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#1
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On Mon, 2 Jul 2007 19:52:24 -0500, "J. Mc Laughlin"
wrote: Dear Rick: Sorry to have received the call-sign incorrectly. Your Father's call does not ring any bells. The main reason for two sections above a house bracket is because of the significantly greater probability of greater wind pressure on the two sections compared to three sections that start at ground level. You also expect to have more effective area for the greater wind pressure to work on. I have become convinced that the reason few urban TV/FM antennas and Rohn 20 (no cross braces) towers fail is because of a dramatic reduction in wind pressure up to about 35 feet above ground in a typical urban environment. The real limitation (for you) may turn out to be due to the building code used in your area. When the time comes to have a serious antenna tower for HF, do find a professional engineer licensed in your State who's advice about how to satisfy the building code and 222G will be worth every penny you pay to him or her. Warm regards, Mac N8TT P.S. My neighbor K8DO still does things that give me the willies. Even when I was young, I sure would not climb 50 feet of un-guyed Rohn 25. Medical school instills rather more "confidence" than engineering schools do. Shucks, I met him way before he became so conservative. |
#2
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Dear Neighbor Roger:
Oh my, and I clean forgot that the two of us fly little airplanes into and out-of strange places. Perhaps it is just antenna people in this part of Michigan. No. I am convinced that for DO it is the residue of surviving in a factory and medical school. Warm regards, Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: "Roger (K8RI)" wrote in message ... On Mon, 2 Jul 2007 19:52:24 -0500, snip P.S. My neighbor K8DO still does things that give me the willies. Even when I was young, I sure would not climb 50 feet of un-guyed Rohn 25. Medical school instills rather more "confidence" than engineering schools do. Shucks, I met him way before he became so conservative. |
#3
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![]() On Tue, 03 Jul 2007 15:28:08 -0500, J. Mc Laughlin wrote: Oh my, and I clean forgot that the two of us fly little airplanes into and out-of strange places. Oh, man, and to think I've been LISTENING to you daredevils... :-) Rick Bonanza N122X (KASH) |
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