time-consuming process but hugely rewarding. The problem is that you really need the correct materials for formers, plus the correct mandrels to locate them on. Our coil wire came pre-varnished and you doused it with IPA as you wound, then put the whole thing on its mandrel into an oven to bake the varnish hard. The smell was epic when you forgot about it and left it in there too long!

    I still wonder what happened to the coil-winding setup when Goodmans closed, as I don't remember seeing it at the stock clearout auction.
    Last edited by Beobloke; 23-06-2017 at 11:51.
    Adam.

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