I use two because I have a 20 foot mast over the tower with 3 antennas and
it gives me
a better feeling that the mast won't twist out of vertical when I pull the
rotator to lower the mast
to get to the upper antennas (80M rotatable dipole and 2 el 40M yagi).
Operationally with
the rotator in place it really doesn't matter that I can see.
Larry, W6NWS
----- Original Message -----
From: "Tod -ID" <tod@k0to.us>
To: "'Tower Forum'" <towertalk@contesting.com>
Sent: Wednesday, August 12, 2009 12:20 AM
Subject: [TowerTalk] One thrust bearing vs. two
>I would be interested in 'opinions' on the need or utility for only one
>thrust
> bearing at the top of a tower vs. two thrust bearings one at the top and
> the
> other several feet below the first.
>
> Tod, K0TO
>
>
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