In a message dated 98-08-24 12:39:04 EDT, darrell.earnshaw@sap-ag.de writes:
<< [1] I am assuming that re-using the Phyllistran should not cause me any
concerns, or should it? I've no idea what the lifetime of this stuff is.
Currently, there are no nicks or cuts in the sheathing, although it has
been in use on previous towers for about 10 years. Thoughts?
Phillystran has been around for about 23 years so we know that it lasts
at least that long. Since then they have introduced a new jacket material. I
don't know if the new jacket has some advantages or whether it was introduced
to lower costs.
>>[2] I am thinking of using a continuous (unbroken) length of 3/16th EHS
for the lowers set of guys. Because that guy point is at about 35 ft or
so, I'm assuming it's low enough not to cause any interaction with the
antenna(s), and thus there is no need to electrically break it up.
The ARRL antenna book has a chart listing segment lengths vs.
frequencies for possible interaction. Personally I'm not too concerned with
the bottom set(s) since they're out of the horizontal antenna plane.
>> [3] A recent exchange of mail on this reflector addressed the issue of
"safety" guys, or 6-way guying. Although I have a tree company scheduled
in the next few weeks to remove trees and limbs that are either in the
way or overhang the anticipated guy anchors and guy paths, I am still
concerned of other trees nearby being a potential risk. In the past
there has been no husbandry or the trees on my lot or the adjacent lots,
and thus there are a lot of large, old trees. (It's quite disconcerting
to lie in bed and hear the crash as giant limbs fall somewhere "in the
forest".) Would extra guys in addition to the main guys make sense, and
if so, what configuration should I consider? Extra guys just at one
level, or at all levels? >>
Top level only for 6-way guying is fine. There's no need for more lower
on the tower. W7XR had an alder land on his EHS double-guyed 40M tower. It
stretched the guys somewhat but no damage other than that. I don't know if
branches landing on the Phillystran will be a big problem or not.
Cheers, Steve K7LXC
Champion Radio Products
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