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61. Topband: G4ILO MF/HF Propagation Program (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Thu, 19 Feb 2004 13:33:31 -0500; I want to share with the global DX/contesting community a very handy piece of MF/HF propagation prediction software that I have been evaluating for a while. It is made by G4ILO who is a professional; /archives//html/Topband/2004-02/msg00281.html (8,426 bytes)
62. Topband: X Class Flare (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Wed, 25 Feb 2004 21:31:24 -0500; It looks like our long run of good 160 propagation conditions is coming to an end, courtesy of an X class flare currently in progress, in association with sunspot group #10564 located at N15E00. This; /archives//html/Topband/2004-02/msg00317.html (7,469 bytes)
63. Topband: 160 PSK31 Operation (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Sun, 14 Mar 2004 16:06:46 -0000; I try to operate 160 PSK31 as much as possible but rarely see any activity as of late. I heard some signals last night but could not decode them because of a loose connection in my homebrew interface; /archives//html/Topband/2004-03/msg00178.html (7,663 bytes)
64. Topband: XF4IH In FL (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Sun, 14 Mar 2004 16:37:05 -0000; On UTC the 13th XF4IH was 59+ on 80 meter phone and 579 on 160 CW here in west central Florida. On UTC the 14th I didn't hear a peep from them on 1824 kc! 73 & GUD DX, Thomas F. Giella, KN4LF Space &; /archives//html/Topband/2004-03/msg00180.html (7,903 bytes)
65. Topband: S9SS On 160 (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Mon, 15 Mar 2004 02:11:31 -0000; Antenna polarization plays a large role in the success of a long haul DX contact. As a medium frequency RF signal traverses Earth's magnetic lines of force in a perpendicular manner on high and mid l; /archives//html/Topband/2004-03/msg00187.html (8,834 bytes)
66. Topband: 3B9C Propagation (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Sat, 20 Mar 2004 15:05:49 -0000; If you look at the weather map last evening there was a strong extra-tropical surface-250 mb low off the coast of New England. This winter storm system produced an upward propagating Internal Buoyanc; /archives//html/Topband/2004-03/msg00225.html (10,259 bytes)
67. Topband: 3B9C Heard in Florida (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Tue, 23 Mar 2004 16:04:08 -0000; I heard 3B9C yesterday Monday evening UTC here in west Central Florida. He was 559 on my tee vertical and 579 on my low doublet. He peaked here at his local sunrise. The opening into our region from; /archives//html/Topband/2004-03/msg00235.html (8,187 bytes)
68. Topband: 3B9C Online Log Etc. (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Wed, 24 Mar 2004 15:01:41 -0000; I presume that most already have this online log website for 3B9C saved but just in case here it is. http://www.fsdxa.com/3b9c/online-logs.html . Last night I worked 3B9C on 3795/3790 kc phone and I; /archives//html/Topband/2004-03/msg00245.html (7,760 bytes)
69. Topband: 3B9C In Florida/ Receive Antennas (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Thu, 25 Mar 2004 15:19:43 -0000; I had the usual local QRN on the 160 tee vertical and even the low doublet last night. Very frustrating, especially in light of not having room for listening antennas. In any event I listened for 3B9; /archives//html/Topband/2004-03/msg00256.html (8,504 bytes)
70. Topband: 160 Listening Antennas (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Fri, 26 Mar 2004 14:26:14 -0000; I received MANY personal responses to my query concerning receiving antennas and their proximity to transmitting antennas. I received allot of valuable information and want to thank all who responded; /archives//html/Topband/2004-03/msg00275.html (7,365 bytes)
71. Topband: Antipodal Focusing Of RF Signals (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Mon, 29 Mar 2004 03:30:48 -0000; True antipodal focusing of transmitted RF signals does occur at HF frequencies. BUT as Bob Brown NM7M pointed out in an earlier post the ionosphere at medium frequencies is to heterogeneous to suppor; /archives//html/Topband/2004-03/msg00315.html (8,057 bytes)
72. Topband: MF Anti-Podal Propagation Enhancement (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Tue, 30 Mar 2004 00:06:06 -0000; Most of the propagation enhancement that we may mistake for antipodal focusing is actually via the E Valley/F Layer ducting mechanism. 73 & GUD DX, Thomas F. Giella, KN4LF Retired Space & Atmospheric; /archives//html/Topband/2004-03/msg00325.html (8,580 bytes)
73. Re: Topband: 160m Ant on 80m? (score: 1): Author: "Thomas Giella KN4LF" <kn4lf@tampabay.rr.com>; Date: Fri, 16 Apr 2004 14:11:21 -0000; It will certainly radiate and very efficiently BUT it will have a high takeoff angle of maximum radiation. I have a 160-10 meter horizontal doublet up at 40 feet and I flip a switch to make it a tee; /archives//html/Topband/2004-04/msg00114.html (8,150 bytes)

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