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    'Special' input on Dyna Pas3 preamp

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    hrudu90

    Posts : 26
    Join date : 2011-01-02

    'Special' input on Dyna Pas3 preamp

    Post by hrudu90 on Tue May 19, 2015 12:08 pm

    I am wondering what is the 'special' input on the Dyna Pas3 is for?
    Can I use it as an "AUX' input?
    Thanks



    ~~~

    GP49

    Posts : 718
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: 'Special' input on Dyna Pas3 preamp

    Post by GP49 on Tue May 19, 2015 12:25 pm

    "SPECIAL" is a flat, unequalized input to the PHONO stage, intended for moving-coil microphones.  You could use it as a line input with proper padding-down of the signal to about 10% of its original level, otherwise the stage will overload.  However this will result in higher noise than into a proper line input, due to the gain of the phono stage even without equalization.  So that is not a good idea.

    "SPARE" is the extra line-level input.

    hrudu90

    Posts : 26
    Join date : 2011-01-02

    Re: 'Special' input on Dyna Pas3 preamp

    Post by hrudu90 on Sat May 30, 2015 1:18 pm

    Would it work if I use a phono preamp hooked up the that 'special' input for a 2nd turntable?

    BTW thank you GM49

    GP49

    Posts : 718
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: 'Special' input on Dyna Pas3 preamp

    Post by GP49 on Sat May 30, 2015 5:41 pm

    hrudu90 wrote:Would it work if I use a phono preamp hooked up the that 'special' input for a 2nd turntable?

    BTW thank you GP49

    You don't have to, if you have the original Dynaco selector switch. There are instructions in the Dynaco PAS manual on how to do just that, feeding either phono source to the PAS phono stage. For that matter the PAS phono board can be reconfigured to put all the RIAA equalization parts on the board, and the selector switch rewired to provide THREE phono inputs (the original Phono, Tape Head and Special selections).

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