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    Dynaco Mark III Factory-Built Versus Kit

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    stewdan

    Posts: 122
    Join date: 2010-03-07
    Age: 76
    Location: Houston Texas

    Dynaco Mark III Factory-Built Versus Kit

    Post by stewdan on Sun May 22, 2011 3:07 pm

    Hi --

    Factory-built versus kit versions of the Mark III: I know about the Chassis Label, the use of rivets instead of nuts and bolts and the 1000 ohm resistors between pins 5 & 6 of the 6550 sockets on the Factory Built version.

    But are there any significant wiring differences between two versions of the amplifier??

    The Dynaco assembly manual (which I assume is for the kit version) shows one of the choke leads going to the SQUARE Tab of the quad cap and the other choke lead going to Pin #8 of the GZ34 socket. Then a wire runs from Pin #8 of the GZ34 socket back to the HALF-CIRCLE or HALF_MOON Tab of the quad cap.

    The few factory-built Mark III's that I have seen all had the stock 30-20-20-20 quad cap and had the choke leads going to the SQUARE Tab and the HALF-CIRCLE or HALF_MOON Tabs. Then a wire ran from the HALF-CIRCLE or HALF_MOON Tab of the quad cap back to Pin #8 of the GZ34 socket.

    Is this correct or are there some other wiring differences that I am missing??

    Would there be any appreciable voltage differences for readings taken on the Dynaco PCB or at the quad cap tabs based upon how the wires run?

    Please let me know,
    Stew bounce





    DynakitParts
    Admin

    Posts: 145
    Join date: 2008-11-30

    Re: Dynaco Mark III Factory-Built Versus Kit

    Post by DynakitParts on Wed May 25, 2011 10:07 pm


    Stew,
    Just a different method of wiring the choke...Either way is correct.

    With the jumper lead from the quad cap section (1) to pin # 8 of the rectifier's
    tube socket...you can connect the choke lead to either end of this jumper lead.

    Why would the factory tech wire it this way which conflicts with the manual...
    Who knows?

    Kevin @ dynakit


    Kevin @ Dynakit



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