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21. [TowerTalk] elevated guys (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Mon, 09 Jan 2006 19:06:07 -0500; Alton, 1) listen to the guys who suggest you do NOT 'backyard engineer' your idea of using pipe to elevate the guys. Use a pro. 2 A number of members of the Frankford Radio Club have used elevated gu; /archives//html/Towertalk/2006-01/msg00204.html (6,864 bytes)
22. [TowerTalk] cleaning steppIR elements? (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Tue, 10 Jan 2006 18:47:50 -0500; TT: If you simply store the elements retracted, they're self-cleaning. No need to fix something that isn't broken. Simply run 'em in and out regularly. Like any moveable mechanical structure, if you; /archives//html/Towertalk/2006-01/msg00228.html (6,741 bytes)
23. [TowerTalk] swr shifts with power (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Tue, 24 Jan 2006 08:29:26 -0500; Borrow an antenna tuner, and use it to bypass your network, to see if you still see the shift. That will at least point you in the right direction. n2ea@arrl.net jimjarvis@ieee.org __________________; /archives//html/Towertalk/2006-01/msg00458.html (7,863 bytes)
24. [TowerTalk] unguyed tower specs (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Tue, 24 Jan 2006 17:49:10 -0500; TT: I THINK I answered this, both personally and for posting, but haven't seen my msg. Vide infra for context, and subsequent comments: IF I recall correctly, 25g is rated for 2 sq. ft. 30' above a h; /archives//html/Towertalk/2006-01/msg00487.html (7,569 bytes)
25. [TowerTalk] tower base grounding (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sun, 29 Jan 2006 17:47:47 +0000; Dick, (TT): You raise several questions: "The (inspector's) note said all rebar must be bonded to the ground grid, and inspection will be required prior to backfill. " I think an argument can be made; /archives//html/Towertalk/2006-01/msg00577.html (8,860 bytes)
26. [TowerTalk] dacron rope treatment (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sat, 04 Feb 2006 18:38:24 +0000; N1OZ raised the question of how to treat his 3/8" dacron-braided guys on a 45' mast. First, this shouldn't be a big deal. You won't be putting that much tension on the guys on a simple mast. Probably; /archives//html/Towertalk/2006-02/msg00049.html (7,270 bytes)
27. [TowerTalk] steppIR topload (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sun, 05 Feb 2006 18:06:03 +0000; I've been contemplating using a 3 el steppIR as top loading on a 50' tower, to get on 80 & 160. The recent thread on this topic suggests that there have been no observed problems with control wiring.; /archives//html/Towertalk/2006-02/msg00069.html (6,927 bytes)
28. [TowerTalk] blocking a crankup (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Fri, 10 Feb 2006 23:02:32 +0000; Doesn't matter a whole lot what you use to block the sections... BUT MAKE DAMNED SURE YOU BLOCK ...AAAALLLLLLLL..... THE SECTIONS! 2x4's are sufficient for smaller towers, up to 50-60', but do not fa; /archives//html/Towertalk/2006-02/msg00136.html (7,944 bytes)
29. [TowerTalk] Rohn foldover winch (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Thu, 16 Feb 2006 13:45:36 +0000; My 45G foldover used a Dutton Lainson DL2500, which had a positive locking clutch. You had to CRANK it down, for it to come down. No free wheeling. If what you have does NOT have such a clutch, you h; /archives//html/Towertalk/2006-02/msg00201.html (6,938 bytes)
30. [TowerTalk] motorizing the handwinch on an marb550 (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Wed, 22 Feb 2006 10:42:43 +0000; I am thinking about motorizing the hand winch on this tower. In other words, just putting a belt or chain drive. Seems like this ought to be a lot cheaper than putting a motorwinch on it. The hand wi; /archives//html/Towertalk/2006-02/msg00313.html (7,402 bytes)
31. [TowerTalk] 160M ocf dipole (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sun, 26 Feb 2006 23:26:01 +0000; Jon, W4ZW.... The OCF dipole you describe is not a lot different than what RadioWorks sells as a "carolina windom". I had two 160m versions up in Vermont, and am on my second 80m version since moving; /archives//html/Towertalk/2006-02/msg00381.html (7,647 bytes)
32. [TowerTalk] hdx won't cut it (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sun, 12 Mar 2006 16:43:09 +0000; The riveted series of Rohn towers have a 10' limit on boom length. The reason is torque damage to the rivets. I'd suggest 45g or 55g, either of which will self-support at 20' with a reasonable founda; /archives//html/Towertalk/2006-03/msg00212.html (6,744 bytes)
33. [TowerTalk] hdbx rating (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Mon, 13 Mar 2006 05:34:41 +0000; there are two issues here. (and some side comments) 1) Will HBX support the array? 2) Do you have to convince local zoning officials that it will support the array? If the former...the answer is yes,; /archives//html/Towertalk/2006-03/msg00240.html (7,719 bytes)
34. [TowerTalk] HDBX rating (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Mon, 13 Mar 2006 23:22:33 +0000; Folks...annecdotal evidence goes both ways here... and none of it matters a hoot, if you're dealing with code approval. Specs are specs. THAT said, I like the simplicity of the HBDX series, and would; /archives//html/Towertalk/2006-03/msg00267.html (7,539 bytes)
35. [TowerTalk] stacked kt34xa's (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Thu, 23 Mar 2006 00:21:42 +0000; Brad, Eric Scace, K3NA, presented a paper at Dayton on a stack of XA's. It was probably around 1992 or so. It's worth digging up, or contacting him directly for info. I would not be surprised to see; /archives//html/Towertalk/2006-03/msg00451.html (7,111 bytes)
36. [TowerTalk] homeowners insurance (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Fri, 24 Mar 2006 13:06:35 +0000; Although insurance companies are in business to make money, they've gone through a distinct change in the last few years. In part, this is due to another profit-seeking enterprise, called CLUE... Com; /archives//html/Towertalk/2006-03/msg00487.html (8,988 bytes)
37. [TowerTalk] phased triangular arrays (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Thu, 06 Apr 2006 15:34:24 +0000; I've used 3 element 90 degree spaced vertical arrays in the past, driving 2 out of 3, running matched, equal length feedlines to each vertical, and using one 90 degree phasing line. Worked fine, and; /archives//html/Towertalk/2006-04/msg00137.html (7,659 bytes)
38. [TowerTalk] ab577 specs (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sat, 15 Apr 2006 19:11:17 +0000; First, some negotiation is in order, and a bit of research. I suggest you contact Ben, at Ontario Surplus, and see if you can procure a copy of the manual from him. (google works). I have purchased 2; /archives//html/Towertalk/2006-04/msg00257.html (7,738 bytes)
39. [TowerTalk] AB-577/GRC Engineering Specs? (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Sun, 16 Apr 2006 12:47:54 +0000; The ab577 is intended as a temporary structure. I doubt that you can readily demonstrate that it will survive 90mph gusts, using screw-in guy anchors, without including soil analysis. Although I am a; /archives//html/Towertalk/2006-04/msg00274.html (8,036 bytes)
40. [TowerTalk] ab577 engineering specs (score: 1): Author: "Jim Jarvis" <jimjarvis@verizon.net>; Date: Mon, 17 Apr 2006 03:15:45 +0000; TT, Michael: Kudos to Lux and Hachadorian for the DOD documents lookup sites. I was able to find the specs for my ab621 through them. The military load specs for the 577, plus some simple math may be; /archives//html/Towertalk/2006-04/msg00296.html (7,267 bytes)

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