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Total 87 documents matching your query.

41. [TowerTalk] New EZNEC updates available for both v. 6.0 and v. 5.0 (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Fri, 29 May 2020 03:00:50 -0700
For EZNEC v. 6.0 users, maintenance update v. 6.0.26 is now available. See http://eznec.com/Updates60.html and http://eznec.com/ez60updates/index.html == For EZNEC v. 5.0 users, maintenance update v.
/archives//html/Towertalk/2020-05/msg00207.html (7,218 bytes)

42. Re: [TowerTalk] NVIS (not exactly towers, but HF) (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Tue, 9 Jun 2020 20:23:10 -0700
Like this: https://forums.qrz.com/index.php?attachments/upload_2020-6-8_6-33-57-png.670446/ https://forums.qrz.com/index.php?threads/single-ground-radial-wire-placed-beneath-a-dipole-how-effective-is
/archives//html/Towertalk/2020-06/msg00051.html (8,864 bytes)

43. Re: [TowerTalk] NVIS (not exactly towers, but HF) (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Wed, 10 Jun 2020 18:44:02 -0700
See https://i.imgur.com/aXqmRJm.png As Jim Lux mentioned there is a slight difference in the calculated feedpoint impedance at resonance (jX=0) but the Gain (dBi) values are almost identical. Also se
/archives//html/Towertalk/2020-06/msg00061.html (8,924 bytes)

44. Re: [TowerTalk] Do I need an insulator on the ends of my dipole? (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Sat, 27 Jun 2020 14:30:42 -0700
A few years ago I did a little EZNEC study on that. Details here (Reply #16): https://forums.qrz.com/index.php?threads/touching-the-antenna-during-transmission.556342/page-2#post-4157410 Dan, AC6LA _
/archives//html/Towertalk/2020-06/msg00217.html (9,118 bytes)

45. Re: [TowerTalk] Fwd: RE: NEC 5 upgrade (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Mon, 10 Aug 2020 15:27:49 -0700
The NEC-5 release does not include source code, at least not yet. Not sure if that might change in the future. The download package (zip file) includes Windows executable files. The zip also has a se
/archives//html/Towertalk/2020-08/msg00072.html (7,765 bytes)

46. Re: [TowerTalk] Fwd: RE: NEC 5 upgrade (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Mon, 10 Aug 2020 21:54:31 -0700
See https://eznec.com/nec-5.htm Dan, AC6LA _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://list
/archives//html/Towertalk/2020-08/msg00075.html (7,172 bytes)

47. Re: [TowerTalk] Fwd: RE: NEC 5 upgrade (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Tue, 11 Aug 2020 17:04:36 -0700
If you've purchased a NEC-5 license and downloaded the NEC-5 package prior to today you might want to do the download again. The missing "NEC5GI Users Manual.pdf" manual for the "Graphical Interface"
/archives//html/Towertalk/2020-08/msg00080.html (8,137 bytes)

48. [TowerTalk] Using NEC-5 output data with other display programs (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Mon, 17 Aug 2020 21:01:38 -0700
See: https://forums.qrz.com/index.php?threads/using-nec-5-output-data-with-other-display-programs.720532/ Dan, AC6LA _______________________________________________ __________________________________
/archives//html/Towertalk/2020-08/msg00114.html (6,816 bytes)

49. Re: [TowerTalk] Coaxial Stubs target frequencies for CQWW SSB (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Thu, 1 Oct 2020 23:09:57 -0700
For a detailed modeling look at that see "Stubs for Harmonic Suppression" here: https://ac6la.com/aetltu.html#Part6 Dan, AC6LA _______________________________________________ ________________________
/archives//html/Towertalk/2020-10/msg00010.html (7,606 bytes)

50. Re: [TowerTalk] Working with HFTASweep data (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Sat, 3 Oct 2020 14:59:28 -0700
As an alternative to DIY Excel plotting, and if you are willing to download and install the ITS HF Propagation package ( http://greg-hand.com/hfwin32.html ), that package has a utility program called
/archives//html/Towertalk/2020-10/msg00014.html (7,598 bytes)

