On Fri, 06 Feb 2004 18:53:45 +0000 (GMT)
Dave Plowman wrote:

No problem. Use co-ax rather than optical - it's cheaper.

'scuse me? I picked up a 3m optical cable for 6ukp.

Right. I'd just make up one of the correct length. Haven't tried with
optical. Does it solder easily?

the SPDIF ones are plastic. a scalpel would probably suffice.

they were selling 12m ones for ~20 IIRC.

Oxygen free glass?

what, LESS than 50p/metre and you're complaining?

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

On Fri, 6 Feb 2004 14:53:42 +0000, Ian Molton wrote:

No problem. Use co-ax rather than optical - it's cheaper.

'scuse me? I picked up a 3m optical cable for 6ukp.

they were selling 12m ones for ~20 IIRC.

OK, use it because it's better then. Until amplifiers and players
have lightpipes instead of wire inside, there's going to be a
conversion from electrical signal to light and a conversion back at
the other end. This isn't going to INCREASE quality, is it.

On Sat, 07 Feb 2004 16:18:55 +0000
Laurence Payne wrote:

No problem. Use co-ax rather than optical - it's cheaper.

'scuse me? I picked up a 3m optical cable for 6ukp.

they were selling 12m ones for ~20 IIRC.

OK, use it because it's better then. Until amplifiers and players
have lightpipes instead of wire inside, there's going to be a
conversion from electrical signal to light and a conversion back at
the other end. This isn't going to INCREASE quality, is it.

Not likely to decrease it either, is it?

buit the optic fibre isnt going to transmit electrical noise is it?

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

On Sat, 7 Feb 2004 18:25:44 +0000, Ian Molton wrote:

OK, use it because it's better then. Until amplifiers and players
have lightpipes instead of wire inside, there's going to be a
conversion from electrical signal to light and a conversion back at
the other end. This isn't going to INCREASE quality, is it.

Not likely to decrease it either, is it?

buit the optic fibre isnt going to transmit electrical noise is it?

Sure. It'll transmit whatever you feed it. Hopefully :-)

You mean "pick up", not "transmit" of course.

Digital signals are relatively immune to noise. What they DO suffer
from is clock jitter and waveform corruption of various kinds, I
think.

On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:
hello.

I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could run
six metres.

No problem. I've run 30' feet using rg58 with perfect results.



Is this way out or is this possible?

Thanks

J

"TCS" wrote in message

On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:
hello.

I'd like to run a digital out from my DVD player to a DAC. How long
can this cable be? I can use a coaxial or an optical. I was hoping
it could run six metres.

No problem. I've run 30' feet using rg58 with perfect results.

Ironically, that's the wrong impedance stuff. RG59 is the *proper* stuff for
digital audio. I don't doubt that the 58 worked fine at that length.

On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:

hello.

I'd like to run a digital out from my DVD player to a DAC. How long can
this cable be? I can use a coaxial or an optical. I was hoping it could run
six metres.

Is this way out or is this possible?

Thanks

J
First off, use Coax.
Second, any old piece of crap phono leed will do. As for length I'm
guessing 6m will not be a problem as the signal is digital. If you can
hear a sound with no skips or breaks, then the cable is working
perfectly.


Ray.

Nutter wrote in
:



On Fri, 6 Feb 2004 13:06:49 +0000 (UTC), Jay wrote:

hello.

I'd like to run a digital out from my DVD player to a DAC. How long
can this cable be? I can use a coaxial or an optical. I was hoping it
could run six metres.

Is this way out or is this possible?

Thanks

J
First off, use Coax.
Second, any old piece of crap phono leed will do. As for length I'm
guessing 6m will not be a problem as the signal is digital. If you can
hear a sound with no skips or breaks, then the cable is working
perfectly.


Ray.




Excellent. Cheers for the help, people.

I have another question, though. I'll start a new thread....

j

On Fri, 06 Feb 2004 15:16:55 +0000
Nutter wrote:

First off, use Coax.

Or, better, use optic fibre which is just as cheap and eliminates any possibility of transmitting electrical noise between components.

Second, any old piece of crap phono leed will do.

For short lengths. and it really *ought* to be 75 ohm, too. That said, 6m probably counts as short.

As for length I'm
guessing 6m will not be a problem as the signal is digital.

Digital pulses can be *harder* to transmit due to being square waves. just because its digital doesnt make it easier. What it does mean is that if the signal is at all recoverable at the other end it will work *perfectly* (well, close to perfectly in the case of SP/DIF...).

If you can hear a sound with no skips or breaks, then the cable is working perfectly.

Not necessarily. a DAC could well conceal small errors in the signal.


--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

On Fri, 6 Feb 2004 16:59:49 +0000, Ian Molton wrote:

On Fri, 06 Feb 2004 15:16:55 +0000
Nutter wrote:

First off, use Coax.

Or, better, use optic fibre which is just as cheap and eliminates any possibility of transmitting electrical noise between components.

Bull****! Tell be where you can get a 10m Optical cable for £1? Which
if you go to Maplins is all it would cost you in parts to make a
perfectly suitable coax digital.


Second, any old piece of crap phono leed will do.

For short lengths. and it really *ought* to be 75 ohm, too. That said, 6m probably counts as short.

No - For any length! In fact for long lengths your only option is
Coax.

As for length I'm
guessing 6m will not be a problem as the signal is digital.

Digital pulses can be *harder* to transmit due to being square waves. just because its digital doesnt make it easier. What it does mean is that if the signal is at all recoverable at the other end it will work *perfectly* (well, close to perfectly in the case of SP/DIF...).


If you can hear a sound with no skips or breaks, then the cable is working perfectly.

Not necessarily. a DAC could well conceal small errors in the signal.

Only it you've got a crap DAC, or the errors were so small as to make
no difference to the audible sound if the errors were not 'concealed'.
In any case, I challenge anyone to do a blind test and tell the
difference between Coax and Optical.