Re: [TowerTalk] Rotor replacement

["Jim White, K4OJ" <k4oj@tampabay.rr.com>]

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@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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>
>
> _______________________________________________
>
> 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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> 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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