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    Tube noob questions about ST70.

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    tygr1

    Posts : 35
    Join date : 2014-12-08

    Tube noob questions about ST70.

    Post by tygr1 on Mon Dec 08, 2014 12:56 pm

    How much effect on the sound in general do the driver board tubes have? Is it worth tube rolling here? It has the VTA 12AU7 board.

    dougmon

    Posts : 65
    Join date : 2013-11-04
    Age : 60

    Re: Tube noob questions about ST70.

    Post by dougmon on Mon Dec 08, 2014 1:25 pm

    My experience is that it does have an effect on sound, though maybe not as much as tube rolling in the preamp. Try substituting something like a CV4003 just in the middle position -- that's what I did, and there was some difference. Also the Siemens E82CC tubes are nice.

    The general wisdom says that replacing the middle tube on the driver board will make the most difference.

    tygr1

    Posts : 35
    Join date : 2014-12-08

    Re: Tube noob questions about ST70.

    Post by tygr1 on Mon Dec 08, 2014 1:29 pm

    Thanks dougmon, that is most appreciated.

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