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.