On Sun, 28 Aug 2005 09:39:24 -0700, dansawyeror
wrote:

Wes,

As a starter, look at this site:

http://www.cbtricks.com/~ab7if/coax/coax.htm

snip

My second claim is when the mismatch condition at the coax destination, i.e.
antenna that may result in significant radiation from the coax itself.

Dan

Well, Dan, responding to your second claim first, consider either of
two situations,
1) center-fed dipole, fed with open wire line, or
2) a center fed dipole, fed with coax with an efficient choke balun.
In either of these situations an impedance mismatch between the
feedline and the dipole will NOT cause radiation from the feedline.

And taking a look at the web site you referenced above, the writer is
professing to clear some misconceptions concerning transmission line
technique. However, although he does present some straight dope, he
is also further spreading some misconceptions concerning SWR.

As he stated, there is a lot of misunderstanding concerning the effect
of line length on the amplitude of the standing wave, but he continued
the incorrect information on the subject, rather than presenting a
correction.

The fact is, Dan, that with lossless line the SWR is NOT affected by
the line length--it remains constant along the entire length of the
line. And further, the ONLY affect of line length on SWR is line
attenuation, which causes the SWR at the input to be less than that at
the load.

If you believe everything you read in that reference, you've been
duped.

Walt, W2DU