In a message dated 5/11/2008 6:53:54 P.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> My techniques works OK on a relatively light antenna like the 40-2CD,
but I
found the heavier SteppIRs have a tendency to rotate in the straps i.e., the
boom rotates) When that's happened, I've had to secure the straps with hose
clamps, but I think this is a bad idea because hose clamps have sharp edges.
I'd like to find a better way to secure the straps to the boom.
Well, the main problem is that the SteppIRs have the elements above the
boom which makes them top-heavy and want to turtle or pitch-pole upsidedown.
The KLM/M2 has the same problem being top-heavy. Just about all other
antennas have the elements below the boom or thru the boom.
Using hoseclamps is okay. Just check your slings after using them. I doubt
any damage will happen.
The only way to get around this is to use a tiller of some sort. It
attaches to the boom and the other end slides up the tramline. There are
discussions in the archives at _www.contesting.com_ (http://www.contesting.com)
.
> Soon I'll be tramming the heaviest antenna I've attempted: a Cal-AV
2D-40A,
at 17 sq ft wind load and 165 lbs. Needless to say, I'll wait for a calm
day. But with such a large antenna. I want to make sure the sling technique
is as sound as possible.
The weight shouldn't be a big problem. It's the top-heavy thing that
you're fighting. BTW you might want to double-block your haul line for an
antenna this heavy. That'll cut the haul weight in half.
Cheers,
Steve K7LXC
TOWER TECH
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