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    Dynaco ST70 Find

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    UH1DG337

    Posts : 1
    Join date : 2013-08-11

    Dynaco ST70 Find

    Post by UH1DG337 on Sun Aug 11, 2013 10:28 am







    I am looking to buy this amplifier. As you can see, it has been modified. This would be my first tube amplifier. The seller says that it works. Can anybody give me any idea as to what some of these mods likely are, what they probably would have cost, whether or not this would be a good start, and what might be a fair price?

    Thanks in advance.

    DynakitParts
    Admin

    Posts : 181
    Join date : 2008-11-30

    ST-70 Find

    Post by DynakitParts on Sun Aug 11, 2013 11:04 am

    Hi,
       The seller should provide you with the details of these upgrades...assuming he knows. Appears
    someone replaced the original can capacitor with an array of individual capacitors. The (2) large blue caps look to be dangerously close to the under side of the cover. The Gizmo on the back side I assume is a volume control. Above this are (4) wires laced through the cover holes..I have no idea what these are but it is something I would not recommend doing.  PC board looks to be stock with a few modern components. The real value of this unit should be based on the transformers, chassis & cover assuming the transformers are good. As it is now with these modifications the value of this amplifier is greatly diminished. If it were me..I would not pay more than $200 to $250 for this unit.
     
    Kevin @ Dynakit

    peterh

    Posts : 641
    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: Dynaco ST70 Find

    Post by peterh on Sun Aug 11, 2013 12:03 pm

    UH1DG337 wrote:





    I am looking to buy this amplifier. As you can see, it has been modified. This would be my first tube amplifier. The seller says that it works. Can anybody give me any idea as to what some of these mods likely are, what they probably would have cost, whether or not this would be a good start, and what might be a fair price?

    Thanks in advance.
    This is only good as a base for total rebuild ( unless seller has an excellent documentation of the mods done)

    bid 150 dollar , don't more then 200 ( you can buy a brand new kit for 600 )

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