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Larry. I'm putting up a nice used C3XLD, which has a K-factor of 1790 ft-lb and a sq ft of only 9.1. Supposedly, the G1000 will take 1663 ft-lb (but is also shown as 2020 ft-lb at http://www.texastowers.com/kfactor.htm - which one is correct, I'm not sure yet). The 1000 is rated at 23.7 sq ft, and although my C3XLD is only 9.1 sq ft, it exceeds the K-factor by 130 ft-lb. To carry this to the ridiculous, I suppose you could have a 4x6' sheet of aluminum on the mast and that would be ok, since the turning radius at 2' x weight at 20# would be a K-factor load of 40 ft lb. Makes you wonder which engineer has been smoking the wrong stuff in his pipe. It seems silly to have a 9.1 sq ft antenna on a 23.7 sq ft rotor that exceeds the rotor's specs, especially since 33' is not that big a boom these days. Maybe Yaesu's engineers were thinking of a stack of 4 or 5 TA-33's when they dreamed up the 23 sq ft rating. :-) I see your C31XR is a 1951 ft-lb K-factor, which when you add the other two beams will be too much for the 1000 in any case. Sadly, the next notch up in rotors at Yaesu is the 2800, which is rated a gross overkill 6,870 ft lb K-factor and costs $1100 vs. about $500 for the 1000. Clearly what the world needs is a rotor rated for about a 3,000 ft-lb K-factor, at about $750 or so. I'm going with the 1000 (mainly because I happen to have a new one in hand), and will rethink my position if I ever decide to add another antenna to the mix, or if the C3XLD wrecks the rotor, which I don't think will happen. I have sworn off Hy-Gain for several reasons, so don't much care what they offer at this point. 73, Jerry W5KP ----- Original Message ----- From: "Larry Stowell" <lclarks@nc.rr.com> To: <Force12Talk@qth.com> Sent: Sunday, May 27, 2001 10:16 PM Subject: [Force 12 Talk] C-31XR > What size(model) of rotor is every one using for this antenna? > > I just ordered one and want to get a rotor. I'll have this at the top of the > tower with a small 6mtr and small 2mtr above it. If I use Yaesu's "K" factor > the G1000 is two small for just the C31XR. Any thoughts?? > > 73's > Larry WA2SRY -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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