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Co-ax SPDIF digital out



 
 
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  #11 (permalink)  
Old November 30th 03, 09:32 AM posted to uk.rec.audio
Jim Lesurf
external usenet poster
 
Posts: 3,051
Default Co-ax SPDIF digital out

In article , BWGames
wrote:
On Sun, 30 Nov 2003 00:14:07 +0000 (UTC), in uk.rec.audio, Jim H wrote:


more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special type?


Only if you belive the exotic cable salesmen! Any normal phono lead
should be fine, the quality of the cable for digital can be lower
even than for analogue.


Thanks - I've been putting standard phono in (2 for stereo and one for
video), so I only need one now for digital audio for my HTPC setup.


Strictly speaking, the cable should have a 75 Ohm characteristic impedance,
and many phono leads intended for analog interconnects won't have this
impedance. That said, provided the cable is short (metre or so) this is
unlikely to give a problem.

For peace of mind, though, I tend to recommend using a length of 75 Ohm
co-ax of one of the types usually sold for TV and VHF antenna leads. Of
course, not all such leads *will* be 75 Ohm at frequencies below a MHz..
;- So this comes back to "probably doesn't matter much" in most domestic
situations.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html
  #12 (permalink)  
Old November 30th 03, 11:38 AM posted to uk.rec.audio
RJH
external usenet poster
 
Posts: 93
Default Co-ax SPDIF digital out


"BWGames" wrote in message
news
On Sun, 30 Nov 2003 00:14:07 +0000 (UTC), in uk.rec.audio, Jim H wrote:

more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special type?


Only if you belive the exotic cable salesmen!
Any normal phono lead should be fine, the quality of the cable for

digital
can be lower even than for analogue.


Thanks - I've been putting standard phono in (2 for stereo and one for
video), so I only need one now for digital audio for my HTPC setup.

*wonders what to use spare phono for*
--
BWGames
to email change de.news to de-news


I've used 10 metres of normal phono cable - seemed to work fine. What's
'lost' then, according to the manufacturers of these digital link cables?

Rob


  #13 (permalink)  
Old November 30th 03, 11:38 AM posted to uk.rec.audio
RJH
external usenet poster
 
Posts: 93
Default Co-ax SPDIF digital out


"BWGames" wrote in message
news
On Sun, 30 Nov 2003 00:14:07 +0000 (UTC), in uk.rec.audio, Jim H wrote:

more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special type?


Only if you belive the exotic cable salesmen!
Any normal phono lead should be fine, the quality of the cable for

digital
can be lower even than for analogue.


Thanks - I've been putting standard phono in (2 for stereo and one for
video), so I only need one now for digital audio for my HTPC setup.

*wonders what to use spare phono for*
--
BWGames
to email change de.news to de-news


I've used 10 metres of normal phono cable - seemed to work fine. What's
'lost' then, according to the manufacturers of these digital link cables?

Rob


  #16 (permalink)  
Old November 30th 03, 03:46 PM posted to uk.rec.audio
Mike
external usenet poster
 
Posts: 20
Default Co-ax SPDIF digital out

Jim H writes:

more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special type?


Only if you belive the exotic cable salesmen!
Any normal phono lead should be fine, the quality of the cable for digital
can be lower even than for analogue.


Better to use a 75 ohm cable, for instance RG-59 or television cables
(better small diameter like I401).
Using a normal audio cable could not work in some circumtances.
(and I pay I401 0.50 eur/m at the hardware store).

Mike

  #17 (permalink)  
Old November 30th 03, 03:46 PM posted to uk.rec.audio
Mike
external usenet poster
 
Posts: 20
Default Co-ax SPDIF digital out

Jim H writes:

more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special type?


Only if you belive the exotic cable salesmen!
Any normal phono lead should be fine, the quality of the cable for digital
can be lower even than for analogue.


Better to use a 75 ohm cable, for instance RG-59 or television cables
(better small diameter like I401).
Using a normal audio cable could not work in some circumtances.
(and I pay I401 0.50 eur/m at the hardware store).

Mike

  #18 (permalink)  
Old November 30th 03, 04:08 PM posted to uk.rec.audio
Jim H
external usenet poster
 
Posts: 247
Default Co-ax SPDIF digital out

more from the 'Jim Lesurf school' of uk.rec.audio-ism:

In article , BWGames
wrote:
On Sun, 30 Nov 2003 00:14:07 +0000 (UTC), in uk.rec.audio, Jim H
wrote:


more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special
type?

Only if you belive the exotic cable salesmen! Any normal phono lead
should be fine, the quality of the cable for digital can be lower
even than for analogue.


Thanks - I've been putting standard phono in (2 for stereo and one
for video), so I only need one now for digital audio for my HTPC
setup.


Strictly speaking, the cable should have a 75 Ohm characteristic
impedance, and many phono leads intended for analog interconnects
won't have this impedance. That said, provided the cable is short
(metre or so) this is unlikely to give a problem.


I've never experianced any problems using them interchangeably, possibly
because some of my 'analog' cables are 75Ohm. Could this cause problems?

--
Jim H jh
@333
.org
  #19 (permalink)  
Old November 30th 03, 04:08 PM posted to uk.rec.audio
Jim H
external usenet poster
 
Posts: 247
Default Co-ax SPDIF digital out

more from the 'Jim Lesurf school' of uk.rec.audio-ism:

In article , BWGames
wrote:
On Sun, 30 Nov 2003 00:14:07 +0000 (UTC), in uk.rec.audio, Jim H
wrote:


more from the 'BWGames school' of uk.rec.audio-ism:

Does this transmit over standard phono cable or need a special
type?

Only if you belive the exotic cable salesmen! Any normal phono lead
should be fine, the quality of the cable for digital can be lower
even than for analogue.


Thanks - I've been putting standard phono in (2 for stereo and one
for video), so I only need one now for digital audio for my HTPC
setup.


Strictly speaking, the cable should have a 75 Ohm characteristic
impedance, and many phono leads intended for analog interconnects
won't have this impedance. That said, provided the cable is short
(metre or so) this is unlikely to give a problem.


I've never experianced any problems using them interchangeably, possibly
because some of my 'analog' cables are 75Ohm. Could this cause problems?

--
Jim H jh
@333
.org
  #20 (permalink)  
Old November 30th 03, 05:12 PM posted to uk.rec.audio
Dave Plowman
external usenet poster
 
Posts: 735
Default Co-ax SPDIF digital out

In article ,
Mike wrote:
Better to use a 75 ohm cable, for instance RG-59 or television cables
(better small diameter like I401). Using a normal audio cable could not
work in some circumtances. (and I pay I401 0.50 eur/m at the hardware
store).


Any normal length phono cable will work ok - you might get in problems
with very long runs with audio co-ax, though.

--
*How do you tell when you run out of invisible ink? *

Dave Plowman London SW 12
RIP Acorn
 




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