Tom, our ham club in Dallas had a guest from Russia some 10 years or so ago
who showed pictures of a tower which was installed section by section from
the bottom. The bottom section looked like a regular tower section but one
side was open. Each new section was inserted there and bolted on, then
raised up. I think it was military surplus.
I have been using a TX472 for years with a 2 section aluminum ladder
leaning against the bottom section. The ladder overlaps itself quite a bit
for stability and going up it is almost like climbing stairs. The top has a
U shaped attachment which straddles the top of the tower bottom section. The
first time I climb it I tie the ladder top to the top of the 1st section for
safety. The bottom of the ladder is about 4-5 feet away from the tower. The
beam on this tower is a F12 420/240 which has a tilt head. I put a longer
bolt in the top spot on the boom mast plate (2 pieces) which allows it to be
tilted. I tuned the 2L 40 by standing on the ladder and adjusting the
shorting wires on the elements with the beam tilted. It was tuned for min
rear signal from a 500ft away signal generator.
It works great for me. 73, Dan, N5AR
[mailto:firstname.lastname@example.org]On Behalf Of tom heifner
Sent: Saturday, January 01, 2005 9:32 AM
Cc: Tom Heifner
Subject: [TowerTalk] Rohn base
I'm soon to have my 60th birthday and my tower climbing days are over. I
have a tilt-over Rohn 45 but am thinking about eliminating this hinge system
and buying some more sections and going straight up about 80-90 feet. I
have also considered chunking the whole thing and buying a crack-up tower,
but that will still leave me about 30 feet of climbing even when lowered.
Surely someone has thought up the idea of having some type of permanent
A-frame at the ground level, so the tower can be assembled and disassembled
from the bottom. That is, place a 10-foot section in the vertical position.
Hoist it vertically with a pulley and winch until the bottom is 10-feet off
the ground and bolt another section to its bottom. Just keep going to the
full height. Sort of like an oil well in the opposite direction. This
would limit my climbing height to about 10-15 feet.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
TowerTalk mailing list
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list