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41. [TowerTalk] DXpedition to ND (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Sun, 8 Jul 2001 21:18:54 -0500; There's a contingent of guys locally (central Minnesota) that think it would be nifty to activate North Dakota during a 160 contest this winter. I think their instincts are correct, they'd be pretty; /archives//html/Towertalk/2001-07/msg00134.html (7,569 bytes)
42. [TowerTalk] Top Hat Switch (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Mon, 16 Jul 2001 19:15:56 -0500; I'm building a full sized, base fed (insulated), 80 meter vertical antenna. The design I am playing with uses a top hat to tune the lower portion of 80. Removing the top hat tunes about 3850 or so. T; /archives//html/Towertalk/2001-07/msg00250.html (8,498 bytes)
43. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Wed, 18 Jul 2001 21:54:22 -0500; Many people have responded to my previous post. All responses were quite valid and appreciated--thank you. The consensus was to simply cut it for 75 meters and base load it with a variable inductor a; /archives//html/Towertalk/2001-07/msg00288.html (9,990 bytes)
44. [TowerTalk] 80/40 Top Load Sleeve (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Thu, 19 Jul 2001 15:27:43 -0500; Many have asked for dimensions. Here goes. THE TOWER The model (NEC4WIN95VM) is based on Mininec 3 at this point. I am trying to avoid the need for messing with a full sized 25G tower when simple com; /archives//html/Towertalk/2001-07/msg00306.html (9,668 bytes)
45. [TowerTalk] Lightning Observation (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Sun, 22 Jul 2001 21:11:22 -0500; I was doing tower work on Saturday and decided to head for the shack because of cloud-to-cloud lightning. As I put everything away and was walking to the house, a bolt of lightning shot overhead east; /archives//html/Towertalk/2001-07/msg00402.html (8,331 bytes)
46. [TowerTalk] Quadrifilar antenna (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Mon, 11 Jun 2001 00:29:08 -0500; I have been reading Walt Maxwell's new book Reflections II. He describes a "Quadrifilar Helix" antenna used for satellite work. Anybody played with these babies? I've been modeling the design and it; /archives//html/Towertalk/2001-06/msg00215.html (8,153 bytes)
47. [TowerTalk] Circular Polarization (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Mon, 11 Jun 2001 22:16:14 -0500; I am quite familiar with the vertical and horizontal polarization. The transmitting and receiving antennas need to be alike for best transmission. I am hoping somebody can shed some light on circular; /archives//html/Towertalk/2001-06/msg00240.html (7,604 bytes)
48. [TowerTalk] Sinking Tower... (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Fri, 15 Jun 2001 09:22:04 -0500; I have a 68' Rohn Tiltover and mast at 80'. Each year, (three years now) the guys appear to lose their tension. I notice it in the spring after the thaw (Minnesota). I control the turnbuckles so they; /archives//html/Towertalk/2001-06/msg00381.html (8,265 bytes)
49. [TowerTalk] Sinking Tower, A Question (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Sun, 17 Jun 2001 12:09:38 -0500; Kelly wrote... think is instructive to others. He said he >used the factory spec 2x2x3 base but found the soil to be >quite soft. of the soil? Or is it unavoidable? You make a very good point. When I; /archives//html/Towertalk/2001-06/msg00428.html (8,620 bytes)
50. [TowerTalk] What a weekend!!! (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Sat, 7 Apr 2001 18:49:26 -0500; About all I can do is sit at the window and worry. My 80' tower (68' rohn tiltover with 20' mast sticking 12 feet out of the thrust bearing) is standing in over a foot of water, which just melted. Th; /archives//html/Towertalk/2001-04/msg00170.html (8,110 bytes)
51. [TowerTalk] Engineering antenna (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Thu, 8 Mar 2001 20:02:26 -0600; I am interested in looking at the effectiveness of modeling as a true predictor of feedpoint and loading issues. In many fields of engineering, there are standard devices used to test. E.g. dummies i; /archives//html/Towertalk/2001-03/msg00158.html (7,710 bytes)
52. [TowerTalk] Guy anchor failure (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Tue, 2 Jan 2001 15:00:49 -0600; I had an experience with the screw in type this summer I'd like to share. I bought 6 anchors at fleet farm last summer. They were the 4' variety. The purpose was to straighten my barn. Yep. I pulled; /archives//html/Towertalk/2001-01/msg00066.html (10,201 bytes)
53. [TowerTalk] saw this in the local paper (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Tue, 9 Jan 2001 19:25:58 -0600; I wonder if configuring a hat with a "halo" antenna would help those little follicles? Better yet, increase the power an "boil" the little devils right out of the scalp. Ford-N0FP ford@cmgate.com --; /archives//html/Towertalk/2001-01/msg00246.html (6,726 bytes)
54. [TowerTalk] Beverage height? (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Sat, 13 Jan 2001 17:59:51 -0600; Ron, I have studied the issue (I have the same problem) and came to the conclusion that the propagation factor of the line at low heights is much lower than at higher levels. At 25 feet, I have no cl; /archives//html/Towertalk/2001-01/msg00335.html (8,422 bytes)
55. [TowerTalk] RX input impedance (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Fri, 19 Jan 2001 00:14:37 -0600; I just used the Autek VA-1 to measure the input impedance of the receiver port on my IC-746. Interesting! On most bands, the input impedance measured in the neighborhood of 50 ohms. On 160 meters, it; /archives//html/Towertalk/2001-01/msg00492.html (7,507 bytes)
56. [TowerTalk] RX input impedance (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Fri, 19 Jan 2001 11:00:30 -0600; More information and comments: I plugged the Autek into my spectrum analyser. It's only -10dbm. Hardly enough to "burn out" the receiver... If anything, a guys gotta be very careful not to "bump" the; /archives//html/Towertalk/2001-01/msg00496.html (9,680 bytes)
57. [TowerTalk] VA-1 Output... (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Fri, 19 Jan 2001 16:02:17 -0600; Tom You are right. I went to the analyzer and checked the VA-1 again. After flipping in some front end attenuation, the analyzer shows +10dbm. The reading I took before was compressed at the mixer in; /archives//html/Towertalk/2001-01/msg00509.html (6,785 bytes)
58. [TowerTalk] Business ethics... (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Mon, 22 Jan 2001 21:28:49 -0600; I'm an accountant by profession. All this pain I see on towertalk is very typical of customers doing business with a vendor that has failed and refuses to admit it. I also own three businesses. In ea; /archives//html/Towertalk/2001-01/msg00627.html (10,243 bytes)
59. [TowerTalk] Nolux or not-to-nolux (score: 1): Author: "Ford Peterson" <ford@cmgate.com>; Date: Mon, 4 Jul 2005 00:38:55 -0500; That is the question. I'm putting up an elevated 80M vertical using old Heights tower sections. I intend to load the thing on 80M and want good conductivity in the joints of the tower. There are many; /archives//html/Towertalk/2005-07/msg00033.html (6,978 bytes)
60. Re: [TowerTalk] portable verticals with crummy ground radials (score: 1): Author: "Ford Peterson" <ford@cmgate.com>; Date: Mon, 4 Jul 2005 19:22:19 -0500; ...snip... Jim, I have done some testing with radials, ground stakes, and the like here. The literature that discusses the topic at length echos your model's results regarding gain. Very little diffe; /archives//html/Towertalk/2005-07/msg00055.html (9,903 bytes)

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