Power transformer wire color code for Drake T4145?

Discussion in 'Let's Talk Vintage' started by Matthews Guitars, Jun 6, 2020.

  1. Matthews Guitars

    Matthews Guitars Well-Known Member

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    I've got a good condition T4145 that I intend to run in this 1970 Super Lead I'm restoring.

    I have not yet found the color code chart for it.

    Can anyone provide that, please?

    What I'm listing is what I THINK is right but I request confirmation.

    I have not found any document that completely matches this transformer's wiring code.



    Its wiring as it comes out of each grommet:

    Blue and orange (orange common, blue 220V)

    Red and purple (red 120v, blue 240v)

    Blue, grey, and yellow (Yellow center tap, blue and grey HV pair)

    And the black, black, green, white bundle. (white 96v bias, two blacks filament 6.3vac, green center tap)

    I might have this right. I want to know before I assume so without documentation or experienced advice.
     
    Last edited: Jun 6, 2020
  2. Gutch220

    Gutch220 Well-Known Member

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  3. neikeel

    neikeel Well-Known Member

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    Primaries
    Purple 240v
    Blue 220v
    Red 120v
    Orange common

    Secondaries
    Blue and Grey = HT
    Yellow CT
     
    Last edited: Jun 7, 2020
    pleximaster likes this.
  4. Matthews Guitars

    Matthews Guitars Well-Known Member

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    Yeah, I think I got it right now. Thanks for the confirmation.

    I'll verify it by tickling the primary winding with a variac at low voltage and reading the outputs, before I wire it in.
     
  5. william vogel

    william vogel Member

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    Dagnall T4145 I think C’s Drake?
     
  6. Matthews Guitars

    Matthews Guitars Well-Known Member

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    It's a Drake. It's actually rubber stamped DET 4145H
     
  7. Marshallhead

    Marshallhead Well-Known Member

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    It’s a Dagnall.
     
  8. Matthews Guitars

    Matthews Guitars Well-Known Member

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    Then whomever had it before me and stuck a hand-written sticker on it got it wrong. I was working on the assumption that that person would be correct about that.

    Thanks for the update.
     
  9. neikeel

    neikeel Well-Known Member

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    The Drake equivalent is a 1209-3 (the OT would be a 1202-99).
    DET is a Dagnall (or some suppliers used the DET stamp as well) as Marshallhead pointed out, I thought it common knowledge that DET was Dagnall Electronics Transformers.
    The variac approach is always a good one on unknown transformers. I do a similar check for all transformers (including OTs) to check the ratios before bolting in place. I use an old PT with a 100vac winding which makes the maths easier!
     
    CoyotesGator likes this.

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