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Audio transformer repair/rewinding?

Discussion in 'Tube Audio' started by SaturationPt, Oct 12, 2018.

  1. SaturationPt

    SaturationPt AK Subscriber Subscriber

    Messages:
    1,292
    Location:
    N.E. Indiana
    Who is recommended for repairing or rebuilding audio transformers (Hafler design in particular)?
     

     

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  2. crispycircuit

    crispycircuit AK Subscriber Subscriber

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    1,417
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    near Buffalo NY
    What is the exact transformer? To help better answer the question.....
     
  3. SaturationPt

    SaturationPt AK Subscriber Subscriber

    Messages:
    1,292
    Location:
    N.E. Indiana
    It is the LF transformer in an Acoustat MK-121-C Hafler Red Medallion. Interleaved windings, nomex, not sure if it can be repaired or needs rewinding.
     
  4. primosounds

    primosounds SE KT120 w/ 6J5G drivers. Subscriber

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    Heyboer does some of that. For a complete job of removing the old wire and rewiring its about twice the cost of just buyiing a new one.
     
    KentTeffeteller likes this.
  5. SaturationPt

    SaturationPt AK Subscriber Subscriber

    Messages:
    1,292
    Location:
    N.E. Indiana
    There are no new ones AFAIK, unless David Hafler has one in his basement.
     
    Retrovert likes this.
  6. cademan

    cademan Addicted Member

    Messages:
    8,992
    You can still buy new output transformers, just not specific to that amp unless Hafler does have one in his basement. :D

    Hammond and Edcore are a couple places to get transformers but these are basically general replacements and kit & hobbyists transformers.
     

     

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  7. Pio1980

    Pio1980 AK Member Subscriber

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    This looks like a very specific item for a specific application, not a catalog listing.
     
    Retrovert likes this.
  8. SaturationPt

    SaturationPt AK Subscriber Subscriber

    Messages:
    1,292
    Location:
    N.E. Indiana
    It is designed and manufactured for this application, and just the -C Red Medallion version, not an off-the-shelf. This is why I'm looking just for a re-wind specialist.

    Unless someone can get in touch with David for me, ... I'm looking for an audio transformer specialist please.
     
  9. Brice

    Brice AK Subscriber Subscriber

    Messages:
    1,481
    Location:
    Hoboken NJ
    I am using TRS and Heyboer. Both are top notch rewinding company.
    Gary at TRS just rewinds transformer, Heyboer does that and makes new one also.
    I've been always satisfied by both.
     
  10. KentTeffeteller

    KentTeffeteller Gimpus Stereophilus!

    Messages:
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    Location:
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    Heyboer is a reliable shop to get a rewind done. And he works on difficult audio transformers, and the rare and beloved.
     
  11. primosounds

    primosounds SE KT120 w/ 6J5G drivers. Subscriber

    Messages:
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    Location:
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    I meant a new off the shelf similar type of output transformer from them.
     

     

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  12. triode17

    triode17 Super Member

    Messages:
    1,250
    Hey fellas', David Hafler passed away a few years ago. Try Heyboer.
     

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