BUILD THREAD - A New Take on the Classic Pass Labs D1 with an ESS Dac - Page 47 - diyAudio
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Old 1st December 2012, 10:17 PM   #461
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Default GB parts change to Buzzborb

Hi OPC,
Could you please try to read my PM (sent two weeks ago) and tell us what to expect? Both me and Buzzborb.
Thanks and sorry for (ab)using your time,
Ed
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Old 2nd December 2012, 11:25 PM   #462
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Quote:
Originally Posted by ed linssen View Post
Hi OPC,
Could you please try to read my PM (sent two weeks ago) and tell us what to expect? Both me and Buzzborb.
Thanks and sorry for (ab)using your time,
Ed
Buzz F orb of course, sorry!
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Old 3rd December 2012, 12:04 AM   #463
opc is offline opc  Canada
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Read and replied!

Unfortunately the boards shipped out long before you guys decided to swap so it will have to make the trip back across the ocean to buzzforb in the USA once it arrive in the EU.

Cheers,
Owen
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Old 19th January 2013, 02:56 PM   #464
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Hey Owen - I was wondering if you ever built this enclosure? Based you your approach, I drafted a similar case. Dimensions will be 11in deep by 16in (ID) wide and 6in tall. Total width is between 20in and 24in, depending on if heatsink extensions are installed. I found some unique heatsink on eBay for this.

With the height, I partitioned it as two 3in levels. Heatsinks were $35 each, and raw 6061 aluminum came to $166. Wouldn't even tell you what it's costing me to have is milled, drilled, tapped and polished. I'll just say that I'll not be going 'all in' on a case like this until I build up a small shop with the gear I need to do it myself.

Anyway, as much as I've enjoyed the NTD1, it'll be worth it. Case should be assembled by the end of next week. I'll post pictures
Quote:
Originally Posted by opc View Post
Hi Guys,

I drew up a quick model of what my plans are for the DAC, so everyone can get an idea of where I'm going with mine.

For reference, the bottom plate is 0.5" thick, the whole DAC is about 12.5"wide by 12.25" deep and 3" high

I'm going to use Aavid 65535 extrusions cut to 3" lengths for the sides.

The 1" by 1" bars will transfer heat from the bottom plate to the sinks, and the whole thing should run pretty cool.

The .zip attachment is the Google Sketchup file.

Cheers,
Owen
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Old 21st January 2013, 02:16 PM   #465
adelias is offline adelias  Greece
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I thought that I would post a few photos of my DAC in its current state. Although not completed by any means, I believe its close.
Attached Images
File Type: jpg P1000904s.jpg (272.8 KB, 286 views)
File Type: jpg P1000902s.jpg (970.5 KB, 280 views)
File Type: jpg P1000900s.jpg (893.5 KB, 250 views)
File Type: jpg P1000899s.jpg (649.9 KB, 240 views)
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Old 21st January 2013, 04:03 PM   #466
opc is offline opc  Canada
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Wow! I am green with envy!

That is by far the cleanest implementation of the NTD1 I've seen to date.

Wanna make me one?

Mine is still a tangled mess of wires in my media cabinet

How are the thermals? Does it run at a decent temp?

What is the deal with the output arrangement? I can't quite figure out from looking at it how you hooked it up.

Cheers,
Owen
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Old 21st January 2013, 06:04 PM   #467
adelias is offline adelias  Greece
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Quote:
Originally Posted by opc View Post
How are the thermals? Does it run at a decent temp?

What is the deal with the output arrangement? I can't quite figure out from looking at it how you hooked it up.
After running it for 8 hours the temps seemed acceptable.

The output has a relay that serves as a pass-thru for my surround processor when the DAC is turned off.
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Old 22nd January 2013, 12:01 AM   #468
qusp is offline qusp  Australia
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looking good adelias, only one thing I can see, I see a familiar coax cable type that if it is what I think it is, its magnetic.
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Old 22nd January 2013, 12:22 AM   #469
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I've search the thread but can't find the answer, could someone help?

Can the NTD1 output be connected as SE (unbalance)?
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Old 27th January 2013, 08:24 PM   #470
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I was planning to use a single transformer for the NTD1 power supply but make a secondary for each supply.

Please let me know if good enough. Also, I am planning for voltage drop for the regulators but want to make sure the safety margin is good enough. I don`t want the regs having to drop too much voltage since I don`t want them to overheat but don`t want them to sag either.

Dual Primary 115/230Vac - 250VA total
Quad Secondaries 41Vac (ea. 55VA) + dual secondary 9Vac (ea. 15VA)

Of course shielded encapsulated.

Anybody have part numbers (Digikey, Mouser, etc) for the BII/BIII headers to the NTD1 PCB?

Thanks
Do
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