WE0H wrote:

Hi John,
Take a large rope and put it up in the tree over a limb and bring it back
down to the ground level. Tie the two ends of the large rope together so you
can pull the rope up with one side and pull it back down with the other
side. Attach a pulley to this rope. Run your antenna support rope through
the pulley and pull the pulley up with the big rope. Now pull your antenna
up with the rope that goes through the pulley and tie a heavy weight to the
antenna support rope. Now all the tree movement will just move the rope
through the pulley and not cut the antenna support rope.

To support my HF long-wire, I have been using a similar arrangement here but, in
addition, I have connected a spring "in series" with the pulley, to absorb small
shocks. This arrangement has served me well for the last 3 years.
73
André