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Old 9th November 2013, 11:01 PM   #51
atupi is offline atupi  Romania
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Yes Jean-Paul, all 3 sounding great (two are for some friends). On one i'm using a 12mhz osc until i can source a 50mhz one. Those small smd oscillators seems to be temp sensitive.
I have bought looong time ago also a buffer from Joachim Gerhard wich is waiting to be connected

Thanks again Jean Paul for this really great sounding Dac.

Adrian
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Old 9th November 2013, 11:03 PM   #52
bcmbob is offline bcmbob  United States
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Congrats Adrian !! Gotta have that sound quality report,

Yes. a graphic of any sort would be appreciated.

JP, this may be asking a lot, but I think we all could use a description of those spots that allow options - all in a single post. Can you create a summation from both your builds and the significant reports from others like atupi? There will most likely be more adjustments in the future, but a little hand holding for those of us without great circuit chops would be appreciated at this start-up phase.
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Old 10th November 2013, 02:49 AM   #53
tofurky is offline tofurky  United States
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Default B1 in psu BOM

hey,
i started on the psu tonight. the mouser part (which i purchased ) listed for B1, 512-DF01S, doesn't seem right and also doesn't match the mfgr part W01G-E4/51.
512-DF01S is actually an SDIP-4 smd part. even with bending the leads for "through hole" it won't fit the footprint.

the correct mouser part seems to be 625-W01G-E4.

-matt

edit: i see that this was discussed already in the main GB thread

Last edited by tofurky; 10th November 2013 at 02:52 AM. Reason: searched gb thread
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Old 10th November 2013, 03:01 AM   #54
bcmbob is offline bcmbob  United States
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Did you choose the 240V B1. It's noted on the BOM. I got mine in the mail today and it's a perfect fit.
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Old 10th November 2013, 03:11 AM   #55
tofurky is offline tofurky  United States
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i'm not sure where this mouser # on the BOM came from, maybe it was carried over from an old BOM? the one i have is dated 8/22/13.
i need to order a fan from digi-key anyhow, so i'm going to order the correct one (the one you pictured) with that.
-matt
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Old 10th November 2013, 07:09 AM   #56
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Quote:
Originally Posted by bcmbob View Post
Congrats Adrian !! Gotta have that sound quality report,

Yes. a graphic of any sort would be appreciated.

JP, this may be asking a lot, but I think we all could use a description of those spots that allow options - all in a single post. Can you create a summation from both your builds and the significant reports from others like atupi? There will most likely be more adjustments in the future, but a little hand holding for those of us without great circuit chops would be appreciated at this start-up phase.
Start-up phase Wow that is something for a project running for more than a year in the third revision

Regarding options/other parts: regarding caps, I use whatever I have at hand and since I stock many caps I use what I have and what tests to perform good. Some of those are either hard to get or out of production like BG. Like the MAL cap which I have in stock, I guess I wouldn't have chosen those otherwise. Expensive, hard to find etc. just like its predecessor the Black Gate cap. I like the Silmic II too. Maybe that is one of the available caps that always perform well regardless of the device. You can't go wrong with Panasonic FC as well. Point is that I can not recommend what is not available. If you would like my opinion I will tell you to use BG NX HiQ (old news).

Also XO can be interchanged, Fox Xpresso (in the BOM) is good, Euroquartz XO91 are OK too. To be honest I think all has been discussed before and I want to finish this project as a new one is on the horizon. Maybe one of you has the time to bundle all info ? Most things that were valid for V2.6 are valid for V3. The BOM should be enough really.

V3 is a cheap DAC, better performing than competitors but still a cheap device. We can for instance debate for months which resistors to choose but IMO that is not the scope of the project. I understand that every individual building just one DAC will want to know what is best but if you are building example number 25 things get different. We ourselves use the coils, resistors, SMD beads and SMD ceramic caps that are in the BOM but we use different electrolytic/tantalum caps and different XO's now and then. Also PPS SMD caps were used before but I think they are too easily damaged from soldering so I stopped using those.
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Last edited by jean-paul; 10th November 2013 at 07:34 AM.
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Old 10th November 2013, 06:41 PM   #57
atupi is offline atupi  Romania
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Bob here is the picture.
What i was seeing is that you can check all voltages before powering up the chips. I belive is a safe approach. If all voltages are ok you can solder L3,4,5,6.
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Old 10th November 2013, 07:34 PM   #58
bcmbob is offline bcmbob  United States
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Thanks autpi. I'm past that point but it's a nice safety step for others just starting. I hope I don't get any stinky green smoke when I power up tomorrow.

JP, I wasn't clear enough in my earlier post. I should have said "new builders" not "start-up". Better?

Also, I wasn't asking for info on the many possibilities of parts in general. I was only referring to those places that have markings and/or clear definitions on the BOM. Should have defined "options" not "alternatives". The spots circled on the photo and the PS transformer 120v/230V + F1 selection were my targets. Not sure if those on the DAC should be consistent in package type, or if they can/should be mixed in the user tweaking process.
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Old 10th November 2013, 10:11 PM   #59
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It's a difficult language for native speakers it seems

Will answer tomorrow OK ?
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Old 10th November 2013, 11:15 PM   #60
GaryB is offline GaryB  United States
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I posted some comments about my experience building a prototype version 3 earlier this year. Take a look here:
"Subbu DAC V3 - ES9023/WM8804 SPDIF & Power Supply PCB" Group Buy

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