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21. Re: [TowerTalk] Radial question (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 29 Feb 2016 13:50:53 -0800; It would indeed. Yes, their signal was VERY weak when you could hear it at all. What were they using for an antenna? 73, Jim K9YC _______________________________________________ _____________________; /archives//html/Towertalk/2016-02/msg00344.html (8,924 bytes)
22. Re: [TowerTalk] Radial question (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 29 Feb 2016 13:56:13 -0800; There is much to be learned by a study of N6LF's excellent work on radials. It's a combination of modeling and careful measurement of real antennas. I've done talks at Pacificon and for various ham c; /archives//html/Towertalk/2016-02/msg00345.html (9,642 bytes)
23. Re: [TowerTalk] Radial question (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Mon, 29 Feb 2016 14:29:46 -0800; Yes all this is true but do not forget the actual radial length will be shorter than 0.4 Wavelength when on the ground. It may be electrically 0.4 wavelength but physically it is considerable shorter; /archives//html/Towertalk/2016-02/msg00346.html (9,435 bytes)
24. Re: [TowerTalk] Radial question (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Mon, 29 Feb 2016 14:33:26 -0800; This is from the ARRL antenna book: -- Practical Suggestions For Vertical Ground Systems At least 16 radials should be used if at all possible. Experimental measurements and calculations show that w; /archives//html/Towertalk/2016-02/msg00347.html (10,389 bytes)
25. Re: [TowerTalk] Radial question (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Mon, 29 Feb 2016 15:01:48 -0800; So, if you had a 5-10 meter tall radiator, being used on 80m or 160m, there's not a lot to be gained by going longer than 15-20 meters for the radials. This often heard concept makes intuitive sense.; /archives//html/Towertalk/2016-02/msg00348.html (10,039 bytes)
26. Re: [TowerTalk] Radial question (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Mon, 29 Feb 2016 15:43:39 -0800; So, if you had a 5-10 meter tall radiator, being used on 80m or 160m, there's not a lot to be gained by going longer than 15-20 meters for the radials. This often heard concept makes intuitive sense.; /archives//html/Towertalk/2016-02/msg00350.html (11,764 bytes)
27. [TowerTalk] Radial question (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Mon, 29 Feb 2016 18:28:06 -0800; Larry,OMs and YLs, Your point is correct some of the antenna books are very vague on this point but I have seen it reinforced on the Top Band Reflector. Generally Qty 120 one hundred ten foot radials; /archives//html/Towertalk/2016-02/msg00352.html (11,183 bytes)
28. Re: [TowerTalk] Radial question (score: 1): Author: "Doug Turnbull" <turnbull@net1.ie>; Date: Tue, 01 Mar 2016 05:18:48 -0500; Rick, What you are saying is correct a short vertical requires a lower ground resistance for optimal performance and thus a more extensive number of long radials. Otherwise there is further compromis; /archives//html/Towertalk/2016-03/msg00001.html (10,486 bytes)
29. Re: [TowerTalk] Radial question (score: 1): Author: "Doug Turnbull" <turnbull@net1.ie>; Date: Tue, 01 Mar 2016 05:26:01 -0500; Jim, Thank you, I may add some longer radials. There certainly is much confusion and conflicting information abounding when it comes to radials. In some cases this may be due to inadequate care taken; /archives//html/Towertalk/2016-03/msg00002.html (10,641 bytes)
30. [TowerTalk] Radial question (score: 1): Author: "Jon Suehiro" <nn5t@attglobal.net>; Date: Thu, 03 Mar 2016 08:28:10 -0500; A bit off the topic, but - I don't think have seen any discussion in the subject -- ground radials. I have Butternut HF2V (with 160/30 options) and placed approx 12 x 15' ground screen around the ver; /archives//html/Towertalk/2016-03/msg00033.html (7,508 bytes)
31. Re: [TowerTalk] Radial question (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 3 Mar 2016 09:27:44 -0800; There has been a lot. This email reflector can be searched. Here's a tutorial that focuses on 160M. http://k9yc.com/160MPacificon.pdf 73, Jim K9YC _______________________________________________ ____; /archives//html/Towertalk/2016-03/msg00036.html (7,562 bytes)
32. Re: [TowerTalk] Radial question (score: 1): Author: Kelly Taylor <ve4xt@mymts.net>; Date: Thu, 3 Mar 2016 11:56:14 -0600; Hi Jim, Further to your tutorial, particularly the reference to inductance at a current peak, I note with interest a reference I remember from the manual for my old HF6V (the OPs antenna is the HF2V,; /archives//html/Towertalk/2016-03/msg00040.html (9,541 bytes)
33. Re: [TowerTalk] Radial question (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 3 Mar 2016 15:46:34 -0800; Further to your tutorial, particularly the reference to inductance at a current peak, I note with interest a reference I remember from the manual for my old HF6V (the OPs antenna is the HF2V, IIRC):; /archives//html/Towertalk/2016-03/msg00046.html (9,464 bytes)
34. Re: [TowerTalk] Radial question (score: 1): Author: "jcjacobsen@q.com" <jcjacobsen@q.com>; Date: Thu, 3 Mar 2016 19:13:00 -0500 (EST); A question was posted regarding base loading coil on TBR-160: <snip> I note with interest a reference I remember from the manual for my old HF6V (the OPs antenna is the HF2V, IIRC): in it, Butternut; /archives//html/Towertalk/2016-03/msg00047.html (8,122 bytes)
35. Re: [TowerTalk] Radial question (score: 1): Author: "Jon Suehiro" <nn5t@attglobal.net>; Date: Sat, 05 Mar 2016 09:35:14 -0500; Thanks for many inputs. During the contest, I am running 100Watts. In my area, most homes are subscribing AT&T U-verse. Initially I was resetting my U-verse modem when TX on low bands even with 50Wat; /archives//html/Towertalk/2016-03/msg00060.html (8,605 bytes)
36. Re: [TowerTalk] Radial question (score: 1): Author: "Jon Suehiro" <nn5t@attglobal.net>; Date: Sat, 05 Mar 2016 09:35:34 -0500; http://k9yc.com/160MPacificon.pdf Great tutorial, Jim. May I ask for additional comment to On-Ground Radial Guidelines - Don't use radials longer than the vertical height of your antenna I was going; /archives//html/Towertalk/2016-03/msg00064.html (7,388 bytes)
37. Re: [TowerTalk] Radial question (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 5 Mar 2016 09:38:46 -0800; That advice comes from N6LF, but it is sort of reinforced by the much earlier table of radial lengths from the ARRL Antenna Book. Loss in radials is greatest where current is greatest, and that's nea; /archives//html/Towertalk/2016-03/msg00066.html (8,459 bytes)

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