[TowerTalk] Tailtwister Pot disengaged?

[Dave Hachadorian]

On Thu, 02 Nov 2000 20:42:05 -0500 Bud Hippisley <k2kir@telenet.net>
writes:
> At 10:52 AM 2000-11-02 -0700, you wrote:
> 
> >After giving this some thought, I surmised that perhaps the
> >little ears on the feedback pot had somehow gotten disengaged
> >from the slot on the upper housing. I then rotated the antenna all
> >the way into the clockwise stop, and now the indicator works
> >fb! Is it plausible that I jammed the ears back into the slot?
> >Anybody ever hear of this happening?
> 
> Yes, I've done it to Ham-M and T2X on number of occasions.  It 
> appears to be the result of inadequate use of thrust bearings to 
> eliminate side torque on the upper housing -- as when trying to 
> rotate a 4-element KLM 40.  The standard Rohn shorty rotor top 
> section is too short for any decent sized beams.
> 
> Bud, K2KIR
> 

Sounds like a good explanation to me, Bud. My rotor is just below
a single thrust bearing in the Rohn 25 flat top section, with a KT-34XA
andCushcraft 40-2CD above it. We had a big windstorm last week. It could
have happened while the wind was blowing and the beams were rocking
back and forth. Thanks for the explanation! Now I'll wait and see if
it happens again. Next time I redo all that stuff up there, I'll put
the rotator further down, even if I have to cut a diagonal.

Dave Hachadorian, K6LL
Yuma, AZ
K6LL@juno.com

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