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

    bias implementation on M-125 monoblocks

    avatar
    buchela


    Posts : 79
    Join date : 2011-03-09

    bias implementation on M-125 monoblocks Empty bias implementation on M-125 monoblocks

    Post by buchela Wed Apr 06, 2011 2:36 pm

    what are the reasons for choosing one pot bias adjustment per two tubes, versus single tube bias adjustment.
    The simpler the better?
    Bob Latino
    Bob Latino
    Admin


    Posts : 3276
    Join date : 2008-11-26
    Location : Massachusetts

    bias implementation on M-125 monoblocks Empty Re: bias implementation on M-125 monoblocks

    Post by Bob Latino Wed Apr 06, 2011 3:38 pm

    Yes - Using one bias pot for the two left tubes and one bias pot for the two right tubes keeps the bias circuit simpler. Most people will be using a matched quad of output tubes anyhow, so a further refinement of the bias circuit is not really necessary.

    Bob
    avatar
    buchela


    Posts : 79
    Join date : 2011-03-09

    bias implementation on M-125 monoblocks Empty Re: bias implementation on M-125 monoblocks

    Post by buchela Wed Apr 06, 2011 5:16 pm

    BOB: The reason why I ask is: I ordered a quad set of EH kt88 and they came with stickers showing 39 and 40 written on them, I been told that is OK. that made my juices circulate fast, what about if I found myself with two different matched sets lets say 39 one pair and 41 the other one, would I be in trouble? will the M-125 take it without adversely affecting anything ?
    Bob Latino
    Bob Latino
    Admin


    Posts : 3276
    Join date : 2008-11-26
    Location : Massachusetts

    bias implementation on M-125 monoblocks Empty Re: bias implementation on M-125 monoblocks

    Post by Bob Latino Thu Apr 07, 2011 10:26 am

    Those tubes are so closely matched that they will work fine in there ..

    Bob

    Sponsored content


    bias implementation on M-125 monoblocks Empty Re: bias implementation on M-125 monoblocks

    Post by Sponsored content


      Current date/time is Fri Nov 22, 2024 5:37 pm