Gene, I agree that a second shelf would contain the mast while the rotator
is removed, although I am not sure that the mast would flip out of the
tower. I just don't see any benefit to having a second bearing on this
shelf, as KM1H claims. Since you are bolting angle iron to keep the mast
from turning when the rotator is removed, you could also use this to hold
the mast in place and not really need the second shelf.
73,
John KK9A
----- Original Message -----
From: "Gene Smar" <ersmar@verizon.net>
To: <john@kk9a.com>; <TOWERTALK@contesting.com>
Cc: <ron@k4wz.com>
Sent: Saturday, August 25, 2007 11:41 PM
Subject: Re: [TowerTalk] Fw: Rohn 45 Question
John:
What some on TT have suggested is installing two angle irons from the
mast out to and beyond the tower legs. Use a muffler clamp to hold each
angle onto the mast and arrange them so each rests tightly against a leg.
In that way a heavy wind can't rotate the mast and antennas.
The second bearing shelf is nothing more than a support to keep the
mast from flopping over out of the tower once it's disconnected from the
rotator.
73 de
Gene Smar AD3F
----- Original Message -----
From: <john@kk9a.com>
To: <TOWERTALK@contesting.com>
Cc: <ron@k4wz.com>
Sent: Saturday, August 25, 2007 9:32 PM
Subject: [TowerTalk] Fw: Rohn 45 Question
> How do you keep the antennas from turning in the wind and damaging your
> coax?
>
> John KK9A
>
>
>
> To: <towertalk@contesting.com>
> Subject: [TowerTalk] Fw: Rohn 45 Question
> From: "Ron Todd"
> Date: Sat, 25 Aug 2007 16:29:01 -0400
> List-post: <mailto:towertalk@contesting.com>
>
> So why does a rotator want to have that second thrust bearing?
>
> I wanted two because when you take the rotor out and with only one thrust
> bearing you don't have control of the mast horizontally. With two TB you
> always have control.
>
> _______________________________________________
>
>
>
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