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


    ST-120 Power Tube Pairs

    Share

    davidness

    Posts : 39
    Join date : 2010-09-15

    ST-120 Power Tube Pairs

    Post by davidness on Thu Sep 16, 2010 2:59 pm

    I originally had a Quad of Valve Art KT-88's, and then I bought a matched Quad of Gold Lion KT-88's (reissues).

    I believe I might have damaged 1 or 2 from each set, so I've ordered a 'matched' pair of each as replacements, but these new replacements may not match exactly the previous tubes other than in brand.

    So...

    Which tube positions, if any, benefit from being a matched pair?

    To take this a step further, and not that I plan to, but can I mix brands, using 2 Gold Lions and 2 Valve Arts? Thoughts?


    Bob Latino
    Admin

    Posts : 2413
    Join date : 2008-11-26
    Location : Massachusetts

    Re: ST-120 Power Tube Pairs

    Post by Bob Latino on Thu Sep 16, 2010 3:49 pm

    Hi David,

    It is always better to use a matched quad (4 tubes) of the same type of tube in the ST-120. That said, the next best thing would be to use matched pairs on each channel even though the two channels would be using different pairs of tubes. The third choice (and not the best one) would be to use an unmatched pair on one or both channels.

    Bob

      Current date/time is Thu Dec 08, 2016 9:49 pm