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21. Topband: Power coupling (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Mon, 6 May 2002 07:29:17 -0700 (PDT); Friends in Radio Land - In his earlier message to K9LA and me, Bill, W4ZV, tried to summarize the power coupling issue in three points, saying first, it is primarily an issue for stations located wit; /archives//html/Topband/2002-05/msg00066.html (9,604 bytes)
22. Topband: Another small item or two (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Mon, 6 May 2002 08:21:13 -0700 (PDT); Friends in Radio Land - In his recent posting, Tom, W8JI, brought up new points in the power coupling discussion: the alignment of "random ions" and the correctness of power coupling calculations., F; /archives//html/Topband/2002-05/msg00067.html (8,258 bytes)
23. Topband: A wee bit more on power coupling (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Tue, 7 May 2002 08:19:46 -0700 (PDT); Friends in Radio Land - There seems to be some confusion about insertion loss from power coupling of antennas across the USA. So I list below principal features for verticals for the four corners of; /archives//html/Topband/2002-05/msg00072.html (8,371 bytes)
24. Topband: A wee bit more on power coupling (score: 1): Author: Robert Brown <bobnm7m@cnw.com> (Robert Brown); Date: Wed, 8 May 2002 21:18:10 -0700 (PDT); Tom, No, that is not what I said nor meant; there was no mention of a vertically polarized signal with the same ERP. The -24 dB insertion loss or power coupling is the result of a horizontally polari; /archives//html/Topband/2002-05/msg00078.html (8,576 bytes)
25. Topband: A wee bit more on power coupling (score: 1): Author: Robert Brown <bobnm7m@cnw.com> (Robert Brown); Date: Thu, 9 May 2002 08:08:10 -0700 (PDT); Pete, No, you are confused, indeed. My remark about verticals was related to THEIR low insertion loss to the north. I made no mention of dipoles in the original comparisons for verticals in NA and EU; /archives//html/Topband/2002-05/msg00081.html (8,711 bytes)
26. Topband: More on 160 dipoles (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Thu, 9 May 2002 17:15:25 -0700 (PDT); Friends in Radio Land - Power coupling is greatest when the E-field from an antenna is parallel to the geomagnetic field and the least when the two are perpendicular to each other. For the parallel c; /archives//html/Topband/2002-05/msg00087.html (12,466 bytes)
27. Topband: An optical analog (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Sat, 11 May 2002 07:05:39 -0700 (PDT); Friends in Radio Land - Earlier, I sent some 80 meter power coupling data to Bill, W4ZV, and he was puzzled by the small change from 160 meter data, thinking it would have been greater. So let me off; /archives//html/Topband/2002-05/msg00108.html (10,812 bytes)
28. Topband: PCL Summary (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Mon, 13 May 2002 09:46:36 -0700 (PDT); Friends in Radio Land - Given the recent discussion of power coupling loss (PCL) and 160 meter propagation, let me give a brief summary of the essential points. 1. The coupling or transfer of RF ener; /archives//html/Topband/2002-05/msg00117.html (8,277 bytes)
29. Topband: Power Coupling on 160 meters (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Tue, 30 Apr 2002 07:58:48 -0700 (PDT); Friends in Radio Land - The loss in signal intensity on the low-bands, like 160 meters, is due to the fact that electromagnetic waves are elliptically polarized in the ionosphere. Further, there is a; /archives//html/Topband/2002-04/msg00078.html (8,469 bytes)
30. Topband: K-sums (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Fri, 4 Jan 2002 12:38:00 -0800 (PST); Friends in Radio Land Low K-sums in December at Meanook, Alberta and Potsdam, Germany were from December 9 to 11; otherwise, quiet days were spotty, the 13th as well as the 20th and the 2nd. But ther; /archives//html/Topband/2002-01/msg00011.html (6,526 bytes)
31. Topband: Meanook again (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Wed, 16 Jan 2002 08:34:31 -0800 (PST); Friends in Radio Land - The Meanook magnetometer data is in for early January and a nice quiet spell, with K-sums 1, 2, 0 and 3, was noted in the four-day period from Jan 3-6. Add 27 days and see if; /archives//html/Topband/2002-01/msg00107.html (6,992 bytes)
32. Topband: In defense of Meanook (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Thu, 17 Jan 2002 08:32:03 -0800 (PST); Friends in Radio Land - The Meanook K-sums from an auroral magnetmeter are offered to serve as a guide to high latitude propagation. The suggestion is that there will be a recurrence in conditions wi; /archives//html/Topband/2002-01/msg00121.html (7,313 bytes)
33. Topband: Heads up again! (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Mon, 3 Dec 2001 05:44:27 -0800 (PST); Friends in Radio Land - Believe it or not, my "heads up" on November 20 was right on the money, with the magnetic activity dropping like a rock for Nov. 27-30. The K-sums for Meanook were 3, 3, 2, 2.; /archives//html/Topband/2001-12/msg00009.html (6,492 bytes)
34. Topband: More on aurora (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Sat, 15 Dec 2001 09:34:19 -0800 (PST); Friends in Radio Land - Take a look at the November 2001 issue of the National Geographic Magazine. There is a terrific article on aurora, with spectacular photos and a good discussion of how it is p; /archives//html/Topband/2001-12/msg00050.html (6,360 bytes)
35. Topband: Meanook again (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Mon, 17 Dec 2001 15:58:50 -0800 (PST); Friends in Radio Land - As advertised here earlier, the effects of the solar wind on the magnetosphere decrease as we approach the solstices: Magnetic storms per month 1,475 storms from 1868 to 1992; /archives//html/Topband/2001-12/msg00067.html (7,788 bytes)
36. Topband: condx - more (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Fri, 28 Dec 2001 14:20:42 -0800 (PST); so here is my contribution to the exchange: Friends in Radio Land - Like you, I have seen a number of complaints or words of praise for propagation in recent days. As one who used the Meanook K-sums; /archives//html/Topband/2001-12/msg00150.html (9,473 bytes)
37. Topband: Kp Data (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Mon, 5 Nov 2001 03:48:01 -0800 (PST); Friends in Radio Land The October magnetic data is in from Gottingen and the good days were the 24th, 18th and 7th, with Kp sums of 2, 6 and 6; the bad days were the 22th, 3rd and 2nd, with Ap above; /archives//html/Topband/2001-11/msg00018.html (6,674 bytes)
38. Topband: A rebuttal (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Tue, 13 Nov 2001 20:14:07 -0800 (PST); Friends in Radio Land In a recent posting that was rather long and rambling, Thomas Giella, KN4LF, said some things that are just "flat out wrong", like "These high energy protons emitted in a solar; /archives//html/Topband/2001-11/msg00054.html (9,784 bytes)
39. Topband: A"Heads Up" (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Tue, 20 Nov 2001 03:42:42 -0800 (PST); Friends in Radio Land - The Kp data for the first half of November is in hand and there is a good chance that magnetic activity will be very low around Nov. 28-30. Take a look and see if that's right; /archives//html/Topband/2001-11/msg00069.html (6,496 bytes)
40. Topband: JT1 Polar Path (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Wed, 21 Nov 2001 07:14:00 -0800 (PST); Friends in Radio Land, In reply, let me ask "what proton absorption?" A check of today's NOAA satellite at synchronous altitude shows background levels of proton fluxes and electrons too. There's no; /archives//html/Topband/2001-11/msg00085.html (7,477 bytes)

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