Thats strange. Numerous YCCC and other serious contesters/DXers with big
stacked arrays have been using dual bearings for decades with a significant
reduction in rotator failures.
Setting up a dual bearing installation is quite simple if you pay attention
to what you are doing, even when using a Tailtwister. Other rotators are
much easier. My current setup on 3 towers uses Orion, Create and Tailtwister
rotators. Binding just doesnt happen.
Carl
KM1H
----- Original Message -----
From: <K7LXC@aol.com>
To: <towertalk@contesting.com>; <john@kk9a.com>
Sent: Saturday, August 25, 2007 12:09 PM
Subject: Re: [TowerTalk] Rohn 45 Question
>
> In a message dated 8/25/2007 9:02:02 A.M. Pacific Daylight Time,
> towertalk-request@contesting.com writes:
>
>> Personally I see no reason for a second bearing and I see a huge
>> headache
> trying to line up a top bearing, middle bearing and a rotator on
> something
> built as unprecise as the Rohn mounting plates. Your rotator already has
> thrust bearings and it should easily accommodate the side forces at the
> bottom of the mast if it's properly sized.
>
> I totally agree. The reason for an intermediate plate/bearing is to
> hold
> the mast in case of a rotor swap. That's it. The accessory shelf already
> has
> a hole in the middle that'll do just that so the additional TB is
> unnecessarily redundant and a waste of money.
>
> Tower parts are not precision items. You take a chance on additional
> bind when trying to line up the rotator and 2 TBs. It's sometimes
> challenging
> enough just to get the bind out with one TB.
>
> Cheers,
> Steve K7LXC
> TOWER TECH
>
>
>
>
>
>
>
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