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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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    Newbie problems with a ST-70 rebuild VTA70 driver board / bias display: no sound

    Roy Mottram
    Roy Mottram
    Roy Mottram
    Admin


    Posts : 1839
    Join date : 2008-11-30
    • Post n°26

    Newbie problems with a ST-70 rebuild VTA70 driver board / bias display: no sound - Page 2 Empty Re: Newbie problems with a ST-70 rebuild VTA70 driver board / bias display: no sound

    Post by Roy Mottram Thu Nov 16, 2023 2:21 pm

    the LM334 that was in backwards needs to be replaced.
    Also the one cap in this photo needs to be relocated as shown

    Newbie problems with a ST-70 rebuild VTA70 driver board / bias display: no sound - Page 2 St70_c10
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