The T2X brake wedge is a lousy scheme. It allows the antenna to
move/oscillate a total of 7 degrees in the wind which will pit most thrust
bearings unless you park it in a different location every so often.
Pointing accuracy is +/- 7 degrees 3 sigma. My current antenna is frozen
since the rotator can't overcome the pits in the Rohn TB3 thrust bearing
which means I didn't use the rotator enough. Hurricane Ike fractured my
brake wedge although it continued to hold the antenna. I only keep my T2X
because it continues to work after 30 years which must be taken as a great
positive even if I hate the brake wedge!! Someday I will have to replace
the thrust bearings in the tower whereas the design requirement was that
only the rotator would have to be replaced over the tower's lifetime. Like
NASA, the only problems I have are the ones I didn't think about. Ken K5RG
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|