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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


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    PAS Circuit Question

    breading
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    breading


    Posts : 45
    Join date : 2010-01-08
    • Post n°1

    PAS Circuit Question Empty PAS Circuit Question

    Post by breading Sun Aug 14, 2022 3:27 pm

    I am attempting to trace an output problem with my PAS. I am unfamiliar with circuitry and want an answer to a very basic question.

    Does a line level input signal travel through the phono circuit board prior to going through the line level board? If not, the answer will help me eliminate that board as a source of my problem.
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    Onlinepeterh
    peterh
    peterh


    Posts : 1869
    Join date : 2012-12-25
    Location : gothenburg, sweden
    • Post n°2

    PAS Circuit Question Empty Re: PAS Circuit Question

    Post by peterh Sun Aug 14, 2022 3:59 pm

    breading wrote:I am attempting to trace an output problem with my PAS.  I am unfamiliar with circuitry and want an answer to a very basic question.

    Does a line level input signal travel through the phono circuit board prior to going through the line level board?  If not, the answer will help me eliminate that board as a source of my problem.
    No. The line level input goes to the selector switch and then the balance pot. From the viper of the
    balance it goes to the volume pot and finally to eyelet 2 & 9 on the line board.

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    daveshel
    daveshel
    daveshel


    Posts : 169
    Join date : 2011-11-06
    Location : Tucson AZ USA
    • Post n°3

    PAS Circuit Question Empty Re: PAS Circuit Question

    Post by daveshel Fri Sep 16, 2022 12:15 am

    No. Unlike an SCA-35 (which is sometimes described as a marriage of an ST-35 and a PAS), the PAS can operate high level sources without the phono board.
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    • Post n°4

    PAS Circuit Question Empty Re: PAS Circuit Question

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