If the pad is square (or round), then there could be a geometrical illusion
since the center of the triangle will not correspond to the center of the
square. For example, suppose the tower is 18" per side and the base is 36"
square; With two of the tower legs parallel to one side of the base, the center
of
the tower will be close to 5.2" from the a line passing by the two legs and
the third leg will be twice this number or about 10.4" from the center of the
triangle.
To make the center of the triangle superimpose on the center of the base,
the tower must be shifted about 2.6" away from the side of the base adjacent
to the parallel legs. Conversely, the third leg will then be 2.6" closer to
its' adjacent base side.
In this case, the two legs would be 18" - 5.2" or 12.8" from the side of the
base and the third leg would be 18"-10.4" or 7.6" from that side of the base.
This makes more sense if you draw it out on a piece of gridded paper.
Will a 2.6" offset cause a problem? I am not qualified to answer that;
hopefully someone else will.
73/k5gw
In a message dated 7/9/2005 10:38:25 A.M. Central Standard Time,
k1ttt@arrl.net writes:
Well, if its got 3 legs it's a perfect triangle, unless they are in a single
line. However, if those 3 legs are not part of a perfect 'equilateral'
triangle I would say something is wrong with the tower. Check it carefully
for damage and proper construction.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of isp@bnjcomp.com
> Sent: Saturday, July 09, 2005 14:48
> To: towertalk
> Subject: [TowerTalk] Center on Pad of Rohn SSV
>
> I just purchased some more rohn SSV sections. The gentleman selling it
> had a 10N through 1W tower on a concrete pad. I noticed that the tower
> was not cnetered on the pad and inquired. He says that the tower is not
> perfectly trianglar and that the placement of the tower is so that the
> center of tower is a location that if you placed a bobin or something
> from top center that would mark the center of gravity for the tower. That
> according to him makes the legs not center on the pad but off to one side.
> I have been reading here on this list for 3 years now and have never seen
> anything addressed concerning that. Does anyone have any information on
> this "theory"?
>
> thanks terry
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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