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261. Re: [TowerTalk] Beverage Antenna (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 03 Feb 2015 15:52:26 -0500; Pat, 8 to 10 feet above the barbed wire fence would be your only chance if you are to use the existing fence lines. I would strongly suggest reading some (all) of the references you have been offered; /archives//html/Towertalk/2015-02/msg00097.html (17,002 bytes)
262. Re: [TowerTalk] Beverage Antenna (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 03 Feb 2015 18:10:17 -0500; Grant, Thanks for the modelling and the insulator idea. I'd suspect one might be able to tweak the lengths between insulators to find a "non-resonant" length on both 160/80 to minimize the impact of; /archives//html/Towertalk/2015-02/msg00105.html (12,723 bytes)
263. Re: [TowerTalk] Dipole Center Insulator (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 09 Feb 2015 21:31:34 -0500; I don't care for the Budwig with it's heavy rod connections. I found it difficult to get reliable connections to the legs of the antenna that don't break. My recent wires have used the Jetstream cent; /archives//html/Towertalk/2015-02/msg00168.html (10,207 bytes)
264. Re: [TowerTalk] [Bulk] 30 foot Rohn 25G calculations (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 12 Feb 2015 14:00:26 -0500; Yes, the Rohn 25 example for 130 MPH shows ~10 sq. ft. with one set of guys at 35 feet. 73, ... Joe, W4TV Someone tried to talk me out of it since I have such a small yard. Heck, I only want to go u; /archives//html/Towertalk/2015-02/msg00231.html (11,399 bytes)
265. Re: [TowerTalk] 30 foot Rohn 25G calculations (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 12 Feb 2015 15:30:26 -0500; A free-standing Universal aluminum tower composed of 26" tapered, 22" tapered, and 18" topper will support ANY common tribander/vertical/VHF combo presently being used in ham radio. While that may b; /archives//html/Towertalk/2015-02/msg00234.html (15,425 bytes)
266. Re: [TowerTalk] 30 foot Rohn 25G calculations (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 12 Feb 2015 17:38:18 -0500; I saw plenty of Heights and Universal towers that were egged out during my time on Ohio. Many of them had the bolts/nuts tightened to the point that the legs were somewhat flattened but that did not; /archives//html/Towertalk/2015-02/msg00236.html (17,747 bytes)
267. Re: [TowerTalk] rg-59 manufacturer (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 15 Feb 2015 20:18:49 -0500; I'd say the effective diameter of the stranded center conductor is a bit larger than the solid center conductor and they did not change the density of the dielectric to compensate. That's nothing mo; /archives//html/Towertalk/2015-02/msg00254.html (11,285 bytes)
268. Re: [TowerTalk] Mosley Antenna Question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 17 Feb 2015 18:07:12 -0500; I too have had Mosley antennas over the years (TA33 and TA36) and in both cases I noticed a significant improvement in performance when I replaced the TA33 with a Cushcraft A4 and the TA36 with a HyG; /archives//html/Towertalk/2015-02/msg00280.html (12,568 bytes)
269. Re: [TowerTalk] Tribander Spacing (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 20 Feb 2015 23:40:11 -0500; Do a sanity check by modeling in EZNEC, 4NEC, etc. over flat earth. HFTA uses point (isotropic) sources and ignores coupling. HFTA will show more ground reflection than is actually present with real; /archives//html/Towertalk/2015-02/msg00377.html (10,782 bytes)
270. Re: [TowerTalk] Mosley Antenna Question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 21 Feb 2015 15:31:54 -0500; Of course if everyone believed that Gotham Antennas would still be in business and we would have never heard of Force 12, Innovantennas, SteppIR, JK Antennas, KLM/M-Squared, etc. 73, ... Joe, W4TV __; /archives//html/Towertalk/2015-02/msg00383.html (9,104 bytes)
271. Re: [TowerTalk] Mosley Antenna Question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 24 Feb 2015 09:56:47 -0500; already ran that test. N6BT ran the test as well, using a spectrum analyzer at the RX end, with SA set to 2db per division. The raw data in the 2nd Edition of the N0AX/K7LXC reports does not support; /archives//html/Towertalk/2015-02/msg00455.html (11,301 bytes)
272. Re: [TowerTalk] Mosley Antenna Question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 26 Feb 2015 18:51:51 -0500; On 2015-02-26 2:29 PM, Kelly Taylor wrote: It's also been fairly well established down through the ages that an optimized 2 el. monoband yagi equals or betters a three-element tribander, owing to the; /archives//html/Towertalk/2015-02/msg00494.html (9,566 bytes)
273. Re: [TowerTalk] SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Feb 2015 10:27:18 -0500; There is no trade-off in gain. Gain is almost entirely a function of boom length as long as you don't have to few elements. For example, SteppIR antennas all show more gain on 10/12 meters than the; /archives//html/Towertalk/2015-02/msg00504.html (11,846 bytes)
274. Re: [TowerTalk] SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Feb 2015 16:39:32 -0500; Doug, The stepper motor does not have any brush contacts. The *elements* have brush contacts at the center - where the feedline connects to the driven element and where the parasitic elements are sho; /archives//html/Towertalk/2015-02/msg00513.html (9,964 bytes)
275. Re: [TowerTalk] SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Feb 2015 16:48:26 -0500; There are several antenna designers who have shown that the impedance a simple driven element is in the mid-20 Ohm range when the antenna is tuned for maximum gain (assuming the boom is not too long; /archives//html/Towertalk/2015-02/msg00515.html (8,151 bytes)
276. Re: [TowerTalk] SterIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 28 Feb 2015 13:01:46 -0500; I cant imagine spending all that money to put that complicated antenna up in the air when an LPDA will do the same thing with no moving parts and, at most, 2dB of claimed gain. A log-periodic is a po; /archives//html/Towertalk/2015-02/msg00528.html (9,638 bytes)
277. Re: [TowerTalk] [Bulk] Re: SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 01 Mar 2015 10:05:13 -0500; On 2015-03-01 5:40 AM, Ian White wrote: Another major failing is the tacky method of connecting the 13 drive wires for the stepper motors - a 10-cent screw terminal block inside a short length of pla; /archives//html/Towertalk/2015-03/msg00010.html (10,108 bytes)
278. Re: [TowerTalk] 80 mts four square or yagi? (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 10 Mar 2015 09:43:37 -0400; HFTA's problems with close spacing begin *much* closer than that - IIRC, <10 ft. From the HFTA Help file: The internal Yagi model in HFTA is a very simple mathematical model. It does not compute inte; /archives//html/Towertalk/2015-03/msg00121.html (15,290 bytes)
279. Re: [TowerTalk] Effect of tower on antenna performance (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 16 Mar 2015 18:11:34 -0400; Assuming your tower is vertical, your Yagi is horizontally polarized and the diameter of the tower is much less than 1/4 wave, the tower will have negligible effect on the Yagi's tuning and pattern.; /archives//html/Towertalk/2015-03/msg00171.html (7,825 bytes)
280. Re: [TowerTalk] Earth Anchors (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 17 Mar 2015 09:06:35 -0400; You might try Tractor Supply - IIRC I've seen them listed on their web site. 73, ... Joe, W4TV On 2015-03-17 8:08 AM, Mike Ryan wrote: I am looking for some 6ft long screw in earth anchors. I was und; /archives//html/Towertalk/2015-03/msg00177.html (10,602 bytes)

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