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Old 26th April 2013, 05:00 AM   #101
grufti is offline grufti  United States
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Much improved numbering and silk screen. You have also managed to include at least one curious "feature": R8 is written mirrored, but then again it looks like you have it underneath. I wonder how that came about. The long ES9023 are very cool. J2 is another nice idea.
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Old 26th April 2013, 05:22 AM   #102
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Finlay Got somme new es9023, so now i just nede the rest . Anyone who have a shopping list from farnell, mouser or similar I Can copyright to save halv an houer of frustration clikking around after parts ?
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Old 26th April 2013, 06:10 AM   #103
Mull3t is offline Mull3t  United States
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How do I get on the list for this project? Would a board and ES9023 be supplied or do I need to look elsewhere for the ES9023?
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Old 26th April 2013, 08:49 AM   #104
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Originally Posted by grufti View Post
Much improved numbering and silk screen. You have also managed to include at least one curious "feature": R8 is written mirrored, but then again it looks like you have it underneath. I wonder how that came about. The long ES9023 are very cool. J2 is another nice idea.
R8 and also R141 and R151 are indeed on the bottom side of the board, thus the mirrored names . Now that I have received the boards I realized that my supplier puts silkscreen on both sides without extra charge
R8 is underneath to gain some space for a filmcap as an alternative to the C701 Elcap (or Oscon,...).
To be honest, I would indeed love to have more layers available. However having the overall cost in mind I think for the ES9023 the two layer board is a realy good go (I managed to realize an uninterupted GND layer ). For a next project (ADC with RIAA) I will definately have to switch to 4 layers...

Currently there is no groupbuy so there is no waiting list. I have ordered some boards and will do tests within a closed group of a few people. I have some spare boards that I can provide to some of the current beta tester (I will contact you by PM!).
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Old 5th May 2013, 08:40 PM   #105
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Default New board up and running

I'm just listening to the new board and I am very pleased with the sound. Compared to the first Version I have the feeling of improved timing and clarity. But most of all I love the timbre - voices have great colour and cymbals sound clear and have body (mmh, I am really not the best at describing my impressions ).
I will send out some betaboards soon (all boards are reserved, sorry) and quite a few people will listen to the DAC at the Frickelfest. Looking forward to hear some comments from other listeners

Best regards, Daniel
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Old 5th May 2013, 10:15 PM   #106
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Fantastic Daniel! Did the build go well? spacing? silk scenes? polarity?
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Old 6th May 2013, 02:41 AM   #107
grufti is offline grufti  United States
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Looks great! Can't wait to try it!

I don't recognize your USB board? It looks nice and even smaller than the Amanero. Which one is it?
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Old 8th May 2013, 07:24 AM   #108
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Quote:
Fantastic Daniel! Did the build go well? spacing? silk scenes? polarity?
Build went very well. The new pad layout for the ES9023 proved to be very convenient to add decoupling Cs very close to the IC. I used 10nF NPO + 2F X7R (0603) directly at the IC for AVCC and NEG supply.
Silkscreen is correct this time

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I don't recognize your USB board? It looks nice and even smaller than the Amanero. Which one is it?
It's the miniSTREAMER from miniDSP, a TE7022 based USB to I2S/SPDIF converter.
Due to the synchronous USB transfer it seems to be a little outdated if you follow the discussions here in the forum but I think it's a decent performer. It will probably benefit a lot from the devided MCLK from my ES9023 board as well as from external power supply (not USB powered). I'll try that later. Currently I am terribly busy
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Old 21st May 2013, 12:20 AM   #109
Mull3t is offline Mull3t  United States
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@curryman Is there a way to tap the DAC XO on the v2 and send it to RCLK on an Acko Isolator/Re-clocker board for what Acko is calling pseudo-sync mode? Otherwise, I'd have to go with an external clock like Acko's new clock board and send that to the re-clocker which then would feed MCLK on the DAC board. Acko is calling this sync mode. I'm assuming I'd leave the XO off the DAC at this point. What other parts would I leave off? Also what is the MCKL:4 used for? Is it for S/PDIF clocking?

Otherwise, I'm thinking of doing Async mode and going with isolation only from the Acko board. This mode would be best if I only want to go for isolation.
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Old 21st May 2013, 08:06 AM   #110
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@curryman Is there a way to tap the DAC XO on the v2 and send it to RCLK on an Acko Isolator/Re-clocker board for what Acko is calling pseudo-sync mode?
There is a MCLK In/Out header on board that could be used to feed external circuits with onboard XO signal. Just place a suitable R at J2 position (0603 case).

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Otherwise, I'd have to go with an external clock like Acko's new clock board and send that to the re-clocker which then would feed MCLK on the DAC board. Acko is calling this sync mode. I'm assuming I'd leave the XO off the DAC at this point.
Would be possible too. Just don't stuff the XO to the DAC board and close J2 to feed external MCLK to ES9023

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What other parts would I leave off? Also what is the MCKL:4 used for? Is it for S/PDIF clocking?
If you don't use onboard XO you don't need the corresponding power supply (regs, Cs,...) of course. MCLK 1:4 is indeed intended for SPDIF or USB receiver, e.g. TENOR or WM8804 which need 12MHz clock (use 48MHz XO for ES9023 in this case). If you don't want to use the 1:4 option you don't need to stuff the flipflops and the corresponding power supply (regs, Cs, Ls,...)

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Otherwise, I'm thinking of doing Async mode and going with isolation only from the Acko board. This mode would be best if I only want to go for isolation.
All of the above options would be very interesting tests. Would be nice to see if the the amanero reclocker performs better than the internal recocking of the ES9023. I thought just using isolation might be the best in this case but who knows...

Best regards, Daniel
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