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Valve DAC from Linear Audio volume 13
Valve DAC from Linear Audio volume 13
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Old 14th September 2020, 06:51 AM   #861
Mikky1975 is offline Mikky1975  Italy
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Thanks Ray, just PMed you!

Many thanks to you and the whole community.

Mirko
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Old 14th September 2020, 07:42 AM   #862
nautibuoy is online now nautibuoy  United Kingdom
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Having exchanged PMs with Mikky1975 we have clarified his requirements and I have adjusted the GB spreadsheet accordingly.

As it turns out he only wants one PCB so I have one left if there are any more lurkers out there? I won't be running another GB so this may be the last opportunity.

Also, an apology - in slotting Mikky1975 into the spreadsheet I realised that I had omitted to include the cost of the smd stencil so the figures for the smd soldering service have increased a little - sorry about that.
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Old 14th September 2020, 05:52 PM   #863
nautibuoy is online now nautibuoy  United Kingdom
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I posted another set of bare PCBs to Pistolerro this afternoon. Only one more set of bare boards to dispatch once I get a delivery address from dubulup.

The boards I posted last week should be landing very soon.
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File Type: jpg Capture.JPG (192.0 KB, 141 views)
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Old 14th September 2020, 10:34 PM   #864
spm is offline spm  United Kingdom
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Boards arrived today.
Look very good.
Now the fun begins!
Thank you.
Simon
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Old 15th September 2020, 03:35 AM   #865
agent.5 is offline agent.5  United States
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Having spent a bit of time laying out the boards last couple weeks, this is what I have so far. A 4 layers pcb for the isolators and a separate 2 layers power supply board, that the isolator pcb can plug onto. I may have gone a bit crazy on the via fences. But this is what Analog does on the EVM. So, I just copy it. In addition to revised schematics, based upon Marcel's advices, I have the 3D renderings of the top and bottom of the two pcbs, and separate printouts of each copper layers. On the 4 layers board, the inside layer 1 is ground and insider layer 2 is power. But, it is mostly ground anyway, as I used traces instead of a pour. I also did a little adapter board to P13. Suggestions?
Attached Images
File Type: png B2V-3D-Top.png (401.0 KB, 119 views)
File Type: png B2V-3D-Bottom.png (332.8 KB, 116 views)
File Type: png B2V-F_Cu.png (141.2 KB, 126 views)
File Type: png B2V-In1_Cu.png (74.0 KB, 30 views)
File Type: png B2V-In2_Cu.png (78.0 KB, 23 views)
File Type: png B2V-B_Cu.png (77.1 KB, 22 views)
Attached Files
File Type: pdf B2V.pdf (279.7 KB, 21 views)
File Type: pdf B2V-PSU.pdf (77.1 KB, 10 views)

Last edited by agent.5; 15th September 2020 at 03:42 AM.
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Old 15th September 2020, 03:37 AM   #866
agent.5 is offline agent.5  United States
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There are more files of the power supplies.
Attached Images
File Type: png PSU-3D-Top.png (271.7 KB, 30 views)
File Type: jpg BBB-PSU-3D-Bottom.jpg (99.2 KB, 35 views)
File Type: png PSU-F_Cu.png (57.6 KB, 32 views)
File Type: png PSU-B_Cu.png (121.8 KB, 28 views)
File Type: png B2V-closeup.png (491.8 KB, 35 views)
File Type: png PSU-closeup.png (347.7 KB, 37 views)

Last edited by agent.5; 15th September 2020 at 04:04 AM.
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Old 15th September 2020, 04:26 AM   #867
agent.5 is offline agent.5  United States
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wow that was quick. I think that I already found an error. R3 should be next to U3 than U5.
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Old 15th September 2020, 05:45 AM   #868
nautibuoy is online now nautibuoy  United Kingdom
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Quote:
Originally Posted by spm View Post
Boards arrived today.
Look very good.
Now the fun begins!
Thank you.
Simon
Great. Have fun.
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Old 15th September 2020, 05:54 AM   #869
nautibuoy is online now nautibuoy  United Kingdom
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Quote:
Originally Posted by agent.5 View Post
...this is what I have so far.
Interesting.

I've only had a quick look at your attacments and sorry if this has been covered before; I don't see any oscillators?

What sort of separation distance (i.e. Ethernet cable length) between the two boards are you envisaging?

Correction: Ah, I see, external oscillators via J10 & J11

Last edited by nautibuoy; 15th September 2020 at 06:00 AM. Reason: Correction
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Old 15th September 2020, 07:51 AM   #870
rfbrw is offline rfbrw
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Quote:
Originally Posted by nautibuoy View Post
The boards I posted last week should be landing very soon.
Boards turned up monday morning. Thanks and much kudos to you and MarcelvdG.
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