Doug, N4IJ, wrote:

... As for the comment that the feedline would be
part of the antenna at that long of a run, that
was part of the original post, and my worrying
about the antenna intself unbalancing the feedline.
The way I understand it, the feedline should not
radiate or be part of the antenna if it is balanced.

I think that given the length of your run (275 ft) and
the use of close-spaced commercial "window line", any
common-mode problems on the line would sort themselves
out before they got back to your shack. Giving the
line a relatively tight twist (1 twist/6 inches) might
help too.

Given that you intend to drive a relatively non-directional
antenna, I don't think feedline radiation will be a big
problem system-wise if it is 1/10 the total radiated power.
(ie: suppressed 10 dB).

Nobody wants to take me up on the unbalanced ladder-line.
Oh, well!

Jim, K7JEB
Glendale, AZ