The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Dynaco VTA tube amp kits, all Tubes4hifi.com products and all Dynakitparts.com products


    Dynaco SCA-35 help

    Share

    Babgrip

    Posts : 27
    Join date : 2013-01-30
    Age : 55
    Location : Jax FL

    Dynaco SCA-35 help

    Post by Babgrip on Tue Jan 14, 2014 11:14 am

    Just picked up sca35 all tubes power up except one 7199 . I have tried swapping positions ,same problem. Any ideas where to start tracing problem .
    Thank you

    peterh

    Posts : 679
    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: Dynaco SCA-35 help

    Post by peterh on Tue Jan 14, 2014 11:50 am

    What do you mean with "power up" ? Is the filament not glowing on one 7199 ?
    Is it located to the socket or does it follow the 7199 ?

    sailor

    Posts : 269
    Join date : 2011-04-04

    Re: Dynaco SCA-35 help

    Post by sailor on Tue Jan 14, 2014 12:27 pm

    If you mean one socket then leave the tube out and test to see if you have filament voltage. [Must test from the top to find out if it is rust inside] If you do not have voltage it must be the socket or a wire [solder joint] between the 2 boards.

    Babgrip

    Posts : 27
    Join date : 2013-01-30
    Age : 55
    Location : Jax FL

    Re: Dynaco SCA-35 help

    Post by Babgrip on Tue Jan 14, 2014 1:33 pm

    Checked voltages at both 7199 tube sockets both check out ok. Swapped out the 12ax7's with different set of tubes . Problem solved
    Thank you for help.

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: Dynaco SCA-35 help

    Post by sKiZo on Tue Jan 14, 2014 3:37 pm

    'Twere all life's problems be so easily solved ...


    Sponsored content

    Re: Dynaco SCA-35 help

    Post by Sponsored content Today at 4:35 pm


      Current date/time is Mon Dec 05, 2016 4:35 pm