[TowerTalk] Balanced Line using Coax ?

[RCARIELLO]

Hello to all,

In the ARRL antenna handbook they show where you can use two coax lines as a
balanced line. Only the center conductors of the Coax are used. The article
covers the new impedance of the lines but skips what the losses are. Also
what is the power rating of this type of line. It is mentioned the Coax
shielding provides easier installation and better noise rejection then true
Open Wire Line.

I am setting up a new station with a local radio club. The best location for
the tower is some distance from the station. We plan to put a large Tri-Band
antenna on the tower with a single feed system for 10-15-20 meters. The
total distance from the antenna feed point to radio input will be about 800
feet.

To keep transmission line losses and cost to a minimum the thought was to
use Open Wire Line. This is very doable at this location for most of the
transmission line run. At the tower and into the station building a Coax
line would need to be used.

Any help would be appreciated,
Rich AA2MF