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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+add\s+a\s+3rd\s+el\s+to\s+40\-2cd\s*$/: 28 ]

Total 28 documents matching your query.

21. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 13 Mar 2018 15:40:30 -0400; Jim is correct here ... 72' is a half wave on 40 meters. Stacking a second antenna at half that height would put the lower antenna at *one* *quarter wave* above ground. The lower antenna would have i; /archives//html/Towertalk/2018-03/msg00083.html (10,759 bytes)
22. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Tue, 13 Mar 2018 16:14:39 -0400; I meant to type 1/4 WL. With 1/2 WL spacing it would work well John KK9A Two shorty 40's can work amazingly well together however I also disagree with Steve only because of the 1/8 WL stacking distan; /archives//html/Towertalk/2018-03/msg00085.html (9,859 bytes)
23. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Tue, 13 Mar 2018 14:48:05 -0700; One caveat for "terrain analysis" is that HFTA does not model stacks well around 1/4 wl and less separations. So that leaves NEC/EZNEC which does give accurate results but over flat terrain. It will; /archives//html/Towertalk/2018-03/msg00086.html (11,905 bytes)
24. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: "Bob Shohet, KQ2M" <kq2m@kq2m.com>; Date: Tue, 13 Mar 2018 18:03:46 -0400; I was fortunate to be using K6STIs YO and TA programs to model my antennas over my incredibly complex terrain. I found no equal program when it came to the combination of modeling antenna stacks over; /archives//html/Towertalk/2018-03/msg00087.html (13,932 bytes)
25. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: <john@kk9a.com>; Date: Tue, 13 Mar 2018 20:19:52 -0400; I never used TA and I was not aware that it worked modeled stacks. That is fantastic. I would love to see a program that could model verticals over terrain. I used YO and AO a lot, Brian did an amazi; /archives//html/Towertalk/2018-03/msg00088.html (9,918 bytes)
26. [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Tue, 13 Mar 2018 20:44:36 -0700; ? ? ? ? One of my all time favorite ideas. Stacked would give you similar performance to a full sized 3L plus you get angle and directional diversity. And you don't need expensive rotators! Like my o; /archives//html/Towertalk/2018-03/msg00095.html (10,865 bytes)
27. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Wed, 14 Mar 2018 07:25:16 -0400; The low-Q loading coils probably contribute to the 250KHz SWR bandwidth that K7LXC posted. John http://www.qsl.net/ve6wz/intro.htm scroll down til u see the info on the XM-240. http://www.qsl.net/ve6; /archives//html/Towertalk/2018-03/msg00096.html (8,929 bytes)
28. Re: [TowerTalk] add a 3rd el to 40-2cd (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Wed, 14 Mar 2018 09:41:06 -0400; Of course I was being facetious calling them low-Q but forgot the smiley. That is incredible SWR bandwidth for a shorty 40. John John http://www.qsl.net/ve6wz/intro.htm scroll down til u see the info; /archives//html/Towertalk/2018-03/msg00097.html (9,216 bytes)

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