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Total 9 documents matching your query.

1. [Towertalk] Models and real world (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 10 Jul 2002 08:40:46 -0400; I'd like to add something we almost always forget. Models are no substitute for real world results. The REASON we have models is the actual system is too complex to consider. While the models are ce; /archives//html/Towertalk/2002-07/msg00266.html (9,682 bytes)
2. [Towertalk] Models and real world (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 10 Jul 2002 09:03:17 -0400; This is certainly true, but there is another good reason, and that is that the sheer magnitude of the task required to accurately measure a phenomenon is impractical. I remember that back in the 60's; /archives//html/Towertalk/2002-07/msg00268.html (9,316 bytes)
3. [Towertalk] Models and real world (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 10 Jul 2002 09:12:27 -0400; Oops, I meant to say +/- 1 dB, for consistency with Tom's example. 73, Pete N4ZR Check out the World HF Contest Station Database at www.pvrc.org; /archives//html/Towertalk/2002-07/msg00269.html (8,061 bytes)
4. [Towertalk] Models and real world (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 10 Jul 2002 10:24:10 -0400; longhand as long as we stay away from limits where they fall apart. We have to know the limits of models, just like we have to know the limits of measurements. None are perfect, and many are not even; /archives//html/Towertalk/2002-07/msg00270.html (7,831 bytes)
5. [Towertalk] Models and real world (score: 1): Author: clewis@knology.net (Chuck Lewis); Date: Wed, 10 Jul 2002 12:31:04 -0500; One of my favorite zingers: "If You Can't Be Accurate, Be Precise!" (not true in your case, of course <grin>) Chuck, N4NM ("Rigor Gained is Clarity Lost"....I'll take credit for that one) http://www.; /archives//html/Towertalk/2002-07/msg00275.html (8,507 bytes)
6. [Towertalk] Models and real world (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Wed, 10 Jul 2002 23:20:19 -0700; Here is some more food for thought w.r.t. modeling of ground by NEC. I got interested in NVIS by the recent article in QST. I put up five 40 meter antennas to check this out: a ground mounted vertica; /archives//html/Towertalk/2002-07/msg00281.html (9,801 bytes)
7. [Towertalk] Models and real world (score: 1): Author: n2rd@arrl.net (Rajiv Dewan, N2RD); Date: Thu, 11 Jul 2002 08:39:00 -0400; A simple explanation might be that the takeoff angle at which you empirically measured was not close to 90 degrees. The difference in gain between perfect ground and medium ground, predicted by Eznec; /archives//html/Towertalk/2002-07/msg00283.html (11,970 bytes)
8. [Towertalk] Models and real world (score: 1): Author: K3BU@aol.com (K3BU@aol.com); Date: Thu, 11 Jul 2002 09:02:13 EDT; Hi Rick, very interesting and thanks for bunch of experiments. What is the "ground screen"? Bunch of radials or screen/mesh like wires? Yuri; /archives//html/Towertalk/2002-07/msg00285.html (7,062 bytes)
9. [Towertalk] Models and real world (score: 1): Author: richard@karlquist.com (Richard Karlquist); Date: Thu, 11 Jul 2002 07:49:59 -0700; There are parallel 16 AWG tinned wires running north-south every 3 feet. There are similar wires running east-west. The wires are laying on the ground. The crossovers are silver soldered with Stay-Br; /archives//html/Towertalk/2002-07/msg00288.html (8,862 bytes)

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