Here is the setup I used.
Had a 60' tower with the TH7DX right at the apex of the "pointy piece"
with an 1/4"
wall thickness aluminum mast up from it holding a variety of other
To "stiffen" the setup, I ran a liner of 16ga powder coated 1.5" "TV
was about 1.75, it hammered right in) at the bottom.
I welded an automotive clutch "throw out bearing" to the top of the tube
out of the "pointy part" (you will need to grind off the galvanized
coating and do the
welding outside as the fumes will do you no good.) The dead weight of
was supported by the throw-out bearing and as it was "pinned" to the
weight of the other antennae were also supported by the bearing. Made
with the rotator M U C H easier!! To lube the mast, I drilled a hole in
the side of the
tube at the "pointy end" and tapped it (pipe tap) and installed a "ZERK"
(also known as a grease fitting.) Plan carefully so you have this
fitting where it
is easy to get to! I sealed the bottom of the mast with a wheel bearing
seal so the
grease would not drip. Sorry, do not have the part numbers but I did get
at NAPA. Worked fine. I lubed the mast-tube with "Lubriplate"
as it is supposedly water-resistant. I suspect you would want to use
lube. I lived in Ohio at that time and never had any trouble turning the
in the bitter cold of winter.
You may have to try several auto parts stores to find one willing to
spend the time
for you to try out various bearing seals and throw out bearings.
The throw - out bearing and the area where the weld was made and
area was painted with aluminum Rustoleum and it held up fine for the 9
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
List Sponsor: Are you thinking about installing a tower this summer? Call us
for information on our fabulous Trylon Titan self-supporting towers - up to
96-feet for less than $2000! at 888-833-3104 <A
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Administrative requests: towertalk-REQUEST@contesting.com