[TowerTalk] 2nd thrust bearing inside tower - you opinions??

[john at kk9a.com]

Tower top plates and rotator plates are not manufactured very precisely and 
trying to line up two bearings plus your rotator bearing could be difficult. 
If it's not lined up exactly it will cause some binding and add more stress 
to your rotator and I don't see any benefit to having a lower bearing if you 
are using an adequate rotator.   I think just using a top bearing and a 
heavy duty rotator about 6' below would be a better choice.   I'm not sure 
what a good rotator would be for this system, perhaps a Yaesu G-2800DXA or 
an even larger Prosistel.

73,
John KK9A (P40A in the ARRL DX Phone Contest March 3 & 4)




To: <towertalk at contesting.com>
Subject: [TowerTalk] 2nd thrust bearing inside tower - you opinions??
From: "K5XA John" <k5xa at godfather-ridge.com>
Reply-to: k5xa at godfather-ridge.com
Date: Wed, 21 Feb 2007 08:37:59 -0600
List-post: <mailto:towertalk at contesting.com>

Howdy,

Need a little advice.

Planning about 130 feet of Rohn 45 - 20 to 22 feet of mast - Force 12 Magnum
240N over a Force 12 C31-XR at the top - side mounting another C31-XR.

Considering a 2nd thrust bearing inside the tower.

Any suggestions/ideas/experiences you might share?

Tnx!

73 ............... K5XA

John Guida
k5xa at godfather-ridge.com