Barry
When I had to do this for a friend.
I used 3 of the Home Depot type squeeze bar clamps.
The kind a carpenter would use to clamp boards together.
The bar is approx 12" and I put the far end around the mast, and back end
around the tower tube.
One for each tube.
Then I removed the rotor.
the mast stayed perfectly centered in the tower as I put the replacement
rotor in.
Just remember to put the clamps on BEFORE removing rotor. lol
If I had to leave them there for a extended time, I would have used some tie
wire or tape around the clamp/tower tube to prevent them from falling.
----- Original Message -----
From: "Barry " <w2up@mindspring.com>
To: <Towertalk@contesting.com>
Sent: Monday, December 01, 2003 12:24 PM
Subject: [TowerTalk] Rotor replacement
> Hi all,
> My Tailtwister has been acting up a bit (not bad for 13 years in
> service) and I want to replace it with a spare I have. It is mounted
> down about 8 ft from the top flat plate (with a TB-3 bearing) in a
> Rohn 45. The mast is about 20 ft long with a TH7 up 6 inches and a
> 40-2CD at the top, about 9 ft above the TH7.
>
> I want to make this as simple as possible, so have thought of the
> following procedure:
> If I simply remove the rotor from the plate, without doing anything
> with the antennas or mast, the mast will lean until it hits a horiz.
> strut on the a wall, which is a max. of 7.25 inches from center.
> With 8 ft of mast below the TB-3, this amounts to a 4.3 degree
> deflection (if my math is correct).
>
> Questions:
> 1. Is there enough play in the TB-3 where this 4.3 degree out-of-
> vertical is not a problem with respect to the bearing?
> 2. Assuming the lean is OK, is there enough clearance between the
> mast and diagonal struts to slip the rotor out (and the new one in)
> between them without removing anything else, such as the rotor plate?
>
> Any other thoughts or ideas to make this as simple as possible for a
> one-man job, without jacking up the mast, etc?
>
> Tnx,
> Barry W2UP--
> Barry Kutner, W2UP Internet: w2up@mindspring.com
> Newtown, PA Frankford Radio Club
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
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> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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