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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


    ST35 capacitor ratings

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    • Post n°1

    ST35 capacitor ratings Empty ST35 capacitor ratings

    Post by Guest Sun Apr 17, 2011 10:12 pm

    Are there any benefits in increasing the DC voltage ratings of the positive feedback cap (C3) from 200 to 400V and the coupling caps from 400V to 600V, other than perhaps prolonging their life span? Are the original ratings more than adequate?

    Thanks
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    • Post n°2

    ST35 capacitor ratings Empty ST-35 Capacitor ratings

    Post by DynakitParts Sun Apr 17, 2011 11:24 pm


    Hi,
    The original MFD values are fine although I have had a few customers claim some
    improvement by increasing the coupling caps C4 & C5 to .2 MFD.

    There is not much room on the PC-13 to begin with and the original values sound just
    fine to me. Increasing the voltage rating on these caps is a good idea in my opinion.

    Kevin @ Dynakit
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