Be safe man and use a crane. DO NOT try removing the guys...... Its not
worth it...
Jim
At 06:32 PM 4/11/99 -0400, Tom Wagner wrote:
>
>I just bought a Cushcraft X9, and have been thinking about
>how to raise it. Tramming is out, I just don't have enough room.
>I had resigned myself to building it on the tower -- a prospect
>that took another X9 owner 6 hours. Ugh! The X9 has a
>28' boom, 9 elements and the longest element is 36'
>
>I was browsing KC1XX's web site and found an idea that
>intrigues me. He raised W4AN's new 40m beam by walking
>it up the tower and detaching/reattaching guys as he went.
>
>Has anyone done this? Here is how I would envision it:
>Element tips pointing up, walk the beam
>(with gin pole assistance of course) to
>the first guy level. Attach a temporary guy wire just below the
>boom and tighten a come-along until the first torque bracket bolt
>comes out easily. Move the antenna past the first guy level, and
>reattach the old guy. Remove the temporary guy and move to
>the second guy level. Repeat the procedure at each guy level.
>
>Questions:
>
>1. Is an ordinary come-along safe for this purpose? If it gives way,
>the tower will be subject to unbalanced forces and could collapse.
>Should the guys be loosened at each level, before using this
>approach? Would two temporary guys be better than one?
>
>2. My tower is 75' of Rohn 25 guyed at 3 levels with 1/4" EHS,
>somewhat over-guyed, but well within spec for downward stress.
>
>3. Does this seem safer than spending 6 hours on the tower?
>It sure is less work.
>
>Has anyone used this approach. I'd like to do this safely, but
>without 6 back-breaking hours at the top of the tower. Even
>if it took longer than 6 hours to do it right, it would be better
>than building it at the top. It would also be better, in that
>I could test it at the first guy level for proper operation and
>correct problems much more easily than using the other
>approach.
>
>Please post replies to the reflector.
>
>Tom Wagner, N1MM
>
>
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>
>
>
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