On Sat, 07 Feb 2004 13:17:37 +0000, Nutter wrote:

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.

10 metres of cable and two phono plugs for £1? Which Maplin is that?

In message , Wally
writes
Nutter wrote:

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.

Why is it that, when someone asks a newbie question about cables, some
arsehole thinks that the most suitable solution for them is to buy raw
materials and solder one up 'because it's cheaper'? How long would it take
for a newbie to source and acquire the parts - and the tools - and make up
the cable? How many goes would it take for them to get it right? All that
****ing around to save a fiver? I once watched (and occasionally helped) a
mate build a sports car in his garage. Next time somebody asks me about what
sort of sports car he should get, I'll tell him to make his own, right?

To view it from the other perspective, someone who can solder up their own
cables isn't going to come to an audio group and ask a newbie question about
cables - they're just going to go and get on with making one.


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!

What a load of ****. Do you know what an "ohm" is?


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



I'm sure he does, but it seems you don't. The 75 or 50 Ohms is nothing
to do with resistance. It's the impedance seen by the wavefront as it
travels down the cable, and is a function of the inductance and
capacitance of each tiny segment of cable. (Calculus and all that!)

As the old saying goes: A little learning etc..


--
Chris Morriss

Chris Morriss wrote:

I'm sure he does, but it seems you don't. The 75 or 50 Ohms is
nothing to do with resistance. It's the impedance seen by the
wavefront as it travels down the cable, and is a function of the
inductance and capacitance of each tiny segment of cable. (Calculus
and all that!)

What is the unit of impedance?

What is the characteristic impedance of "any old piece of crap phono leed".


As the old saying goes: A little learning etc..

Try a little reading.


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

In message , Wally
writes
Chris Morriss wrote:

I'm sure he does, but it seems you don't. The 75 or 50 Ohms is
nothing to do with resistance. It's the impedance seen by the
wavefront as it travels down the cable, and is a function of the
inductance and capacitance of each tiny segment of cable. (Calculus
and all that!)

What is the unit of impedance?

What is the characteristic impedance of "any old piece of crap phono leed".


As the old saying goes: A little learning etc..

Try a little reading.


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




True, I hadn't looked far enough back up the thread.

:-(
--
Chris Morriss

Chris Morriss wrote:

True, I hadn't looked far enough back up the thread.

It was quoted in the post you replied to, as was the idiot's claim that
any-old-crap phono lead would do "For any length!". As soon as I read the
thick **** saying that, I immediately thought of a 100m drum of the stuff.
Then I remembered that BT used to have repeaters in their early PCM systems
and found myself wondering why. Then I realised that he was spouting total
****e.


:-(

:-)


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

To view it from the other perspective, someone who can solder up their own
cables isn't going to come to an audio group and ask a newbie question about
cables - they're just going to go and get on with making one.


Hi-fi users, who have been brainwashed into believing in "magic"
interconnects, may need reminding that standard components and
learning a simple skill is an excellent alternative.

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!

What a load of ****. Do you know what an "ohm" is?

I suspect you think it's a simple measurement of resistance. Not so,
with cables carrying high-frequency signals.

On Sat, 07 Feb 2004 18:13:22 +0000, Laurence Payne
wrote:

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!

What a load of ****. Do you know what an "ohm" is?

I suspect you think it's a simple measurement of resistance. Not so,
with cables carrying high-frequency signals.

OK, I've just read back the thread too :-)

Practically-speaking, short lengths of damp string often work.
Longer lengths need the right cable. Why would YOU say this was?

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 Sat, 07 Feb 2004 19:36:09 +0000
Laurence Payne wrote:

*PLEASE* read through the thread and spare me explaining AGAIN...

once more with feeling, short form.

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

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

No. I mean transmit. and shielded coax is not going to pick up much at all.

what it can do is transmit any noise present in the source to the DAC.

Digital signals are relatively immune to noise.

No argument there. however the analogue gear in the DAC is most certainly not, and will pick up anything that isnt nailed down and filtered from the input.

What they DO suffer
from is clock jitter and waveform corruption of various kinds, I
think.

Not what Im takling about in this instance, but yes.

--
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.