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


    Newbie here

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    grizzinca

    Posts : 40
    Join date : 2012-01-01

    Newbie here

    Post by grizzinca on Thu Jan 26, 2012 1:44 am

    Am I posting in the correct forum? I have an st 70 and alot of questions

    jhoak

    Posts : 46
    Join date : 2009-10-16
    Age : 59
    Location : Central Florida

    Re: Newbie here

    Post by jhoak on Thu Jan 26, 2012 9:13 am

    Welcome!!

    Yep. You're in the right place. Ask away.
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    Bob Latino
    Admin

    Posts : 2580
    Join date : 2008-11-26
    Location : Massachusetts

    Re: Newbie here

    Post by Bob Latino on Thu Jan 26, 2012 9:30 am

    Hi,

    Yes ... This is the correct area to post any Dynaco tube related questions ... Just hit "Post Reply" (to ask a question in this thread) and ask away ..

    Bob

    grizzinca

    Posts : 40
    Join date : 2012-01-01

    Thanks for the welcome.

    Post by grizzinca on Fri Jan 27, 2012 1:10 am

    My first question concerns the rectifier tube. My st 70 has in its place a cardboard tube about 2 inches tall and an inch or so in diameter. I suspect that some one has made some changes prior to me buying it. Do I leave well enough alone or should I replace this with a tube and socket? Amp sounds fine, holds bias and doesn't have any obvious (to me) problems. Thanks for your time. Look forward to learning all I can.
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    Bob Latino
    Admin

    Posts : 2580
    Join date : 2008-11-26
    Location : Massachusetts

    Re: Newbie here

    Post by Bob Latino on Fri Jan 27, 2012 9:28 am

    Hi,

    If your amp has a "cardboard tube" in place of the rectifier tube socket then a previous owner has probably removed the rectifier tube socket and has added capacitance in place of the rectifier tube. This probably means that he is using diodes somewhere inside the amp to do rectification. If the amp is running fine, then I would just leave it as it is.

    If you want us to check it out, see if you can send us a photo of the inside wiring and we can tell you more. Check out the sticky post above to see how to post a photo on the Dynaco Tube Audio Forum.

    Bob

    grizzinca

    Posts : 40
    Join date : 2012-01-01

    Thanks Bob.

    Post by grizzinca on Sun Jan 29, 2012 12:16 am

    My first attempt at photo hosting. Hope this works and you're able to see what you need to see.

    grizzinca

    Posts : 40
    Join date : 2012-01-01

    Re: Newbie here

    Post by grizzinca on Sun Jan 29, 2012 12:17 am

    Already noticed didn't send the pic. I'll get educated and try again later.

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