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61. Topband: Auroral Zone And PMAPS (score: 1): Author: kn4lf@hotmail.com (KN4LF, Thomas Giella); Date: Sat, 29 Dec 2001 00:54:42 -0500; .....particularly effective in absorbing HF radio signals and can render HF communications impossible throughout the polar regions...... The government boys are thinking in terms of absorption and u; /archives//html/Topband/2001-12/msg00164.html (8,485 bytes)
62. Topband: Delta Loop (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sat, 10 Nov 2001 22:12:09 -0500; I put up what I call a squashed delta loop in Colorado in 1994 and it worked just fantastic. I put the base of the antenna 10 feet above ground, and the apex at 100 feet above ground. Using the formu; /archives//html/Topband/2001-11/msg00038.html (7,967 bytes)
63. Topband: Delta Loop (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sun, 11 Nov 2001 16:57:06 -0500; Bob VE7BS made some very valid points in his previous email. We all get to hung up on lot's of radials near the feedpoint of a vertical antenna. They are certainly needed in the near field of a 1/4 w; /archives//html/Topband/2001-11/msg00046.html (8,608 bytes)
64. Topband: Poor Propagation On 160 (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Tue, 13 Nov 2001 18:18:36 -0500; Thomas KN4LF Says: The poor 160 meter band conditions as of late, even with low A/Ap and K/Kp values, is due to polar cap absorption and polar radio blackouts. Polar cap absorption and polar radio bl; /archives//html/Topband/2001-11/msg00052.html (9,615 bytes)
65. Topband: 160 Meter Propagation (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Thu, 15 Nov 2001 15:17:03 -0500; I am in agreement with all points that Bob NM7M and I covered in our previous email posts concerning 160 meter propagation. However I did err partially by stating that energetic protons are the main; /archives//html/Topband/2001-11/msg00058.html (7,813 bytes)
66. Topband: JT1 Polar Path (score: 1): Author: kn4lf@hotmail.com (KN4LF, Thomas Giella); Date: Tue, 20 Nov 2001 16:09:01 +0000; Looking at the propagation path via the W6EL propagation program, from the continental U.S. to JT1 is definitely a polar path through the aurora oval, so it will be a tougher propagation path for man; /archives//html/Topband/2001-11/msg00070.html (6,982 bytes)
67. Topband: Resistances Of Buried Radials (score: 1): Author: kn4lf@hotmail.com (KN4LF, Thomas Giella); Date: Wed, 21 Nov 2001 03:12:34 +0000; In John ON4UN's book he has a table of equivalent resistances of buried radial systems. Does anyone have a more detailed table or info then in the book? I would like to be able to model verticals/L/s; /archives//html/Topband/2001-11/msg00075.html (6,628 bytes)
68. Topband: JT1 Polar Path (score: 1): Author: kn4lf@hotmail.com (KN4LF, Thomas Giella); Date: Wed, 21 Nov 2001 11:55:35 +0000; 73, Thomas Giella, KN4LF; /archives//html/Topband/2001-11/msg00080.html (7,325 bytes)
69. Topband: Polar Cap Absorption On 160 (score: 1): Author: kn4lf@hotmail.com (KN4LF, Thomas Giella); Date: Wed, 21 Nov 2001 17:16:23 +0000; KN4LF Thomas Now Says: I wasn't talking in a present sense, at this particular moment, now, etc. concerning proton absorption on high latitude 160 propagation paths. I was talking about the possible; /archives//html/Topband/2001-11/msg00087.html (7,020 bytes)
70. Topband: 160 Meter Propagation Over Poles (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Fri, 14 Sep 2001 22:43:02 +0100; Strongest 160 meter signals ALWAYS propagate along paths of least absorption or resistance so to speak, that means lower latitude skewed paths. Over the poles 160 propagation underneath a relatively; /archives//html/Topband/2001-09/msg00039.html (6,517 bytes)
71. Topband: 1000MP Mark V (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sun, 16 Sep 2001 16:51:48 +0100; Thomas KN4LF Says: It's the built in preselector killing the broadcast station overload/IMD, a great idea bringing back this old technology. That's why I still use an old FT-101ET made in February 19; /archives//html/Topband/2001-09/msg00072.html (6,631 bytes)
72. Topband: Shack Lightning Protection (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sun, 16 Sep 2001 16:51:53 +0100; Peter 9V1PC Said: I'm after some advice on lightning protection. Thomas KN4LF Says: I have been studying and investigating lightning and it's effects for 35 years, 28 years as a Meteorological Consul; /archives//html/Topband/2001-09/msg00074.html (8,147 bytes)
73. Topband: Lightning Protection (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Mon, 17 Sep 2001 02:03:00 +0100; Tom W8JI Said: Water pipes are next to useless for lightning protection Peter, although they do make excellent safety grounds. It takes a large mat with multiple grounds to establish a really good li; /archives//html/Topband/2001-09/msg00077.html (8,509 bytes)
74. Topband: Lightning Protection (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Mon, 17 Sep 2001 21:21:54 -0400; Tom W8JI Said: The cause of lightning discharge is the large voltage gradient between earth and a cluster of charged moisture in the air. The only way to remove the charge is to have an actual path b; /archives//html/Topband/2001-09/msg00093.html (12,297 bytes)
75. Topband: EU Bcst Band Beacons (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sat, 4 Aug 2001 10:18:53 -0400; I hear the following stations in Florida. In winter they produce recoverable audio but only hets. in summer. From the mid Atlantic region through New England you can hear many more stations across th; /archives//html/Topband/2001-08/msg00013.html (6,865 bytes)
76. Topband: Trees For Antennas (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sun, 12 Aug 2001 12:26:22 -0400; I conducted experiments on 160, 80 and 40 meters with trees as transmitting antennas here in Florida, back in 1989. My interest began tied to being a Meteorologist and my 35 year study of lightning a; /archives//html/Topband/2001-08/msg00046.html (8,620 bytes)
77. Topband: 160 Meter Website Update (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Tue, 17 Jul 2001 18:16:24 -0400; Just an FYI I have added new links, a new domain name and web server to my KN4LF 160 Meter Amateur Radio Resources And More site. The new domain name is http://www.kn4lf.com . If anyone knows of othe; /archives//html/Topband/2001-07/msg00029.html (7,136 bytes)
78. Topband: New 160 Meter Message Forum (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Thu, 26 Jul 2001 14:39:11 -0400; Just an FYI, I have added a message forum to my "KN4LF 160 Meter Amateur Radio Resources And More website. This forum is designed to allow 160 meter operators to meet, stay in touch and discuss relat; /archives//html/Topband/2001-07/msg00058.html (7,006 bytes)
79. Topband: Wire Guage VS Resistance (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sat, 28 Jul 2001 12:15:31 -0400; Check out the numbers below. W8JI is correct, solid wire of the same diameter has lower resistance then stranded wire BUT it's very close to be negligible to worry about on 160 meters! I have used #1; /archives//html/Topband/2001-07/msg00068.html (8,245 bytes)
80. Topband: Summer Propagation (score: 1): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sat, 28 Jul 2001 15:02:58 -0400; Yes 160 meter propagation does exist in northern hemisphere summer but it's still way down compared to winter, especially below approximately 32 deg north lat. on NE-E paths to Europe and north Afric; /archives//html/Topband/2001-07/msg00070.html (7,978 bytes)

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