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Old February 7th 04, 04:29 PM posted to uk.rec.audio
Chris Morriss
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Posts: 530
Default Q: How long can I run a digital line?

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