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Total 367 documents matching your query.

241. [TowerTalk] Whistling trap holes (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 13 Aug 1997 06:23:06 -0400 (EDT); I could not resist helping Roger and professor Helfenschmaltz in their efforts to so arrange weep holes in traps so that they played Dixie. As you know, I am located in the South, although not a nat; /archives//html/Towertalk/1997-08/msg00436.html (9,893 bytes)
242. [TowerTalk] Horizontal phased arrays (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 14 Aug 1997 08:15:41 -0400 (EDT); Thanks to the kindness of Siegfried Rambaum, KB2YVC/DE8FGO, I have finally acquired enough data on the HB9CV phased array to do an initial evaluation of its potential. The HB9CV 2-element array is a; /archives//html/Towertalk/1997-08/msg00459.html (9,178 bytes)
243. [TowerTalk] Equation wanted (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 18 Aug 1997 07:37:11 -0400 (EDT); Re: characteristic impedance formula. The formula in question is one of several formulations found in different engineering references. Jack Belrose has worked with them all. All are based on treatin; /archives//html/Towertalk/1997-08/msg00519.html (8,609 bytes)
244. [TowerTalk] Feeding EDZs (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Thu, 21 Aug 1997 09:01:40 -0400 (EDT); Those interested in Extended double Zepp antennas may or may not have seen the 2-meter version using "delay" lines by Rick Littlefield, K1BQT, in the Summer, 97 Communications Quarterly. Interestingl; /archives//html/Towertalk/1997-08/msg00584.html (8,655 bytes)
245. [TowerTalk] Link-coupled ATUs (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 22 Aug 1997 08:51:59 -0400 (EDT); I have added to my website a short note on link-coupled (inductively coupled) antenna tuners for balanced lines. The note in very scant fashion looks at the basic circuitry and notes the advantages a; /archives//html/Towertalk/1997-08/msg00596.html (9,057 bytes)
246. [TowerTalk] Initial link tuner response. . . (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 22 Aug 1997 14:53:44 -0400 (EDT); has been overwhelming! This is to thanks all those who have sent responses, with an assurance that those who also posed questions or comments needing repsonse will be handled over the weekend. Furthe; /archives//html/Towertalk/1997-08/msg00601.html (7,877 bytes)
247. [TowerTalk] Coil stock (e.g., Air-Dux, etc. (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 23 Aug 1997 06:08:01 -0400 (EDT); The interst in link-coupled tuners has led one individual (at least) to try to roll his own. He had a question I could not answer: who, these days, carries Air Dux or similar air wound coil stock? I; /archives//html/Towertalk/1997-08/msg00611.html (7,460 bytes)
248. [TowerTalk] End mounting of boom on 10 meter beam vs mount @ CG (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 24 Aug 1997 06:22:11 -0400 (EDT); Since my name was mentioned, I shall suggest a response, but certainly not the only one that can be made. Boom-end mounting a 10 meter beam with decent spacing from anything above or below is not lik; /archives//html/Towertalk/1997-08/msg00644.html (9,389 bytes)
249. [TowerTalk] Re: Air Dux and similar air wound coils (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 24 Aug 1997 06:54:07 -0400 (EDT); My thanks to all who replied to the question on the source of Air dux or similar air wound coils. Here is a compendium of the answers--some are repeats of others, but it is a way of saying thanks for; /archives//html/Towertalk/1997-08/msg00646.html (12,766 bytes)
250. [TowerTalk] Re: info needed (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 25 Aug 1997 14:28:24 -0400 (EDT); I have twice tried to cry for help against my senile brain, only to find that my plea apparently never reached the list--and I guess that is because I used "help" in the subject line, which is probab; /archives//html/Towertalk/1997-08/msg00682.html (8,021 bytes)
251. [TowerTalk] More on the EDZ "delay" line feed (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 27 Aug 1997 14:04:35 -0400 (EDT); Henry Pollock, WB4HFL, took up the challenge of trying the delay-line impedance transformation feed for a wire 10-meter EDZ. I added some notes on his initial experiment and some subsequent modeling; /archives//html/Towertalk/1997-08/msg00760.html (7,551 bytes)
252. [TowerTalk] VHF antenna orientation (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 29 Aug 1997 07:25:07 -0400 (EDT); Although the precise design may have some impact on the answer, in general, once an antenna is several wavelengths above ground, rightside up and upside down lose their meaning. For example, I have; /archives//html/Towertalk/1997-08/msg00791.html (9,110 bytes)
253. [TowerTalk] Stacking Supplement (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 30 Aug 1997 06:20:06 -0400 (EDT); A while back, I asked if anyone knew the whereabouts of a note on stacking as related to antenna gain from Roger Cox. My own--and similar searches by a number of very helpful folks on the list--turne; /archives//html/Towertalk/1997-08/msg00813.html (9,432 bytes)
254. [TowerTalk] Error in ARRL Antenna Book?? (score: 1): Author: L. B. Cebik" <cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Tue, 1 Jul 1997 07:14:34 -0400 (EDT); Morrison, Dean Straw is correct about the modeling of the Log-Yag for 20 meters: about 6.7 dBi in free space. His recommendation that one choose a "regular" Yagi as a more simply constructed and high; /archives//html/Towertalk/1997-07/msg00009.html (10,859 bytes)
255. [TowerTalk] Preventing cramps while climbing (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Wed, 2 Jul 1997 08:15:04 -0400 (EDT); Prunes also work, but may yield other problems for the tower climber. W4RNL -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests:; /archives//html/Towertalk/1997-07/msg00054.html (7,835 bytes)
256. [TowerTalk] wire antennas (RF resistance) (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 4 Jul 1997 14:24:45 -0400 (EDT); On the #18 vs. #12 wire in the quad question: Changing wire in the quad will likely require readjustment of all loops to reset performance at the vendor's specifications. Increase wire diameter in a; /archives//html/Towertalk/1997-07/msg00170.html (9,377 bytes)
257. [TowerTalk] trap notes (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Fri, 4 Jul 1997 21:07:41 -0400 (EDT); Some time back (April 7, to be a little more precise), I placed some notes on antenna traps at the site--mainly on how to calculate the equivalent R-L-C circuit values for each band in use. I have ad; /archives//html/Towertalk/1997-07/msg00180.html (8,342 bytes)
258. [TowerTalk] double traps (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sat, 5 Jul 1997 10:40:01 -0400 (EDT); Some further material on traps gelled, so I added it to the notes posted last evening, and in the process divided the entry into two parts. Same entry on the index page--placement of traps. But did w; /archives//html/Towertalk/1997-07/msg00186.html (7,405 bytes)
259. [TowerTalk] antenna gain (long) (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Sun, 6 Jul 1997 07:31:08 -0400 (EDT); Input, yes; insight, maybe not. But here goes. The gain estimations for monoband beams are fairly straightforward, in accord with Lawson et al. Multiband beams are another beast. In one sense, all e; /archives//html/Towertalk/1997-07/msg00211.html (14,542 bytes)
260. [TowerTalk] 75 ohm feedline (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 7 Jul 1997 07:03:48 -0400 (EDT); Here are a couple of notes that may be useful in deciding whether or not to use transformers with a run of 75 ohm cable with a 50-ohm antenna and a transmitter/amp designed for 50-ohm systems. Assum; /archives//html/Towertalk/1997-07/msg00241.html (10,296 bytes)

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