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Total 309 documents matching your query.

261. 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)

262. [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)

263. [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)

264. [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)

265. [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)

266. [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)

267. [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)

268. Re: [TowerTalk] FAA rural tower registration (score: 1)
Author: Brian Amos <bamos1@gmail.com>
Date: Fri, 8 Nov 2019 22:58:18 -0700
I live in a similar situation, although I have very tall (80+ ft tall) trees on my property so I figure they'd hit a tree before my tower (only 50'). Personally, I'd put a light on top, and paint it
/archives//html/Towertalk/2019-11/msg00068.html (11,363 bytes)

269. [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)

270. [TowerTalk] RFI, BN-86, and Choke Balun (score: 1)
Author: Brian Rehmer via TowerTalk <towertalk@contesting.com>
Date: Thu, 16 Apr 2020 12:20:07 +0000 (UTC)
For sometime I have been struggling with noise (S4-7) on HF bands with my TH-5DX tribander.  I have ~125 feet of RG-8 routed to a BN-86 at the antenna feed.  There are several other feeds that are bu
/archives//html/Towertalk/2020-04/msg00137.html (7,955 bytes)

271. [TowerTalk] RFI, BN-86, and Choke Balun (score: 1)
Author: Brian Rehmer via TowerTalk <towertalk@contesting.com>
Date: Fri, 17 Apr 2020 15:53:53 +0000 (UTC)
I think I have messed up the links to my original post (sorry) and thanks to all the responses.  K9YC provided the following response and I would like to continue on this line of thought.  That could
/archives//html/Towertalk/2020-04/msg00142.html (11,866 bytes)

272. Re: [TowerTalk] Measuring resonance of a yagi element (score: 1)
Author: Brian Rehmer via TowerTalk <towertalk@contesting.com>
Date: Thu, 23 Apr 2020 23:24:14 +0000 (UTC)
So, are there any nec models for Hygain Yagis?  I am interested in adding rotary dipole for 18 and 24 MHz with my th5dx. BrianKc4kk Thanks, Brian I always wondered about that. That was way before com
/archives//html/Towertalk/2020-04/msg00184.html (10,833 bytes)

273. [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)

274. 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)

275. Re: [TowerTalk] Looking for some foundation advice (score: 1)
Author: Brian Amos <bamos1@gmail.com>
Date: Thu, 28 May 2020 16:29:16 -0600
Don, I'm a geotechnical engineer, and frequently provide recommendations for foundations for antenna towers (typically commercial towers, as residential towers usually don't require engineering in ou
/archives//html/Towertalk/2020-05/msg00203.html (11,432 bytes)

276. [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)

277. Re: [TowerTalk] Removing ground rods (score: 1)
Author: Brian Amos <bamos1@gmail.com>
Date: Tue, 30 Mar 2021 21:56:26 -0600
Ive been doing this for years for work applications. I use vice grips or a pipe wrench, depending on rod thickness, and a hydraulic automotive jack sitting on an 8 long 2x6. Sometimes using 2 pipe wr
/archives//html/Towertalk/2021-03/msg00343.html (9,270 bytes)

278. Re: [TowerTalk] Need help buying first tower (score: 1)
Author: Brian Amos <bamos1@gmail.com>
Date: Tue, 13 Apr 2021 06:26:45 -0600
Ross, I see from your signature that you are associated with ASU. There are some great resources around the Phoenix area. The ham clubs would be a great resource (there are several) as well as HRO, w
/archives//html/Towertalk/2021-04/msg00082.html (11,326 bytes)

279. [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)

280. Re: [TowerTalk] Earth Ground: How good is good enough (score: 1)
Author: Brian Amos <bamos1@gmail.com>
Date: Fri, 10 Sep 2021 06:40:18 -0600
Dave, To determine your worst case ground resistance, youll want to get ahold of a local geotechnical engineer and ask them to come do it for you. Youll want it done during the driest time of the yea
/archives//html/Towertalk/2021-09/msg00110.html (12,993 bytes)

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