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Total 30 documents matching your query.

1. [TowerTalk] Need documentation for Rohn HW (36G / Motorola tower) (score: 1)
Author: John Keating <john.keating@sbcglobal.net>
Date: Tue, 9 Jun 2015 12:54:08 -0700
Does anyone have documentation for this tower? I called Rohn, they don't have it any more. Tower was produced exclusively for Motorola years ago, there are a number of them around. John / KK6PLG ____
/archives//html/Towertalk/2015-06/msg00128.html (6,782 bytes)

2. [TowerTalk] Correction: Need documentation for Rohn HW (35G / Motorola tower) (score: 1)
Author: John Keating <john.keating@sbcglobal.net>
Date: Tue, 9 Jun 2015 13:16:38 -0700
Sorry, meant "35G" Does anyone have documentation for this tower? I called Rohn, they don't have it any more. Tower was produced exclusively for Motorola years ago, there are a number of them around.
/archives//html/Towertalk/2015-06/msg00129.html (8,268 bytes)

3. [TowerTalk] Antenna near chimney - bad idea? (score: 1)
Author: John Keating <john.keating@sbcglobal.net>
Date: Mon, 29 Jun 2015 10:01:47 -0700
I have limited options for placing my 40' tower and tribander at my QTH. One of them is next to the 2 story house very near the 33' chimney. Am wondering if anyone has experience...soot affecting rot
/archives//html/Towertalk/2015-06/msg00308.html (7,295 bytes)

4. Re: [TowerTalk] Fwd: Antenna near chimney - bad idea? (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Tue, 30 Jun 2015 19:43:26 -0700
Suppose the only thing burned are those store-bought duraflame fire logs? John KK6PLG To: towertalk@contesting.com Subject: [TowerTalk] Fwd: Antenna near chimney - bad idea? Message-ID: <14e45ea4da6-
/archives//html/Towertalk/2015-06/msg00326.html (7,651 bytes)

5. [TowerTalk] direct burial rotator cable? (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 4 May 2016 19:10:17 -0700
Is anyone aware of a source for direct burial rotator control cable? 73, John / AI6LY _______________________________________________ _______________________________________________ TowerTalk mailing
/archives//html/Towertalk/2016-05/msg00082.html (7,257 bytes)

6. [TowerTalk] antenna mast lubrication (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Sun, 2 Apr 2017 10:59:13 -0700
Should the mast section that is inside the tube of the tower top section be lubricated? For example on a Rohn 25 without thrust bearings. If so, wet or dry lube? John / AI6LY ________________________
/archives//html/Towertalk/2017-04/msg00017.html (6,655 bytes)

7. Re: [TowerTalk] Rebar Cage for Foundation (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 10 May 2017 09:23:05 -0700
It's not necessary to weld rebar. Concrete is strong under compression, weak under tension. That's why the rebar is positioned near the perimeters of the tower base form, not in the middle or at the
/archives//html/Towertalk/2017-05/msg00071.html (8,295 bytes)

8. [TowerTalk] VaporBloc VB-8 coax (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Mon, 28 Aug 2017 07:16:16 -0700
I acquired a nice length of Decibel Products VB-8, am interested to determine if it's good and how to terminate it. Before I removed the old weathered connectors I checked with my antenna analyzer an
/archives//html/Towertalk/2017-08/msg00304.html (7,382 bytes)

9. [TowerTalk] LMR400-LLPL / AI6LY (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Thu, 30 Nov 2017 09:23:56 -0800
Does anyone have experience with Times LMR400-LLPL black jacket cable as feedline to yagi on rotator? This cable has low density PTFE tape dielectric and I'm wondering how it holds up with repeated f
/archives//html/Towertalk/2017-11/msg00274.html (6,731 bytes)

10. [TowerTalk] adjusting coil-loaded yagis (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Fri, 19 Jan 2018 17:41:23 -0800
Does the same process of estimation for adjustment of element length apply to coil-loaded yagis as for, say, wire or other dipoles? I.e., in which one takes the percentage of measured frequency above
/archives//html/Towertalk/2018-01/msg00163.html (6,803 bytes)

