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Total 284 documents matching your query.

161. Re: [TowerTalk] ginpoles (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Fri, 03 Oct 2008 15:02:05 -0400
Rohn ginpoles are going for over a kilobuck? Holy crap! And I threw mine in, when I sold my 45g foldover! What an idiot. 'course, that WAS a few years ago. N2EA ______________________________________
/archives//html/Towertalk/2008-10/msg00034.html (6,879 bytes)

162. Re: [TowerTalk] spark gap/ insulated tower (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 06 Oct 2008 08:40:15 -0400
I recently erected an 80' base insulated Rohn 25G tower. It is guyed with philystran cable. I have been told that I should install a spark gap at the base insulators. If this is the case, what should
/archives//html/Towertalk/2008-10/msg00076.html (7,833 bytes)

163. Re: [TowerTalk] house entrance ground for RF ground? (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 06 Oct 2008 08:56:44 -0400
Gary, Jim Brown's comments were correct. The chap who said it was a bad idea was wrong. Sort of. You must get everything in the house as close to the same potential as possible. You say the shortest
/archives//html/Towertalk/2008-10/msg00078.html (11,011 bytes)

164. Re: [TowerTalk] inverted L vs T (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 09 Oct 2008 12:27:09 -0400
Here's a great example of how models can lead you astray. At the W2GD 160m contest site, in South Jersey, we had an inverted L as a secondary antenna. Mostly used for stateside contacts, but occasion
/archives//html/Towertalk/2008-10/msg00170.html (7,458 bytes)

165. [TowerTalk] SteppIR's domain name (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Fri, 10 Oct 2008 13:01:43 -0400
Well, gang, leaping to conclusions is often a waste of energy. But the good part of this off-topic post is that it reminded me to renew my domain name early, so as to avoid the problem. For that, I t
/archives//html/Towertalk/2008-10/msg00186.html (6,926 bytes)

166. Re: [TowerTalk] R7 above yagi (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 11 Oct 2008 12:27:27 -0400
Hello group, this time I am looking for help about the mounting of my R7 above of my old Triband yagi, At present I have my R7 mounted on top of a mast which extends out of the top of my tower by 7 f
/archives//html/Towertalk/2008-10/msg00193.html (8,204 bytes)

167. Re: [TowerTalk] cushcraft (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 13 Oct 2008 20:27:43 -0400
Sorry for the top post... original msgs, below. Wayne, N3RD had exactly the same problem with his new CC 40. And he was at 120' when the ground crew discovered it. Dino, I've had F12's that wouldn't
/archives//html/Towertalk/2008-10/msg00214.html (9,188 bytes)

168. [TowerTalk] Cushcraft kudos (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 14 Oct 2008 12:18:36 -0400
OK, enough CC bashing! It's obvious that a QC problem existed. I know that they were informed about it, but I also know there were still units in distribution, which couldn't be recalled. And if they
/archives//html/Towertalk/2008-10/msg00232.html (8,174 bytes)

169. Re: [TowerTalk] 160m inv. ell tuning network (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 20 Oct 2008 12:54:13 -0400
Lennie, A visit to the ARRL handbook, and/or antenna handbook is in order. As others have observed, depending on its length the inv. ell. should have a low base impedance, and not require a matching
/archives//html/Towertalk/2008-10/msg00411.html (9,091 bytes)

170. Re: [TowerTalk] "preventing backlash" (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 26 Oct 2008 01:03:42 -0400
A local ham told me to get some heavy duty hood springs from a 1950-1960's car and put them between my guy wire equalizer plates and earth anchors. This is to "prevent backlash" during storm force wi
/archives//html/Towertalk/2008-10/msg00489.html (7,258 bytes)

171. Re: [TowerTalk] Springing guy wires, and shock absorbing rotor linkages (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 26 Oct 2008 13:50:19 -0400
We seem to have an amazing capacity for drifting off topic. The initial question was..." should I use springs in my guy system, to prevent backlash?" The answer, for the most part was, 'NO'. Dumb ide
/archives//html/Towertalk/2008-10/msg00504.html (8,299 bytes)

172. Re: [TowerTalk] lossy traps, long (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 30 Oct 2008 12:12:10 -0400
I used a Fluke 80T-150U temperature probe, connected to a Fluke handheld DVM to measure temperature. All measurements are in degrees Fahrenheit. During the experiments, I measured temperature at thre
/archives//html/Towertalk/2008-10/msg00653.html (8,038 bytes)

173. Re: [TowerTalk] trap loss (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Fri, 31 Oct 2008 07:20:48 -0400
re: SteppIR vs. Kt34XA or kt36XA and reliability... Quoth Tony, in response to Julio and Mike: I'm sure you can find examples of any antenna that failed when it was brand new, and other examples of t
/archives//html/Towertalk/2008-10/msg00676.html (8,545 bytes)

174. Re: [TowerTalk] ic 751 tape (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 01 Nov 2008 08:42:26 -0400
Alfredo, The flex circuit which you identify as green tape is very likely no longer available from Icom. But you should contact Icom America, Inc., and ask. You never know what they may still have. I
/archives//html/Towertalk/2008-11/msg00000.html (6,523 bytes)

175. Re: [TowerTalk] how goobers take a tower down (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 03 Nov 2008 12:35:44 -0500
Looks very much like what I did, to take W3OV's foldover 25G down, recently. Ice damage to the lower section made it unsafe to climb, in my opinion. Although we folded it in half, and took the top se
/archives//html/Towertalk/2008-11/msg00046.html (7,495 bytes)

176. Re: [TowerTalk] house bracketed, unguyed (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Wed, 05 Nov 2008 12:34:27 -0500
Bottom posted comments...n2ea I followed the above instructions and couldn't find the Allowable Antenna Areas anywhere. :-( OTOH I do have a Rohn brochure entitled "Manufacturer's Technical Informati
/archives//html/Towertalk/2008-11/msg00130.html (9,548 bytes)

177. Re: [TowerTalk] guying self supporting towers (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 08 Nov 2008 08:54:13 -0500
Like so many threads, this one took on an extended life, sweeping up a lot of related topics. Bill, W7VP provided an extended analysis of the tower structure, which was quite thorough. One area, thou
/archives//html/Towertalk/2008-11/msg00195.html (7,838 bytes)

178. Re: [TowerTalk] Telrex beams (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 15 Nov 2008 08:15:16 -0500
Steve, W6TR said it quite nicely. Back in the day, when Mike Ercolino founded Telrex, yagis were built by formula, by guess, and by golly. His principal market was the military, with K2USA at Fort Mo
/archives//html/Towertalk/2008-11/msg00372.html (8,034 bytes)

179. Re: [TowerTalk] Dipole Center Connector (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 18 Nov 2008 09:54:54 -0500
Bob... I've never used one of those ready made things for a dipole, and I've been doing it since 1958. Simply take the coax, and strip it back so you have two pigtails of about 3" long. Take a simple
/archives//html/Towertalk/2008-11/msg00450.html (9,088 bytes)

180. Re: [TowerTalk] Sigma 12 (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 20 Nov 2008 18:37:34 -0500
I recently installed a Force 12 80M Sigma. It's like an H on it's side and fed asymmetrically which means the feed is off-set so you can reach it from the ground. It's a shortened antenna so it's got
/archives//html/Towertalk/2008-11/msg00505.html (7,701 bytes)

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