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Quanghao Audio Design Quanghao Audio Design is a producer of DIY Audiophile Kits and PCB boards, selected from many listening tests!

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Old 8th February 2010, 09:42 AM   #591
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Quote:
Originally Posted by le“flu View Post
Hi Quang Hao,
did you find any mistakes in the Printing on the PCB?
Are there wrong values or can i just orientate at the
Parts printed on?

Greetings Ulf
no! it is not wrong! if you se it, you can show me please!
thank
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update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
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Old 8th February 2010, 11:31 AM   #592
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Quote:
Originally Posted by adamus View Post
I'm using the jj, only £10.

I'll be using obbligatos in the critical film positions. I may also look at tube rectification, a bit of air wiring will be needed. I'll try the solid state at first of course.
Adam,
Please give me your opinion regarding all these polyester caps in parallel with Oscon and near the AD1865 and CS8141. I would prefer MKP instead MKS. I've got some axial polystyrene 33nF to mount vertically. I bought some Vishay BC MKS but I don't feel confident to solder them. I excluded any Wima.
Also those cheap ceramic capacitor seam to work very well in some positions.

What do you recommend?

Last edited by apelizzo; 8th February 2010 at 11:43 AM.
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Old 8th February 2010, 11:48 AM   #593
adamus is offline adamus  United Kingdom
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mkp woul be good, but i would be suprised if you hear the difference. I used mks and would again.
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Old 8th February 2010, 12:15 PM   #594
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Quote:
Originally Posted by quanghao View Post
hi Patrick! I alway say that: about 3-4 weeds you will get it! some PCb arrive early!
It is that you! see in the image. Im sorry I post here!
Quanghao... Can you show mine? I'm afraid i give you wrong address
Can you scan it like Patrick for me?
Im in Indonesia....
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Old 8th February 2010, 02:10 PM   #595
tassosk is offline tassosk  Greece
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My boards arrived today. Good work,
Thanks for your effort.
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Old 9th February 2010, 02:39 AM   #596
MarkLai is offline MarkLai  Hong Kong
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Quanghao,
Both pcbs of EUVL and mind are received.
Thanks a lot for organise the GB.
Mark
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Old 9th February 2010, 05:09 AM   #597
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Originally Posted by MarkLai View Post
Quanghao,
Both pcbs of EUVL and mind are received.
Thanks a lot for organise the GB.
Mark
Thank you!
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Old 9th February 2010, 09:33 AM   #598
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quanghao, my boards arrived today in good condition. They look great. Many thanks again for arranging to have them made & sending to group buy participants.

Re power transformers, in a previous post andrea suggested the following: LS70-1 (2x15V, 1x12V) & R80-55 (1x250V, 2x9V).

apelizzo, does the Murata DA101C replace, or is it an alternative for the Newava S22083?
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Old 9th February 2010, 09:53 AM   #599
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Any digital input transformer could be used in this project so also the Murata DA101C and Newava S22083 probably are good.
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Old 9th February 2010, 10:25 AM   #600
adamus is offline adamus  United Kingdom
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quick question regarding the inductors (120uf) From farnell i can only find a choke with self resonant frequency of 10khz.

could i jumper the choke, the RC filter remains.
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