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Old 11th June 2012, 04:27 PM   #1061
opc is offline opc  Canada
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No worries... I won't ruin compatibility with either the BII or the Acko. I mostly just want to add a few point for the power tot he DAC itself. I'll probably leave the digital input area as-is since I don't think I can make it compatible with both the BII and BIII, and I'm guessing those with a BIII will probably just run the intended ribbon cable to the intended MUX.

Cheers,
Owen
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Old 11th June 2012, 04:50 PM   #1062
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Thanks for looking after us Owen! You know acko now mentions the D1 as one of the IV options in the latest update to his site.

The other thing that isn't immediately obvious but the 5V supply to the BIII needs something like nearly double the current of a BII from memory, I haven't done the sums on it but I would bet that reg would need some changes along with a larger heatsink perhaps now too?
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Old 11th June 2012, 05:55 PM   #1063
qusp is offline qusp  Australia
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cool! my thoughts exactly, but I bet it was my moaning that changed your mind right?
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Old 11th June 2012, 06:03 PM   #1064
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I was planning to post a picture of my OwenD1+ackoDAC+ExaU2I but I still haven't finished the details of the final build. Since it might never be final, better post them now. And for reference I have included the btesting board for the ODAC on the left placed on the transformers.
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Old 11th June 2012, 07:05 PM   #1065
Salomon is offline Salomon  Germany
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I do not think that the new layout should be compatible with BII, because no one will get a new BII DAC.
With the old NTD1 board you only can mount the BIII with the ribbon cable side to the power supply. For short cables maybe it would be a good idea to mount the BIII with Ribbon cabe to the other side.
Or you mount it like me. See my pictures.

With a mounted BIII DAC it is not necessary to have an SPDIF transformer or a input socket on the new board, because the BIII needs a additional comparator board (Level Converter Kit).The BIII only understands TTL Level and no Consumer SPDIF level.
The additional Comparator board has one or four SPDIF transformers.
You get two different versions (one or four inputs).
If you only need two inputs, you do not need the original input switch. You can make it like me with a little switch (on the back side).
Be sure to make the ribbon cable as short as possible. With long ribbon cables between BIII and the Level Converter you get sometimes audio dropouts.
Most if you switch a lamp or something other on or off.

The most important thing for the sound quality are the four output couplers!!
Owen, it would be fine to get more space for bigger (and better) output capacitors on the new board.
But you do not need to make it for me. I am ready with my DAC and I love it!

I use a combination of a very good KP-Capacitor 2,2 F, a 56nF silver glimmer capacitor (New old stock from Jahre) and a Black Gate N bipolar 100F/50V (red version).
Yes I know you will get no more Black gate N now .But I got four pcs 2 years before. The Black Gates are making the biggest sound difference (with / without).
The sound is very amazing with much micro detail and good dynamic!!

I use the DAC with 750 / 400 Ohm Source and Drain resistors unstead of 400 / 200 Ohm
The sound is still very very good and I get less heat.

It is a good idea to take the bigger (higher) SK104-63,5 STS for the LM317 /337 and not the SK104-38 STS
The SK104-38 heat sink of the 5,25V stabilizer becomes very hot. I think it is because the BIII together with the level Converter Kit need more current then a BII alone. Please take a bigger case for your DAC with bigger heat sinks on the left and the right side.

Where are all the builders who got a board with the first group buy?

The BIII combined with this FET single ended output stages is one of the best DACs in the world!!
I am very sure. The sound is very amazing with good output capacitors.

Please see my pictures (post #428 and #432)

BUILD THREAD - A New Take on the Classic Pass Labs D1 with an ESS Dac

I would like to write more here in this thread to help you, but sorry my english is not the best.

Last edited by Salomon; 11th June 2012 at 07:12 PM.
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Old 11th June 2012, 07:14 PM   #1066
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Quote:
Originally Posted by Salomon View Post
I do not think that the new layout should be compatible with BII, because no one will get a new BII DAC.
Salomon,

What are you talking about... Don't just think about you here... The established BII base is way bigger than the BIII, it just does not make any sense to kick every BII out, don't you think?

I do get your point that going forward you can't buy a BII but no one can justify selling a BII to buy a BIII... It does not sound any different or improve much aside the 8 channels... What would make sense is the Ackodac and even then...

See Qusp post about this. It would mean a big redesign of the board and delay things even further...

Do
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Old 11th June 2012, 07:50 PM   #1067
Salomon is offline Salomon  Germany
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ok, if there are many BII owners who are waiting for a NTD1, then Owen should make the new boards same as first circuit design with a SPDIF transfomer on the board.
I dont know. I thought all the BII owners got there boards with the first group buy.

I do not think only of myself! I only want to help other builders to improve the performance of the new board!
I do not want do say more about this project.
It is not easy for me to right down all the informations in english. Maybe I should do other things.

Last edited by Salomon; 11th June 2012 at 07:53 PM.
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Old 11th June 2012, 08:27 PM   #1068
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Quote:
Originally Posted by Salomon View Post
ok, if there are many BII owners who are waiting for a NTD1, then Owen should make the new boards same as first circuit design with a SPDIF transfomer on the board.
I dont know. I thought all the BII owners got there boards with the first group buy.

I do not think only of myself! I only want to help other builders to improve the performance of the new board!
I do not want do say more about this project.
It is not easy for me to right down all the informations in english. Maybe I should do other things.
Ok, was a little rough on you I guess... Sorry if I insulted you in any way

Many BII owners missed the first GB or were not even aware the NTD1 existed in the first place. Sure it would be nice to accommodate all of us and in the end, Owen will most probably try his best to please as many people as possible, I'm sure.

Do
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Old 11th June 2012, 08:41 PM   #1069
qusp is offline qusp  Australia
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oh great, way to muddy the waters salomon

Several of the first GB are back for a second board including myself. I would like proper inputs, but I did not suggest it, all this time; at the time of the first run there were only 2 of us using it, so it was not a realistic option and actually its a little problematic unless you mount the regulators for the dac above the dac board. Now there is quite a few starting to get around; it still doesnt make it less awkward, but I havent really given it much thought.

the builders from the first gb, there were a few who posted pics..in the build thread and the original thread and it wasnt that large a group, but as mentioned many missed out as they were not aware. i'm not against catering for the new dac, but catering for the digital input is madness and why? so you can add another connection in the signal path, one pin header is already bad enough for a digital signal.

you already need to buy an spdif comparator, as I mentioned already, to have a usable spdif dac at the time of purchase, so you are sorted already, do you suggest another uC as well, maybe a buffer and comparator?

i'm just trying to avoid a flood of suggestions here, just because opc said he would make a change to allow mounting, does not make it open season. he has already said what he thinks and you contradict him? how about you lay a board out?

Last edited by qusp; 11th June 2012 at 09:03 PM.
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Old 11th June 2012, 08:57 PM   #1070
qusp is offline qusp  Australia
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Quote:
Originally Posted by Nikola Krivorov View Post
I was planning to post a picture of my OwenD1+ackoDAC+ExaU2I but I still haven't finished the details of the final build. Since it might never be final, better post them now. And for reference I have included the btesting board for the ODAC on the left placed on the transformers.
nice work Nikola!!

haha I relate to the bolded part, this phase of my build is a real attempt to draw a line under the dac and move forward, but we'll see how realistic that is
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