RE: Re: [Elecraft] Elecraft Antennas in trees
> To: Elecraft@mailman.qth.net
> Cc: [EMAIL PROTECTED]
> Date: Monday, July 28, 2008, 1:41 PM
> My G5RV is up in the oak trees here and is attached using
> springs at each
> end. They are about 12 inches long and 1 inch in diameter.
>
ECTED]
- Original Message -
From: "Ralph Tyrrell" <[EMAIL PROTECTED]>
To:
Sent: Monday, July 28, 2008 1:37 PM
Subject: RE: Re: [Elecraft] Elecraft Antennas in trees
The ARRL Antenna Book suggests using a pulley and counter weight to allow
for the varying distances between trees
My G5RV is up in the oak trees here and is attached using springs at each
end. They are about 12 inches long and 1 inch in diameter. Been up for a
couple of years with no problems.
Brian
N1WNC
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The ARRL Antenna Book suggests using a pulley and counter weight to allow for
the varying distances between trees caused by wind. At my former QTH, Ellijay
GA, I noticed that in very gusty conditions sometimes the support trees moved
in opposite directions at the same time. I decided to make my
I've gotten my fair share of storms here too and rather than go the
route of counter weights since I had to kinda skirt the side of a big
cedar I opted for a rope method.
I ended up tying two ropes together at the center point of the dipole.
Then ran the rope up into the trees. The rope bears all
On Sun, 27 Jul 2008 11:47:54 -0700, Ron D'Eau Claire wrote:
>The counterweights need to be heavy enough to hold the antenna, but not
>heavier than needed for that. When trees whip in the winds, the inertia
>of the counterweights can produce shock loads many, many times greater
>than the weights th
Dan's comment is very true of *any* antenna, and most especially tree
mounted antennas.
To survive storms at all, it's very important that the antenna wire or
the halyards *never* fall under strain from the tree as it moves in the
wind. Even small trees can exert tons of pressure on the wire or
ntenna launching in the winter when foilage is less, but
the things come down whenever they please. With a loop over each "good"
branch, I can pull up new rope/wire even in the middle of summer.
Dan / WG4S / K2 #2456
Subject: RE: R
What you need are a set of climbing poles, which needs the poles, 3 ropes and
a weight. The climbing poles are very two long rods with a hook on the end
of each able to slide along each other (but not tilt !). The poles extend
via two ropes, one per pole attached to the base of that pole and to ne
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