Good trigonometry - really enjoy it.
Cheers,
James
ki5dq
--------------------------------------------
On Fri, 2/12/16, Ed Sawyer <sawyered@earthlink.net> wrote:
Subject: Re: [TowerTalk] My first tower section is not plumb...
To: towertalk@contesting.com
Date: Friday, February 12, 2016, 5:20 AM
"His tower is only out 1.5 inches at 20 feet which would be 3.0 inches at 40
feet his final height. I think he should put guy lines on
it, go to 40 feet,
make sure the tower is straight (even at an 3" angle) then put an antenna on
top, go inside and work a contest."
Ron W8RJL
I agree with Ron. Define straight. I looked into this back when my first
tower went up here and I saw that the tower was out of plumb
about 3 inches at its 70ft total height. (my second one here is about 1 - 1.5
inch at 70 ft). I found in research that perfectly plumb was neither easily
achievable nor necessary for a guyed tower. It seemed that a few inches (maybe
up to 5 inch for a 100 foot tower) was considered "acceptable". So I decided
to just tension the 2 guys pulling in the favorable direction to compensate the
slight lean heavier than the 3rd one. With a couple of beers - it sure looks
straight to me..
That tower is rock solid with a 4 el 20M monobander stacked over a 15M
monobander (36 and 45 ft booms). Up for 10 years now
and the more I look at it the straighter it gets.
73 Ed N1UR
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