If you can use a fixed height self supporting tower you might consider the
AN Wireless. They have some very high wind load ratings. 90 feet at 36.6
sq ft at 70 MPH.
Larry K5XG
http://www.hamservices.com
> Thanks - good points - what tower would be suitable for a beam of this
size
> or should I just go with the 4 ele steppir and do something else for 40m
> such as a sloping dipole array or a 4 square>
> We can get some pretty severe microbursts here
>
> Mark N1UK G3ZZM
>
>
>
>
> >I think you are a bit overloaded with that tower. The tower is rated
> > for 16 sq ft at 70 mph and the MonstIR has a load of 23.9 sq ft. I'm
> > not sure how the rating goes up as you lower the tower, but I would
> > expect a significant increase. I have tried to get that information,
> > but US Tower doesn't rate them like that and won't give out any info.
> >
> > Another item of concern, and this is the reason I chickened out putting
> > a MonstIR on a crankup which was rated to handle the windload. Because
> > of the size, those antennas can put a lot of torque on a tower. If you
> > look at the HDX series of crankups the only thing resisting that torque
> > is 3 little ears. If those bend, the tower is jammed. I was unable to
> > get any torque rating information out of US Tower.
> >
> > Jerry, K4SAV
> >
> > Mark Robinson wrote:
> >
> >>I am starting the planning phase of my tower. I am thinking of
installing
> >>a Texas Towers HDX-589MDPL crank up tower. I would like to put a MonstIR
> >>beam on it. I am concerned with the windloading - fully extended I don't
> >>think that I have enough safety margin - I believe that the Steppir has
a
> >>windload of around 30sq feet.
> >>
> >>Can I guy this tower at the top to get a better wind loading or should I
> >>leave it at say 50 of 60 feet most of the time? Does anyone know how the
> >>max windloading figure increases as the tower is nested?
> >>
> >>What would be the recommended rotor for a beam of this mass - I want the
> >>installation to hold up in our rough summer storms. I am located in
North
> >>Carolina
> >>
> >>
> >>thanks Mark N1UK G3ZZM
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