The Dynaco Tube Audio Forum

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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


5 posters

    Dynaco st 70 series ll and pas 3 series ll

    Sergio
    Sergio
    Sergio


    Posts : 1
    Join date : 2017-12-24
    • Post n°1

    Dynaco st 70 series ll and pas 3 series ll Empty Dynaco st 70 series ll and pas 3 series ll

    Post by Sergio Tue Dec 26, 2017 7:29 am

    Dear friends,

    I have the opportunity to buy a Dynaco st 70 series ll and pas 3 series ll
    The price would be 800 dollars.
    Could you recommend me if it's worth your purchase.
    I do not see references of the quality of these devices.
    I thank you very much for your help
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    peterh
    peterh
    peterh


    Posts : 1832
    Join date : 2012-12-25
    Location : gothenburg, sweden
    • Post n°2

    Dynaco st 70 series ll and pas 3 series ll Empty Re: Dynaco st 70 series ll and pas 3 series ll

    Post by peterh Tue Dec 26, 2017 9:27 am

    Sergio wrote:Dear friends,

    I have the opportunity to buy a Dynaco st 70 series ll and pas 3 series ll
    The price would be 800 dollars.
    Could you recommend me if it's worth your purchase.
    I do not see references of the quality of these devices.
    I thank you very much for your help

    Y E S ! !
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    Bob Latino
    Bob Latino
    Bob Latino
    Admin


    Posts : 3262
    Join date : 2008-11-26
    Location : Massachusetts
    • Post n°3

    Dynaco st 70 series ll and pas 3 series ll Empty Re: Dynaco st 70 series ll and pas 3 series ll

    Post by Bob Latino Tue Dec 26, 2017 11:36 am

    The only problem I see with the purchase of either or both units is that AFAIK there are no boards available for either unit should you need to replace a board ? There is no aftermarket support for either the PAS-3 or ST-70 Series II. The PAS-3 series II was a transitional model from the early '90's put out by Panor. Later in the 1990's, Panor came out with the PAS-4 which is a very well made unit and better sounding than any PAS-3. A few years ago I had the opportunity to work on a PAS-4 for a local customer. Well made and a good sounding preamp for its day. The PAS-3 Series II had six 12AX7 tubes rather than four 12AX7 tubes like the original PAS-2/3. PAS-3 Series II schematic below ..

    Bob

    Dynaco st 70 series ll and pas 3 series ll Dynaco_PAS3_Series_II_schematic
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    j beede
    j beede
    j beede


    Posts : 473
    Join date : 2011-02-07
    Location : California
    • Post n°4

    Dynaco st 70 series ll and pas 3 series ll Empty Re: Dynaco st 70 series ll and pas 3 series ll

    Post by j beede Tue Dec 26, 2017 1:30 pm

    The circuitry can be repaired/updated. There is not too much that can be done about the cosmetics. If they are original, complete, stock, and look very good I would probably be a buyer.
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    DynakitParts
    DynakitParts
    DynakitParts


    Posts : 215
    Join date : 2008-11-30
    • Post n°5

    Dynaco st 70 series ll and pas 3 series ll Empty PAS 3 Series II

    Post by DynakitParts Tue Dec 26, 2017 7:22 pm

    Hi Guys,
    Merry Christmas....

    Finding a replacement circuit board mounted power transformer for this Series II preamp will be very difficult and this appears to be a common problem with this specific unit.

    Just my two cents on this....I agree with Bob that the PAS 4 is the more desirable unit.

    Regards,

    Kevin
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    • Post n°6

    Dynaco st 70 series ll and pas 3 series ll Empty Re: Dynaco st 70 series ll and pas 3 series ll

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