I agree with Larry and many of the others. I have a 24' mast and use
two. I have used two for about 15 years now. I sleep better using two and
the rotor maintenance is now a breeze (and non existent!). With one bearing
at the top, we had to use a come along to get the mast back into the
vertical to mate up with the rotor collar. Not fun....
Mike
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Larry
Sent: Wednesday, August 12, 2009 10:04 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] One thrust bearing vs. two
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
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|