Must take 1 hell of a winch to pull up 6" coax 1000'!
Actually, It takes two! One pushes it up from the bottom, the other (which is actually on the ground and very well tied down!) pulls it up from the top, via a big pulley! The top one has to run everso slightly faster than the bottom one, to avoid kinking the cable,
and believe me, you dont want to kink this stuff! Its not something you can simply shove a barrel connector on!
We buy this stuff cut exactly to the length needed, even forgetting to take account of the extra space needed for the connectors can totally ruin a job! Its not so bad if you've ordered it slightly long, but if its even a few millimeters short...
And when your pumping 50kW at 700MHz up it, you really dont want any extra loss, and certainly no impedence bumps!
Incidentally, our cable runs are about 1100ft up the tower, but the towers about 300ft from the transmitters! And this isnt even our tallest structure!
Now, imaging an 'offcut' of the 4 or 6inch stuff, about say 60ft long, with the appropriate adaptor/connector fittings, including a right angle, made nice and straight, with a few of the support brackets modified as guy rings.... (and yep, you can get adaptors direct down from the 6inch to an N type!!! I know, ive got some!) It really is rigid enough that you could make a self feeding mast!
It would be a great comeback to those people who point out that all the loss in your G5RV is from the coax! I wonder how a G5RV fed with 9" coax would perform?