In article ,
Anton Gijsen wrote:
I don't think that anybody that knows how digital audio is transmitted
would believe that *any* digital cable will make a difference.
AES-EBU and SP-DIF signals are incredibly rugged, and provided the
cable is of 75 ohms impedance, what it's made of and how constructed
will have *no* effect on the signal transmitted.

Can some kind soul please tell me what the impedance of a "normal"
analogue phono-phono cable is?

It doesn't matter since domestic audio connections aren't matched. They
will be typically something like a 50 ohm output and a 50 kohm input.
Unlike video which is usually 75 ohms in and out.

However, most co-ax cable used for phono circuits will be centred around
75 ohms.

--
*Oh, what a tangled website we weave when first we practice *

Dave Plowman London SW
To e-mail, change noise into sound.

In article , Dave Plowman (News)
wrote:


However, most co-ax cable used for phono circuits will be centred around
75 ohms.

My recollection is that the values for 'audio' analog coaxs tend to be for
capacitances in the range from below 100pF/m to around 600 pF/m. This
implies a wide range of impedances - even if we ignore the effects of the
cable resistances, etc, which will change the values in a frequency
dependent manner at audio frequencies.

Fortunately, it doesn't matter much. :-)

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

In article , Anton
Gijsen wrote:
Serge Auckland wrote:

I don't think that anybody that knows how digital audio is transmitted
would believe that *any* digital cable will make a difference.
AES-EBU and SP-DIF signals are incredibly rugged, and provided the
cable is of 75 ohms impedance, what it's made of and how constructed
will have *no* effect on the signal transmitted.

Can some kind soul please tell me what the impedance of a "normal"
analogue phono-phono cable is?

Not really, since it will vary from one example to another. Domestic audio
co-ax is not specified in terms of its impedance as that isn't normally
relevant. What *may* matter is the value for its capacitance per metre.
This is quoted in some catalogues - e.g. by Maplin. But tends not to be
mentioned in magazine 'reviews' sic of cables.

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

Jim Lesurf wrote:
In article , Anton
Gijsen wrote:
Serge Auckland wrote:

I don't think that anybody that knows how digital audio is transmitted
would believe that *any* digital cable will make a difference.
AES-EBU and SP-DIF signals are incredibly rugged, and provided the
cable is of 75 ohms impedance, what it's made of and how constructed
will have *no* effect on the signal transmitted.

Can some kind soul please tell me what the impedance of a "normal"
analogue phono-phono cable is?

Not really, since it will vary from one example to another.

Holy **** on a stick, guys! I didn't mean to start a friggin' argument.
What are you lot like?

The reason I asked is that I'm currently using a "normal" analogue
phono-phono cable as a digital cable between my CD player and AV amp,
and was wondering whether or not it was worth getting a "proper" 75 Ohm
impedance digital coaxial cable. Maybe if I could get hold of some phono
connectors that B&Q satellite coax cable would be good. Your thoughts...?

On Fri, 24 Nov 2006 16:29:56 +0000, Anton Gijsen
wrote:

Jim Lesurf wrote:
In article , Anton
Gijsen wrote:
Serge Auckland wrote:

I don't think that anybody that knows how digital audio is transmitted
would believe that *any* digital cable will make a difference.
AES-EBU and SP-DIF signals are incredibly rugged, and provided the
cable is of 75 ohms impedance, what it's made of and how constructed
will have *no* effect on the signal transmitted.

Can some kind soul please tell me what the impedance of a "normal"
analogue phono-phono cable is?

Not really, since it will vary from one example to another.

Holy **** on a stick, guys! I didn't mean to start a friggin' argument.
What are you lot like?

The reason I asked is that I'm currently using a "normal" analogue
phono-phono cable as a digital cable between my CD player and AV amp,
and was wondering whether or not it was worth getting a "proper" 75 Ohm
impedance digital coaxial cable. Maybe if I could get hold of some phono
connectors that B&Q satellite coax cable would be good. Your thoughts...?

If that is the question, the answer is really simple - no. You will
know if the impedance of a digital connection is a problem, because
you will get errors in the data stream that cause ticks and burps. If
you don't have any of these, you have a clean signal and the impedance
of the cable is not causing problems.

d

--
Pearce Consulting
http://www.pearce.uk.com

Anton Gijsen wrote:
Jim Lesurf wrote:
In article , Anton
Gijsen wrote:
Serge Auckland wrote:

I don't think that anybody that knows how digital audio is transmitted
would believe that *any* digital cable will make a difference.
AES-EBU and SP-DIF signals are incredibly rugged, and provided the
cable is of 75 ohms impedance, what it's made of and how constructed
will have *no* effect on the signal transmitted.

