On 8/17/2013 3:41 PM, Jay Kesterson wrote:
Thanks for the input. FWIW I was trying to raise the top set of guys
to get a bit more clearance for a yagi that will be on a ring down the
tower. Also my mast is very tall and it seemed a good idea to guy at
the top to reduce the leverage of the mast on the top of the tower.
The good of guying to the top plate as I see it: My guys are
Phillystran with open spelter sockets. So I just have to take a cotter
key out of the pin in the end of the socket and I can instantly attach
the guys to the top plate. It will mostly be a Christmas tree of V/UHF
yagis. The bottom yagi (6m) will be 5 feet above the tower to keep
away from the big metal top plate of the 45AG4. So the guys won't
really won't be in the way very much. If I guyed lower I didn't plan
on running the coax through the holes as I have five coax cables and
the LMR-600-UF connectors, used at UHF, won't even fit through the
holes. There is another set of guys 24 feet down the tower so I can
remove the top set if necessary for antenna work.
You mention 600 UF. I've used a fair amount of it and found very poor
life with the stuff. Poor resistance to UV and easily abraded if it
rubs against something like the tower top in a rotator loop.
I had 5 runs through a rotator loop that laid on top of a 45G top
plate. After 6 years (give or take a tad) the shield was showing
through several of the runs.
I figured I'd make jumpers for the station with the one piece that
looked good.
I'd made several jumpers when I cut a third to length, It looked like a
gray powder around the cut, so I stripped the jacket back a ways. The
foil was almost completely gone, but I could find no holes in the
jacket. It had to have worn down to the point of being porous because
this was a piece from the middle of a run and the ends were good so the
water didn't come in from the connectors.
73 and good luck,
Roger (K8RI)
The bad: I didn't even think about the coax routing. With five feet to
play with above the tower maybe I can come up with something and still
manage to keep the coax loops away from the bottom antenna. But it
will be messy with five cables. It would have been an "OH S***" moment
if I tried to run my cables as usual with the guys attached to the
plate if not for the input here so thanks.
73, Jay K0GU
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