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1. [TowerTalk] Broadside Parasitic Element (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Tue, 5 Dec 2017 06:50:02 -0800; http://ham-radio.com/k6sti/broad.htm The writeup describes a simple upgrade for an FM broadcast receiving antenna, but the idea may have application at HF. For example, if you hang a quarter-wave wir; /archives//html/Towertalk/2017-12/msg00046.html (9,021 bytes)
2. [TowerTalk] Yagi Stacking Study (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 19 Apr 2018 16:14:43 -0700; http://ham-radio.com/k6sti/duo.htm Perhaps the results can be extrapolated to other 15m and 20m Yagis, at least in a general way, but not to other bands with a different frequency ratio. Note the pat; /archives//html/Towertalk/2018-04/msg00200.html (6,683 bytes)
3. [TowerTalk] Enhanced OWA (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 19 Apr 2018 18:14:52 -0700; Let me try this message again as it failed to appear the first time I sent it a few hours ago. Thanks to John, KK9A, who explained how I could subscribe without receiving emails, as well as posting t; /archives//html/Towertalk/2018-04/msg00201.html (8,120 bytes)
4. Re: [TowerTalk] Enhanced OWA (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 19 Apr 2018 18:39:54 -0700; Would you be willing to provide the coding for a file that will work with YO? Bob, YO can only model Yagis with straight elements. In addition, older versions cannot model an OWA because DE and D1 ar; /archives//html/Towertalk/2018-04/msg00203.html (8,216 bytes)
5. [TowerTalk] Narrowband OWA (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Fri, 20 Apr 2018 06:00:19 -0700; I have updated my OWA writeup with an example with a narrowband pattern. Bending the driven element offers much less benefit for such designs, which I believe may be common. http://ham-radio.com/k6st; /archives//html/Towertalk/2018-04/msg00207.html (6,495 bytes)
6. [TowerTalk] Enhanced OWA (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 19 Apr 2018 12:11:35 -0700; Let me try this again. Thanks to John, KK9A, who told me how I could subscribe without receiving emails. http://ham-radio.com/k6sti/owa.htm I thought anyone interested in constructing an OWA might fi; /archives//html/Towertalk/2018-04/msg00209.html (8,709 bytes)
7. Re: [TowerTalk] Enhanced OWA (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Fri, 20 Apr 2018 08:59:14 -0700; Is anywhere the information how the bent driver works? I don't know how it works, Maximo. I have been using bent elements to design antennas for the 88-108 FM broadcast band for about ten years. Bent; /archives//html/Towertalk/2018-04/msg00213.html (9,938 bytes)
8. [TowerTalk] Enhanced OWA (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Mon, 23 Apr 2018 07:48:48 -0700; Just a note that I've updated my OWA writeup with curves for a 3-element Yagi with bent driven element and hairpin match. This design has a good pattern on the low end of the band and relaxes it high; /archives//html/Towertalk/2018-04/msg00236.html (10,310 bytes)
9. [TowerTalk] Busting a Pileup (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Wed, 29 Aug 2018 09:27:55 -0700; http://ham-radio.com/k6sti/pileup.htm _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.cont; /archives//html/Towertalk/2018-08/msg00283.html (6,424 bytes)
10. [TowerTalk] COIL 3.0 (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Tue, 20 Nov 2018 04:50:12 -0800; New! Improved! Yes, an update of my 1990s coil inductance and Q calculator is here. This version uses methods with better accuracy. Although it runs in Windows, the program retains its DOS look and f; /archives//html/Towertalk/2018-11/msg00217.html (6,747 bytes)
11. [TowerTalk] COIL 3.01 (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Wed, 21 Nov 2018 07:03:08 -0800; COIL 3.01 is here: https://www.dropbox.com/s/3bhao7stqmwz9ig/COIL.ZIP I'll be uploading revisions to this URL without further notice. You can check it from time to time to see if anything is new. COI; /archives//html/Towertalk/2018-11/msg00234.html (6,945 bytes)
12. [TowerTalk] COIL 3.22 (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Wed, 26 Dec 2018 16:46:38 -0800; Just a note that I've moved my coil inductance and Q calculator to a new home. You'll find it at the bottom of this page: http://ham-radio.com/k6sti Check the version number in the link. If it's new,; /archives//html/Towertalk/2018-12/msg00257.html (7,349 bytes)
13. [TowerTalk] (no subject) (score: 1): Author: k6sti@att.net; Date: Sun, 17 Mar 2019 08:27:21 -0400 (EDT); " <towertalk@contesting.com> From: Brian Beezley <k6sti@att.net> Subject: Coil Inductance and Q Calculator Date: Sun, 17 Mar 2019 05:27:14 -0700 Importance: normal X-Priority: 3 Content-Type: multipa; /archives//html/Towertalk/2019-03/msg00220.html (13,385 bytes)
14. [TowerTalk] COIL 3.66 (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Wed, 9 Oct 2019 02:39:20 -0700; I've just posted version 3.66 of my coil calculator: http://ham-radio.com/k6sti/coil.zip Some recent changes: Accuracy I recalibrated my HP 4342A Q Meter and remeasured a number of the trickier coils; /archives//html/Towertalk/2019-10/msg00073.html (8,036 bytes)
15. [TowerTalk] COIL 3.85 (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Tue, 18 Feb 2020 17:09:09 -0800; I've posted version 3.85 of my Windows coil calculator: http://ham-radio.com/k6sti/coil.zip See README.TXT to install the program. Some recent changes: Accuracy I've refined the inductor model. Avera; /archives//html/Towertalk/2020-02/msg00107.html (7,838 bytes)
16. [TowerTalk] 40m 4el KLM - replacing linear loading with coils (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Tue, 28 Apr 2020 16:26:23 -0700; I just tried a quick model to see if a single loading coil at the center of a 40m dipole element was feasible. For simplicity I modeled a 46-foot element with constant 0.75" diameter. I compared two; /archives//html/Towertalk/2020-04/msg00215.html (12,480 bytes)
17. Re: [TowerTalk] 40m 4el KLM - replacing linear loading with coils (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Wed, 29 Apr 2020 07:17:03 -0700; The forward gain difference between my single-coil and two-coil models is 0.02 dB. This is with no coil losses, whose difference might easily overwhelm a small directivity difference. But I restored; /archives//html/Towertalk/2020-04/msg00234.html (11,376 bytes)
18. [TowerTalk] COIL 3.96 (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 18 Feb 2021 02:28:04 -0800; The 96th revision of my Windows coil calculator has improved accuracy for self-resonant frequency and proximity effect. Results are much more accurate for short coils. N6LF is using the program to op; /archives//html/Towertalk/2021-02/msg00099.html (7,372 bytes)
19. [TowerTalk] Coil Antennas (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 13 May 2021 10:03:16 -0700; I've added a feature to my coil inductance and Q calculator that can help you evaluate a coil as a multiturn loop antenna. The program calculates reception factor, a figure proportional to the signal; /archives//html/Towertalk/2021-05/msg00037.html (8,857 bytes)
20. [TowerTalk] Soil Probe Calculator (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 23 Dec 2021 10:40:34 -0800; I've written a Windows program that calculates ground permittivity, conductivity, and skin depth using impedance data from a soil probe and vector network analyzer, such as a NanoVNA. Realistic groun; /archives//html/Towertalk/2021-12/msg00109.html (7,378 bytes)

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