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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


    Pentode instead of UL in ST-70

    SuperB
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    SuperB


    Posts : 15
    Join date : 2012-01-01
    • Post n°1

    Pentode instead of UL in ST-70 Empty Pentode instead of UL in ST-70

    Post by SuperB Tue Jan 31, 2012 9:41 am

    Hi!
    Can I run the output stage (tubes) in pentode fixed screen mode with regulated voltage to the screen grids in the VTA ST-70?

    Also, it has 40mf as the first cap and 30mf for the driver section in the power supply, anyone tried those positions with PIO cap?

    Thanks!

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