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    Can anyone identify this Dynaco ST-70 PCB?

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    MikeTorello

    Posts : 2
    Join date : 2014-07-10

    Can anyone identify this Dynaco ST-70 PCB?

    Post by MikeTorello on Wed May 06, 2015 7:11 pm

    Hi all!

    Can anyone please help me and identify this Dynaco ST-70 pcb mod! I tried to find anything on this particular mod, but have not so far been able to.

    https://plus.google.com/photos/113334333955863905796/albums/6145896397579307857?authkey=CLrS3ubpg8iKGg

    Thank you all!

    Cheers!

    MT

    anbitet66

    Posts : 132
    Join date : 2009-12-23
    Location : Valley Stream, NY

    Re: Can anyone identify this Dynaco ST-70 PCB?

    Post by anbitet66 on Wed May 06, 2015 9:06 pm

    Mike,

    I think you are looking at the SDS EF86 board that was sold by Triode Electronics.  It resembles this scan of the board, though not precisely.  http://www.quadesl.com/pdf/st70board_ef86.pdf  I have the 6AU6 version.  It breaks the original pentode/triode assembly up from 2 tubes to 3 by using a 12AU7 in the middle as a triode phase splitter with the outside tubes the EF86's as the pentode amplifiers.  The sound from this board is similar to the original.

    Tony

    MikeTorello

    Posts : 2
    Join date : 2014-07-10

    Re: Can anyone identify this Dynaco ST-70 PCB?

    Post by MikeTorello on Thu May 07, 2015 6:02 pm

    Thank you, Tony!  Very Happy

    You are right this is very similar and I guess I was looking for a exact copy no wonder  Shocked  I had not been able to find it.

    Cheers,

    MT

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