Mark,
I think I am with you, sort of......My comprehension of very OLD
solid/one wire was very early 10/base2(?). Coax. I could be really wrong
here! But, I am sure we are all way beyond this technology.
I clearly understand the "surfaces" business of multi-wire newer net
cables. I'm sure some scientist could rail solidly about all the
capacitive and inductive BS going on in my cat5/6 cables. LOL! I leave
all the transmission theory to my switches and NICS to deal with. So
far; it is all good.
I have been told that telephone wire is relatively large in gauge
because it needs to pass large a...@45v to do ring/dial-tone. Actual
signal/voice business travels along the surface of whatever conductor is
present.
Best,
Duncan
Mark wrote:
Solid core, one wire to travel around like you say, multiple or
stranded wire has more sufaces for the cage effect to get mucked up,
altho it usually bends with out breaking opposed to solid core, it
does not do well with network signaling. You will need switches, not
hubs, every 100 meters and at least one repeater to do the full 700.
-----Original Message-----
From: DSinc <[email protected]> Sent: Jun 25, 2009 2:08 PM To:
[email protected] Subject: Re: [H] Networking, distance,
etc
Rick, Thank you. I do understand the "Faraday skin effect." Still,
I'm not sure how this really matters. Electricity always travels on
the outer surface of any conductor. Rarely through the bulk/core of
the conductor. But, I will go read some more and check out your
links.......... :) Perhaps my 1970's RADAR training missed
something. Best, Duncan
Rick Glazier wrote:
From: "DSinc"
But, I still do chafe at the "solid-core" business. Most of the
cat5/6 cables I have looked at do NOT use "solid-core" wire. I
mostly see multiple-strand (tiny) copper wire.
I just looked this up recently on another list, in a different
context. That is called the a Faraday skin effect, (shield, cage,
effect, etc...) <http://en.wikipedia.org/wiki/Faraday_cage> One
site I was to had nice animated graphics of what happens.
Rick Glazier
Mark Dodge
