[TowerTalk] T2X Multiple failures, fix?

[Roger (K8RI) on TT]

This almost has to be an alignment, or bearing problem unless you have a 
snagged rotator cable problem.  Even a snagged RG8 size cable is strong 
enough to hold a TailTwister.
I had a Ham IV under this 
http://www.rogerhalstead.com/ham_files/Tower29.htm which was badly 
overloaded and eventually failed when I tried to turn the array in some 
strong wind, BUT, "it did not bind!"  I eventually went to a double 
worm, gear rotator as I got tired of changing rotators. THEN I got tired 
of changing thrust bearings as changing those was an all day production. 
ALL the antennas had to come down and the mast removed before the 
bearing could be changed

73, Roger (K8RI)

On 2/18/2017 7:05 PM, john at kk9a.com wrote:
> The Mosley 57B is does not appear to be a large antenna so you should not
> have this much trouble. I am not sure what alignment issue you think you may
> have. If you are just using a thrust bearing and a rotator down inside the
> tower there is not much to align if the mast is indeed 2". I would just
> check to make sure that the top bearing is turning freely and that there are
> no wiring issues. If the antenna is rocking when you stop, it sounds like
> you are not letting it coast to a stop and perhaps that it damaging the
> brake. I would not keep replacing the rotator with an identical unit over
> and over. It does not make financial sense and it becomes very aggravating.
> There are many reliable rotators without a brake that automatically slowly
> ramp up to speed and then slow before stopping such as a Yaesu G-2800 DXA.
>
> GL
> John KK9A
>
> To:	"TowerTalk at contesting.com" <TowerTalk at contesting.com>
> Subject:	[TowerTalk] T2X Multiple failures, fix?
> From:	DAVE WRIGHT via TowerTalk <towertalk at contesting.com>
> Reply-to:	DAVE WRIGHT <kanives at yahoo.com>
> Date:	Sat, 18 Feb 2017 17:57:09 +0000 (UTC)
>
>   Greetings all,
> I've been having a continuous problemw/my tower setup since installed in
> 1993'.
> I just can't figure it out. I've mentioned this online in the past, &
> received
> much helpf/hams/clubs & groups (K6EAG/TT/& NCCC) both local & abroad,thank
> you!
> However the system is still having the same problem; itseems incurable. :(
> The system is: Tri-Ex LM-354 tower (54'HD crank-up, w/tilt-over base), that
> keeps eating rotors. The Yagi isa Mosley "Pro-57b," mounted on various mast
> lengths/strengths(both short & long), 2" OD/1/4" ID f/aluminum. Have also
> tried
> differingmaterials (both steel & thick-wall aluminum), w/a thrust
> bearing(used
> 3 in 23 years/both stainless-steel sealed bearings, &"open" bearings using
> marine grease (local salt-air/SF, CAbay-side.) I've been using T2X rotors
> mounted IN tower f/the start; & they eitherdon't last long, or quit
> immediately
> (last 2), "right after" arebuild.
> Originally purchased the 1strotor new, & have had the last 2
> rebuilt/exchanged
> several timesvia the two popular repair/rebuild shops here in the US. The
> onlypossible problem I can see from the ground is the Yagi "swings" abit
> back &
> forth after done turning/brake initialization. (looks like the swing is too
> much?)
> Other than that, nothing seen exceptwhen it starts to fail, it will not turn
> up
> on tower; even though itturns fine on the ground. That is, until it becomes
> "stuck" forgood/then I send it off f/a rebuild. The repairs typically
> mention"brake failure." I have since purchased the "brake-delay"PCB, & the
> next
> rotor will have it installed in box.
> At this point I'm -almost- positiveit's an "alignment" issue(?), but I'm not
>
> clear how proceed. Ihad assumed perhaps wrongly that once everything was
> bolted
> together,it's functional/should work. I have now been advised that
> assumptionmight be incorrect. If someone could point me to a link/site
> w/theironclad alignment procedure in writing/illustration/or video,
> thatwould
> be perfect.
> When functional, the system worksgreat! =304 worked/277 confirmed. Most
> w/this
> system, & a fewwires/dipoles/ smaller Yagi's prior to this large Yagi.
> Problem
> is,it's been down more than 60% since installation. Never had theseproblems
> w/a
> small tri-bander; this just sucks! :( I'veabout given up; & haven't been on
> much at all. (99% HF.)
> This record of failure is justintolerable, & now that my age is getting up
> there w/healthissues, I won't be able to work on it much. Need help as itis.
>
> Any suggestions/troubleshooting discussion? I would be reallyhappy to get on
>
> air & try f/the last few "rare ones," &do a few more of the popular contests
>
> before kicking da bucket. :)
> Thank you all,
> Dave K6JOX 73
>
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-- 

73

Roger (K8RI)


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