[TowerTalk] guy levels ?

[jeremy-ca]

All of Rohns spacings are non interger for that reason but I doubt equal 
spacing would have much effect on a short tower.

My 180' 45G is guyed at 40/80/120/160 primarily since it is at the section 
junctions and also where I wanted to put the mounts for the big 40' boom 20M 
yagis. My guys are also broken up with insulators and the final footage at 
each level is different. Ive never noticed any vibrations at any wind speed 
at into the mid 90's.

It shouldnt be hard, if necessary, to add vibration damping almost at ground 
level.

Carl
KM1H



----- Original Message ----- 
From: <Cqtestk4xs at aol.com>
To: <TOWERTALK at contesting.com>
Sent: Tuesday, August 21, 2007 10:12 PM
Subject: Re: [TowerTalk] guy levels ?


>
> In a message dated 8/21/07 10:08:41 P.M. Eastern Daylight Time,
> 4cx250b at muohio.edu writes:
>
> I was  under the impression that one shouldn't guy a tower at regular
> spacings,  because the wind can excite standing vibrational modes in the
> tower that  can lead to failure. In such modes, the vibrational standing 
> wave
> nodes  would be at the guy anchor points. I thought non-integer spacing of
> guy  wires was recommended to eliminate this possibility. Am I wrong 
> about
> this?
>
>
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> The engineers at Rohn who designed the spacings for the towers apparently
> have no problems with this.  They are all pretty evenly spaced.
>
> Bill K4XS/KH7XS
>
>
>
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