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@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
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|