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

[Dave - W3NP]

Thanks for the reply Bill.
Getting the plate into the tower is not a problem. The problem is 
getting it to lay in it's proper place in a horizontal plane without 
jamming against the braces.  There is probably a trick to it....one that 
was not apparent to me up on the tower.

73, Dave - W3NP


On 9/17/2020 12:17 PM, w6rgs wrote:
> Can you use a sufficient length of rope tied to the plate and fished 
> up internally as you climb? Once you're in position, tie the free end 
> to a cross brace, in case you lose your grip on the rope.  Pull the 
> plate up through the center of the tower to its mounting location.
> 73. Bill  W6RGS
>
> -------- Original message --------
> From: Dave - W3NP <w3np at atlanticbb.net>
> Date: 9/17/20 08:32 (GMT-08:00)
> To: towertalk at contesting.com
> Subject: [TowerTalk] Rohn HDBX-48 Rotator Plate Remove & Install
>
> 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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