Thursday, March 12, 2009

Rotator plate mods for Yaesu 800SDX rotator

The below pictures show how the rotator and thrust bearing were added to the tower. The slotted holes didnt line up correctly to the Yaesu 800 rotator so I had to enlarge the slots slightly and also enlarge the mounting holes for the small bolts at the ends. As shown in the below series of pictures. The Yaesu rotator and the Yaesu thrust bearing are two outstanding products that work really well on this 4 sided roof tower.

After I modified the holes in the two mounting plates, I attached the rotator and thrust bearing and detached the upper section of the tower. So that the top section of the tower could be placed vertically.. And then you can line up the rotator to be in perfect alignment with the thrust bearing and your 8ft mast. All done at ground level. Getting everything "level" and in pefect alignment before tightening down the bolts on the rotator and thrust bearing. Taking great care at this step will provide a lots of rewards later. As lowering the tower and antenna to repair a faulty alignment later would be real chore.













The slotted holes didnt line up correctly to the Yaesu 800 rotator bolt pattern. So I had to modify the plate as shown in the below pictures. It simply required increasing the size of the holes. The Yaseu rotator and the Yaesu Thrust bearing are two outstanding products. Highly recommended.




















2 comments:

  1. Hello - Thanks for the great page! I've noticed your last picture can't be "super-sized" like the others. I'm curious as to how far the holes were off as Glen Martin Engineering states their towers are designed to accept Yaesu rotors without further modification. I've noticed in my RT-936 rooftop tower that there is a little "play" when putting everything together. Perhaps that accounted for why the holes were off in your installation? Thanks again for a great page detailing your tower installation - looks like a very nice set-up. 73, Dan / ab0re

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  2. Thanks for the great info. Did you build the extension to increase the tower height or did you order it from GlenMartin?

    Thanks,

    Anthony
    NR9R

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