I would never run one piece of coax underground that far and then up the
tower, especially with a crank-up. The tower piece will likely get damaged
at some point. LMR600 is not that flexible and certainly would not be good
for your rotator loop. I would direct bury large Heliax underground and
then use something flexible and tough (like Belden 8267) on the crank-up
tower.
John KK9A
To: "<towertalk@contesting.com>" <towertalk@contesting.com>
Subject: [TowerTalk] LMR600 up to the top of tower ?
From: Robert Harmon <k6uj@pacbell.net>
Date: Fri, 31 Jul 2015 17:43:18 -0700
I have a 380 foot coax run to the top section of my motorized tower when it
is
fully extended.
I am changing out all my old RG213 and thinking of saving a few db by going
to
LMR600 up to the top section then
LMR400UF up from there for the rotor loop and up to the 40 meter beam and
triband/warc beam on the mast.
What do you think of LMR600 for this run from the shack up to the top
section
for a motorized tower ?
When I lower the tower I am thinking I could coil the LMR600 into maybe 5
foot
diameter coils on the ground.
BTW the tower is 90 feet to the top of the top section when all the way up.
Is this a bad idea ? (I am hoping to avoid the cost of the flex LMR600UF if
I
can.)
A side issue is I understand I have to be very careful not to nick the
copper
clad on the center conductor
when installing a connector on the non flex LMR600. I would use the Davis
PL259 connectors for LMR600. Anyway maybe this usage of the
LMR600 is not a good idea, what do you think ?
Bob
K6UJ
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