The problem with a rope jamming in a pulley is that the rope (or cord)
is "too small" for the pulley. The situation you describe can happen
quite easily if you are using "parachute cord" for example with most
most big box off the rack pulleys.
I use the pulley approach with counter weights ( old window sash
weights) on the rope going through the pulley to keep constant tension
of the rope when the wind moves the tree back and forth. Typically these
last a minimum of 2 to 3 years. typically 3/8" or larger rope and an
appropriate sized pulley to match the rope
Dave
NR1DX
On 9/25/2021 4:23 PM, W3HKK@roadrunner.com wrote:
. Here in Ohio we are still having moderate QRN especially in the
evenings. When I get on at our SR, the VK/ZL boys are often coming
through fairly well with much less QRN.
My INV-L has a ceramic insulator at the apex, which is held in place
by 3/16" black synthetic rope of some kind ( Home Depot source) thrown
over my 52 ft tall black walnut tree tied off to another tree. I dont
use pullies since so often the rope slips off the roller and into the
crack between the roller and the U-bracket. So I just tied a rope to
the other side of the insulator and hoist.
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