For the same guy tension, a 50% radius will put a greater downward force on
the tower (equivalent to a heavier antenna if you neglect wind loading) and
it will provide less lateral force along the length of the tower to keep it
from deflecting in the wind. The 80% radius makes for longer guys, though,
so any effect of stretching in the guys would be a bit greater, I suppose.
I'm not saying 50% isn't sufficient in any specific case, but I think
geometry favors the 80% radius overall.
At 07:11 AM 11/18/99 EST, K7LXC@aol.com wrote:
> 50% anchor radius or 80% anchor radius - they're just different
>scenarios. You could have 30% or 120% too or anything inbetween. I don't
>the engineering reason for the difference but as you pointed out, the 50%
>distance is for another application and not typical antenna installation
>we're used to seeing.
>Cheers, Steve K7LXC
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