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101. Re: Topband: Connector installation on flooded cable (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 20 Jul 2012 20:12:50 -0500; I know people who use that stuff, but where do you get C wire? 73, Mike www.w0btu.com _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK; /archives//html/Topband/2012-07/msg00252.html (8,630 bytes)
102. Re: Topband: C Rural WIre (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sun, 22 Jul 2012 18:37:57 -0500; Thank you Jim, and all the others who have responded on- and off-list to my question. :-) 73, Mike www.w0btu.com _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK; /archives//html/Topband/2012-07/msg00274.html (6,581 bytes)
103. Re: Topband: Beverage (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sun, 22 Jul 2012 19:04:51 -0500; We can place our conductors vertically if we have a narrow spacing (say, ~1"), but how about using wide-spaced line (~12")? It doesn't take much imbalance to affect the F/B ratio. I think that Harold; /archives//html/Topband/2012-07/msg00275.html (7,775 bytes)
104. Re: Topband: WD1A (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 23 Jul 2012 09:12:35 -0500; I think the characteristics of so-called WD-1 surplus phone line varies. FWIW, the two short samples of WD-1 that I have here are as follows: 115 ohms impedance, calculated from the following: .033 d; /archives//html/Topband/2012-07/msg00284.html (7,627 bytes)
105. Re: Topband: WD1A (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 23 Jul 2012 16:41:26 -0500; Gary, was your 140 ohm WD-1A made from .0393 (1mm) diameter wires, spaced .118 center-to-center? My math says that should be a little over 140 ohms. But the stuff I was talking about was a different; /archives//html/Topband/2012-07/msg00304.html (8,344 bytes)
106. Re: Topband: WD1A (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 23 Jul 2012 18:50:52 -0500; Tom, I realized that the field extends beyond the dielectric into the air, and so I played with lower values of permittivity to see how much changing that would affect the results. But you are certai; /archives//html/Topband/2012-07/msg00309.html (9,396 bytes)
107. Re: Topband: Lyme Desease (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 23 Jul 2012 20:59:20 -0500; This off-topic discussion about ticks (I've never worked T1CK on 160m ;-) is certainly an eye-opener. Since I've moved to Missouri, I've certainly had my share of tick bites, many of them from being; /archives//html/Topband/2012-07/msg00315.html (8,243 bytes)
108. Re: Topband: Beverage antennas (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Tue, 24 Jul 2012 08:17:20 -0500; It's interesting to read the results of the comparison that Herb did between some and open wire line back in 2008: http://lists.contesting.com/_topband/2008-12/msg00016.html As for low velocity fact; /archives//html/Topband/2012-07/msg00319.html (8,752 bytes)
109. Re: Topband: How to Measure Beverage Common Mode Noise (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Tue, 24 Jul 2012 12:47:44 -0500; Wayne, What is more important than a little weak noise is common-mode signal. Why don't you also test to see how well you can hear any AM broadcast stations with the coax terminated? Please also tell; /archives//html/Topband/2012-07/msg00327.html (7,207 bytes)
110. Re: Topband: How to Measure Beverage Common Mode Noise (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Tue, 24 Jul 2012 13:42:58 -0500; Wayne is using a DX Engineering bi-directional system. Unless DXE changed to ununs without telling anyone, he has little to worry about there. ;-) 73, Mike www.w0btu.com _____________________________; /archives//html/Topband/2012-07/msg00330.html (7,663 bytes)
111. Re: Topband: Spark gaps (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 27 Jul 2012 10:33:22 -0500; I don't think carbon balls are suitable for lightning protection. Think of the voltage drop that would appear across each ball during a direct hit. I think they would vaporize. At http://www.rossengi; /archives//html/Topband/2012-07/msg00365.html (9,473 bytes)
112. Re: Topband: Spark gaps (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 27 Jul 2012 15:18:28 -0500; Man, I don't know, Dave. How long have they been selling those carbon balls for that purpose? I don't have the figures in front of me, but carbon has a significant amount of resistance. (Maybe that's; /archives//html/Topband/2012-07/msg00372.html (10,671 bytes)
113. Re: Topband: Spark gaps (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 27 Jul 2012 16:26:50 -0500; Thanks, Dave. That's amazing, and I won't argue anymore, even though I didn't (and probably won't) check your figures. I would have thought that the carbon sphere would have a MUCH greater resistance; /archives//html/Topband/2012-07/msg00377.html (9,401 bytes)
114. Re: Topband: Soldering in the wild (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sun, 5 Aug 2012 16:26:30 -0500; Once I bought my little Mapp gas/oxygen torch, I stopped using a propane torch because I HATE the way the flame changes when you tilt it. For soft-soldering in a remote location, we can adjust it so; /archives//html/Topband/2012-08/msg00126.html (8,027 bytes)
115. Re: Topband: Radials over a stone wall (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sat, 11 Aug 2012 10:04:47 -0500; You have to be careful doing that. Some types of carbide will instantly crack from the thermal shock of cooling too fast. It's better just to retract the drill a lot so that the grooves in the drill; /archives//html/Topband/2012-08/msg00183.html (10,707 bytes)
116. Re: Topband: Image on 160M (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Tue, 14 Aug 2012 17:19:11 -0500; Maybe you can hear better than I can, but it sounds like a fluke. I have two VERY broadband 580' bidirectional Beverages, and I have never seen any AM BCB spurs at 5 kHz points. I've only seen them a; /archives//html/Topband/2012-08/msg00226.html (7,845 bytes)
117. Re: Topband: Image on 160M (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Tue, 14 Aug 2012 17:59:59 -0500; That's exactly what I was thinking. This is the preamp I use on my RX antennas: http://www.w0btu.com/W0BTU-broadband-preamps.html . It's been in service for many years and works great. Even with a 10; /archives//html/Topband/2012-08/msg00228.html (8,631 bytes)
118. Re: Topband: Threading radials (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 17 Aug 2012 11:42:29 -0500; I've found that black Thomas & Betts Ty-Raps are UV resistant, at least in the Ohio sun. I think the T&B p/n was TY-525-M. 73, Mike www.w0btu.com _______________________________________________ UR RS; /archives//html/Topband/2012-08/msg00259.html (7,892 bytes)
119. Re: Topband: Ty-wraps (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 17 Aug 2012 20:19:58 -0500; Did you mean black T&B Ty-Raps from Home Depot? _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK; /archives//html/Topband/2012-08/msg00275.html (8,584 bytes)
120. Re: Topband: "Missing" Buried Radials for a Monopole (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 24 Aug 2012 10:45:02 -0500; Tom, Do you think that radials --either elevated or laying on the ground-- radiate? Or does all of the radiation come from the vertical monopole under the radial system? There is a recent thread abou; /archives//html/Topband/2012-08/msg00287.html (7,296 bytes)

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