[TowerTalk] US Tower bearings ?

[Richard (Rick) Karlquist]

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, etc..as 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