51. Re: [TowerTalk] Greyline Performance comments on QRZ (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Mon, 19 Oct 2020 13:33:46 -0700
Here's another QRZ thread on the same subject: https://forums.qrz.com/index.php?threads/greyline-performance-antennas-apalling-service-and-customer-support.666291/ That thread is now up to 18 pages.
/archives//html/Towertalk/2020-10/msg00170.html (8,354 bytes)

52. [TowerTalk] Modeling an OCF flagpole vertical (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Wed, 21 Oct 2020 03:11:07 -0700
For those who enjoy modeling here's a little study that was done several years ago: https://forums.qrz.com/index.php?threads/modeling-the-new-force-12-ocf-vertical-dipole-with-tuners.536789/ AutoEZ a
/archives//html/Towertalk/2020-10/msg00198.html (6,924 bytes)

53. [TowerTalk] Seeing the Effects of Local Terrain on Radiation Patterns (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Fri, 6 Nov 2020 02:48:14 -0800
Details along with several illustrations here: https://forums.qrz.com/index.php?threads/seeing-the-effects-of-local-terrain-on-radiation-patterns.733041/ Many thanks to TowerTalkers AC0C and N7WS for
/archives//html/Towertalk/2020-11/msg00063.html (6,986 bytes)

54. Re: [TowerTalk] Vertical placement? (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Thu, 12 Nov 2020 11:51:20 -0800
Here's an additional study based partly on Jim's work: https://ac6la.com/aecollection5.html#19 Dan, AC6LA _______________________________________________ _____________________________________________
/archives//html/Towertalk/2020-11/msg00134.html (7,746 bytes)

55. Re: [TowerTalk] Understanding Coax Loss Measurements (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Sat, 28 Nov 2020 22:19:01 -0800
KN5L has made some nice measurements of window line using the technique shown here: https://www.kn5l.net/wm553/DXE-LL300/ For the results of using KN5L's OC/SC sweep files to calculate matched line l
/archives//html/Towertalk/2020-11/msg00274.html (8,797 bytes)

56. [TowerTalk] If you can't erect a tall tower ... (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Tue, 15 Dec 2020 12:24:01 -0800
... how about a short tower on a tall hill? Full details here: https://forums.qrz.com/index.php?threads/seeing-the-effects-of-local-terrain-on-radiation-patterns.733041/page-2#post-5698811 If that li
/archives//html/Towertalk/2020-12/msg00048.html (6,939 bytes)

57. Re: [TowerTalk] If you can't erect a tall tower ... (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Tue, 15 Dec 2020 17:51:00 -0800
Thanks for the NCJ link, Jim. And speaking of K6OIK, he recently did a review of HOBBIES for QEX: https://www.fars.k6ya.org/docs/Stearns_K6OIK,_HOBBIES_Software_for_Computational_Electromagnetics,_QE
/archives//html/Towertalk/2020-12/msg00050.html (7,307 bytes)

58. Re: [TowerTalk] Understanding Coax Loss Measurements (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Fri, 18 Dec 2020 12:35:52 -0800
Oops. Here's the entire post, unabridged this time. KN5L has made some nice measurements of window line using the technique shown here: https://www.kn5l.net/wm553/DXE-LL300/ For the results of using
/archives//html/Towertalk/2020-12/msg00062.html (7,557 bytes)

59. [TowerTalk] Modeling the OH1TV "Opposite Voltage" Feed System for Phased Arrays (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Sun, 3 Jan 2021 21:37:50 -0800
Detailed discussion and lots of illustrations here: https://forums.qrz.com/index.php?threads/modeling-the-oh1tv-opposite-voltage-feed-system-for-phased-arrays.742602/ Dan, AC6LA _____________________
/archives//html/Towertalk/2021-01/msg00055.html (7,008 bytes)

60. Re: [TowerTalk] Modeling the OH1TV "Opposite Voltage" Feed System for Phased Arrays (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Mon, 4 Jan 2021 15:20:53 -0800
Yeah, I kinda glossed over that. The model does not "calculate" the mutual impedances directly but the mutual coupling is taken into account. The model is first configured with two separate "current"
/archives//html/Towertalk/2021-01/msg00062.html (9,394 bytes)


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