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Hopefully someone can give me some direction on this problem.....
I've got a US Tower MA770 (70' tubular tower with a rotating base), =
installed in the fall of last year. A Force 12 C4SXL yagi ( 8 el on a =
22 foot boom) is the only antenna on it. The tower spends most of its =
time at the 50 foot height. As my lot is small, the tower is about 15 =
feet from my bedroom window. =20
In any kind of wind, the antenna will twist the top sections of the =
tower. The assymetrical design of the yagi leads to a lot of twisting. =
Unfortunately, when the sections twist in each other the tower makes =
irritating noises, not unlike a groaning or grating sound. Its starting =
to get to me and the XYL is suggesting that it might be nice to get rid =
of the whole thing. I've made sure that the antenna mounting bracket is =
at the centre of balance of the boom, but this did not correct the =
problem. It does not matter how high the tower is raised, it still =
makes this noise in winds. =20
Bruce at US Tower says that this is an unusual problem and is not sure =
of a fix, other than possibly trying some kind of lubricant?
=20
Any suggestions or ideas would be appreciated.
=20
Thanks
Rick, VE3MM
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<DIV><FONT size=3D2></FONT><FONT color=3D#000000 size=3D2>Hopefully =
someone can give=20
me some direction on this problem.....</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I've got a US Tower MA770 (70' =
tubular tower=20
with a rotating base), installed in the fall of last year. A Force =
12=20
C4SXL yagi ( 8 el on a 22 foot boom) is the only antenna on it. =
The tower=20
spends most of its time at the 50 foot height. As my lot is small, =
the=20
tower is about 15 feet from my bedroom window. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>In any kind of wind, the antenna will twist the top =
sections=20
of the tower. The assymetrical design of the yagi leads to a lot =
of=20
twisting. Unfortunately, when the sections twist in each other the =
tower=20
makes irritating noises, not unlike a groaning or grating sound. =
Its=20
starting to get to me and the XYL is suggesting that it might be nice to =
get rid=20
of the whole thing.</FONT><FONT size=3D2> I've made sure that the =
antenna=20
mounting bracket is at the centre of balance of the boom, but this did =
not=20
correct the problem. It does not matter how high the tower =
is=20
raised, it still makes this noise in winds. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Bruce at US Tower says that this is an unusual =
problem and is=20
not sure of a fix, other than possibly trying some kind of=20
lubricant?</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Any suggestions or ideas would be =
appreciated.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Thanks</FONT></DIV>
<DIV><FONT size=3D2>Rick, VE3MM</FONT></DIV></DIV></BODY></HTML>
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