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Total 26 documents matching your query.

21. Re: [TowerTalk] HFTA (score: 1): Author: "David Thompson" <thompson@mindspring.com>; Date: Wed, 21 Apr 2010 21:55:13 -0400; David, Years ago the N4RJ contest station ( 7 or 8 towers) had a 4 stack of Cushcraft 4 el 10 meter beams. We had some help from W2PV and K6STI with the stack arrangement. We found that the best plac; /archives//html/Towertalk/2010-04/msg00647.html (7,983 bytes)
22. Re: [TowerTalk] HFTA (score: 1): Author: Cqtestk4xs@aol.com; Date: Wed, 21 Apr 2010 23:23:23 EDT; Testing with HFTA at different heights and stack separation, we found that the best heights are 18/21/24 meters, in order to cover with the best gain and angles the wave angle of arrival stats. Obvio; /archives//html/Towertalk/2010-04/msg00654.html (8,306 bytes)
23. Re: [TowerTalk] HFTA (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 21 Apr 2010 21:14:16 -0700; Yes. The fundamental answer is that HFTA models only one thing -- how an antenna at a given height interacts with terrain. It can do that for several antennas at different heights, but as I understan; /archives//html/Towertalk/2010-04/msg00657.html (8,591 bytes)
24. [TowerTalk] HFTA (score: 1): Author: "Barry Merrill" <barry@mxg.com>; Date: Sun, 25 Apr 2010 03:55:08 -0500; Since you brought it up, what is HFTa'S optimum slope angle and distance for maximum gain? I assume it's different for each HF band? Barry, W5GN _______________________________________________ ______; /archives//html/Towertalk/2010-04/msg00766.html (8,100 bytes)
25. Re: [TowerTalk] HFTA (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 25 Apr 2010 06:31:28 -0700; Study the discussion of HFTA in the ARRL Antenna Book. 73, Jim K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@co; /archives//html/Towertalk/2010-04/msg00769.html (8,459 bytes)
26. Re: [TowerTalk] HFTA (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 25 Apr 2010 12:06:18 -0400; Yes, by all means, look at the descriptions in the Antenna Book and on the ARRL web site. I'm not sure if it is mentioned there, but there's one added consideration. I think I'm correct to describe H; /archives//html/Towertalk/2010-04/msg00778.html (10,103 bytes)

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