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1. [Towertalk] VEE Beam (Summary) Thanks (score: 1): Author: Jim@shawresources.com (Jim Shaw); Date: Wed, 4 Dec 2002 09:34:38 -0800; Not sure what type you are interested in but the ARRL's Wire Antenna Classics Vol 2 has some wire antennas that may of interest Extended Double Zepp (1 element) Extended Double Zepp (2 element) Lazy; /archives//html/Towertalk/2002-12/msg00169.html (9,040 bytes)
2. [Towertalk] Antenna Advice (score: 1): Author: Jim@shawresources.com (Jim Shaw); Date: Sat, 21 Dec 2002 12:59:11 -0800; I know that some people may react to this suggestion in a very emotional way, but if it were me, I'd post your question to the following reflector as well http://groups.yahoo.com/group/SteppIR/ What; /archives//html/Towertalk/2002-12/msg00627.html (10,408 bytes)
3. [Towertalk] LPDAs... (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Thu, 14 Nov 2002 08:51:38 -0800; QUESTION: Instead of an LPDA, why not use a 3 element SteppIR antenna? Don't they cover all frequencies continuously from 13.9 to 30 MHz? Isn't that similar to the design goal of an LPDA? Seems like; /archives//html/Towertalk/2002-11/msg00298.html (9,729 bytes)
4. [Towertalk] R7, traps with traps. (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Fri, 15 Nov 2002 17:39:22 -0800; Might want to check with this resource: http://www.iol.ie/~bravo/r7_vertical.htm 73 de Jim WA6PX JGShaw@Alumni.HAAS.org I have a Cushcraft R7 that I started to play around with yesterday. It's been t; /archives//html/Towertalk/2002-11/msg00360.html (8,801 bytes)
5. [Towertalk] EZNEC 3 Files (score: 1): Author: Jim@shawresources.com (Jim Shaw); Date: Sun, 24 Nov 2002 12:31:57 -0800; Here are some EZNEC files http://www.antennex.com/Sshack/model.htm 73 de Jim WA6PX JGShaw@Alumni.HAAS.org I just picked up a copy of EZNEC 3 in preparation for the ARRL modeling course. Is there a re; /archives//html/Towertalk/2002-11/msg00657.html (7,974 bytes)
6. [Towertalk] Power ground rod driver (score: 1): Author: Jim@shawresources.com (Jim Shaw); Date: Thu, 28 Nov 2002 09:51:14 -0800; Chuck Although I have it somewhere, I can't find the 'official reference' to the following idea. But I seem to recall the following alternative approach is an option for situations where a vertical g; /archives//html/Towertalk/2002-11/msg00780.html (10,841 bytes)
7. [Towertalk] GAO Challenger DX (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Sun, 6 Oct 2002 19:40:56 -0700; Hmmm, wonder if that is true for a vertical 'dipole'? Always thought at some heights, the vertical 'dipole' might have an edge. Likewise, at some heights, seem to recall that an inverted vee (30 deg; /archives//html/Towertalk/2002-10/msg00202.html (10,249 bytes)
8. [Towertalk] GAO Challenger DX (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Mon, 7 Oct 2002 10:08:14 -0700; In general, I agree that the big variable at low heights (less than 1/2 WL) is the ground. Always thought low HF horizontal dipoles are DX problematic, particularly on the low bands. Its not clear to; /archives//html/Towertalk/2002-10/msg00221.html (10,935 bytes)
9. [Towertalk] GAO Challenger DX (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Mon, 7 Oct 2002 12:51:48 -0700; Steve OK, but here's one more wrinkle to consider. The SteppIR single 33 ft high self supporting radiating element has minimal wind resistance and can be roof mounted (or chimney?). So, ground radial; /archives//html/Towertalk/2002-10/msg00230.html (18,835 bytes)
10. [Towertalk] GAO Challenger DX (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Mon, 7 Oct 2002 13:38:15 -0700; Nice backup antenna! I had a 5BTV installed in a similar fashion 25 years ago. Seemed just fine to me. Never had any trouble with the traps (but was only running 100 watts). Great antenna. 73 de Jim; /archives//html/Towertalk/2002-10/msg00235.html (22,165 bytes)
