I have seen this too. Steve's analysis is the same one I came too. You have to
somehow eliminate or at least dampen the vibration.
Tod, K0TO
Sent from my iPad air
> On Nov 8, 2014, at 7:46 AM, Steve London <n2icarrl@gmail.com> wrote:
>
> N7EF wrote:
>
> The one direction pot failure we ever had, at autopsy, revealed the
> rotator had been back and forth so many times
> that the brush riding on the resistance wire torus had completely worn
> away. What was left of it had sprung down
> so it was touching intermittently on inside diameter of the
> resistance wire torus...it was not a corrosion.issue.
>
> -----------------------------------------------------------
>
> I have never had this happen to one of my rotators, however I have seen it
> happen repeatedly to a local ham - and he was rarely turning his rotator. The
> issue was an incredible amount of wind-induced vibration on his TH7DXX-topped
> HDBX48 free-standing tower. Even on calm days, you could feel it. I finally
> convinced him to stretch a piece of black dacron rope between the top of his
> tower and a tree to dampen the vibration.
>
> 73,
> Steve, N2IC
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|