Lundhal LL1572

Paco · 27th November 2007, 11:42 AM

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

mgm31 · 15th February 2008, 01:54 PM

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.

mgm31 · 28th February 2008, 07:02 AM

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

27th November 2007, 11:42 AM	#1
Paco diyAudio Member Join Date: Aug 2003 Location: Cordoba	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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15th February 2008, 01:54 PM	#2
mgm31 diyAudio Member 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.

28th February 2008, 07:02 AM	#3
mgm31 diyAudio Member 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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