I did just that on a 5 el 40m yagi that I built a couple of years ago. The
boom is 60 feet of square aluminum tower and I wanted to not only reduce the
torque effects but to have some way of making sure everything stayed
level - the boom seemed to want to end up slightly off level on one end.
I used 1/2 PEX tubing (used in floor radiant heat systems - extremely tough
tubing!) to prevent chafing at the cross over points.
73 Don
VE6JY
> Run a guy wire from the left end of the top crossbar to the right end of
the
> mast mounted crossbar, then another line from this point to the left end
of the
> bottom crossbar. Repeat the process for the other side, i.e. from the
right end
> of the top crossbar to the left end of the mast mounted crossbar, and then
> another line to the right end of the bottom crossbar. In this
configuration,
> you've used four wires to support the boom laterally, vertically and to
prevent
> torque. Chafe where the wires cross could be handled by any of several
> methods. Does this make any sense? Any comments would be most
appreciated.
>
> Regards,
>
> Bob Gates, KG7KW
>
> ex K7INE and PJ9KW
>
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