Mail Archive Search: <+from:Thomas Giella>

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References: [ +from:Thomas: 325 ] [ Giella: 245 ]

Total 186 documents matching your query.

61. Topband: Lightning Protection (score: 146): 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)
62. Topband: EU Bcst Band Beacons (score: 138): 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)
63. Topband: Trees For Antennas (score: 146): 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)
64. Topband: 160 Meter Website Update (score: 138): 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)
65. Topband: New 160 Meter Message Forum (score: 138): 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)
66. Topband: Wire Guage VS Resistance (score: 138): 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)
67. Topband: Summer Propagation (score: 138): 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)
68. Topband: 160 Wire Resistance/Propagation (score: 138): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sun, 29 Jul 2001 10:59:40 -0400; KN4LF Says: Yeah, I realized my error in reporting dc resistance AFTER I sent the email to the list. :<( Though I have always used #12 stranded and covered wire for my antennas, I do use solid wire o; /archives//html/Topband/2001-07/msg00076.html (7,103 bytes)
69. Topband: Ladderline (score: 138): Author: kn4lf@tampabay.rr.com (KN4LF, Thomas Giella); Date: Sun, 10 Jun 2001 23:43:14 -0400; K2WH: I use 450 ohm ladder line as a feedline with my 160 1/2 wave T. One side of the ladderline goes to the radial system, the other to the T. I use a homebrew balanced matching network (two roller; /archives//html/Topband/2001-06/msg00016.html (7,955 bytes)
70. Topband: 160 Meter Antenna Help (score: 138): Author: kn4lf@hotmail.com (Thomas Giella, KN4LF); Date: Thu, 24 May 2001 10:52:31 -0400; On 160 meters, for dxing I use a T antenna with a 252 foot flat top (broadside NW-SE), a 75 foot vertical section, a second 55 foot section (linear load) and one #12 1/4 wave radial on the ground sur; /archives//html/Topband/2001-05/msg00049.html (10,104 bytes)
71. Topband: Topband Real Estate (score: 138): Author: kn4lf@hotmail.com (Thomas Giella, KN4LF); Date: Wed, 18 Apr 2001 10:22:50 -0400; A drive around your new QTH in a circle within approx. 1/4-1 mile with the car radio on 1710 kc will give you a basic idea of the general QRN in the area but I've also found that a portable shortwave; /archives//html/Topband/2001-04/msg00039.html (7,521 bytes)
72. Topband: 160 Antenna's Modeled (score: 138): Author: kn4lf@hotmail.com (Thomas Giella, KN4LF); Date: Wed, 18 Apr 2001 10:41:44 -0400; I've been busy lately modeling a variety of 160 meter antenna's on EZNEC 3.0. For ground type I used real minimec and ground description (conductivity) medium, frequency 1850 kc. From what I understa; /archives//html/Topband/2001-04/msg00040.html (8,285 bytes)
73. Topband: Water Conductivity (score: 138): Author: kn4lf@hotmail.com (Thomas Giella); Date: Wed, 21 Mar 2001 09:24:20 -0500; Conductivity of flood water is usually much higher then ground water, as it has come into contact with numerous surface materials and pollutants. Also ground water is also much more conductive then m; /archives//html/Topband/2001-03/msg00108.html (7,146 bytes)
74. Topband: 160 Meter Propagation (score: 130): Author: kn4lf@webtv.net (Thomas Giella); Date: Mon, 4 Dec 2000 10:32:16 -0500 (EST); There is the A index which is centered on Boulder, Co. and the Ap index which is a sum of many A index measurments taken simultaneously around the globe, including Boulder. It works in a similar way; /archives//html/Topband/2000-12/msg00036.html (9,773 bytes)
75. Topband: Dipole and Ladder Line (score: 138): Author: kn4lf@webtv.net (Thomas Giella); Date: Mon, 13 Nov 2000 18:44:50 -0500 (EST); Bill Asked: Can anyone tell me if the 70 ft. vertical length of ladder line that feeds my 160 meter dipole contributes anything to my reception of signals. Take Care, Thomas F. Giella KN4LF -- FAQ on; /archives//html/Topband/2000-11/msg00068.html (7,355 bytes)
76. Topband: Balanced Line Radiation (score: 130): Author: kn4lf@webtv.net (Thomas Giella); Date: Mon, 13 Nov 2000 23:06:21 -0500 (EST); Thomas KN4LF Says: To clarify my previous statement, in "my" personal experience I've never been able to get current exactly balanced in twinlead, open wire line etc. to prevent radiation, even when; /archives//html/Topband/2000-11/msg00070.html (7,211 bytes)
77. Topband: 160 Meter Propagation (score: 130): Author: kn4lf@webtv.net (Thomas Giella); Date: Tue, 14 Nov 2000 13:12:19 -0500 (EST); Thomas KN4LF Says: I agree with Bob's comments. 160 meter propagation is complicated but can be explained in simpler terms. The bottom line is this: 160 meter propagated signals will ALWAYS seek the; /archives//html/Topband/2000-11/msg00076.html (7,555 bytes)
78. Topband: 160 Meter Propagation (score: 130): Author: kn4lf@webtv.net (Thomas Giella); Date: Tue, 14 Nov 2000 14:11:20 -0500 (EST); Thomas KN4LF Says: ????It's kind of like not seeing the forest for the trees. If 160 meter propagation does not follow the great circle route due to absorption through partial or total daytime stretc; /archives//html/Topband/2000-11/msg00078.html (8,062 bytes)
79. Topband: Re: [160M] Wide band noise (score: 130): Author: kn4lf@webtv.net (Thomas Giella); Date: Fri, 17 Nov 2000 10:52:09 -0500 (EST); Take Care, Thomas KN4LF -- FAQ on WWW: http://www.contesting.com/FAQ/topband Submissions: topband@contesting.com Administrative requests: topband-REQUEST@contesting.com Problems: owner-topband@contes; /archives//html/Topband/2000-11/msg00089.html (6,949 bytes)
80. Topband: JA Path (score: 130): Author: kn4lf@webtv.net (Thomas Giella); Date: Sun, 26 Nov 2000 06:24:22 -0500 (EST); Take Care, Thomas KN4LF -- FAQ on WWW: http://www.contesting.com/FAQ/topband Submissions: topband@contesting.com Administrative requests: topband-REQUEST@contesting.com Problems: owner-topband@contes; /archives//html/Topband/2000-11/msg00169.html (6,805 bytes)

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