[TowerTalk] Center on Pad of Rohn SSV

[TexasRF@aol.com]

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 at 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 at arrl.net
web:  http://www.k1ttt.net
AR-Cluster node: 145.69MHz or  telnet://dxc.k1ttt.net


> -----Original Message-----
>  From: towertalk-bounces at contesting.com [mailto:towertalk-
>  bounces at contesting.com] On Behalf Of isp at 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 at 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 at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk