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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