OK, continuing in my rôle as one of the group's principal firestarters* I
just thought I would mention that only last night I saw the most convincing
evidence for 'decent' interconnects.

I've just treated No. 1 son (2 HNDs but no job...) to a projector - *very
highly* recommended, see...

http://www.apah69.dsl.pipex.com/keit.../bigscreen.jpg

....and compare the theoretical maximum image in his room with his 28" telly
(the blurry grey thing at the bottom of the (his) picture. - No contest!!

Anyway, up 'till I took some half decent phono cables (Qunex, IIRC) down
last night he's been using it with a red/white/yellow bootlace cable on
Component Video. We swapped the cables last night and *kaboom* - wot a
difference!! Much, much sharper, if nothing else!

OK, I know this is video and not audio (don't even know if Component Out is
analogue or digital!) but if this upgrade could much such an improvement,
surely the same goes for audio information? (I might be a bit lost
discerning nuances in sound quality differences but I got no problem with
visuals!)

Also I would mention that there was/is no significant difference in picture
quality between a £40 Chy Knees DVD** (daren't say Chinky any more!! :-)
and a much more expensive Japper Knees machine (Sony 725 or summat
similar).....

(Unable to report any difference in audio quality, however.....)


* My back gate is probably burning as I type (having started to strip the
paint off it)!

**Actually now only £30 from Lidl's for the exact same machine (with
Component Out and Progressive Scan plus *all the usual features) - loopy
VFM!!!

Keith G wrote:

Anyway, up 'till I took some half decent phono cables (Qunex, IIRC)
down last night he's been using it with a red/white/yellow bootlace
cable on Component Video. We swapped the cables last night and
*kaboom* - wot a difference!! Much, much sharper, if nothing else!

OK, I know this is video and not audio (don't even know if Component
Out is analogue or digital!) but if this upgrade could much such an
improvement, surely the same goes for audio information? (I might be
a bit lost discerning nuances in sound quality differences but I got
no problem with visuals!)

What's the frequency of a video signal?


--
Wally
www.artbywally.com
www.wally.myby.co.uk

On Fri, 6 Aug 2004 17:17:47 +0100, "Wally"
wrote:

Keith G wrote:

Anyway, up 'till I took some half decent phono cables (Qunex, IIRC)
down last night he's been using it with a red/white/yellow bootlace
cable on Component Video. We swapped the cables last night and
*kaboom* - wot a difference!! Much, much sharper, if nothing else!

OK, I know this is video and not audio (don't even know if Component
Out is analogue or digital!) but if this upgrade could much such an
improvement, surely the same goes for audio information? (I might be
a bit lost discerning nuances in sound quality differences but I got
no problem with visuals!)

What's the frequency of a video signal?

Roughly, DC to 5.5MHz.

d

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

"Keith G" wrote in message


Anyway, up 'till I took some half decent phono cables (Qunex, IIRC)
down last night he's been using it with a red/white/yellow bootlace
cable on Component Video. We swapped the cables last night and
*kaboom* - wot a difference!! Much, much sharper, if nothing else!

Cables are frequency-sensitive at frequencies way, way higher than audio.

OK, I know this is video and not audio (don't even know if Component
Out is analogue or digital!) but if this upgrade could much such an
improvement, surely the same goes for audio information? (I might be
a bit lost discerning nuances in sound quality differences but I got
no problem with visuals!)

Depending on what you're pushing down that CVI cable, we could be talking
signals up to 200 MHz or more. That's 10,000 times higher than the highest
nominal audio frequency.

Also I would mention that there was/is no significant difference in
picture quality between a £40 Chy Knees DVD** (daren't say Chinky any
more!! :-) and a much more expensive Japper Knees machine (Sony 725
or summat similar).....

Same argument. OTOH, the the £40 wonder, just might be a POS.

"Arny Krueger" wrote


Same argument. OTOH, the the £40 wonder, just might be a POS.


Certainly it could. See:

http://www.reviewcentre.com/reviews9887.html

and you tell me.....

(Plenty of other results from whiners who have had a poor experience with
them, but you do wonder about 'Pilot Error' with these types.....)

