For a moderatly complete study of twisted pair ingress/egress see:

http://www.comsoc.org/sac/private/2002/june/pdf/20jsac05-stolle.pdf#search='twisted%20pair%20ingress'

Get those calulators out.

Please note that this studies much higher levels of "RF" then the
typical SW receiver will be
"see". So what is acceptable for a networking or telco environment, may
not be acceptable
for a receiving use.

A comparison betweent the details int his link and the coax link:
http://www.tennadyne.com/pdf/coaxial_tenn.pdf
could be educational.

Or maybe not, after all some people still insist the world is flat.....

Enjoy!

Terry

wrote in message
Or maybe not, after all some people still insist the world is flat.....
or twisted...
Good stuff, Terry.

Tom

R2000SW & TH,

The World is a Cork-Screw and the Universe is . . .
a Bottle of Wine - Drink-Up ! ) ~ RHF

In article ,
"Tom Holden" wrote:

wrote in message
Or maybe not, after all some people still insist the world is flat.....
or twisted...
Good stuff, Terry.

Twisted pair or coax are just engineering solutions to a problem. Both
have their place depending on what you want to accomplish, money spent,
et cetera.

--
Telamon
Ventura, California

Telamon wrote:
In article ,
"Tom Holden" wrote:

wrote in message
Or maybe not, after all some people still insist the world is flat.....
or twisted...
Good stuff, Terry.

Twisted pair or coax are just engineering solutions to a problem. Both
have their place depending on what you want to accomplish, money spent,
et cetera.

--
Telamon
Ventura, California
++++++++++++++++++++++++
I wasn't trying say that coax is always "better" then twisted, but
after the 150
nonesense posts on the subject I wanted to dump some reality based math

on the subject.

As I have pointed out before in this NG, even coax can suffer from
ingress.
It just has a lot less then any balanced line I have experimented with.

I use balanced audio, video, data and networking, lines everyday at
work and
at home. But for low level RF distribution I have found that coax,
triax or twinax
beats any sort of balanced line when it comes to keeping iterference
out.

I still wish the proponenets on both sides would just string ~100' of
each type
line out, terminate properly, couple to the receiver properly, ie use a
transformer
to convert the balanced to unbalanced, and see which has the most
"stary" signal
pickup.

I want to do every thing I can to make sure that my 1uV signal from my
antenna
doesn't get smoothered in crud before it gets into my receiver. I get
enough crud
from the electronic crap that surrounds me.

Terry