[TowerTalk] Rohn HDBX-48 Rotator Plate Remove & Install

Dave - W3NP w3np at atlanticbb.net
Thu Sep 17 11:29:34 EDT 2020


I have just removed my KT-34A (too far gone to repair), 6' mast, Ham IV 
rotator and the section #3 rotator plate from my HDBX-48. I removed the 
rotator plate in order to check out the integrity of the 3 mounting tabs 
and to make make a place for the pigtail and connector of the new 
TailTwister rotator to pass through as well as drilling 2 more mounting 
holes for the new rotator.

My question is this: I had a hard time getting the plate out of the 
tower (was hitting the cross braces) and had to use some hammer 
persuasion.  Was I missing something in the removal? I was expecting to 
just remove the 3 bolts and wiggle it out. Of course I am up on the 
tower while doing this and at 73 my endurance to stand on those cross 
braces is not what is used to be.  Is there a simpler way to get the 
plate back in place?  I will be installing a new modified plate and 
don't want to hammer on it.

I am replacing the KLM KT-34A with a Optibeam 10-3.  3.5 sq ft more wind 
load and a 19' boom vs the 16 on the KLM as well as longer elements. I 
have a Rohn TB-3 bearing on the top plate and all rivets looked 
good....no sign of torque stress.  I live in a relatively protected area 
and seldom see any wind in excess of 45-50 mph and that is a rarity. The 
tower and beam have been up since 1997 and both were used then. The 
tower dates from the early 80's when purchased new by a friend.

Any help on reinstalling the rotor plate without beating it up would be 
much appreciated.

73, Dave - W3NP



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