New to TowerTalk.....name is Mike, W7PIM and I would very much
appreciate any and all constructive input into my feasibility research.
I have read over much of the archives regarding the things I want to
accomplish and now I need all of you tower/antenna guys out there to rip
into this challenge. Overall objective: Modify my current HDX-555 (555), to
hold and rotate
2 or 3 large yagis. (ie: 2 el. on 40, 2 X 6 el on 20, homebrew
antennas) I have not listed any loading or weight numbers here yet
because I am dealing in concepts at the moment. Those details will come
in the detailed math analysis and design to follow. Objective #1:
Design and construct a bottom section that would raise the tower an
additional 20 ft. Plan would be to use the current winch and lift cable
to raise the current 555 to it's normal height and then use a separate
winch and lift cable to then lift the entire 555 the additional 20 feet
inside the new tower section. Objective #2: Design and
construct a tower rotating system that will mount on top of a very heavy
duty pedestal tower or large post section about 3 ft. tall and then
secure the entire assembly from objective #1 to the top of the 3 ft.
section. This brings me to Objective #3: Design and construct
guy rings for the 555 that are custom fitted for each section and would
allow the entire tower to be rotated. Now, before I stir up all the
naysayers out there, let me tell you why I want to do this. Getting to
old to climb tall towers, and want to homebrew antennas. Need to move
them on and off and up and down tower. This would give me the best of
all worlds for what I need. Resources: Very supportive wife, 10
acres of land, son with MS ME, another son with MS EE, a son-in-law
with ME, 2 brother-in-laws that are certified ASME+++++ welders and a
machinist in the family. Have access to extensive Finite Element
Analysis support, a can do attitude and lots of experience at doing
things that most people won't tackle. Have also reviewed K7NV's
outstanding paper on "Guyed Tower Behavior". I will share my findings
and progress with anyone that is interested. Send replies to
seabassm01@hotmail.com Mike W7PIM. Thank you very much for your
input.
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