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21. Re: Topband: Recent Conditions (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Wed, 05 Dec 2007 06:45:27 +0000; I'm not sure that 50's are valid numbers for the SFI, at least for the values we see reported on a daily basis; I don't recall seeing it lower than 65. I'm sure that others on the list could clarify; /archives//html/Topband/2007-12/msg00046.html (8,851 bytes)
22. Re: Topband: 160 Meter Propagation (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Tue, 13 Jan 2009 23:08:06 +0000; Some years ago, with a great deal of help from NM7M, I wrote an article on propagation monitoring in QEX, "Medium Frequency Sunrise Enhancements", based on automated monitoring of signal strengths of; /archives//html/Topband/2009-01/msg00122.html (10,329 bytes)
23. Re: Topband: 160 Meter Propagation (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Wed, 14 Jan 2009 04:36:05 +0000; July/August 2001 Remember that I'm in western Canada, about 100 km from the open Pacific, though the Asiatic paths to here actually have to cross the spine of Vancouver Island, more like 300km. Howev; /archives//html/Topband/2009-01/msg00126.html (9,023 bytes)
24. Re: Topband: 160 Meter Propagation (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 15 Jan 2009 04:19:30 +0000; Here you go, Andrey. I hope it is useful to you. (there are a couple of typos in this copy that were eliminated in the final QEX copy, but they are not important) go to http://www3.telus.net/public/s; /archives//html/Topband/2009-01/msg00137.html (9,032 bytes)
25. Re: Topband: 160 Meter Propagation (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 15 Jan 2009 19:57:33 +0000; Indeed they might have been, Bill. One of the reasons for writing the original article was to point out that the engineering was feasible, and that there were various research possibilities for those; /archives//html/Topband/2009-01/msg00142.html (9,320 bytes)
26. Topband: Fwd: Re: 1.99 and beacons (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 07 May 2009 04:41:16 +0000; This might be a good use for software-defined radios for those who have them. Unfortunately, the 190kHz bandwidth of the RFSpace SDR-IQ is just too narrow for this, but one can record simultaneous s; /archives//html/Topband/2009-05/msg00034.html (7,393 bytes)
27. Re: Topband: A desert ? (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Fri, 02 Apr 2010 05:39:46 +0000; Check out the Pacific Asian Log, Mike: http://www.radioheritage.net/PAL.asp You can either check it out online or download a pdf file. The Radioheritage Foundation appreciates a donation, but it's no; /archives//html/Topband/2010-04/msg00007.html (8,790 bytes)
28. Re: Topband: Bob NM7M SK (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Tue, 25 May 2010 05:35:34 +0000; Thanks for passing this on Carl. Bob was a great inspiration to those of us trying to understand medium frequency propagation. I'm sorry I never met him personally in spite of our geographical closen; /archives//html/Topband/2010-05/msg00051.html (7,904 bytes)
29. Re: Topband: K3NA Loop Array (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Wed, 23 Jun 2010 12:16:50 -0700; Consider me to also not be an expert either in Beverage antenna theory, or in wave propagation. I wonder however whether some of the idea that the Beverage works best over poor ground dates back to t; /archives//html/Topband/2010-06/msg00063.html (10,140 bytes)
30. Re: Topband: K3NA Loop Array (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 24 Jun 2010 05:23:43 +0000; Thanks. Too many years ago, near Tofino, BC, it was noted that a 1500' wire running perpendicular to the shore (and even with several hundred feet over salt water, leading to an offshore island and p; /archives//html/Topband/2010-06/msg00065.html (10,471 bytes)
31. Re: Topband: Verifying integrity of 75 ohm coax. (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 21 Nov 2013 04:31:26 +0000; What brand of grease is generally used for this purpose? Dow Corning #4 is the available "professional" grease in these parts, but is that too thick? Thanks. best wishes, Nick VE7DXR At 16:06 20-11-1; /archives//html/Topband/2013-11/msg00302.html (11,548 bytes)
32. Re: Topband: another carrier (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Sun, 23 Mar 2014 17:52:23 +0000; I make it about 125 to 130 degrees from Victoria, BC (local time 10:40am PDT, so, likely ground wave, but not strong). The AM broadcaster on 1680 kHz nulls a few degrees further south. This is using; /archives//html/Topband/2014-03/msg00183.html (8,232 bytes)
33. Re: Topband: Modeling the proverbial "vertical on a beach" (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Fri, 15 Aug 2014 03:55:38 +0000; I wonder if they had read the report mentioned by Chuck Hutton a few days ago: http://downloads.bbc.co.uk/rd/pubs/reports/1968-45.pdf It would seem to shed some light on what they observed. There are; /archives//html/Topband/2014-08/msg00134.html (12,241 bytes)
34. Re: Topband: WATCH OUT !!Did you get a new cable modem from Comcast? Arris Modem equal lots of QRM (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Fri, 24 Oct 2014 15:36:33 +0000; Jameco continues to sell linear wall warts, if you want them new. best wishes, Nick VE7DXR At 05:26 24-10-14, you wrote: On 10/23/2014 3:33 PM, JC wrote: So watch out is you have Comcast cable modem,; /archives//html/Topband/2014-10/msg00152.html (8,371 bytes)
35. Re: Topband: 160m RX antenna testing surrogates? (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Sat, 20 Dec 2014 19:32:27 +0000; The fact that the world outside the Americas has 9kHz rather than 10 kHz separation between broadcasters could help you here Jim. Not as much help for South America, though there is an Argentinian on; /archives//html/Topband/2014-12/msg00348.html (8,642 bytes)
36. Re: Topband: Salt-Water Qth! (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 02 Apr 2015 03:53:41 +0000; Please see the articles on sea gain (from technical reports of the BBC Engineering Department), referenced by Chuck Hutton, which I believe addresses this very phenomenon. 73, Nick As I recall, the v; /archives//html/Topband/2015-04/msg00030.html (8,421 bytes)
37. Re: Topband: Waller Flag Question (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Mon, 07 Sep 2015 06:57:28 +0000; And if you look at US Patent 2,247,743, it appears that Harold Beverage conceived of a horizontal Flag around 1941. best wishes, Nick in the "History of the Flag Antenna" The earliest fef. to the Ter; /archives//html/Topband/2015-09/msg00021.html (8,646 bytes)
38. Re: Topband: Back Scatter ? (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Thu, 16 Jun 2016 05:41:41 +0000; Hi Bruce, Does the QSB vary regularly at say a 0.5Hz or 1Hz rate? Could it be another station on the channel that is not exactly the same frequency, not strong enough to deliver audio, but strong eno; /archives//html/Topband/2016-06/msg00094.html (8,187 bytes)
39. Re: Topband: Bowtie Flags (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Mon, 12 Dec 2016 16:35:14 +0000; What specific improvements did you note when the Delta was raised Bruce? Thanks, Nick VE7DXR ** Dennis, Is there a photo or sketch available of your antenna anywhere by email ? Note: Height above gro; /archives//html/Topband/2016-12/msg00163.html (7,100 bytes)
40. Re: Topband: Bowtie Flags (score: 1): Author: Nick Hall-Patch <nhp@ieee.org>; Date: Mon, 12 Dec 2016 19:59:01 +0000; Thanks Bruce. Sounds like practical constraints led to a worthwhile outcome. 73 Nick VE7DXR Nick, Although I did not measure it, the front to back, and front to side is better, overall more quiet. It; /archives//html/Topband/2016-12/msg00165.html (8,399 bytes)

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