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@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@contesting.com" <TowerTalk@contesting.com>
Subject: [TowerTalk] T2X Multiple failures, fix?
From: DAVE WRIGHT via TowerTalk <towertalk@contesting.com>
Reply-to: DAVE WRIGHT <kanives@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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
--
73
Roger (K8RI)
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|