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Total 27 documents matching your query.

21. Topband: cone of silence (score: 1): Author: "D Andersen" <w7dddd@msn.com>; Date: Thu, 12 May 2005 11:02:05 -0700; Hello, On my 300 foot Beverage that is 1 inch high the length was about 300' even. I presume that the low height caused some velocity factor reaction. The null was very obvious when compared to the n; /archives//html/Topband/2005-05/msg00023.html (6,884 bytes)
22. Topband: Cone of silence (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 12 May 2005 14:27:17 -0400; Just one quick comment. I can't think of an easy accurate way to measure radiation from a vertical antenna end. If the antenna is terminated in a center tapped "T", the T wire used as a "non-radiatin; /archives//html/Topband/2005-05/msg00024.html (7,579 bytes)
23. Re: Topband: Cone of silence (score: 1): Author: "john battin" <jbattin@msn.com>; Date: Thu, 12 May 2005 20:52:49 -0500; Just one quick comment. I can't think of an easy accurate way to measure radiation from a vertical antenna end. If the antenna is terminated in a center tapped "T", the T wire used as a "non-radiatin; /archives//html/Topband/2005-05/msg00026.html (9,246 bytes)
24. Re: Topband: Cone of silence (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 12 May 2005 22:54:20 -0400; I believe a good start is to leave the feed system with the matching transformer in place and just cut the beverage off, leaving only the vertical piece.>> When the antenna wire is just hanging there; /archives//html/Topband/2005-05/msg00028.html (9,867 bytes)
25. Re: Topband: Cone of silence (score: 1): Author: "john battin" <jbattin@msn.com>; Date: Fri, 13 May 2005 09:10:18 -0500; I believe a good start is to leave the feed system with the matching transformer in place and just cut the beverage off, leaving only the vertical piece.>> When the antenna wire is just hanging there; /archives//html/Topband/2005-05/msg00029.html (10,923 bytes)
26. Topband: Cone of silence (score: 1): Author: "Bruce" <k1fz@prexar.com>; Date: Fri, 13 May 2005 13:39:23 -0400; Thanks John for all the testing and letting us know the results. This may be one of the reasons why close to the ground Beverages are getting such nice patterns as the down leads are very short. Also; /archives//html/Topband/2005-05/msg00030.html (8,577 bytes)
27. Re: Topband: Cone of silence (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Fri, 13 May 2005 15:50:31 -0400; THESE issues are exactly why I took two months in the summer of 2003 to make careful measurements before re-doing my beverages. The impedance into the transformer was exactly 400 ohms ... a W8JI tran; /archives//html/Topband/2005-05/msg00032.html (9,136 bytes)

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