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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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    Very early prototype ST70 utilizing toroidal output xfmrs.

    bozzjax
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    bozzjax


    Posts : 1
    Join date : 2012-06-14
    • Post n°1

    Very early prototype ST70 utilizing toroidal output xfmrs. Empty Very early prototype ST70 utilizing toroidal output xfmrs.

    Post by bozzjax Thu Jun 14, 2012 4:13 pm

    I own a very early ST70 prototype amplifier. It uses AVEL TOROID output xfmrs. It's basically an ST70 utilizing potted toroidal xfmrs driven by EL34 tubes. It is a handsome unit. Apparently a feasibility study that never made it into the marketplace. Probably not cost effective considering the new solid-state entries that were entering the market. An enquiry to AVEL in England elicited no help in the history of this unique unit. Are any of this forum members familiar with this one-of-a-kind DYNACO ?
    Bozz


    Last edited by bozzjax on Thu Jun 14, 2012 4:15 pm; edited 1 time in total (Reason for editing : inadvertently dropped one word)
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    Bob Latino
    Bob Latino
    Bob Latino
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    Posts : 3277
    Join date : 2008-11-26
    Location : Massachusetts
    • Post n°2

    Very early prototype ST70 utilizing toroidal output xfmrs. Empty Re: Very early prototype ST70 utilizing toroidal output xfmrs.

    Post by Bob Latino Thu Jun 14, 2012 4:28 pm

    Hi,

    Can you post a photo of this amp on the forum here? Someone might be familiar with the amp if they see it.

    Check the sticky's above on how to post a photo ..

    Bob
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    DynakitParts
    DynakitParts
    DynakitParts


    Posts : 215
    Join date : 2008-11-30
    • Post n°3

    Very early prototype ST70 utilizing toroidal output xfmrs. Empty Dynaco ST-70 Prototype

    Post by DynakitParts Fri Jun 15, 2012 9:54 pm


    Hi Bozzjax,
    I doubt this was a Dynaco produced product or early prototype.
    Avel Transformers LTD was Incorporated in 1983 whereas Dynaco ceased operation in
    Blackwood, NJ in 1980. This most likely is a owner modified unit...Avel transformers
    are made in China as are most products we buy today. Sad to say.

    Kevin @ Dynakit

    PS: Still would like to see a photo of this amplifier.
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    • Post n°4

    Very early prototype ST70 utilizing toroidal output xfmrs. Empty Re: Very early prototype ST70 utilizing toroidal output xfmrs.

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