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Total 9 documents matching your query.

1. Re: [TowerTalk] stacking logs (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Sun, 24 Jan 2010 14:42:12 -0500; OK, I vowed not to add further to this thread. I lied. Curiosity has the better of me. Where the logs are stacked horizontally, they would seem not to be ideally spaced for vertical angle pattern, ov; /archives//html/Towertalk/2010-01/msg00670.html (7,936 bytes)
2. Re: [TowerTalk] stacking logs (score: 1): Author: "Gene Smar" <ersmar@verizon.net>; Date: Sun, 24 Jan 2010 14:53:15 -0500; Jim: Some earlier postings on this thread talked about slanted LPs in a stack. What they meant is the two LPs would be pointed up (the bottom one) and down (the top one) so that the front, shorter el; /archives//html/Towertalk/2010-01/msg00672.html (9,051 bytes)
3. Re: [TowerTalk] stacking logs (score: 1): Author: "Steve, W3AHL" <w3ahl@att.net>; Date: Sun, 24 Jan 2010 15:05:19 -0500; There are two reasons to stack yagis or LPDA's: 1. To increase gain by using a phased array. Maintaining a specific wavelength spacing is important. 2. Taking advantage of the different take off angl; /archives//html/Towertalk/2010-01/msg00674.html (10,024 bytes)
4. Re: [TowerTalk] stacking logs (score: 1): Author: " Jack KZ4USA" <videorov@verizon.net>; Date: Sun, 24 Jan 2010 15:20:14 -0500; Any one have a good large LPDA model that would work in NEC- WIN Plus+ ? Jack KZ4USA Bradenton, Florida _______________________________________________ _______________________________________________; /archives//html/Towertalk/2010-01/msg00676.html (11,304 bytes)
5. Re: [TowerTalk] stacking logs (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Sun, 24 Jan 2010 15:31:43 -0500; Sorry for extending this, but another thought came up. (Doug...aren't you glad you got this one started??) (Gene... the tilted log post was mine, at first... ) So here's the thought, with respect to; /archives//html/Towertalk/2010-01/msg00677.html (8,654 bytes)
6. Re: [TowerTalk] stacking logs (score: 1): Author: Scott McClements <kc2pih@gmail.com>; Date: Sun, 24 Jan 2010 15:52:20 -0500; Yes, this was posted a couple weeks ago. Excellent article, excellent antenna, model file is on this site as well: http://www.realhamradio.com/Log_Periodic.htm -Scott, WU2X __________________________; /archives//html/Towertalk/2010-01/msg00678.html (12,672 bytes)
7. Re: [TowerTalk] stacking logs (score: 1): Author: "Steve W3AHL" <w3ahl@att.net>; Date: Sun, 24 Jan 2010 16:26:34 -0500; Jim, The concept of sloping the booms of two vertically stacked LPDA's is to maintain proper phasing between the wave fronts from the two antennas as the frequency changes and the active region moves; /archives//html/Towertalk/2010-01/msg00682.html (10,171 bytes)
8. Re: [TowerTalk] stacking logs (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sun, 24 Jan 2010 13:33:43 -0800; I'm working a model on that now. And I agree with you. The vertical pattern is so wide (90 deg 3dB beamwidth, for instance) that the tilt doesn't seem to be a big deal. The height above ground, thoug; /archives//html/Towertalk/2010-01/msg00684.html (10,134 bytes)
9. Re: [TowerTalk] stacking logs (score: 1): Author: "Gary \"Joe\" Mayfield" <gary_mayfield@hotmail.com>; Date: Sun, 24 Jan 2010 16:07:42 -0600; The spacing would be a compromise stacking tri-banders or stepirs as well. 73, Joe kk0sd Jim: Some earlier postings on this thread talked about slanted LPs in a stack. What they meant is the two LPs; /archives//html/Towertalk/2010-01/msg00688.html (11,213 bytes)

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