11. [TowerTalk] need advice on calculating coil Q (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Thu, 1 Mar 2018 10:46:15 -0800
I'm attempting to characterize an antenna coil. I have a meter than can measure at 100kHz, which indicated L = 13uH and Rs = 0.322 and Q = 25. Those would indicate X(L) = 8.17 ohms at 100kHz. The val
/archives//html/Towertalk/2018-03/msg00001.html (6,912 bytes)

12. Re: [TowerTalk] add a 3rd el to 40-2cd (now coils) (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 14 Mar 2018 23:11:45 -0700
I saw the comments about the low Q coils on the 402-CD, and had heard similar comments about similarly constructed coils, which got me thinking about the ones on my 2L 40M yagi and wondering (again)
/archives//html/Towertalk/2018-03/msg00112.html (7,557 bytes)

13. [TowerTalk] Adjusting the reflector (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Sun, 8 Apr 2018 20:29:38 -0700
I'm getting ready to make another, hopefully the last, adjustment on the reflector length of my 2 element 40M coil loaded short boom yagi. Looking for recommendations or calculation methodology to op
/archives//html/Towertalk/2018-04/msg00150.html (8,385 bytes)

14. [TowerTalk] Rohn 35 base (score: 1)
Author: John Keating <john.keating@sbcglobal.net>
Date: Sun, 2 Sep 2018 10:58:22 -0700
Try Norm's Fab, W8TTH. He made a nice hinged base for my "35", also the guy bracket and rotator plate. He has dimensions for the "35", aka Rohn HG. Interestingly, my Z-braces are in the reverse direc
/archives//html/Towertalk/2018-09/msg00007.html (7,177 bytes)

15. [TowerTalk] freight services (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Fri, 9 Nov 2018 14:58:17 -0800
Can anyone recommend a shipper for 10-foot tower sections? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.
/archives//html/Towertalk/2018-11/msg00074.html (7,137 bytes)

16. Re: [TowerTalk] Ham Antenna Rotator: The Teardown (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Mon, 3 Dec 2018 09:43:25 -0800
Nice overview. I have a Ham-II -- not much difference between models. Old ones can be updated by replacing the ring gear with a stainless steel one, replacing the ball bearings and race sleeves, lubr
/archives//html/Towertalk/2018-12/msg00032.html (7,713 bytes)

17. Re: [TowerTalk] Ropes in trees (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 26 Dec 2018 22:10:48 -0800
I got a launcher called the AirBoss, made by KR4LO. Shoots a 2 oz. weight attached to fishing line. Will let you know how it works after I try it this week. See http://www.kr4loairboss.com/ 73, John
/archives//html/Towertalk/2018-12/msg00267.html (8,363 bytes)

18. Re: [TowerTalk] Need plates for 65G (Jim) (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 15 May 2019 18:19:00 -0700
Norms Fab is not difficult to deal with. It's a one man shop so they are not able to respond or deliver quickly. If you aren't in a hurry, Norm does a fabulous job of fabrication and the price is rig
/archives//html/Towertalk/2019-05/msg00092.html (8,143 bytes)

19. [TowerTalk] mystery tower (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 12 Jun 2019 20:33:13 -0700
I thought I had this figured out, but maybe not. My tower has the same dimensions as the Rohn HW (the "Motorola Contract Tower"), except that the cross bracing goes in the opposite direction. A fello
/archives//html/Towertalk/2019-06/msg00073.html (6,742 bytes)

20. [TowerTalk] Stauff clamps (score: 1)
Author: "John Keating" <john.keating@sbcglobal.net>
Date: Wed, 17 Jul 2019 07:10:00 -0700
Wondering if anyone has a couple of Stauff clamps for 2" tube they would part with (or knows of a distributor that will sell small quantities). Looking for the polyamide standard series version with
/archives//html/Towertalk/2019-07/msg00170.html (7,156 bytes)


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