S/PDIF Digital output

Katapum · 3rd November 2005, 10:21 PM

Hi all,

I have an Arcam Alpha 5 working only as a transport. I built a new digital output with a new Pulse transformer (see att. picture).

Any comments or suggestions are very welcome.

Katapum

Jocko Homo · 3rd November 2005, 11:13 PM

Comment: I don't like it.

Jocko

dddac · 4th November 2005, 04:57 AM

Quote:

Originally posted by Jocko Homo
Comment: I don't like it.

Jocko

would be nice to hear why and what you suggest ?

regards
doede

Calimero · 4th November 2005, 09:37 AM

http://www.diyhifi.org/forums/viewto...r=asc&start=90

Henk

dddac · 4th November 2005, 01:46 PM

Thanks! Worthwhile reading, answered my questions ..

regards
doede

Jocko Homo · 4th November 2005, 04:24 PM

I have already done that, many times, but let's start here:

What is the ouptput impedance?

Jocko

carlosfm · 4th November 2005, 08:55 PM

Quote:

Originally posted by Jocko Homo
I have already done that, many times, but let's start here:

What is the ouptput impedance?
Jocko

Ops... that signal is not attenuated to SPDIF (0.5V p-p) level...

Impedance? Not 75R for sure.

hifi · 4th November 2005, 09:40 PM

SAA7220P/B:s output impedance is not 0ohm

Jocko Homo · 5th November 2005, 12:22 AM

At least 2 of you guys have been paying attention.............

OK, assuming that he fixes those problems, what transformer is it?? All pulse transformers are not created equally. Most are useless for SPDIF.

If you don't believe me, try the one that comes stock in Philips CPDs. Designed to minimise EMI, not performance.

Jocko

Katapum · 5th November 2005, 06:55 AM

Hi,

Jocko Homo:

Pulse transformer is a PE-65612.

The original schematic will be better?

Katatapum

4th November 2005, 09:37 AM	#4
Calimero Banned Join Date: Aug 2003 Location: A farm on the prairie (protcted from foxes)	A good starting point is: http://www.diyhifi.org/forums/viewto...r=asc&start=90 Henk

4th November 2005, 01:46 PM	#5
dddac diyAudio Member Join Date: Jul 2003 Location: Wiesbaden	Thanks! Worthwhile reading, answered my questions .. regards doede __________________ www.dddac.de Happy listening and building

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3rd November 2005, 11:13 PM	#2
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	Comment: I don't like it. Jocko

4th November 2005, 04:24 PM	#6
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	I have already done that, many times, but let's start here: What is the ouptput impedance? Jocko

4th November 2005, 09:40 PM	#8
hifi diyAudio Member Join Date: Mar 2001 Location: sweden	SAA7220P/B:s output impedance is not 0ohm

5th November 2005, 12:22 AM	#9
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	At least 2 of you guys have been paying attention............. OK, assuming that he fixes those problems, what transformer is it?? All pulse transformers are not created equally. Most are useless for SPDIF. If you don't believe me, try the one that comes stock in Philips CPDs. Designed to minimise EMI, not performance. Jocko

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