11. [Towertalk] choices (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Tue, 8 Oct 2002 21:59:43 -0700; Why not call w9INN and get one of his custom made wire antennas? Have heard positive things but never owned one myself. 73 de Jim WA6PX JGShaw@Alumni.HAAS.org an I agree. I had one up and dumped it f; /archives//html/Towertalk/2002-10/msg00287.html (8,224 bytes)
12. [Towertalk] RF feedback through other feeders (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Mon, 2 Sep 2002 14:37:09 -0700; Have you considered feed line issues? What kind of feed lines do you use? Coax? Ladder line? etc. What kind of baluns or ununs or other such devices do you use and how/where are they connected? What; /archives//html/Towertalk/2002-09/msg00078.html (8,780 bytes)
13. [Towertalk] Need Source for Fiberglass Mast (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Thu, 5 Sep 2002 18:53:40 -0700; Ed Check out the MAX-GAIN SYSTEMS Quad Spreader Poles at http://www.mgs4u.com/quadsp.htm 73 de Jim WA6PXU@ARRL.net I plan to erect a dedicated VHF/UHF antenna tower. I would like to use a fiberglass; /archives//html/Towertalk/2002-09/msg00205.html (8,056 bytes)
14. [Towertalk] Ref: Fiberglass Mast (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Fri, 6 Sep 2002 07:33:20 -0700; Actually, Max Gain does sell a single 16 ft len of 1?" OD tube, 1/8" wall for use in the 40M Quad. spreader (Type 6). Why not call them and ask the question. They just might be able to come up with w; /archives//html/Towertalk/2002-09/msg00219.html (8,509 bytes)
15. [Towertalk] Need Antenna Advice! (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Sat, 14 Sep 2002 13:23:46 -0700; Re StepIR antennas: Many good points made in this thread about F/B and gain but it seems to me a couple of additional points still need to be made. In 42 years of hamming, I've never owned a beam (or; /archives//html/Towertalk/2002-09/msg00496.html (12,606 bytes)
16. [Towertalk] Cushcraft R5 , Problem ??? (score: 1): Author: Jim@shawresources.com (Jim Shaw); Date: Mon, 16 Sep 2002 21:59:14 -0700; Robert The problem you describe makes me wonder if your coax and/or traps might be the issue. Maybe breaking down under transmit power? Or some other connection might be malfunctioning under transmit; /archives//html/Towertalk/2002-09/msg00567.html (9,743 bytes)
17. [Towertalk] Insulated masting material (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Sat, 3 Aug 2002 21:16:32 -0700; Larry One place I would look is here http://www.fairradio.com/ They have lots of surplus. Not sure if they have what you want. 73 de Jim WA6PXU@ARRL.net Does anyone know a source for the old military; /archives//html/Towertalk/2002-08/msg00072.html (7,844 bytes)
18. [Towertalk] AB-577/GRC Surplus Mast (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Tue, 20 Aug 2002 10:28:54 -0700; try this URL http://home.att.net/~surplusben/prod01.htm 73 de Jim WA6PXU@ARRL.net Surplus sales of canada does don't know the web address they always have them at dayton N9IWW -- Kevin Adam 1239 W. T; /archives//html/Towertalk/2002-08/msg00577.html (8,833 bytes)
19. [Towertalk] Attaching Ladder line to a Metal Rod/Mast (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Wed, 21 Aug 2002 08:52:14 -0700; Am very interested in any tips or techniques anyone can suggest for attaching ladder line to metal rod/mast. I am putting up a wire of equal length (45 or 50 ft) on either side of an existing 35 ft m; /archives//html/Towertalk/2002-08/msg00602.html (8,080 bytes)
20. [Towertalk] New Web Page (score: 1): Author: Jim@ShawResources.com (Jim Shaw); Date: Mon, 22 Jul 2002 10:16:52 -0700; John Found your web site very helpful. Timely as well. Thanks. 73 de Jim WA6PXU@ARRL.net I have added a new page to my website at http://www.iol.ie/~bravo/ on the subject of my Low Band TX and RX Ant; /archives//html/Towertalk/2002-07/msg00574.html (8,041 bytes)

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