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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


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stewdan
Soundbrigade
thinker1920
turbodan
tubes4hifi
Bob Latino
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    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

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    oldsmobuick

    Posts : 12
    Join date : 2015-03-19

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by oldsmobuick Thu Mar 19, 2015 8:51 pm

    Question: my PC6 board from T4HF has the .047 caps as 0.10 caps (unless I am remembering wrong?). Is this by design? Thanks!
    tubes4hifi
    tubes4hifi
    Admin

    Posts : 1709
    Join date : 2008-11-30

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by tubes4hifi Thu Mar 19, 2015 9:39 pm

    yes, the board works the same with the larger capacitor value
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    oldsmobuick

    Posts : 12
    Join date : 2015-03-19

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by oldsmobuick Thu Mar 19, 2015 9:41 pm

    Thanks Roy! Really enjoying the boards!

    -Nick
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    oldsmobuick

    Posts : 12
    Join date : 2015-03-19

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by oldsmobuick Wed Mar 25, 2015 3:59 pm

    One more question, on the layout above there is a 4M7 resistor on PC6. Does that come as a 2M resistor these days? Or maybe I didn't swap the 4M7 back in after I tried the Curcio RIAA mod. I have a 2M there but wanted to go back to a stock PC6 board circuit.
    tubes4hifi
    tubes4hifi
    Admin

    Posts : 1709
    Join date : 2008-11-30

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by tubes4hifi Fri Apr 03, 2015 10:57 pm

    it's hard to find a 4.7M resistor these days, and the 2.2M actually gives a slightly better RIAA EQ for the phono section.
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    breading

    Posts : 39
    Join date : 2010-01-08

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by breading Fri Oct 08, 2021 6:21 pm

    roy,
    In your post from 2015 regarding the layout for the PAS3 PC-6 board you state that 2 100K resistors should be changed to 95.3K. There are actually 4 100K resistors on the board. Which are to be changed?
    Thanks,
    Bruce
    tubes4hifi
    tubes4hifi
    Admin

    Posts : 1709
    Join date : 2008-11-30

    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

    Post by tubes4hifi Fri Oct 08, 2021 8:50 pm

    Bruce,
    if you look at post 2 in this thread the parts list shows which one should be 95.3K for better phono EQ


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    Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ... - Page 2 Empty Re: Board layouts for the PC-5 line stage and PC-6 phono board on the PAS preamps - photos ...

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