How about three RG8 size cables? Would that cause any coiling/uncoiling
problems?
John
wa5zup> From: K7LXC@aol.com> Date: Mon, 23 Jul 2007 15:50:32 -0400> To:
towertalk@contesting.com; k3bz@arrl.net> Subject: Re: [TowerTalk] Feedline Coil
or Loop??> > > In a message dated 7/23/2007 12:13:41 P.M. Pacific Daylight
Time, > towertalk-request@contesting.com writes:> > > I've always used a
feedline "loop" that hangs out and down from the tower > leg that's half-way on
the rotation circle, is attached to the boom a few > feet out from the mast,
and is long enough that it doesn't impede antenna > rotation in either
direction. I recently saw an installation with the > antenna mounted about 2
feet up the mast from the tower top, with the > feedline coiled about 2 turns
loosely around the mast rather than hanging > down. The antenna end of the coax
was attached at the bottom of the > mast-to-boom plate. The arrangement looked
like those coils of cable that > the TV trucks deploy when they raise their
microwave towers, but only a > couple of turns to the coil. When rotated
in one direction the coil got > tighter to the mast, but not touching it. In
the other direction the coil > got looser.> > > My question is.... is this a
good idea? I have never seen it before, so > maybe it isn't in widespread use,
which makes me wonder why not.... as it > "appears" that it would put less
stress on the coax than the usual U-shaped > arrangement.> > You betcha. It's
an alternate method that works FB and is a little more > foolproof than a
conventional rotation loop. I think the reasons that it's > not used more is a)
many people don't know about it and b) it takes a little > more thought and
planning to do. If you've hauled up the feedline with your > beam, getting it
around the mast a couple of times might not be easy. OTOH you > can spin the
beam on the mast a couple of times to do it. > > I've used it many times. It's
easier with one or two cables - more > starts to cause coiling/uncoiling
problems. > > Cheers,> Steve K7LXC> TOWER TECH > > > > > > > > **
************************************ Get a sneak peek of the all-new AOL at >
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