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61. [TowerTalk] antennas in fresh water (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Fri, 13 Nov 2009 14:09:59 -0800 (PST); Thanks for your comments Rob - I generally agree with your observations. However, my particular cases were (1) An AV3 10-15-20m vertical which works much better at ground level close to the lake than; /archives//html/Towertalk/2009-11/msg00243.html (7,865 bytes)
62. [TowerTalk] Water in Coax (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 25 Nov 2009 17:02:15 -0800 (PST); I have a 300' run of LMR400 going up a tower - at the top are a 900MHz bi-directional amplifier and antenna. The system stopped working properly a while ago, and I eventually (duh) found that the pro; /archives//html/Towertalk/2009-11/msg00463.html (8,112 bytes)
63. [TowerTalk] Tower Lighting (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 21 Apr 2010 11:42:48 -0700 (PDT); I have access to a 325' tower for my remote station, and like to assist the tower owner where possible. The tower lighting is controlled by a light sensistive switch working a relay which actually co; /archives//html/Towertalk/2010-04/msg00631.html (7,424 bytes)
64. [TowerTalk] Field Day Antennas - Multiband Vee-Beam? (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Fri, 23 Apr 2010 12:21:23 -0700 (PDT); Hi Steve The Oxford club tried Vee Beams in the '60s when I was first involved. They need to be tuned for each band just like a doublet, so no advantage there. Our experience was that they were not w; /archives//html/Towertalk/2010-04/msg00729.html (8,568 bytes)
65. [TowerTalk] TowerTalk] Source for Copperclad Steel Wire? (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Tue, 18 May 2010 17:12:47 -0700 (PDT); Last time I needed copper clad steel wire I bought it from Clifford of Vermont - now change to PTSupply. The only thing is that the good stuff is insulated - which I felt was an advantage. They call; /archives//html/Towertalk/2010-05/msg00377.html (7,658 bytes)
66. [TowerTalk] Tower Isolation (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 23 Jun 2010 06:06:03 -0700 (PDT); My remote station is at a former AM broadcast 325' tower. The base insulator is bridged by a thick cable, and there are a number of coax cables going up the tower feeding various VHF and UHF antennas; /archives//html/Towertalk/2010-06/msg00289.html (7,945 bytes)
67. [TowerTalk] Inverted Vee (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Sun, 31 Jul 2011 17:03:41 -0700 (PDT); I propose to tie an inverted vee dipole pretty close to the top of a quite tall tower. I am convinced of the need for a good balun. Is there any advantage to electrically connecting the outer of the; /archives//html/Towertalk/2011-07/msg00382.html (7,486 bytes)
68. [TowerTalk] Emotator 1105MS Rotator & Controller (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Mon, 24 Oct 2011 08:45:19 -0700 (PDT); A while ago my controller stopped indicating the antenna direction, although everything was OK otherwise. Significant messing around later I found that a drive belt in the controller had perished. To; /archives//html/Towertalk/2011-10/msg00354.html (8,215 bytes)
69. Re: [TowerTalk] Emotator 1105MS Rotator & Controller (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 26 Oct 2011 12:02:38 -0700 (PDT); Thanks Don I could only get onionskin paper on a pad rather than for a printer but I tried it anyway. It printed OK, and is significantly better than normal printer paper, but is still quite grainy/p; /archives//html/Towertalk/2011-10/msg00402.html (10,117 bytes)
70. Re: [TowerTalk] trees and verticals (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 28 Dec 2011 07:50:38 -0800 (PST); Eddy and others I am a little unconvinced by some of the arguments that have been presented. Consider a Yagi in free space with nice copper elements. It would work quite well if one could find a way; /archives//html/Towertalk/2011-12/msg00726.html (9,462 bytes)
71. [TowerTalk] trees and verticals (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 28 Dec 2011 09:26:26 -0800 (PST); "You're describing the difference between the near field (wooden element in Yagi) and far field (propagating through a box)." Not really. The box could be in the near field or the far field (I know i; /archives//html/Towertalk/2011-12/msg00732.html (7,518 bytes)
72. [TowerTalk] trees and verticals (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 28 Dec 2011 13:35:12 -0800 (PST); Actually, it does make sense, but it is an incomplete statement. It was supposed to be. I will try to avoid any use of subtlety or irony in future. 73 Roger VE3ZI ____________________________________; /archives//html/Towertalk/2011-12/msg00747.html (7,545 bytes)
73. [TowerTalk] trees and verticals (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 28 Dec 2011 14:10:53 -0800 (PST); There has been a great deal of going around the houses. The original question (and the one that I believe I answered) was related to the effect of trees. Wood is a poor conductor. Even wet wood is a; /archives//html/Towertalk/2011-12/msg00751.html (8,979 bytes)
74. [TowerTalk] trees and verticals (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 28 Dec 2011 14:18:10 -0800 (PST); 'The amount by which it would attenuate it would depend on factors such as size, material, thickness, frequency and so on.' It is certainly true that the attenuation could be very small. It is also t; /archives//html/Towertalk/2011-12/msg00753.html (8,353 bytes)
75. [TowerTalk] Trees and Verticals (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 28 Dec 2011 19:23:16 -0800 (PST); K9YC wrote: "As a sanity check for those who don't know what to believe in this discussion, I would like to observe that Jim Lux is an EE working at JPL (that is, Jet Propulsion Lab, our space progra; /archives//html/Towertalk/2011-12/msg00765.html (8,695 bytes)
76. [TowerTalk] remote control of antenna switch via "wired" UHF (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Mon, 2 Jan 2012 18:05:40 -0800 (PST); Pete I meant to respond to your question earlier, but didn't. I'm not sure of the specifications of the radio switches, but even if they are quite horrible, they should be able to overcome a 60dB pat; /archives//html/Towertalk/2012-01/msg00048.html (8,910 bytes)
77. [TowerTalk] PL259 Insertion Loss? (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Tue, 17 Jan 2012 13:15:41 -0800 (PST); and K9YC replied: If you research the matter, I think you will find that Paul is exactly correct and you are exactly wrong. Professionals were using coaxial cable a long time before amateurs - and pr; /archives//html/Towertalk/2012-01/msg00370.html (7,458 bytes)
78. [TowerTalk] Tower lawsuit (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Sat, 4 Feb 2012 10:50:58 -0800 (PST); "Actually, it's your comment that's kind of unbelievable. ..... What's so hard to understand about that?" in reply to Eddy, VE3CUI's mail on this subject. I cannot begin to grasp your motivation for; /archives//html/Towertalk/2012-02/msg00089.html (7,273 bytes)
79. [TowerTalk] Gas Discharge Tubes (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Tue, 17 Apr 2012 17:02:53 -0700 (PDT); Is anybody aware of a larger gas discharge tube that the Littelfuse CG2-1000? I have been using these at my 160m remote station, and while they have (more than) plenty of headroom for the transmitter; /archives//html/Towertalk/2012-04/msg00337.html (7,260 bytes)
80. [TowerTalk] Hardline Fault (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Tue, 28 Aug 2012 06:02:32 -0700 (PDT); Further to my messages of last week, I have now tried again. The RigExpert TDR gave some sort of results, but was not really terrribly useful. Its built in display just does not have the definition t; /archives//html/Towertalk/2012-08/msg00346.html (8,108 bytes)

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