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61. [TowerTalk] SteppIR beams (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sat, 20 Dec 2003 20:49:09 -0000; I had a 3 element SteppIR up in Vermont through one winter. At one point, I had 1" of radial ice on the elements. They sagged, but didn't break. Withstood 50-60kt winds as well, but not with the icel; /archives//html/Towertalk/2003-12/msg00625.html (8,186 bytes)
62. [TowerTalk] copperweld (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sat, 20 Dec 2003 21:25:16 -0000; I find copperweld and stainless wire both to be very hard to work, while soft-drawn copper is more docile, but stretches. My wire of choice is #12, PE insulated, multi-strand copperweld. Radioworks s; /archives//html/Towertalk/2003-12/msg00626.html (7,530 bytes)
63. [TowerTalk] insurance (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Tue, 23 Dec 2003 09:41:03 -0000; This turns out to be a great topic. In particular, the links to MSN and LA Times articles, and the CA Dept. of Insurance were informative. Be careful, before you file a claim or report a possible cla; /archives//html/Towertalk/2003-12/msg00702.html (8,956 bytes)
64. [TowerTalk] Yaesu rotor question (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sun, 4 Jan 2004 17:25:20 -0000; I have a Yaesu G1000dxa rotor. Contemplating a pole tower in my suburban MD location. MA 550 or MA 770. For aesthetic reasons, it may wind up house bracketed, which would necessitate topside rotor mo; /archives//html/Towertalk/2004-01/msg00062.html (8,040 bytes)
65. [TowerTalk] yaesu rotor answer (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sun, 4 Jan 2004 18:43:53 -0000; This may save several of you a reply. K8WWV had a rotor mount section fabricated, which dealt with the tilt-over loads on his G800dxa. It's a good solution. In my case, the appeal of the house-bracke; /archives//html/Towertalk/2004-01/msg00065.html (6,934 bytes)
66. [TowerTalk] BPL redux (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Thu, 8 Jan 2004 18:56:33 -0000; A tad off reflector topic, but of substance nonetheless: <snip> The strategy for combatting BPL should be: 1) Regulatory uncertainty 2) Not enough performance to be competitive with other technologie; /archives//html/Towertalk/2004-01/msg00146.html (9,248 bytes)
67. [TowerTalk] BPL.... very important point missed (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Thu, 8 Jan 2004 19:08:23 -0000; I appologize for piling on, here...but it hadn't occured to me that BPL would enable power companies to automate their meter reading. A digital back-channel, if you will. Thanks to Jim Lux for making; /archives//html/Towertalk/2004-01/msg00149.html (7,462 bytes)
68. [TowerTalk] more BPL noise... (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Fri, 9 Jan 2004 12:52:00 -0000; Maybe this isn't so far off topic, after all... Thanks to Mel, KD7DCR and Mike, W4EF for their comments, and to Jim Lux for his private comm's on the topic after my post. Jim made a good point about; /archives//html/Towertalk/2004-01/msg00162.html (8,435 bytes)
69. [TowerTalk] noise flow analysis? (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Fri, 9 Jan 2004 13:19:10 -0000; Somebody help me out here. I've worked with obscure technologies for 30 years or so...what's 'noise flow'? Incidentally, for those who haven't read the original article, google 'infoworld', click on; /archives//html/Towertalk/2004-01/msg00163.html (6,982 bytes)
70. [TowerTalk] FW: BPL (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Fri, 9 Jan 2004 14:07:42 -0000; OK...my last post here on this topic. I googled IDG and found the managing editor. This post is to close the loop, and give you the email addresses. Let's not flame the boss, though, it'll just annoy; /archives//html/Towertalk/2004-01/msg00165.html (11,134 bytes)
71. [TowerTalk] noise flow (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Fri, 9 Jan 2004 19:59:00 -0000; Mr. Robbins shames me again...I shudda googled it! However, as N4ZR points out, of the first 6 references, three are acoustical, one of them in water and two in air. Two are on-chip noise dealing wit; /archives//html/Towertalk/2004-01/msg00192.html (7,723 bytes)
72. [TowerTalk] BPL Rockville (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sat, 10 Jan 2004 19:19:50 -0000; Anybody on here from Rockville, who can comment on noise from BPL? N2EA (who promised he'd sent his last on this thread... and now I have...to be continued at RFI@contesting.com) Responses privately,; /archives//html/Towertalk/2004-01/msg00220.html (6,724 bytes)
73. [TowerTalk] NO MORE BPL HERE! (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sun, 11 Jan 2004 18:37:57 -0000; Go subscribe to rfi@contesting.com, and let's continue the discussion there. (thank you W0UN for the reminder.) N2EA _______________________________________________ See: http://www.mscomputer.com for; /archives//html/Towertalk/2004-01/msg00229.html (7,021 bytes)
74. [TowerTalk] decoupling feedlines (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sun, 11 Jan 2004 18:38:01 -0000; The potential for common mode currents on feedlines, whether they be phased verticals or stacked yagis, or simply antennas within a few wavelengths of each other which attach to a common switch....is; /archives//html/Towertalk/2004-01/msg00230.html (7,280 bytes)
75. [TowerTalk] pucker factor; installing masts in towers (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Wed, 21 Jan 2004 16:09:51 -0000; Following k4OJ's comments about this, for anyone who hasn't contemplated the installation problems: The largest mast you can install in a tower, once the tower is assembled, is limited by your gin po; /archives//html/Towertalk/2004-01/msg00344.html (8,675 bytes)
76. [TowerTalk] square towers (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sun, 25 Jan 2004 17:01:37 -0000; I'm no engineer, but it would seem to me that a 4 legged tower would have 33% more material than a 3 legged tower. I would also think that the diagonal bracing seen on Rohn, for example, provides gre; /archives//html/Towertalk/2004-01/msg00440.html (8,146 bytes)
77. [TowerTalk] steppIR on the ice (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Mon, 26 Jan 2004 18:29:38 -0000; Just to reiterate my own positive experience with my 3 el SteppIR through a VT winter... I burned out the base rotor on the 70' tower, and relied on the 180 degree flip mode, between US and EU. The o; /archives//html/Towertalk/2004-01/msg00470.html (7,518 bytes)
78. [TowerTalk] risky business (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sun, 1 Feb 2004 19:05:01 -0000; Back in my broadcast days, I regularly climbed 190' sticks to change out lightbulbs. It was work, but they were solid as rocks. The scariest moment? Helping K2BMI put up 100' of rohn 25. We'd get 3 s; /archives//html/Towertalk/2004-02/msg00009.html (8,229 bytes)
79. [TowerTalk] Radials, elevated, or otherwise (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Fri, 13 Feb 2004 19:45:58 -0000; Folks, I'm going to disagree with Jim, on two points. 1) Early work done by consulting engineers, using elevated radials (10'), in place of 120 buried radials indicated that field strength at 1 mile; /archives//html/Towertalk/2004-02/msg00212.html (8,521 bytes)
80. [TowerTalk] vertical dipole (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Sat, 14 Feb 2004 17:35:09 -0000; Hi Tim, You got it exactly! A vertical dipole avoids the IR losses in the ground, but not the absorption and brewster angle effects at first reflection. They're outside your control, anyway. If the r; /archives//html/Towertalk/2004-02/msg00220.html (7,640 bytes)

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