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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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    ST70 VTA board question

    mikaud
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    mikaud


    Posts : 3
    Join date : 2019-10-31
    • Post n°1

    ST70 VTA board question Empty ST70 VTA board question

    Post by mikaud Wed Dec 18, 2019 4:22 pm

    The NFB connection from the transformers (yellow wires from VTAst70 transformers) are connected to C11 and C12 correct?

    They are butted against each other on the board but I cant tell if the traces connect.
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    solderblob
    solderblob
    solderblob


    Posts : 105
    Join date : 2018-05-20
    Age : 78
    Location : Placerville, California
    • Post n°2

    ST70 VTA board question Empty Re: ST70 VTA board question

    Post by solderblob Wed Dec 18, 2019 4:44 pm

    mikaud wrote:The NFB connection from the transformers (yellow wires from VTAst70 transformers) are connected to C11 and C12 correct?

    They are butted against each other on the board but I cant tell if the traces connect.

    Yes.  Also connects to R7 and R8.  Roy has pics of the board on his site:

    http://www.tubes4hifi.com/VTA70v12-020.jpg

    http://www.tubes4hifi.com/VTA70v12-018.jpg

    Dave
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    mikaud
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    mikaud


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    Join date : 2019-10-31
    • Post n°3

    ST70 VTA board question Empty Re: ST70 VTA board question

    Post by mikaud Wed Dec 18, 2019 4:57 pm

    thank you for confirming, i was worried I had a short.
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