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Old February 1st 10, 04:54 PM posted to rec.radio.amateur.antenna
Jeff[_10_] Jeff[_10_] is offline
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First recorded activity by RadioBanter: Jan 2010
Posts: 13
Default Cable Shielding Misunderstandings

Lostgallifreyan wrote:
Richard Clark wrote in
:

I like their discussion on materials (which fits my own
view on that subject), and on types of RG6. I just started in on the one
about 'quad screens'.

This is called confirmatorial bias which means you justify a thought
on the basis of having found a source that repeats it back to you.


No. It's called 'go see for yourself and tell me based on YOUR judgement if
it's worth revisiting'. If all I wanted was a pat on the head I wouldn't even
have provided a link. Either that info has technical merit, or it doesn't in
which case perhaps you should berate THEM and not me! You expect me to fully
understand details beyond need, yet you won't even take a look at something
signposted right in front of you is an adequate source of info to learn from.
If you can't do that much, why should I trust your judgement? I'll make up my
own mind anyway. Between my efforts, and the other posts here, I have got my
answers.

Face up to the disillusion being presented in this painted into the
corner scenario you are in. The cheapest cable will probably work as
best as any sensible solution has to offer, simply because your
perceived situation hasn't any prospect of being solved by that choice
of line, or any other.


Well, that's just nonsense. Grandstanding nonsense at that. You just baldly
stated that no cable can fix whatever my problem might be, purely because YOU
can't see what it is. You're painting me into a corner. I'm trying to get out
of one. There's no technical point in what you just said. At least I try.
With your knowledge, you should know better.

Other people here, (and in the pages I linked to but you didn't apparently
see) have shown that foil can be so bad, either from tearing, or dubious
contact, that it's unwise to use it except in fixed situations where you know
it will be ok, and not for someone who is likely to want to reuse a cable
while trying new ideas, or to grab more off the reel to try something else.
I've seen that RG6 types vary so much that there's no point citing its name.
Considering I never used to, and already knew that 75 ohms is a result of
precisely controlled sizes and manufacturing tolerances, I was probably
better off before I saw people telling me that distinctions between RG6 and
RG59 were important. Their context isn't the same as mine. My needs are more
likely to be satisfied by a BT data coax than a satellite coax.


As a matter of interest why are you looking at 75ohm cable, when most
people and equipment use 50ohm.

Jeff