John: The extra ten foot section of 45 will be MUCH stronger than any
mast you can put up there......I don't have the Dave Leeson book handy
as I write this, but memory tells me the 45 section will be like 3 times
stronger than a mast, assuming you don't go higher than Rohn specifies
for a free standing tower ie about 30 feet above the top guy. I have a
rotating tower just as you describe. I did put a mast in the top 2
sections (belt and suspenders approach) by buying 2 rotor plates and
using Rohn 2" mast clamps from an HBX tower on the bearings and locked
the mast so it will not turn. (same hole pattern as a TB3). My common
boom 2 el 30 2 el 40 sits 17 feet above the top guy ring, with a BIG
yagi just above the top guy ring. 73 bob de w9ge
John W wrote:
> which one is the safer/better installation: adding a mast that protrudes 10'
> above the top of the tower (and for some distance down into the tower), or
> adding another 10' section and sidemounting the new antenna at the top of it?
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