Can some kind soul please tell me what the impedance of a "normal"
analogue phono-phono cable is?

Not really, since it will vary from one example to another.

Holy **** on a stick, guys! I didn't mean to start a friggin' argument.
What are you lot like?

The reason I asked is that I'm currently using a "normal" analogue
phono-phono cable as a digital cable between my CD player and AV amp,
and was wondering whether or not it was worth getting a "proper" 75 Ohm
impedance digital coaxial cable. Maybe if I could get hold of some phono
connectors that B&Q satellite coax cable would be good. Your thoughts...?

That would be perfect. Just check that the cable is 75 ohm, not 50 ohms
and you're away.

By the way, There's a good chance that the "normal" phono-phono cable is
around 75 ohms. Also, on short lengths, even a bit of wet string will
work- literally. I've done it, and a few years ago, Canford Audio
demonstrated this at a couple of Trade Shows.

As to what we're like, we probably have too much time on our hands........

S.

In article ,
Anton Gijsen wrote:
Can some kind soul please tell me what the impedance of a "normal"
analogue phono-phono cable is?

Not really, since it will vary from one example to another.

Holy **** on a stick, guys! I didn't mean to start a friggin' argument.
What are you lot like?

The reason I asked is that I'm currently using a "normal" analogue
phono-phono cable as a digital cable between my CD player and AV amp,
and was wondering whether or not it was worth getting a "proper" 75 Ohm
impedance digital coaxial cable.

Does it work? Or produce crashing and banging noises? Because if a digital
connection like this sounds ok it is ok - there are no shades of grey.

Maybe if I could get hold of some phono
connectors that B&Q satellite coax cable would be good. Your thoughts...?

Pointless.

--
*Money isn‘t everything, but it sure keeps the kids in touch

Dave Plowman London SW
To e-mail, change noise into sound.

In article , Dave Farrance
writes
There was talk on another group about credulity and hugely expensive
cables. I was just wondering if *anybody* was prepared to say that they
believe the claims for a cable like this, for example:

http://www.russandrews.com/product.asp?pf_id=2565

"£797.00: KIMBER Select KS-2120 Digital Balanced

"KS-2120 not only uses the highest purity silver, it incorporates
KIMBER's latest discoveries in the nature of digital signals. The
result? Even more detail and even more music. You have to hear this
cable between your CD transport and DAC to appreciate the massive
improvements it can bring."


Can't help but think its time he had a run in with the trading standards
authority?..

But perhaps they must think anyone who believes all that bull**** must
need sectioning anyway!....
--
Tony Sayer

On Wed, 22 Nov 2006 18:34:37 GMT, Dave Farrance
wrote:

There was talk on another group about credulity and hugely expensive
cables. I was just wondering if *anybody* was prepared to say that they
believe the claims for a cable like this, for example:


"What Hi-Fi" December issue has a page reporting a testing session for
skeptics. See:
www.laurencepayne.co.uk/cables.html

They report the session fairly accurately, if selectively.

Throughout the magazine they continue to rave over magic cables. But,
to give due credit, several times they add "but see p.121 for another
opinion". I wonder if this qualification will persist in future
issues?

In article , Laurence Payne
lpayne1NOSPAM@dslDOTpipexDOTcom wrote:
On Wed, 22 Nov 2006 18:34:37 GMT, Dave Farrance
wrote:

There was talk on another group about credulity and hugely expensive
cables. I was just wondering if *anybody* was prepared to say that they
believe the claims for a cable like this, for example:


"What Hi-Fi" December issue has a page reporting a testing session for
skeptics. See: www.laurencepayne.co.uk/cables.html

They report the session fairly accurately, if selectively.

Throughout the magazine they continue to rave over magic cables. But,
to give due credit, several times they add "but see p.121 for another
opinion". I wonder if this qualification will persist in future issues?


Interesting that it is presented as "another opinion". i.e. Not presented
on the basis that actual evidence either fails to support, or contradicts
much of what they print. Or that they have no idea how to run a comparison
that might give reliable results. :-)

If you want a stark example of what Russ Andrews says, have a look at his
new 'column' sigh in 'Hi Fi News' this month. Given that he sells these
things I must confess I find it puzzling that he is now has such a column
which appears as *editorial* matter, not advertising, in such a magazine.
My reaction is that there is a conflict of interest, here.

BTW Dave, if you want to see a wider range of the kinds of views and
reactions people have to 'cables', then try a search back on this
group and some of the others. IIRC It has been a few weeks since we had
a 'local' argument about this. :-)

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