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-   -   Co-ax SPDIF digital out (https://www.audiobanter.co.uk/uk-rec-audio-general-audio/1047-co-ax-spdif-digital-out.html)

Jim Lesurf November 30th 03 08:32 AM

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

RJH November 30th 03 10:38 AM

Co-ax SPDIF digital out
 

"BWGames" wrote in message
...
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



RJH November 30th 03 10:38 AM

Co-ax SPDIF digital out
 

"BWGames" wrote in message
...
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



tony sayer November 30th 03 11:05 AM

Co-ax SPDIF digital out
 
In article , Jim H jh_really_hates
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.


In fact we've managed 100 metres of CT100 satellite cable without any
noticeable loss of fi.

Course this was dunked in snake **** before the event!.....
--
Tony Sayer


tony sayer November 30th 03 11:05 AM

Co-ax SPDIF digital out
 
In article , Jim H jh_really_hates
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.


In fact we've managed 100 metres of CT100 satellite cable without any
noticeable loss of fi.

Course this was dunked in snake **** before the event!.....
--
Tony Sayer


Mike November 30th 03 02:46 PM

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


Mike November 30th 03 02:46 PM

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


Jim H November 30th 03 03:08 PM

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

Jim H November 30th 03 03:08 PM

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

Dave Plowman November 30th 03 04:12 PM

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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