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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


4 posters

    ST-35 Output Transformer Ohms

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    jwb474


    Posts : 89
    Join date : 2014-07-13
    Age : 71
    Location : Wolfforth, Tx

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    Post by jwb474 Wed Jun 19, 2024 7:40 pm

    A quick question: Does the ST-35 Output transformer have the original 8 and 16 Ohms output or is it re-designed for 4 and 8 Ohms?
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    stewdan


    Posts : 234
    Join date : 2010-03-07
    Age : 86
    Location : Houston Texas

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    Post by stewdan Thu Jun 20, 2024 1:30 pm

    Hi --- in answer to your Transformer Output question, the link below is to Dynaco's Original Transformer Catalog.

    http://knob.planet.ee/kirjandus/books/Dynaco_Transformers.pdf

    The A-410 Transformer supports EL84/6AQ5.   Take a look at the input/output wiring diagram that follows the Transformer Chart.

    Stew
    Dave_in_Va
    Dave_in_Va


    Posts : 446
    Join date : 2013-04-02
    Location : Mid. VA

    ST-35 Output Transformer Ohms Empty Re: ST-35 Output Transformer Ohms

    Post by Dave_in_Va Thu Jun 20, 2024 1:46 pm

    I'm guessing the original poster is referring to the VTA ST 35. (The original Dynaco ST 35 had 8 and 16 ohm outputs.)
    Roy or Dan should be able to answer this.
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    jwb474


    Posts : 89
    Join date : 2014-07-13
    Age : 71
    Location : Wolfforth, Tx

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    Post by jwb474 Fri Jun 21, 2024 3:04 am

    Dave_in_Va wrote:I'm guessing the original poster is referring to the VTA ST 35. (The original Dynaco ST 35 had 8 and 16 ohm outputs.)
    Roy or Dan should be able to answer this.

    Yes, I am referring to the VTA offering. I have a SCA project underway and am looking at replacing the Transformers. In the past I have bought from Dynakitparts.com and their offering (Which has been out of stock for over a year) is re-designed to 4 and 8 ohms.
    Dan W
    Dan W
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    Posts : 23
    Join date : 2021-12-18
    Location : Owner - Tubes4Hifi

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    Post by Dan W Mon Jul 01, 2024 3:52 pm

    Our current production ST-35 (Z-565) Output transformers have 4 & 8 ohm taps and are in stock.

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