[TowerTalk] Rotor replacement

[Jim White, K4OJ]

What a great idea - score another reason why I am still subscribed to 
tower talk!

Might be worth considering using this type of clamp to hold mast against 
blocks of wood equal to the distance between the leg and pipe - make 
them a tad shy and bring up some shim shingles...

Tnx W9OL

Barry - suspect your rotor problems exist because the Tailtwister and 
Ham M Rotors anticipate a 2 1/16" (not 2") mast... :-)


73,

Jim, K4OJ







FireBrick wrote:

> 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 at mindspring.com>
> To: <Towertalk at 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 at 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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>>
>>
> 
> 
> _______________________________________________
> 
> 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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