[TowerTalk] Above the Thrust Bearing

[n7au@televar.com (N7AU)]

   I also feel it is the wind that wares a grove in the aluminum mast. I
have been using a aluminum mast for years and found out a grove was cut
in the mast where it comes out the top of the pointy tube so I cut a tin
soup can open and warped it around the mast slid it down inside the tube
and held it in place with a hose clamp. No grove now in my aluminum
mast. It seem to be good for about 4 or 5 years.

Bob
N7AU

Peter Sundberg wrote:
> 
> >From my experience it is not the rotation of the tube that does the
> grinding, it is the constant movement caused by the wind that does it. Even
> a small gap between the two tubes will make it possible for the wind to
> move things a little and after a few years the wear on the aluminium tube
> is clearly visible.
>