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Old 4th April 2013, 07:22 AM   #641
atupi is offline atupi  Romania
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Sounds good, waiting for JP's updates.
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Old 4th April 2013, 07:50 AM   #642
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Hi Subbu

Nice to read you've shipped V3 Beta PCB to builders.
I may say RC, Realease Candidate, vs Beta.

You say "Sounds pretty good", could you elaborate ?
Did you use Jean Paul LM723 based PSU too ?

I was hoping to read much more from you after such a long time

From what I've read about V3 DAC, I can say :
1 - V3 DAC uses 0805 & 1210 parts, no smaller 0603 type parts to deal with
2 - 4 ultra low noise LDO (3.3V & 3.6V) as used in improved V2.6
3 - U.FL connectors pads added for I2S input
4 - More left space for non SMD caps alternative : Polymer/Electrolytic/Film
5 - Circuit Design & PCB traces optimized by "Moderator Emeritus" (invaluable input)
6 - SE Version is almost complete, final testing in progress.

Well, the end of waiting is close to ending.
More to come with pics and details, hope it will be soon now

Phil
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Old 4th April 2013, 08:22 AM   #643
massimo is offline massimo  Italy
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For the v.3 BOM you might consider a different (and possibly better) LDO reg such as this: http://www.ti.com/lit/ds/symlink/lp2985-n.pdf now available in SOT23 P2P compatible package and 3.6V.
Being a low Zout reg (0.3ohm), low ESR caps can be used at its o/p (MLCC vs Tantalum). Noise 30uV (300Hz-50kHz). Slightly worse PSRR, but we can rely on a low noise pre-reg
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Old 4th April 2013, 09:01 AM   #644
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LP2985 is not an improvement.
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Old 4th April 2013, 12:04 PM   #645
syklab is offline syklab  Hong Kong
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May be the TI LP5907, spec looks ok but no 3.6V.

Last edited by syklab; 4th April 2013 at 12:13 PM.
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Old 4th April 2013, 12:27 PM   #646
Turbon is offline Turbon  Sweden
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OK, I'm in. Exciting to compare this to other implementatins of the 9023...
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Old 8th April 2013, 10:31 AM   #647
billyk is offline billyk  United States
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Bump for some news!
Any more built? What are the builders general impressions?
Looking forward to adding this to my set-up!
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Old 8th April 2013, 10:37 AM   #648
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Patience is the key...

This dac is like a good wine - the longer you wait the better it gets ...
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Old 8th April 2013, 03:13 PM   #649
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Quote:
Originally Posted by voxxonline View Post
Patience is the key...

This dac is like a good wine - the longer you wait the better it gets ...
And there's also nothing wrong with a good vinegar
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Old 8th April 2013, 03:30 PM   #650
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TBH I would like to know if any bom has been proposed, as I am on hold for my other parts due to Mouser minimum quantities policy. Will do everything in one go.

Plus I am getting JG Filter buffer, has anyone tried it with 9023 and directly into amp via pot or something similar, bypassing passive or active amp all together..?
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