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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


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    Verifying secondaries on Dynaco MKII OT

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    Chris Scott


    Posts : 27
    Join date : 2017-05-09

    Verifying secondaries on Dynaco MKII OT Empty Verifying secondaries on Dynaco MKII OT

    Post by Chris Scott Thu May 11, 2017 5:06 pm

    Hey everyone. Same unit(s) as I mentioned in my previous post...the secondary leads on one of the amps have enough discoloration on the insulation to make it impossible to verify what is what, and I was wondering how to test, and what values I should expect to see on them.

    I measured the static resistance (all secondaries disconnected, with all primaries wired up) from what I'm pretty certain to be the black lead to the other two, and got 0.4-5 and 0.5-6, which I'm guessing equates to 8 and 16 ohm respectively?

    Thanks!
    j beede
    j beede


    Posts : 473
    Join date : 2011-02-07
    Location : California

    Verifying secondaries on Dynaco MKII OT Empty Re: Verifying secondaries on Dynaco MKII OT

    Post by j beede Fri May 12, 2017 1:12 am

    Open the bell so you can see the original, unfaded colors of the wires.
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    Chris Scott


    Posts : 27
    Join date : 2017-05-09

    Verifying secondaries on Dynaco MKII OT Empty Re: Verifying secondaries on Dynaco MKII OT

    Post by Chris Scott Fri May 12, 2017 1:33 am

    j beede wrote:Open the bell so you can see the original, unfaded colors of the wires.

    Yup, I figured that one out already, just thought there might be a quicker way (not that it'll take any real time of course Very Happy )

    Thanks mate!

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    Verifying secondaries on Dynaco MKII OT Empty Re: Verifying secondaries on Dynaco MKII OT

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