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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 3 capacitor functions on the line stage board 5

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    smype


    Posts : 1
    Join date : 2020-12-02

    PAS 3 capacitor functions on the line stage board 5 Empty PAS 3 capacitor functions on the line stage board 5

    Post by smype Sat Aug 07, 2021 1:53 pm

    I have been rebuilding a PAS 3 and was wondering if these caps change the frequency balance of the output.  If they do, how do they change it?
    * The 1 uf caps that comes from the right and left bass tone pots (connecting to line board inputs 5 and 12)?
    * The .0075 uf caps in the line board circuit?

    If they don't change the frequency balance, was is their function?
    Thanks.
    peterh
    peterh


    Posts : 1599
    Join date : 2012-12-25
    Location : gothenburg, sweden

    PAS 3 capacitor functions on the line stage board 5 Empty Re: PAS 3 capacitor functions on the line stage board 5

    Post by peterh Sat Aug 07, 2021 8:18 pm

    smype wrote:I have been rebuilding a PAS 3 and was wondering if these caps change the frequency balance of the output.  If they do, how do they change it?
    * The 1 uf caps that comes from the right and left bass tone pots (connecting to line board inputs 5 and 12)?
    * The .0075 uf caps in the line board circuit?

    If they don't change the frequency balance, was is their function?
    Thanks.

    Their function is to isolate DC and keeping the AC to pass. As both are large enough
    they won't change frequency in the audio range.

      Current date/time is Mon Dec 06, 2021 4:48 pm