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1. [TowerTalk] Thrust Bearing for 621/577 Military Masts (score: 1): Author: "Ed G" <ed.n3cw@gmail.com>; Date: Sat, 28 Feb 2015 07:49:38 -0500; Hello, Has anyone on the list ever tried to design or build an assembly that would clamp on the top of an AB-577 or AB-621 mast and provide for mounting of a thrust bearing, perhaps about a foot abov; /archives//html/Towertalk/2015-02/msg00521.html (7,022 bytes)
2. Re: [TowerTalk] Thrust Bearing for 621/577 Military Masts (score: 1): Author: "R. Michael Barts" <mbarts@vt.edu>; Date: Mon, 2 Mar 2015 11:50:25 -0500; I built a rotor "shelf" to mount on top of the AB-621. It is essentially a cage made from 1/4" Al sheet for top and bottom (12"x12", I believe) with 1" Al rod at each corner connecting the top and bo; /archives//html/Towertalk/2015-03/msg00028.html (8,383 bytes)

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