The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Dynaco VTA tube amp kits, all Tubes4hifi.com products and all Dynakitparts.com products


    Confusion with the Dynaco MKIV boards from VTA

    Share

    Guest
    Guest

    Confusion with the Dynaco MKIV boards from VTA

    Post by Guest on Fri Oct 22, 2010 11:38 pm

    I am in the process of rebuilding a pair of Dynaco MKIV's, and will be using the 12AT7 configuration from VTA. The parts list, and the VTA website, which shows the, Auricap upgrade, show the caps being used as .33uf. The schematic, and the actual board layout show a .22uf cap. Also there is a difference with the R15 resistor. Two show a 7.5K, and two show a 6.8K resistor. I realize these are not huge differences, but what should I believe. Thanks!

    JunkyJan

    Posts : 100
    Join date : 2008-12-09
    Location : BC, Canada

    Re: Confusion with the Dynaco MKIV boards from VTA

    Post by JunkyJan on Wed Nov 03, 2010 3:30 pm

    Hi Michael

    I have built the VTA boards for the Mark III (which is pretty similar IIRC) about 6 weeks or so ago. Think of the .33 caps as a "better" .22 cap - it makes absolutely no difference.

    The different resistor values are probably a hi-gain version of the board.

    -- JunkyJan

      Current date/time is Tue Sep 27, 2016 2:57 pm