[TowerTalk] Mast slipping

Frank frankkamp at att.net
Sun Jul 22 20:19:17 PDT 2012


Gregg Seidl 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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I used to have problems with mast slippage too.  It was aggrevating to 
have to crank the tower down and re-calibrate.  So I pinned the mast to 
the rotator housing.  The next time we had a strong wind I lost the 
rotator.  That slipping mast was a blessing in disguise.




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