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    VTA board purchased

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    NuttyLemur

    Posts : 18
    Join date : 2013-06-29

    VTA board purchased

    Post by NuttyLemur on Wed Aug 28, 2013 1:36 am

    Just sprang for the VTA board, finally. Super stoked to get it. What kind of time frame before it arrives!

    Think I will get the new transformer next.

    Probably need to do something about that quad cap before it poo's the bed. Anyone use the multiple cap boards, or just use a replacement quad?


    stewdan

    Posts : 161
    Join date : 2010-03-07
    Age : 78
    Location : Houston Texas

    Re: VTA board purchased

    Post by stewdan on Wed Aug 28, 2013 9:06 am

    Hi -- I have used replacement Quad Caps or Multi-cap Boards on both the ST70 and the Mark III amps.  There has been much discussion on the Forum about the merits of both and the writer's viewpoints are usually a function of their personal taste.

    Some of the discussion is based on keeping the "Stock Dynaco Look" and if so, use the Quad Cap.    Others prefer the Multi-Cap Board approach, since modern ESR Electrolytic Caps are "small" and can fit underneath the chassis.

    I have a pair of Mark IIIs where each amp uses a perf board that holds 10 electrolytic caps (47MF@450v) and 10 resistors and fits underneath the chassis.  Modern caps are very quiet compared to the original quad cap. The amps use Roy's MK3-VTA boards and sound very good.  

    I also have a pair of Mark IIIs that use the 80-40-30-20 @550v/600v Quad Cap.  Each quad cap was $60 plus shipping.  

    My cost for building the 2 multi-cap boards was less than $50 and could also be used on a ST70 with a wiring change.

    Hope that answers your questions.

    Have fun.

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: VTA board purchased

    Post by sKiZo on Wed Aug 28, 2013 1:34 pm

    ... also worth mentioning, the stock quad caps were kinda wimpy, and the new replacements have been beefed up substantially ...

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: VTA board purchased

    Post by sKiZo on Wed Aug 28, 2013 1:37 pm

    stewdan wrote:Some of the discussion is based on keeping the "Stock Dynaco Look" and if so, use the Quad Cap.    Others prefer the Multi-Cap Board approach, since modern ESR Electrolytic Caps are "small" and can fit underneath the chassis.
    So, like ... I guess I went for the "Stock Dynaco Look" ... alien 


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