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81. [TowerTalk] Something old, something new (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 30 Nov 1998 07:20:23 -0500 (EST); This note will let all know that the utk.edu UNIX system is back on line. It seems to have preserved all 350 messages that arrived while it was down. Added to the site is an old presentation I once m; /archives//html/Towertalk/1998-11/msg00717.html (8,007 bytes)
82. [TowerTalk] Where Do I Hang My Hat? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 31 Oct 1998 21:34:18 -0500 (EST); In answer to some recent questions received on "capacity" hat placement, I have added a note on the subject at my site. The brief answer is--on the end for max electrical efficiency. That is not news; /archives//html/Towertalk/1998-10/msg00001.html (7,194 bytes)
83. [TowerTalk] W8JK / HB9CV / ZL special ? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 5 Oct 1998 08:10:26 -0400 (EDT); Morrison, The 8JK is usually constructed as a fixed wire antenna, since it is bi-directional. Dimensions are not critical, so general guidance in manuals should suffice to construct one. Calculating; /archives//html/Towertalk/1998-10/msg00076.html (10,130 bytes)
84. [TowerTalk] Extended Double Zepp question (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 8 Oct 1998 03:35:22 -0400 (EDT); Tom, The EDZ is a non-resonant antenna about 1.25 wl long. The exact impedance values at the feedpoint will vary a bit depending on exactly how long you make it, but the pattern will not vary by very; /archives//html/Towertalk/1998-10/msg00168.html (8,839 bytes)
85. [TowerTalk] HF Yagi Interaction - 40M Element Model? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 14 Oct 1998 07:55:02 -0400 (EDT); The problem of modeling linear loads in NEC (-2 or -4) is multi-faceted. First, both versions of NEC have difficulties with angular junctions involving materials with different diameters. Note that t; /archives//html/Towertalk/1998-10/msg00402.html (10,970 bytes)
86. [TowerTalk] Extended Double Zepp Problem (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 16 Oct 1998 11:06:49 -0400 (EDT); Tom, I modeled your antenna sketches on NEC-4 using a height of 40' above average ground. For near 50 ohm use, the wire lengths are way short, quite possibly because, like most antenna formulas, they; /archives//html/Towertalk/1998-10/msg00500.html (9,152 bytes)
87. [TowerTalk] 10 METERS GIANT ANTENNA (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 19 Oct 1998 07:42:03 -0400 (EDT); Let me second the note about the narrowing beamwidth of side-by-side Yagis--at optimal gain spacing, the beamwidth halves. So if beamwidth is an issue, vertical stacking preserves it, while horizonta; /archives//html/Towertalk/1998-10/msg00625.html (7,864 bytes)
88. [TowerTalk] re: rhombics (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 21 Oct 1998 06:52:17 -0400 (EDT); Rick, Your modeling parallels mine. Narrow primary beamwidth for a fixed antenna with many side lobes. The advantages appear to be two. a. Many fewer types of moving parts to wear out, and hence usua; /archives//html/Towertalk/1998-10/msg00759.html (10,384 bytes)
89. [TowerTalk] Open Wire Line (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 22 Oct 1998 22:25:18 -0400 (EDT); For short runs or casual use, #14 and #12 in open wire parallel feedline may be satisfactory. However, for very long runs or just to have a reserve capability, following Tom's lead and using #8 or #; /archives//html/Towertalk/1998-10/msg00832.html (8,651 bytes)
90. [TowerTalk] Everything Old is New Again (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 28 Oct 1998 20:49:26 -0500 (EST); I have uploaded a note at my site with the above title in the little history listings of the index. It is a look at a combination October, 1937, set of articles on small loops. Several folks sent me; /archives//html/Towertalk/1998-10/msg00963.html (8,026 bytes)
91. [TowerTalk] Driv Elem Tuning (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 2 Sep 1998 06:10:54 -0400 (EDT); In most Yagi designs, adjusting the driven element will have the sole effect of changing the feed point reactance. In some designs, the feedpoint resistance wil also change as a function of length,; /archives//html/Towertalk/1998-09/msg00041.html (9,407 bytes)
92. [TowerTalk] SCV update (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 7 Sep 1998 11:08:50 -0400 (EDT); Since NCJ has now printed the first installment of the 5-part series I did for them, I have placed Part 1 at my site. In essence, it contains the same information that was previsously at the site, al; /archives//html/Towertalk/1998-09/msg00171.html (8,185 bytes)
93. [TowerTalk] Running Cables Into Shack (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Tue, 8 Sep 1998 11:23:13 -0400 (EDT); There are many ways of runningwires from the attic to the shack, so my experiences are only e pluribus unum. At one location, I cut a ceiling hole at a room corner. I then build a frame from floor to; /archives//html/Towertalk/1998-09/msg00185.html (9,072 bytes)
94. [TowerTalk] New modeling notes at the site (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 12 Sep 1998 09:32:34 -0400 (EDT); For those interested in some of the cautions necessary at the fringes of modeling, I have placed some notes on Reading Trends with Caution from NEC-2 and NEC-4, based on some work with free space and; /archives//html/Towertalk/1998-09/msg00290.html (7,634 bytes)
95. [TowerTalk] Verticals with Elevated Radials (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 12 Sep 1998 20:34:45 -0400 (EDT); Use care in interpreting modeling results relative to the real world. It is easy (too easy?) in a model to make a perfectly balanced n-wire radial system and quite another to make one in the field.; /archives//html/Towertalk/1998-09/msg00311.html (9,789 bytes)
96. [TowerTalk] antenna modeling with NEC-WIN BASIC (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 17 Sep 1998 03:54:25 -0400 (EDT); This is surprising. NEC-Win Basic is a Windows product using NEC-2 and I am surprised that it is enclosed with a book. The program uses a spreadsheet format wire entry "page," with click access to en; /archives//html/Towertalk/1998-09/msg00447.html (12,111 bytes)
97. [TowerTalk] Vertical Dipoles and Ground Planes (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 19 Sep 1998 09:26:31 -0400 (EDT); Discussions that have appeared from time-to-time about the advisability of having a local (1/4 wl) radial ground plane beneath antennas like the vertical dipole led me to wonder what some systematice; /archives//html/Towertalk/1998-09/msg00475.html (8,054 bytes)
98. [TowerTalk] Vertical Dipoles and Ground Planes Update (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 20 Sep 1998 07:26:08 -0400 (EDT); I have added some notes on the questions that were left over from the initial part of the study. Hope the material is useful. -73- LB, W4RNL L. B. Cebik, W4RNL /\ /\ * / / / (Off)(423) 974-7215 1434; /archives//html/Towertalk/1998-09/msg00483.html (7,344 bytes)
99. [TowerTalk] G5RV (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 27 Sep 1998 20:55:51 -0400 (EDT); The G5RV is simply--as an antenna--a 102' length of wire center fed. This length has been used since the late 20s or early 30s with parallel feeders to balanced link-coupled antenna tuners. The G5RV; /archives//html/Towertalk/1998-09/msg00690.html (9,956 bytes)
100. [TowerTalk] a bit of reorganization (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 6 Aug 1998 07:38:01 -0400 (EDT); When I started my "radio" page, I thought I might end up with perhaps a half dozen linked articles, and so I placed all the links at the top and the few reading items at the bottom. Time (and some in; /archives//html/Towertalk/1998-08/msg00136.html (8,056 bytes)

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