With the 4X4 post in
concrete, a ladder
can be leaned
against it to enable
one to push the
mast up with the hex
beam on it.
A thrust bearing probably is not
really necessary for the heavier
duty rotator that I wound up
buying but I already had it. It is
mounted to the post with angle
stock obtained from Lowe's or
Home Depot. It relieved me of
any worries anymore about the
Mast and Rotator
The hexagonal beam weighs 24 pounds and is symmetrical in shape resulting in best wind performance for the rotator.
My mast is a 30 foot Channel Master push up telescoping mast that cost about $75. I use Dacron rope guy lines.
I have used a Hy gain rotator offered by MFJ Enterprises for TV use costing about $80 and a similar unit sold by Radio Shack. I think these units would work OK if
the rotator was mounted at the top of the mast. But if mounted at the bottom as I have done in the past, the weight of the mast adds to the hex beam weight and two
such small rotators of mine failed eventually.
As a result, I recently installed a thrust bearing and a Yaesu G-450A rotator. The rotator is at the bottom and rotates the entire mast.
I sank a twelve foot 4X4 treated post in concrete to serve as a rigid support and mounted the push up mast to the post. With the post sunk in concrete, you can lean
a ladder against it to get up high enough to push the mast to its maximal position. You can climb the ladder with the hex beam and then mount the hexagonal
beam into place on the mast before extending the mast sections. Some neighborly help would be nice for this although I was able to do mine completely alone.
For ideas on how to couple your hexagonal beam to a push up mast, a tower mast or whatever, go here.
This is a Yaesu G-450A rotator.
It is mounted on the post with
angle stock from Lowe's or
Home Depot. It turns the mast
as well as the hex beam.
Here is the final product ready
The bottom flange fits the
typical one inch push up mast
perfectly and you should
tighten the set screws as shown.
However, it is a necessity to drill
a hole through the flange and
mast and then insert a 1/4 inch
hex bolt to secure it better.
A choke balun can be mounted
underneath the base plate with
cable ties. Such a choke can
be made of six Type 77 toroids
slipped over the coax and held
in place by cable ties.
Hexagonal Beam by K4KIO
Building the G3TXQ Broad Band Hexagonal Beam
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