Power Supply PCB for ES9023 / WM8804 S/PDIF DAC Group Buy

[presbel]

Hi Subbu,
I received yesterday the PCB that you sent me in my temporary address in Los Angeles, CA.
Thanks and regards,

Rey

[ByronInLawrence]

Originally Posted by korben69

Hi ryanj
Have a look there : ES9023 / WM8804 S/PDIF DAC Parts GB EU Only

Forgot to mention that you have to add C13 and Cled, not added in this original BOM.
Cled : 10uF/6.3v - 0805 - X7R - MLCC
C13 : 1uF/25v - 1210 - X7R - MLCC
"Moderator Emeritus" effect

Phil

oh . . . found it.

[diy_calderon]

in my thickest NY accent "Bawds received!"

[palmito]

Originally Posted by ByronInLawrence

C13 looks like it might be the same as C2, C4 and C5. Should I use C2, C4 and C5 for C13?

I didn't get C13 either, but got extra C2/C4/C5s like Byron. Can I use the 16v rated C2 instead of the BOM C13 (1uF/25v )? I think in the dac thread someone gave that as a "hint", but just want to be sure.

Thanks.

[Ryssen]

Power Supply PCB for ES9023 / WM8804 S/PDIF DAC Group Buy

[pchw]

16V rated is fine for the suggested 8 VAC transformer, and mine is 16V rated.
Even my main shoots up another 30%, it will still be fine, but I am likely to have other gears to blow first :-)

[syklab]

Originally Posted by palmito

I didn't get C13 either, but got extra C2/C4/C5s like Byron. Can I use the 16v rated C2 instead of the BOM C13 (1uF/25v )? I think in the dac thread someone gave that as a "hint", but just want to be sure.

Thanks.

You should be able to use the same 1uf MLCC 16V or 25V for C2/C4/C5 and C13.
I use flim cap for C2/C4/C5 and MLCC X7R for C13. With our transformer ouput only 8-10V, 16V rating should be good enough.

[jean-paul]

Hi I would use 25V versions for all caps before the LM723 like described in the BOM (why deviate from the BOM anyway ?). If the transformer gives around 10V then 15V DC is close to the max. rating of 16V. It will certainly come close to the max. when it is unloaded. Not exactly good design practice, in fact I would call it "potentially unreliable". I like reliable safe good sounding electronics that I can leave powered on if I like. There are too many devices breaking down already so we swim against the current. Good old fashioned fine sounding stuff that lasts......

Strange thing: some want an overdimensioned ttransformer that also gives a too high voltage and at the other hand caps are chosen too tight .

[palmito]

Originally Posted by jean-paul

Hi I would use 25V versions for all caps before the LM723 like described in the BOM (why deviate from the BOM anyway ?).

Sorry jean-paul, I was confused by the first page BOM (updated 11/30/2012) listing the 25v cap but the Mouser part number in the BOM, for both the standard and alternate caps, pointing to a 16v part. I wrongly assumed the 16v caps would do. I will get 25v parts for all.

Or am I using the wrong BOM?

Happy New Year to all and thanks.

[raymondo]

Subbu received my boards a couple of weeks ago (they arrived at work before xmas but i was off) many thanks - fine quality and working great . Another big thanks to Subbu jean Paul and Phil for the parts . Great work