Hi,

In message , Wally
writes
Keith G wrote:

Anyway, up 'till I took some half decent phono cables (Qunex, IIRC)
down last night he's been using it with a red/white/yellow bootlace
cable on Component Video. We swapped the cables last night and
*kaboom* - wot a difference!! Much, much sharper, if nothing else!

OK, I know this is video and not audio (don't even know if Component
Out is analogue or digital!) but if this upgrade could much such an
improvement, surely the same goes for audio information? (I might be
a bit lost discerning nuances in sound quality differences but I got
no problem with visuals!)

What's the frequency of a video signal?

Much, much higher than an audio signal. But you knew that :-)


--
Regards,
Glenn Booth

In article ,
Keith G wrote:
Anyway, up 'till I took some half decent phono cables (Qunex, IIRC) down
last night he's been using it with a red/white/yellow bootlace cable on
Component Video. We swapped the cables last night and *kaboom* - wot a
difference!! Much, much sharper, if nothing else!

A red white yellow cable is designed for short runs of stereo audio and
composite video - like from a games machine into the front of the TV.

'Serious' video should use proper video cable. In the same way as you'd
use decent aerial cable for an aerial. Or a 1.5mm extension lead for an
electric heater - not bell wire. Nothing magical at all.

--
*The man who fell into an upholstery machine is fully recovered.*

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

On Fri, 6 Aug 2004 16:56:06 +0100, "Keith G"
wrote:

Anyway, up 'till I took some half decent phono cables (Qunex, IIRC) down
last night he's been using it with a red/white/yellow bootlace cable on
Component Video. We swapped the cables last night and *kaboom* - wot a
difference!! Much, much sharper, if nothing else!

Yes, you'd reasonably expect that. A red/white/yellow cable is a
crappy device intended for connecting stero audio and composite video,
and is most certainly *not* suitable for component video, where you
should be using three 75-ohm cables of the same length.

OK, I know this is video and not audio (don't even know if Component Out is
analogue or digital!) but if this upgrade could much such an improvement,
surely the same goes for audio information? (I might be a bit lost
discerning nuances in sound quality differences but I got no problem with
visuals!)

No, the same does *not* go for audio. Component video is analogue,
unlike HDMI and DVI, which are digital. Analogue video signals run up
to 1,000 times higher in frequency than audio, which not surprisingly
makes a difference. You can easily tell differences among video
cables, but no one has *ever* been able to prove an ability to *hear*
differences among cables.

Also I would mention that there was/is no significant difference in picture
quality between a £40 Chy Knees DVD** (daren't say Chinky any more!! :-)
and a much more expensive Japper Knees machine (Sony 725 or summat
similar).....

There are detectable video differences among DVD players, but
presumably these aren't two of them! :-)
--

Stewart Pinkerton | Music is Art - Audio is Engineering

In article ,
Stewart Pinkerton wrote:

You can easily tell differences among video
cables, but no one has *ever* been able to prove an ability to *hear*
differences among cables.

I thinks you've left out 'adequately specced cables'. Some old valve
equipment had high output impedance, and using some interconnects could
result in a treble loss. You can also get effects with some types of
pickup cartridges.

--
*In some places, C:\ is the root of all directories *

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

On Sat, 07 Aug 2004 09:29:42 +0100, "Dave Plowman (News)"
wrote:

In article ,
Stewart Pinkerton wrote:

You can easily tell differences among video
cables, but no one has *ever* been able to prove an ability to *hear*
differences among cables.

I thinks you've left out 'adequately specced cables'. Some old valve
equipment had high output impedance, and using some interconnects could
result in a treble loss. You can also get effects with some types of
pickup cartridges.

To actually get treble loss from an interconnect, its characteristic
impedance must be lower than the terminating impedances. Most
(excluding woven Goertz) speaker cable has a characteristic impedance
in the 70 to 100 ohm range, and can't possible cause such an effect.
Of course you may reduce the treble *lift* inherent in such cables.

Of course at lower audio frequencies the impedance deviates markedly
from that value by virtue of resistive terms becoming dominant, but
the change is still higher, rather than lower impedance, so the top
cut still can't happen.

d

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