[TowerTalk] Lifting a mast off the rotator
Ron Freeman
ron at k5mm.com
Sun Apr 24 23:14:06 EDT 2016
I use a cheap scissor jack positioned on the top plate. I either jack against the mast plate on the lowest antenna or a step bolted to the mast.
Sent from my iPad
> On Apr 24, 2016, at 9:11 PM, Les Kalmus <w2lk at bk-lk.com> wrote:
>
> I came home from Visalia to find my antenna system freewheeling. The mast holds 4 yagis, one of which is very large, and is rotated by an Orion rotator.
> If my suspicions are correct, the problem is the little 1/4" bolt holding the shaft up into the bottom of the mast clamp has loosened and allowed the shaft to fall.
>
> The tower is lowered and the antennas are tied off to a tree. I have removed the mast clamp and now I have to raise the mast about 1/2" to free the centering block so I can remove it to inspect that bolt.
> I have a come along with an additional block with which I can lift the mast, but the carabiner I have won't fit into the small space between the centering block and the inside of the mast.
>
> Any suggestions on a way to either hook the mast from the bottom or to clamp to it so I can raise it? We're talking maybe 400 lbs in the complete antenna system.
> I have done this in the past but I think I didn't have the centering block at that time so it was easier to get something hooked into the bottom of the shaft.
>
> Les W2LK
>
>
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