On Mon, 20 Mar 2006 19:00:16 -0500, Dave wrote:

Owen Duffy wrote:

SNIPPED

Ok, but again you can measure the impedance anywhere and knowing line
parameters, calculate Z at any other point.

Owen
--

Owen, I don't disagree with you. But, IMO, it is beyond Bob Miller's
expertise/knowledge, at this point in his ham experience, to perform
those calculations.

I didn't perform those calculations until my 3rd year in engineering school.

KISS, and fix it at the source.

Dave, there is no doubt that the closer you are to the antenna, the
less error introduced by tolerance on line parameters. On the
otherhand, the instrumentation / user can be disruptive or real
inconvenient.

As for the calcs, one can be lazy and use
http://www.vk1od.net/tl/tllce.php (if one's cable type is supported).

My antenna analyser can't do the calcs internally, I don't know if
some can, but it would be a pretty handy feature.

Owen
--