The Dynaco Tube Audio Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.
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


3 posters

    Pas 3 caps

    avatar
    JNTIT


    Posts : 4
    Join date : 2010-04-11

    Pas 3 caps Empty Pas 3 caps

    Post by JNTIT Sun Apr 18, 2010 11:48 am

    I've got a pas 3, that I want to re cap. Can anyone recommend a place to get some caps? This is my first foray into this so I'm a little hesitant about it, but I've got some mono blocks on the way, so I need to get going. Also thanks again to Bob for the bass pot info. Thanks John
    Bob Latino
    Bob Latino
    Admin


    Posts : 3114
    Join date : 2008-11-26
    Location : Massachusetts

    Pas 3 caps Empty Re: Pas 3 caps

    Post by Bob Latino Sun Apr 18, 2010 5:48 pm

    JNTIT wrote:I've got a pas 3, that I want to re cap. Can anyone recommend a place to get some caps? This is my first foray into this so I'm a little hesitant about it, but I've got some mono blocks on the way, so I need to get going. Also thanks again to Bob for the bass pot info. Thanks John

    Hi John,

    Antique Electronic Supply sells the SBE 716P "orange drop" capacitors. I have used over 1000 of these in the past 5 - 6 years. They are always very close to spec. 400 volt rated caps will be fine. To get the exact values just read the values off the cap in there now or check out the board layouts at one of our sticky posts at the link below.

    PAS-3 board layouts

    Bob
    avatar
    JNTIT


    Posts : 4
    Join date : 2010-04-11

    Pas 3 caps Empty Re: Pas 3 caps

    Post by JNTIT Sun Apr 18, 2010 7:02 pm

    Thanks, once again you come through!
    avatar
    quadaptor


    Posts : 59
    Join date : 2009-05-04

    Pas 3 caps Empty Alternative Caps?

    Post by quadaptor Mon Apr 19, 2010 2:47 pm

    Are there any other caps that provide better performance, or is this largely a moot point? Thanks
    Bob Latino
    Bob Latino
    Admin


    Posts : 3114
    Join date : 2008-11-26
    Location : Massachusetts

    Pas 3 caps Empty Re: Pas 3 caps

    Post by Bob Latino Mon Apr 19, 2010 3:46 pm

    quadaptor wrote:Are there any other caps that provide better performance, or is this largely a moot point? Thanks

    The problem with Dynaco preamps is that they were, from a sound quality point of view, somewhat behind the Dynaco amps. The PAS-2 or PAS-3 preamps have to be heavily modified in order to keep up with the amps. Usually this is done by swapping out the boards for boards with a better designed circuit. Probably the best boards around are the tubes4hifi PAS-3 board set which are very reasonably priced compared to other PAS-2,3 board upgrade sets. The three boards replace the power supply, line stage and phono stage board of a PAS2,3 with a circuit virtually identical to the tubes4hifi SP-8 preamp.

    IMHO replacing the caps on a PAS-2,3 with expensive caps is not really cost effective. You are probably better off to just replace them with decent caps that will increase the reliability of the preamp.

    If you do want a significant upgrade in sound quality then consider replacing the two boards and the power supply.

    Tubes4hifi PAS-2, 3 upgrade board set

    Bob

    Sponsored content


    Pas 3 caps Empty Re: Pas 3 caps

    Post by Sponsored content


      Current date/time is Thu Jan 20, 2022 9:49 am