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Old 27th November 2007, 11:42 AM   #1
Paco is offline Paco  Spain
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Join Date: Aug 2003
Location: Cordoba
Default Lundhal LL1572

Hi all,
I've bought a couple of those transformers and I have a doubt. Should they be used only when there are problems or they will give a sonic improvement on a non problematic SPDIF connection?
Best regards,
Paco
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Old 15th February 2008, 01:54 PM   #2
mgm31 is offline mgm31  France
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Join Date: Sep 2005
Location: Toulouse
I've bought one yesterday and plan to use on a AES / EBU interface input with CS8414.

Take care as this transformer is designed for 110 ohms operation (AES / EBU), I don't know if this can work with SPDIF 75 omhs with a 75 omhs resistor on the secondary.

For my point of view, pulse transformer help to break ground loop and keep the differential input of the AES / EBU.

Any advice is welcome.
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Old 28th February 2008, 07:02 AM   #3
mgm31 is offline mgm31  France
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Join Date: Sep 2005
Location: Toulouse
I plugged it yesterday in my CS4398 DAC.

I removed the normal stuff and replace it with this transformer + 110 ohms resistor on the secondary directly connected to pins 9 and 10 of the CS8414.

Working fine, the error led of the CS8414 remains off. I can't say if the sound is improuved as I changed from spdif to aes / ebu.

Seems that can be used with spdif (75 ohms) input.

http://www.lundahl.se/pdfs/datash/1572_1573_1589.pdf
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