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Re: [TowerTalk] US Tower bearings ?

To: "Tower and HF antenna construction topics." <>
Subject: Re: [TowerTalk] US Tower bearings ?
From: "Richard (Rick) Karlquist" <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Tue, 27 Apr 2010 08:25:06 -0700
List-post: <">>
Jim Thomson wrote:
> I just took possession of a used US Tower Corp HDX-689 yesterday.  What's the 
> deal on the
> The K7NV 2" mast clamp  [ minus the 5 x bolts]  is a snug fit for 2" OD AL 
> tube I stuffed into 
> it for my test.   No play at all !!     Just barely tighten those 5 x bolts.. 
> and the mast is not gonna
> slip any time soon.  It's a mech marvel, and very well made.  
> OK,  with NO set screws on either thrust bearing... the ENTIRE weight of mast 
> + yagi's, is,
> will  be sitting on the prop pitch. 

I have an HDX-5106 and K7NV PP.  I believe K7NV told me it is necessary 
to have weight on the PP to get a good seal to keep water out.  I have
about 300 pounds on mine.  It hasn't been a problem.

Rick N6RK

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