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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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    VTA70 Upgrade a Success!

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    McGar


    Posts : 9
    Join date : 2015-05-29

    VTA70 Upgrade a Success! Empty VTA70 Upgrade a Success!

    Post by McGar Thu Jun 18, 2015 10:54 pm

    Wow! Thanks Bob and thanks Roy. The VTA70 upgrade in my old ST70 is just fantastic. As much as I loved the old ST70, this upgrade seems to give me more definition and less of the muddiness of the old sound. Next project is to install the pentode/triode switches.


    thanks for a great upgrade, guys!
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    j4570


    Posts : 150
    Join date : 2010-08-30

    VTA70 Upgrade a Success! Empty Re: VTA70 Upgrade a Success!

    Post by j4570 Fri Jun 19, 2015 9:30 am

    Good to hear. I love my VTA70 (the only original parts on mine are the output tranformers and the chassis/cage, everything else came from Bob.) I did all the upgrades at once. I put the switches in for pentode/triode, but I just prefer to leave mine in pentode mode.

    Did you upgrade the big can capacitor and replace the selenium rectifier?? If not, I'd go ahead and do that as well.

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    McGar


    Posts : 9
    Join date : 2015-05-29

    VTA70 Upgrade a Success! Empty Re: VTA70 Upgrade a Success!

    Post by McGar Wed Jul 08, 2015 4:34 pm

    thanks J4

    I had done the the selenium rectifier some years ago, but I was pleased to see the new vta board does seems to incorporate that fix as well.  As to the quad can, I had recently put a new one in, but my next upgrade will be to go to the larger capacity can.

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    VTA70 Upgrade a Success! Empty Re: VTA70 Upgrade a Success!

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