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21. Re: [TowerTalk] tower resonances (score: 1): Author: "Tom Osborne" <w7why@verizon.net>; Date: Fri, 13 Feb 2009 09:54:07 -0800; Hi John I have kind of an unusual idea for you to try. Why not forget all you have read and just put it up and try it out? It seems to me that some people put up antennas without ever modeling them a; /archives//html/Towertalk/2009-02/msg00305.html (9,487 bytes)
22. Re: [TowerTalk] tower resonances (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Fri, 13 Feb 2009 10:06:11 -0800; So we can say, matrix asymmetry is ALL due to measurement and arithmetic problems. Hmm.. And this leads to something I was fooling with a while ago. Because you know the physical system has a symmetr; /archives//html/Towertalk/2009-02/msg00306.html (10,196 bytes)
23. Re: [TowerTalk] tower resonances (score: 1): Author: Dan Zimmerman N3OX <n3ox@n3ox.net>; Date: Fri, 13 Feb 2009 13:40:28 -0500; So what? I've got 103 countries worked on 160m with 100W into an antenna whose optimistic gain is -6dBi. 25W ERP on 160m and I work all kinds of DX. I have a lot of fun. But some people don't have t; /archives//html/Towertalk/2009-02/msg00308.html (9,907 bytes)
24. Re: [TowerTalk] tower resonances (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Fri, 13 Feb 2009 10:58:32 -0800; If there is no unintentional mutual coupling to nearby structures and assuming that the array elements are identical, then you should get Z11 = Z22 = Z33 to within measurement error. If you've got a; /archives//html/Towertalk/2009-02/msg00309.html (11,341 bytes)
25. Re: [TowerTalk] tower resonances (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Fri, 13 Feb 2009 11:15:58 -0800; Hey, I've got a whole garage full of stuff that made me feel better when I bought it, even if I never even ran RF through it, but just thought I might sometime in the future. And it was money well sp; /archives//html/Towertalk/2009-02/msg00311.html (9,237 bytes)
26. Re: [TowerTalk] tower resonances (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Fri, 13 Feb 2009 11:16:28 -0800 (PST); Yes, true in theory. However, the ground losses of the elements also have to be identical. I have a huge ground screen in an open field with nothing nearby and I still don't get exactly identical val; /archives//html/Towertalk/2009-02/msg00312.html (10,171 bytes)
27. Re: [TowerTalk] tower resonances (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Fri, 13 Feb 2009 11:17:29 -0800; Good point. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinf; /archives//html/Towertalk/2009-02/msg00313.html (9,229 bytes)
28. Re: [TowerTalk] tower resonances (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Fri, 13 Feb 2009 12:41:52 -0800; Excellent! I've long worked in pro audio. When Time Delay Spectrometry (invented by Dick Heyser at JPL in the 70's, manufactured as an instrumentation product by Crown International in the early 80's; /archives//html/Towertalk/2009-02/msg00314.html (9,295 bytes)
29. Re: [TowerTalk] tower resonances (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Fri, 13 Feb 2009 12:46:22 -0800; Excellent reply, Dan. Couldn't have written a better one. 73, Jim Brown K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list Tow; /archives//html/Towertalk/2009-02/msg00315.html (8,113 bytes)
30. Re: [TowerTalk] tower resonances (score: 1): Author: "Tod -MN" <tod@k0to.us>; Date: Fri, 13 Feb 2009 16:52:54 -0600; I wonder what your total with the 100w and -6dbi antenna might be if you lived on the NW Coast of the US. It is better to be lucky [geographically] when operating 160m. Tod, K0TO ____________________; /archives//html/Towertalk/2009-02/msg00316.html (8,241 bytes)
31. Re: [TowerTalk] tower resonances (score: 1): Author: "N7mal" <n7mal@citlink.net>; Date: Fri, 13 Feb 2009 15:08:17 -0800; Here's a thought John.... Why not turn your computer off and quit reading krap from guys who never built a real antenna in their lives. Go put power to your tower and see what happens. Try a shunt fe; /archives//html/Towertalk/2009-02/msg00317.html (9,512 bytes)
32. Re: [TowerTalk] tower resonances (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Fri, 13 Feb 2009 17:06:30 -0800; I'd venture that all of us discussing making mutual z measurements and phased arrays actually have built more than 1 antenna. Here's a thought John.... Why not turn your computer off and quit reading; /archives//html/Towertalk/2009-02/msg00318.html (8,552 bytes)
33. Re: [TowerTalk] tower resonances (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Fri, 13 Feb 2009 17:23:54 -0800; Mal and John, I'm not sure who you're talking about having "never built a real antenna in their lives" but it damn sure doesn't apply to guys like Rudy Severns, or Jim Lux, or to K7LXC, or to me. If; /archives//html/Towertalk/2009-02/msg00319.html (9,857 bytes)
34. Re: [TowerTalk] tower resonances (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Sat, 14 Feb 2009 08:17:43 -0800; Jim, Maybe a "real antenna" is one that doesn't work :-) :-) 73, Mike W4EF............ _______________________________________________ _______________________________________________ TowerTalk mailin; /archives//html/Towertalk/2009-02/msg00323.html (9,041 bytes)
35. Re: [TowerTalk] tower resonances (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sat, 14 Feb 2009 08:33:32 -0800; gosh, I've certainly built my share of those... _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://; /archives//html/Towertalk/2009-02/msg00324.html (9,008 bytes)

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