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Old October 10th 14, 07:34 AM posted to rec.radio.amateur.antenna
Lostgallifreyan Lostgallifreyan is offline
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First recorded activity by RadioBanter: Sep 2006
Posts: 613
Default A cheap wind-up and tilt-over tower?

rickman wrote in :

Or are you saying the antenna would bow of it's own weight? That is a
flimsy antenna.


Yes. It was flimsy, but so is a reed, and those evolved to live with the
wind. Watch the way grass moves. Those things don't even have guy ropes, my
antenna mast did, so if anything it got an 'unfair' advantage... Obviously
this method won't work for a heavy antenna, but something with little weight,
little displacement off its vertical axis, and little wind resistance
compared to its mast, will work. Just pick a material that is never bent
beyond its fatigue point. Like I said, FIFTEEN YEARS. Storm force winds too.
If I hadn't seen it and done it, I wouldn't be saying it.

I can add a small remembered detail about the point where I added the guy
lines. When I first placed the mast vertical, just to see it that way, I
noticed one major node that tended to stay still, roughly two-thirds up it. I
decided that if I guyed the mast not exactly at that point, but slightly
offset from it, it should damp resonaces in a similar way to the placement
used to damp a guitar string. That way I get the best placement, combined
with enough damping to prevent the oscillations building up to a critical
level. It worked. My neighbours became convinced at around year five, but I
managed to calm their anxieties beforehand.