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Old 14th August 2011, 09:45 PM   #11
Pano is online now Pano  United States
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J-P. I don't see why you couldn't use other transformers, tho they would probably need to go off-board. The CS4398 is pretty tolerant of different loads. I've talked engineers at Cirrus looking for the "ideal load" but they won't go any further than saying it's spec'd for a 1K load. I've found it isn't too picky.
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Old 14th August 2011, 10:14 PM   #12
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Of course this is possible but it would spoil the view on this beautifully designed board.

Seriously, I am fond of "one PCB" solutions with good supplies etc. More of this please ! Modular designs are very 2010 I really don't see the point of a few PCB's when everything can be on one board skipping the need for those dreaded cable harnesses etc. But I have a problem with ASRCs... everybody keeps telling me they're good but I would have to hear the first one sounding natural. Could be me of course.
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Old 14th August 2011, 11:23 PM   #13
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J-P and Pano -

The board is designed for the Lundahl transformers, but before I finalized the design I looked around at all the various output transformers I'd want to use: Jensen, Onetics, Lundahl, etc. And none of them had the same footprint. I tried to drop lots of pads down and tried to make the board capable of different designs, but it got really messy. Plus there's lots of other good options like UTC that wouldn't be catered to with the layout. So I bailed on that, and just went with the Lundahls.


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Old 22nd August 2011, 02:12 AM   #14
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Hi Sheldon,

I like your board, nicely designed with a good PSU and great local decoupling.

How does the board handle 24/192 or 176.4 does the 8421 automatically bypass?

Also how easy would it be to add an additional AES input and SPDIF? The input selection can be handled by a rotarty type selector I suppose. Where do the Spare tracks for the cs8416 present on the board.

What type of transformer output are you using and where do I get hold of them?

Thanks in advance,

George.
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