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References: [ +from:cebik@utkux.utcc.utk.edu: 367 ]

Total 367 documents matching your query.

281. [TowerTalk] Switching 450 ohm twinlead? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 6 Jun 1997 21:52:05 -0400 (EDT); Bill, Lots of good ways. a. Ceramic feed-through insulators through a piece of wood, with inside and outside connections. Works with window frames (wood) or siding. b. PVC pipe through the house side; /archives//html/Towertalk/1997-06/msg00255.html (9,452 bytes)
282. [TowerTalk] Switching 450 ohm twinlead? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 8 Jun 1997 07:26:34 -0400 (EDT); Heating elements that "drive out" moisture only work when powered. This is dandy for commercial and military stations that are powered 24 hours a day. For ham installations that may be on for only s; /archives//html/Towertalk/1997-06/msg00282.html (9,843 bytes)
283. [TowerTalk] XQ quad a question (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 9 Jun 1997 07:18:23 -0400 (EDT); John, I ran the 12 element XQuad on NEC-4, using 11 segments per side, in free space, as a quick check on the calculated/claimed gain. I think you will be disappointed. The feed Z was about 133 + j21; /archives//html/Towertalk/1997-06/msg00293.html (9,241 bytes)
284. [TowerTalk] Back to the XQuad (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 9 Jun 1997 11:46:59 -0400 (EDT); Please discard the previous note on the XQ. And thanks to Pete Soper, KS4XG, for catching my gapless model, which is simply wrong. Restoring the required gaps at the top and bottom of the beam loops; /archives//html/Towertalk/1997-06/msg00300.html (9,316 bytes)
285. [TowerTalk] 135' doublet patterns (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Tue, 10 Jun 1997 20:23:00 -0400 (EDT); In case you have ever wondered what the pattern of a traditional all-band 135' doublet looks like across the ham bands, I have just placed patterns (AZ and EL) modeled at 35 and 50 feet up for 80-10; /archives//html/Towertalk/1997-06/msg00339.html (8,048 bytes)
286. [TowerTalk] Soliciting Yagi comments (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 12 Jun 1997 06:43:15 -0400 (EDT); Frank, This is an opinion, because I have not modeled the Mosely antennas. However, their gain claims have been overzealous for the last 25 years or so, and reports I have received from a number of p; /archives//html/Towertalk/1997-06/msg00368.html (8,636 bytes)
287. [TowerTalk] Soliciting Yagi comments (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 12 Jun 1997 08:13:58 -0400 (EDT); I apologize for distributing the message to Frank to the list--it was not intended for general distribution, since it was a limited opinion. It did not included M2 since I have not modeled their ante; /archives//html/Towertalk/1997-06/msg00370.html (10,172 bytes)
288. FW: [TowerTalk] Moles are destroying fie (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Tue, 17 Jun 1997 07:25:31 -0400 (EDT); Please be careful in the selection and application of insecticides, especially when applying to large areas. Not only do moles eat grubs, but so too do birds, and insecticides of the wrong types can; /archives//html/Towertalk/1997-06/msg00550.html (8,184 bytes)
289. [TowerTalk] Cleaning aluminum (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 21 Jun 1997 06:46:25 -0400 (EDT); Everything to do with antennas has its cyclical ups and downs. Perhaps William Blake in the early 1800s had this group in mind when he wrote Thel's motto: Does the eagle know what is in the pit? Or; /archives//html/Towertalk/1997-06/msg00689.html (8,134 bytes)
290. [TowerTalk] 3-el Yagi models (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 22 Jun 1997 16:11:55 -0400 (EDT); A number of folks have asked me from time to time for copies of the model 3-element Yagis I use for comparative purposes. I have put them at my site (under the title "Three Element Yagis: Standards o; /archives//html/Towertalk/1997-06/msg00730.html (8,456 bytes)
291. [TowerTalk] Thanks: KLM vs. Hy-Gain (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Tue, 24 Jun 1997 07:42:15 -0400 (EDT); Re: F-B = 22 dB =/- 5 dB. Reading spec sheets on multi-element designs can be a bit trying, and a curve of the F-B would be nice from any antenna manufacturer. In general, Yagi designs can optimize t; /archives//html/Towertalk/1997-06/msg00805.html (8,372 bytes)
292. [TowerTalk] Phasing HF Yagis (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 25 Jun 1997 07:28:17 -0400 (EDT); It would appear that when you add the number of articles listed in recent posts on stack switching to other stacking material presented in the past in NCJ, there may be enough for a collection on th; /archives//html/Towertalk/1997-06/msg00850.html (8,468 bytes)
293. [TowerTalk] Yagi designs (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 25 Jun 1997 07:45:39 -0400 (EDT); A recent call for antenna designs for the WA9FOX site reminded me that there is a large collection of optimized designs available. With one of the ARRL big books, K6STI contributed his program YA, a; /archives//html/Towertalk/1997-06/msg00851.html (8,939 bytes)
294. [TowerTalk] aluminum Moxon rectangle (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 27 Jun 1997 09:01:15 -0400 (EDT); I have just posted some notes on the all-aluminum Moxon rectangle with which I have been experimenting. It is simple to build and may fulfill a need for some with space restrictions. Essentially, it; /archives//html/Towertalk/1997-06/msg00931.html (8,655 bytes)
295. [TowerTalk] th7 (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 28 Jun 1997 07:09:53 -0400 (EDT); One way to prevent the problem is to develop a procedure for checking antenna adjustments without the equipment in the line. This will ensure that only antenna system elements are involved in any odd; /archives//html/Towertalk/1997-06/msg00954.html (9,199 bytes)
296. [TowerTalk] 40-2CD Spacing and Interactions with WARC? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 1 May 1997 10:26:53 -0400 (EDT); I have a model (actually several) of the 40-2CD. It cannot be considered fully accurate, because the structure has a complex geometry of wires of different diameters, and not just in terms of stepped; /archives//html/Towertalk/1997-05/msg00016.html (9,192 bytes)
297. [TowerTalk] DCU-1 (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 3 May 1997 07:59:37 -0400 (EDT); It may depend on the degree of automation required. Between leaning on the buttons until the rotator reaches its heading and having presets, there is an intermediate level of automation in which the; /archives//html/Towertalk/1997-05/msg00072.html (10,632 bytes)
298. [TowerTalk] 2-element Yagis (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 7 May 1997 14:11:11 -0400 (EDT); Having fielded over the last couple of months a good number of basic questions on the performance of 2-element Yagis, I decided to place a little refresher at the website. Well, it grew like a dandel; /archives//html/Towertalk/1997-05/msg00193.html (7,952 bytes)
299. [TowerTalk] Low beam vs. higher dipoles? (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 9 May 1997 06:27:48 -0400 (EDT); Jeff, The general consensus of all that I have heard and experienced over the years is that if you can get the beam up at least 1/2wl, what you lose in lower take-off angles than the higher dipoles w; /archives//html/Towertalk/1997-05/msg00259.html (8,501 bytes)
300. [TowerTalk] Part 5, 2-element beams (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 9 May 1997 06:36:55 -0400 (EDT); In response to a number of questions, suggestions, and comments, I have added a 5th part to the 2-element Yagi notes on strategies for improving forward and rearward performance. Hope there is someth; /archives//html/Towertalk/1997-05/msg00260.html (7,247 bytes)

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