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Old 8th April 2013, 11:07 PM   #2671
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Quote:
Originally Posted by GOR3 View Post
I posted mechanicals for the S/PDIF Board on the Group Buy thread. It's post #632 on September 9, 2012. Please use these with caution. I am not an ME; not even close. When I used these to make my case, I had to make liberal use of a file to get things to fit properly. Whatever you do, don't send them to Front Panel Express and expect joy. My suggestion would be to use the drawings to make a mock-up out of heavy paper, test it, and make adjustments before a drill bit touches metal.
Best regards,
George
Thanks George .

Quote:
Originally Posted by TheShaman View Post
I'd be interested in the SPDIF board drill pattern as well - though at the moment I'm leaning towards an all-Neutrik back panel with wires going to the SPDIF board.
So, who's George?
Quote:
Originally Posted by mcluxun View Post
Hey all
I'm trying to make a case of this kit including the spdif board.
Did any one make a drill pattern for spdif board before?
I searched this thread but didn't get any luck.
Here is the detail SPDIF board PCB dimensions, just hope it helps.

Regards,

Ian
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File Type: png SpdifDimensions.png (112.7 KB, 519 views)
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Old 9th April 2013, 04:58 PM   #2672
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Thanks George & Ian!
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Old 16th April 2013, 03:37 AM   #2673
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Default Set up 3.2V LiFePO4 direct battery PSU as a reference for Si570

As I mentioned a couple of weeks ago, the key thing to Si570 is the PSU. But to achieve a better result, what we need to do the first is setting up a reference. Each change will get compare with the reference to decide improved or not.

LiFePO4 battery cell is a good candidate. The 3.2V output can power si570 board directly. Battery comes with very low noise. But it doesn’t mean battery must be the best, because noise comes from three parts: DC power, regulator (include voltage reference) and the load. Battery wires and the high frequency active load can still make noise.

To power si570, higher capacity battery cell would be a better choice. I got a couple of 26650. I wanted to source some A123, but A123 was discontinued for a long time. I don’t think the ones I’m using are as good as A123, for I just use them as reference, so I don’t concerned much about that.

Steps (Please see the pictures for details):

1. Short the input and output of external LDO connector with a jumper (included in the KIT).

2. Must include an isolator board between FIFO and the clock board.

3. Connecting one LiFePO4 battery cell to the DC input connector J2 of the si570 board via a battery management board.

Some comments:

1. Magnet ring is suggested for the battery cable because the load frequency could be very high and wires are too long in this case.

2. If it is possible, try to monitor the battery by a passive voltage meter to avoid any damage caused by over discharge.
Attached Images
File Type: jpg ShortLDO.JPG (254.2 KB, 389 views)
File Type: jpg IsolatorAndBM.JPG (473.7 KB, 277 views)
File Type: jpg BatteryDirectReferenceSystem.JPG (412.0 KB, 282 views)
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Last edited by iancanada; 16th April 2013 at 03:41 AM.
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Old 16th April 2013, 05:16 AM   #2674
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Quote:
Originally Posted by iancanada View Post
I wanted to source some A123, but A123 was discontinued for a long time.
Hi Ian,

ive got my A123 ANR26650m1-B yesterday!

Didnt you have a A123 source in Canada?

Best,
Oliver
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Last edited by dvb projekt; 16th April 2013 at 05:23 AM.
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Old 16th April 2013, 12:37 PM   #2675
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Quote:
Originally Posted by dvb-projekt View Post
Hi Ian,

ive got my A123 ANR26650m1-B yesterday!

Didnt you have a A123 source in Canada?

Best,
Oliver
Hi Oliver,

I can not source any A123 26650 in Canada. Where did you get yours?

Is there any possible I buy a couple from your? But the problem is how can you ship batteries to Canada?

Regards,

Ian
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Old 16th April 2013, 12:53 PM   #2676
Nikitas is offline Nikitas  Greece
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It is possible if you write on the box that they're not restricted, if these actually are not restricted.

Check "provision a67" and "special provision 238 adr" and "un 2800".

I also can't source these batteries. I have sent 2 emails to a123 about resellers but received nothing back.
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Old 16th April 2013, 01:26 PM   #2677
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Finding a source of genuine a123s is almost impossible... I had to buy one of those DeWalt 36V batteries to make sure the ones I use for the precious DACs are OK, that is a way for a DIY guy who doesn't need more than a few to get them fast and expensive
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Old 16th April 2013, 02:17 PM   #2678
Nikitas is offline Nikitas  Greece
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Do you mean the battery pack for drills? Nice! I didn't know those had a123 inside!

Edit: I see some very bad reviews on amazon.com
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Old 16th April 2013, 02:54 PM   #2679
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Yes, battery packs for drills, I am not sure if the new ones are the same but mine had 10pcs. of a123 cells inside that were genuine for sure. The packs do fail a lot though but when they work the DeWalts are simply monsters. A123 had some bigger batteries too that held great promise in a lot of areas, it was really sad they went down.
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Old 16th April 2013, 04:55 PM   #2680
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Quote:
Originally Posted by iancanada View Post
Hi Oliver,

I can not source any A123 26650 in Canada. Where did you get yours?

Is there any possible I buy a couple from your? But the problem is how can you ship batteries to Canada?

Regards,

Ian
Hi Ian,

i have posted a few informations in my blog about my source
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