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21. Re: [TowerTalk] Holy SteppIR! (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 28 Dec 2005 08:57:35 -0800; How did you slew the array vertically? By tilting or by phasing the feeds? I assume the horizontal beamwidth is approximately similar? So, to a first order, this works out to about 20dBi gain? Assumi; /archives//html/Towertalk/2005-12/msg00564.html (9,760 bytes)
22. Re: [TowerTalk] Holy SteppIR! (score: 1): Author: "Clay Curtiss W7CE" <w7ce@curtiss.net>; Date: Wed, 28 Dec 2005 10:38:26 -0800; Jim, I'm tilting the entire array in my simulation. I forgot to mention in my earlier email I'm simulating the array on 20M. At 0 degrees elevation or tilt (E) the vertical beamwidth (VB) is 5.4 degr; /archives//html/Towertalk/2005-12/msg00568.html (11,893 bytes)
23. Re: [TowerTalk] Holy SteppIR! (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 28 Dec 2005 10:56:18 -0800; That's interesting.. The beamwidth doesn't change much, but you get a 2.5 dB gain in forward gain. In free space, you'd normally see gain*beamwidth be a constant, so a doubling of gain (3dB) results; /archives//html/Towertalk/2005-12/msg00570.html (10,622 bytes)

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