In a message dated 97-08-04 04:25:03 EDT, kimo@lava.net (Kimo C. Chun)
writes:
> In professional situations they might use cable supports that are
> woven webbed wire netting with a loop on top for attachment. It is like
> the Chinese finger trap toy. When stretched lengthwise it closes around
> the cable(s) and holds it tightly. The steel loop is then attached to
> the support point. They come in different size ranges according to the
> cable size being gripped. These are also sometimes used to haul cables
> through conduits. But, if the cable weight/tension is removed from the
> device it will expand and may let go of the cable. They are available
> from commercial electrical supply houses.
This is how you do it. The most common devices are called Kellum grips
and they are perfect for this type of application. That way, the weight is on
the grip and no damage is done to the cables. The rotator control cable
should be handled this way as well as feedlines.
Any commercial feedline installation has a grip that's used for hoisting
as well as taking the weight of the cable when it's installed. BTW, 1-5/8
inch Heliax (very common) weighs one pound per foot. The Andrew spec calls
for one hoisting grip every 100 feet.
73, Steve K7LXC
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