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


2 posters

    Driver Board Capacitor Values

    polarflux
    polarflux
    polarflux


    Posts : 49
    Join date : 2010-02-12
    Location : Alaska
    • Post n°1

    Driver Board Capacitor Values Empty Driver Board Capacitor Values

    Post by polarflux Thu Apr 10, 2014 12:45 pm

    I have been thinking about playing with some fancy caps in the driver board of my ST-70 and am wondering if anyone has a list of the values. I've misplaced by build documentation and feel like taking my amp apart to look. Also, I am welcome to cap recommendations. I've heard the Mundorf Gold or silvers are nice.

    -Polarflux
    • Back to top
    Bob Latino
    Bob Latino
    Bob Latino
    Admin


    Posts : 3262
    Join date : 2008-11-26
    Location : Massachusetts
    • Post n°2

    Driver Board Capacitor Values Empty Re: Driver Board Capacitor Values

    Post by Bob Latino Thu Apr 10, 2014 2:29 pm

    As for the four main coupling caps ... You can use really anything between .10 uF and .33 uF caps as long as they are 400 volt rated or higher ..

    Bob
    • Back to top
    polarflux
    polarflux
    polarflux


    Posts : 49
    Join date : 2010-02-12
    Location : Alaska
    • Post n°3

    Driver Board Capacitor Values Empty Re: Driver Board Capacitor Values

    Post by polarflux Thu Apr 10, 2014 3:36 pm

    Thanks Bob. Is it correct that the value of the other caps is 0.1uf? Also, are those call the interstage caps?
    • Back to top
    Bob Latino
    Bob Latino
    Bob Latino
    Admin


    Posts : 3262
    Join date : 2008-11-26
    Location : Massachusetts
    • Post n°4

    Driver Board Capacitor Values Empty Re: Driver Board Capacitor Values

    Post by Bob Latino Thu Apr 10, 2014 4:52 pm

    Yes .. The interstage caps on the VTA CCS driver board (C1 and C2) are .10 uF @ 400 volts. They are called "interstage" caps because they carry the audio signal from the voltage amplifier part of the board to the phase splitter/inverter part of the board.

    Bob
    • Back to top
    Sponsored content

    Sponsored content


    • Post n°5

    Driver Board Capacitor Values Empty Re: Driver Board Capacitor Values

    Post by Sponsored content

    • Back to top
      Current date/time is Fri Apr 26, 2024 4:43 pm