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101. TopBand: The Caribbean (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Sat, 26 Dec 1998 11:39:27 -0800 (PST); Friends in Radio Land, The questions about 160 meter propagation into the Caribbean are interesting as I think they will be found to deal more with noise than the physics of the ionosphere. I say tha; /archives//html/Topband/1998-12/msg00264.html (7,733 bytes)
102. TopBand: Re: W4ZV's posting (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Wed, 5 Aug 1998 17:00:16 -0700 (PDT); Friends in Radio Land, I have been in the background, following the discussion about wave polarization and angles of arrival. The discussion has been largely experimental in nature and I cannot add a; /archives//html/Topband/1998-08/msg00067.html (14,172 bytes)
103. TopBand: A bit more on propagtion (score: 1): Author: bobnm7m@cnw.com (Robert Brown); Date: Thu, 6 Aug 1998 05:11:41 -0700 (PDT); Friends in Radio Land I would like to add a few remarks to the posting I made yesterday in connection with Top Band Propagation. That, you will recall, had to do with signal refraction more than anyt; /archives//html/Topband/1998-08/msg00070.html (9,040 bytes)
104. Re: Topband: mag-field still sick ! (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Tue, 30 Sep 2003 05:39:30 -0700 (PDT); Wolf, Thanks for the posting; it's good to hear from you again. During times of high geomagnetic activity, the solar wind can distort the high-latitude lines of force and carry E- and F-region electr; /archives//html/Topband/2003-09/msg00146.html (7,343 bytes)
105. Topband: 3B9C Contacts (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Sat, 27 Mar 2004 14:59:16 -0800 (PST); Friends in Radio Land, The antipodal enhancement of 3B9C's signals in NA is not likely as there are "large geographic variations in ionospheric structure" (Davies, 1989). More to the point is magneto; /archives//html/Topband/2004-03/msg00296.html (7,122 bytes)
106. Re: Topband: Topband Propagation - Moon Effects ! (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Thu, 7 Oct 2004 11:43:37 -0700 (PDT); Friends in Radio Land, I do not doubt there are lunar tidal effects on the ionosphere, but like geomagnetic effects, they must be small in magnitude. The L-component of magnetic variations is found b; /archives//html/Topband/2004-10/msg00036.html (8,524 bytes)
107. Topband: QSB (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Wed, 13 Oct 2004 11:03:11 -0700 (PDT); Friends in Radi Land The recent postings about long-period (2-3 minute) QSB were interesting in that there seemed to be no magnetic/auroral activity at the time. This suggested an origin associated w; /archives//html/Topband/2004-10/msg00062.html (7,263 bytes)
108. Topband: Spotlight Effect (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Mon, 3 Jan 2005 14:53:57 -0800 (PST); Friends in Radio Land, Those interested in the "spotlight effect" would do well to read the work on dawn enhancements by Nick, VE7DXR, and Bob, VE3OSZ, in the November '99 and January 2002 issues, re; /archives//html/Topband/2005-01/msg00040.html (6,701 bytes)
109. Topband: Topband Propagation (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Fri, 7 Jan 2005 15:07:37 -0800 (PST); Friends in Radio Land, As I watch the postings on the Reflector, I see a growing interest in Topband propagation but the interest seems misguided, toward setting up many beacons instead of looking di; /archives//html/Topband/2005-01/msg00105.html (8,014 bytes)
110. Re: Topband: Topband Propagation (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Fri, 7 Jan 2005 19:09:03 -0800 (PST); Ford, What I am proposing amounts to using the control point method, of HF propagation, to find the variables which most influence MF propagation. But the data is local, small-scale, from above 30 km; /archives//html/Topband/2005-01/msg00108.html (8,564 bytes)
111. Re: Topband: Topband Propagation (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Fri, 7 Jan 2005 23:19:22 -0800 (PST); could this provide an indicator of what is going on? It seems to me, if refraction is occurring along certain paths, (read: skewing, spotlighting, peaks, nulls) then the atmospheric data at altitude; /archives//html/Topband/2005-01/msg00113.html (8,291 bytes)
112. Topband: A few words (score: 1): Author: Robert Brown <bobnm7m@cnw.com>; Date: Sat, 8 Jan 2005 08:47:51 -0800 (PST); Friends in Radio Land In treating low-band propagation, I am proposing we pay attention to the state of the neutral atmosphere, in which the ionosphere is embedded. I suggest we use the control point; /archives//html/Topband/2005-01/msg00129.html (8,211 bytes)

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