It should be easy to add a rotator cage to the top of the AB-577 MAST so you
could use a thrust bearing. Below is one example:
https://www.prosistelshop.com/en/standard-rotator-cage-49.html
John KK9A
Pete Smith N4ZR wrote:
I have a C-3E tribander on an AB-577 "rocket launcher." I also have a
3-element 6-meter yagi that I was planning to mount 6 feet above the
Yaesu rotator at the top of the 577, but was deterred by concern of some
knowledgeable hams that this might overload the rotator and cause a
catastrophic failure, destroying the rotator and the tribander. That's
just too big a risk for me.
It occurs to me to wonder whether someone out there has contrived a way
to mount a thrust bearing above the rotator on an AB-577? I can
visualize what this might look like, involving a structure attached to
the top of the top-most tube below the rotator and supporting a thrust
bearing a foot or so above, but don't want to reinvent the wheel unless
necessary.
--
73, Pete N4ZR
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|