Hi all,
The big project for the summer here is to remount three monobanders on the side
of my R25 tower. Right now they are clamped to a singe leg, and they do slip,
causing some surface damage to the tower legs. Not good. I haven't decided how
to do it right yet. Two of the antennas will be located just above guy points
on the tower. I feel comfortable that a well-secured mounting method using two
tower legs at those points will be a great solution. Any twisting forces on the
tower will be transferred directly to the guy wires. But, the third yagi will
be mounted between the other two - not near a guy attachment point. Twisting
forces will travel through the tower to the guy points above and below. I was
thinking that a sort of "safety relief" could be implemented by using a
boom-to-mast attachment that would SLIP before the tower gets damaged. I'd
rather have to go up the tower and realign the antenna than replace the tower
after a catastrophic failure. This can be accomplished by a better mounting
directly to a single leg with a clamp, or by using two pieces of angle stock
mounted across two tower legs supporting a short mast offset from the tower by
12-18 inches. Any thoughts on this kind of approach?
73,
Jim Idelson K1IR
email k1ir@designet.com
web http://www.designet.com/k1ir
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