Thanks for the reply and example John. I was referring to the loss in
power when operating into a high SWR with coax VS a high impedance
line like twinlead / ladder line / open wire. Someone in a post here
mentioned it was mainly current losses and that piqued my interest.
Cecil answered my question and gave me the formula. In his example the
coax was carrying about 3 times the current of the 450 Ohm ladder
line, which explains it.

73 Gary

On Fri, 13 May 2005 21:47:40 -0700, "John Smith"
wrote:

Gary:

This question is out of my league, suspect Roy will be able to answer with
no problem--probably a lot of the others too...

However, in my expermenting, I have adusted the match at an antenna fed with
300 twin lead (causing a high SWR) while watching Field Strength on a meter
which was positioned so it could only "see" a good section of the
feedline... you could watch radiation from the feedline go up with SWR--I
cringe when they say coax has even more "loss"--or perhaps this is not the
"loss" you mean...

Warmest regards,
John