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1. [TowerTalk] Off topic post - need help (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Thu, 10 Dec 1998 16:58:07 -0500; I'm hoping that I'll be forgiven for posting something that has nothing to do with towers but, occassionally, a question needs an answer and one is not subscribed to an appropriate reflector. In a nu; /archives//html/Towertalk/1998-12/msg00135.html (7,521 bytes)
2. [TowerTalk] Power x RG58 (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 08 Nov 1998 15:53:31 -0500; The power rating of coax varies approximately with the square root of frequency ( 2 X freq power, is divided by 1.414; 4 x freq, power is divided by 2). The power loss is converted to heat so the act; /archives//html/Towertalk/1998-11/msg00206.html (8,171 bytes)
3. [TowerTalk] Tiller Details for Tramming Antennas (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Fri, 09 Oct 1998 19:30:31 -0400; I don't have a scanner to transmit a drawing but it's pretty simple to explain. Imagine a three element Yagi with one side of the driven element sawed off about 3ft from the boom. The haul-up line at; /archives//html/Towertalk/1998-10/msg00231.html (7,538 bytes)
4. [TowerTalk] Aluminum mast (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 11 Oct 1998 20:58:59 -0400; I had an aluminum mast up for several years in a Rohn 25 "snorkle" type top section. Upon removal, I found that the aluminum was heavily scored where it rubbed against the steel. The use of an alumin; /archives//html/Towertalk/1998-10/msg00286.html (7,961 bytes)
5. [TowerTalk] Loos Tension Gauge (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Mon, 03 Aug 1998 17:37:09 -0400; Has anyone checked the calibration using 3/16 or 1/4 in dia EHS guy wire. It would be interesting to see how close it compares with the 1/19 stranded SS wire in the booklet. 73, Roger -- FAQ on WWW:; /archives//html/Towertalk/1998-08/msg00030.html (6,812 bytes)
6. [TowerTalk] Plastic Owls (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Fri, 14 Aug 1998 16:55:16 -0400; No, but it was very effictive at getting tourists to stop beside the road and take pictures! 73, Roger -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com; /archives//html/Towertalk/1998-08/msg00445.html (7,719 bytes)
7. [TowerTalk] Inverse Tramming - Getting the ant. back down (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Fri, 31 Jul 1998 19:25:27 -0400; One thing we Mainiacs have used with great success is a "tiller" attached to the boom. It's basically just a piece of tubing about 5 ft long attached to the boom with a boom-to-mast clamp. The loweri; /archives//html/Towertalk/1998-07/msg00001.html (7,523 bytes)
8. [TowerTalk] LMR 400 VS 9913? (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Mon, 13 Jul 1998 17:38:10 -0400; Hi Bill...a big problem with 9913 and other air dielectric lines is moisture intrusion. The commercials get around this by keeping their lines pressurized. here's the scenario. The coax warms up in t; /archives//html/Towertalk/1998-07/msg00403.html (8,133 bytes)
9. [TowerTalk] TA-33 feed (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Thu, 23 Jul 1998 17:25:14 -0400; Yes...I believe it! Picture a TA-33 without balun. Vertical run of feedline in proximity to vertical run of coax to TV set. Currents flowing on outside of TA-33 coax can easily induce enough signal i; /archives//html/Towertalk/1998-07/msg00779.html (9,006 bytes)
10. [TowerTalk] Reflections, Conjugate Matching and Jim Reid's comments (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 26 Jul 1998 18:44:06 -0400; I work for a small mfr of FM and TV antennas. One of the biggest reasons for minimizing SWR in the commercial world is that the reflected signal undergoes a time delay going from the antenna to the x; /archives//html/Towertalk/1998-07/msg00864.html (8,487 bytes)
11. [TowerTalk] Vertical? (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Thu, 11 Jun 1998 16:51:45 -0400; The GAP really needs radials to play properly. I have a DX-77 and it's useless in rainy weather! I think the exposed trap design is the problem. 73, Roger -- FAQ on WWW: http://www.contesting.com/tow; /archives//html/Towertalk/1998-06/msg00365.html (8,010 bytes)
12. [TowerTalk] Clicking? & F-12 antennas (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Mon, 22 Jun 1998 19:52:24 -0400; Try putting some static drain resistors across the points where it's arcing. 100K @ 2 watts ought to do nicely. 73, Roger -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: tower; /archives//html/Towertalk/1998-06/msg00786.html (7,581 bytes)
13. [TowerTalk] [Fwd: power line interference to radio equipment -Reply] (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Wed, 13 May 1998 20:57:00 +0100; Apparently Mr Gauthier has not read 47 CFR part 15! This clearly gives the FCC the power to regulate interference causing devices. 73, Roger -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html; /archives//html/Towertalk/1998-05/msg00396.html (7,363 bytes)
14. [TowerTalk] Create Design (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sat, 17 Jan 1998 07:35:51 -0500; Are there any distributors for Create antennas in the US? They had a 80m ZL Special type antenna several years ago that I'm interested in. Anyone have experience with this antenna? I think it was AFA; /archives//html/Towertalk/1998-01/msg00268.html (6,791 bytes)
15. [TowerTalk] Cushcraft X7 (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 19 Oct 1997 12:41:20 +0100; Hi Mike... If you use an isotropic radiator for the reference and add in 6 db ground reflection gain , it's possible for a dipole to have 8.15 db "gain" by itself! 73, Roger -- FAQ on WWW: http://www; /archives//html/Towertalk/1997-10/msg00510.html (7,389 bytes)
16. [TowerTalk] Tower lightning query (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Tue, 01 Jul 1997 17:44:34 -0400; I was Commanding Officer at USCG LORAN Station Caribou, Me for 4 years. The LORAN antenna was a skeleton cone suspended between four 700ft towers in a square 1400 ft on a side. The Caribou area has s; /archives//html/Towertalk/1997-07/msg00025.html (7,013 bytes)
17. Questions (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 08 Dec 1996 01:36:34 +0000; Does anyone have a formula for computing the equivalent diameter of triangular tower sections so that one can accurately model them on a computer? I'm also planning a killer 160 antenna for spring. W; /archives//html/Towertalk/1996-12/msg00102.html (6,915 bytes)
18. Guy Line Tension (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Mon, 16 Dec 1996 13:21:58 +0000; I have no idea about guy tension but all that stuff above the rotator surely exceeds the allowable side load unless you have some sort of rotating guy ring. Happy Holidays.....Roger -- FAQ on WWW: ht; /archives//html/Towertalk/1996-12/msg00237.html (9,691 bytes)

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