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1. Re: [TowerTalk] Purpose of Thrust Bearing (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Mon, 01 Jun 2009 18:41:31 -0400; It's the McMaster-Carr definition. Some people describe using two bearings, one above the other, to prevent lateral forces from acting on a rotor (like a pry bar on a fulcrum), but that's not the des; /archives//html/Towertalk/2009-06/msg00014.html (7,975 bytes)
2. Re: [TowerTalk] Good Quality Pulleys (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Tue, 09 Jun 2009 20:09:43 -0400; How do these look? http://shop.woodenboat.org/c-112-tufnol-blocks-for-38-to-58-line.aspx 73, Mike NF4L _______________________________________________ _______________________________________________; /archives//html/Towertalk/2009-06/msg00245.html (8,819 bytes)
3. Re: [TowerTalk] re-tuning steppirs for lowest vswr (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Tue, 07 Jul 2009 14:10:24 -0400; None. As long as you just change just the driven element length. I'd like to see your data, Rick. 73, Mike NF4L _______________________________________________ _______________________________________; /archives//html/Towertalk/2009-07/msg00079.html (8,383 bytes)
4. Re: [TowerTalk] Tower Grounding advice (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Tue, 07 Jul 2009 14:16:28 -0400; How do you make an electrical connection to concrete? 73, Mike NF4L _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@co; /archives//html/Towertalk/2009-07/msg00080.html (8,624 bytes)
5. Re: [TowerTalk] TH3MKII vs 3 element SteppIR (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Mon, 13 Jul 2009 09:05:08 -0400; Terry - I'm not sure if you mean to leave the dipole up or not. Get the 30/40M driven element, and do away with the dipole, and add a band. Why do you care if it's bigger? Will it extend over your pr; /archives//html/Towertalk/2009-07/msg00195.html (10,156 bytes)
6. Re: [TowerTalk] TH3MKII vs 3 element SteppIR (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Mon, 13 Jul 2009 18:17:42 -0400; Terry - Proximity to the house is a factor, I'd agree. I can't picture your set-up, but I wonder if something like this would help. Pricey, but ingenious. http://www.nn4zz.com/tiltplate.htm I have th; /archives//html/Towertalk/2009-07/msg00221.html (10,967 bytes)
7. [TowerTalk] Mast size (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Thu, 16 Jul 2009 13:14:12 -0400; Would somebody look at the pic at http://nf4l.com/top.htm and verify that's a 25AG section? I'm needing to replace the water pipe mast with something stronger because I want to put a 6M yagi over the; /archives//html/Towertalk/2009-07/msg00302.html (6,876 bytes)
8. Re: [TowerTalk] Mast size (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Thu, 16 Jul 2009 19:11:05 -0400; Nah. I don't climb. IF the section is 25AG, the catalog says 2" OD with 16 ga. walls. 16 ga. is .0598" x 2 = .1196. 2-.1196 = 1.8804. The galvanizing takes up a couple of atoms thickness. Doesn't lea; /archives//html/Towertalk/2009-07/msg00306.html (9,356 bytes)
9. Re: [TowerTalk] Mast size (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Fri, 17 Jul 2009 10:47:06 -0400; Thanks Mike. It did indeed have a bushing, long gone. 1.5" water pipe is 1.9" OD. I really need to replace the water pipe with tubing, so I was trying to verify that my top section isn't gonna work f; /archives//html/Towertalk/2009-07/msg00316.html (12,794 bytes)
10. Re: [TowerTalk] Mast size (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Fri, 17 Jul 2009 10:50:18 -0400; Thanks Jim - If it was 25AG2 I'd be home free. :-) But I don't think it is, therefore the pic for ID. 73, Mike NF4L _______________________________________________ ___________________________________; /archives//html/Towertalk/2009-07/msg00317.html (9,269 bytes)
11. Re: [TowerTalk] Mast size (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Fri, 17 Jul 2009 10:55:48 -0400; It was used Pete. I got a 50' freebie for taking it down, 25 years ago. My guru was all about cheap(hi). It had some kind of vertical welded to the top. Guess I'm gonna have to hunt up a different to; /archives//html/Towertalk/2009-07/msg00318.html (12,287 bytes)
12. Re: [TowerTalk] Mast size (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Fri, 17 Jul 2009 12:44:57 -0400; Thanks Mike - I have the dimensions, just trying to verify that what I think I have is what I really have. From the ground. 73, Mike too _______________________________________________ ______________; /archives//html/Towertalk/2009-07/msg00323.html (15,844 bytes)
13. [TowerTalk] Temperature compensation (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Mon, 20 Jul 2009 09:32:51 -0400; Rohn specs call for 400 lbs. of guy tension at 60 degrees F. Anybody know how to adjust that for different temperatures? 73, Mike NF4L _______________________________________________ ________________; /archives//html/Towertalk/2009-07/msg00391.html (7,109 bytes)
14. [TowerTalk] Temperature compensation (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Mon, 20 Jul 2009 12:58:35 -0400; Rohn specs call for 400 lbs. of guy tension at 60 degrees F. Anybody know how to adjust that for different temperatures? 73, Mike NF4L _______________________________________________ ________________; /archives//html/Towertalk/2009-07/msg00398.html (6,711 bytes)
15. Re: [TowerTalk] Temperature compensation (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Tue, 21 Jul 2009 11:00:05 -0400; Thanks Steve - That works. The tension is displayed as a decimal fraction. .37 would be 370 lbs., right? Mike NF4L _______________________________________________ ____________________________________; /archives//html/Towertalk/2009-07/msg00419.html (10,845 bytes)
16. Re: [TowerTalk] Temperature compensation (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Tue, 21 Jul 2009 15:06:02 -0400; Great. Thanks again Steve. Mike NF4L _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.conte; /archives//html/Towertalk/2009-07/msg00427.html (12,149 bytes)
17. Re: [TowerTalk] Temperature compensation (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Wed, 22 Jul 2009 09:23:28 -0400; Thanks, Bill. That's a keeper. Mike _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contes; /archives//html/Towertalk/2009-07/msg00449.html (8,749 bytes)
18. Re: [TowerTalk] Gem Quad Back in Production (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Sat, 25 Jul 2009 23:20:22 -0400; LeeI had a 4 element Gem as my first directional antenna. I had it on a tilt-over tower, and could work on it from the ground. It was a bear to tune, and I don't think I ever got it right. I took off; /archives//html/Towertalk/2009-07/msg00511.html (9,789 bytes)
19. Re: [TowerTalk] One thrust bearing vs. two (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Wed, 12 Aug 2009 06:26:35 -0400; Two bearings would keep any lateral thrust off the rotor. Mike, NF4L _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@c; /archives//html/Towertalk/2009-08/msg00188.html (7,882 bytes)
20. [TowerTalk] Battle of the bearings (score: 1): Author: Mike <nf4l_NO_SPAM@nf4l.com>; Date: Thu, 13 Aug 2009 20:26:38 -0400; I like to get thoughts/experiences about Rohn TB3 bearings vs. Glenn Martin TB25. The antennae will be a 4 element SteppIR and an M2 6M7JHV on 20 feet of 2" chrom-moly. I plan to use 2 bearings. Can; /archives//html/Towertalk/2009-08/msg00234.html (6,751 bytes)

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