Hi Gregg
I having had to re position crush craft 40meter beam on towers over the years.
With that experience in mind when I installed my XM240 two years ago, I used
sets of HI Gain cast mast clamps. This configuration not only maintains the
boom in it's correct position, it makes
it possible to Tilt the boom for access to either element ,just in case!
Wayne. W3EA
Sent from my iPad
On Jul 22, 2012, at 10:00 PM, "Gregg Seidl" <k9kl@centurytel.net> wrote:
> I just got down from my tower after turning my XM-240 in line to match the
> rotor and other antenna AGAIN.
> I have done this several times now and I just can't get a grip on why this
> continues to happen. I haven't had trouble with any other of my antennas,some
> have more windload than the XM-240.
> As I was up there enjoying the view and thinking why this one turns I had an
> idea and wanted to ask others ideas.
> First it is up 85 feet and has been up for 6 years and I think it works
> great. It is much more stout than the 40-2CD that I had up before but came
> down piece by piece in a bad windstorm.
> I am using the stock clamp which seems to be great,the only thing that I
> haven't used one other antennas but did on this one was a galvanized mast
> from Texas Towers. Could it be that the mast is too "smooth" to grip? The
> U-bolts are not loose when I go up to straighten the antenna. It only happens
> once a year or so nd always after a 70-80 MPH windstorm which we get here
> sometimes.
> Looking for ideas.
> Gregg K9KL
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