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Total 9 documents matching your query.

1. Topband: modeling question (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 26 Mar 2001 08:28:22 -0500; I am revisiting the modeling of my entire station in NEC-2, in particular on 80 and (planned) 160. The tower that I plan to shunt feed has 3 yagis on it, each of which has insulated elements. In orde; /archives//html/Topband/2001-03/msg00137.html (8,122 bytes)
2. Topband: modeling question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 26 Mar 2001 09:56:34 -0500; Hi Pete, You are probably asking for problems if you have a yagi anywhere near the top of the tower with insulated elements. The insulation will be subjected to very high voltages under all types of; /archives//html/Topband/2001-03/msg00139.html (8,096 bytes)
3. Topband: modeling question (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Mon, 26 Mar 2001 23:30:28 +0200; Tom's warning is expecially important for parasitic elements. The voltages between the boom and an insulated yagi element can be elevate or the currents involved when grounding it to the boom can be; /archives//html/Topband/2001-03/msg00143.html (7,863 bytes)
4. Topband: modeling question (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Tue, 27 Mar 2001 00:02:44 +0000; Mario and Tom raise interesting points. When I changed out the old TH6 for a nice shiny C31XR I worried about the insulated elements. I asked Force 12 about it. I was told there has been only one rep; /archives//html/Topband/2001-03/msg00144.html (8,149 bytes)
5. Topband: modeling question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 26 Mar 2001 22:01:00 -0500; You'll see in my example at the end the statement above is a wild guess without any meaning. You were very lucky it worked Larry. Voltage goes up only by the square root of the power increase. If yo; /archives//html/Topband/2001-03/msg00145.html (9,483 bytes)
6. Topband: modeling question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 27 Mar 2001 07:21:12 -0500; My point is the voltage varies all over the place with the electrical characteristics of the structure. Power can NOT be used to quantify the problem. (100 watts might be excessive power in some cas; /archives//html/Topband/2001-03/msg00148.html (8,560 bytes)
7. Topband: modeling question (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Tue, 27 Mar 2001 23:08:39 +0200; W7IUV: Hi Larry, in this case I was not pointing out about the coax placement because of safety reasons. The cables, running from the base of a shunt fed tower to a yagi antenna, or to a rotator, are; /archives//html/Topband/2001-03/msg00149.html (8,178 bytes)
8. Topband: modeling question (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 29 Mar 2001 10:27:01 +0200; Hi Ricky, in the specific case, a choke balun used with a yagi hasn't enough inductive reactance to isolate the dipole from the line and its presence is almost ininfluent. The coax is infact at a clo; /archives//html/Topband/2001-03/msg00152.html (8,281 bytes)
9. Topband: modeling question (score: 1): Author: 4x4nj@iname.com (R. Kline); Date: Thu, 29 Mar 2001 22:17:37 +0100; OK Mauri, thanks. I think there is a misunderstanding about terminology. I was referring to a choke balun made by using ferrite or powdered iron cores slipped over the outside of the coax. I have one; /archives//html/Topband/2001-03/msg00160.html (7,847 bytes)

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