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81. Re: Topband: Andrew RG6 specs ? (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 18 Mar 2014 20:18:14 +0000; Regarding the copper clad steel (CCS) center conductor, you can easily get RG6 with a solid bare copper (BC) center conductor too. BC center conductor is important for security cameras (which are bas; /archives//html/Topband/2014-03/msg00144.html (9,554 bytes)
82. Re: Topband: Antenna matching question (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 18 Mar 2014 20:28:43 +0000; The inductors are homebrew, but beefy. Basically I use 1/8" thick G10 phenolic with holes drilled in a cross vise (to maintain spacing), 8 gauge wire for the windings, and three aluminum brackets sha; /archives//html/Topband/2014-03/msg00145.html (8,785 bytes)
83. Re: Topband: Fwd: cable clamps on old Phillystran (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Fri, 30 May 2014 20:18:29 +0000; Just a thought, but has anyone checked to see if there is a dead-end / preform type of grip that will work on the older style phillystran cable? That might make a better connection than the clamps an; /archives//html/Topband/2014-05/msg00044.html (9,348 bytes)
84. Re: Topband: 50 ohm direct burial coax cable (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 3 Jun 2014 14:58:51 +0000; Usually "direct burial" cable is just a PE jacket with a flooding compound in the braid. Times Microwave makes a direct burial variant of their LMR-400 called "LMR-400-DB". It adds a flooding compoun; /archives//html/Topband/2014-06/msg00025.html (10,782 bytes)
85. Topband: Fsj4 series heliax around a rotor (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Sun, 8 Jun 2014 02:03:19 +0000; Sorry for this not being entirely topband-related, but I'm hoping some people here have tried this. I have a beam on a rotor than has lmr400 feeding it now. The cable has been damaged by critters tha; /archives//html/Topband/2014-06/msg00043.html (7,174 bytes)
86. Re: Topband: Deployable radials for 80/160M - Summary (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Wed, 25 Jun 2014 22:03:54 +0000; Easy and cheap option (instead of Teflon insulation): use polyethylene insulated wire. Almost all of the outdoor-type telephone wire is of this type. It's the PVC insulated wire that typically deteri; /archives//html/Topband/2014-06/msg00203.html (14,313 bytes)
87. Re: Topband: Spam:************, Re: Deployable radials for 80/160M (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Thu, 26 Jun 2014 21:24:15 +0000; You can get solid thhn. Some codes even require it, but it is much less common. I've seen Home Depot stock it before. Supply houses should definitely be able to get it. Sent from my iPhone __________; /archives//html/Topband/2014-06/msg00221.html (12,453 bytes)
88. Re: Topband: Beverage feedline (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Thu, 26 Jun 2014 21:27:57 +0000; The copper clad steel center conductor won't make much difference in terms of loss on 160m. It is an issue if you will be powering Anything through the coax (like amps or antenna selection relays) si; /archives//html/Topband/2014-06/msg00222.html (8,272 bytes)
89. Re: Topband: Rig Comparisons (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Mon, 4 Aug 2014 01:18:31 +0000; I think it depends on how much of the "r" in "sdr" is "sd". The k3 does all the baseband modulation/demodulation in DSP, but has a pretty conventional IF path. Some people consider the K3 an SDR beca; /archives//html/Topband/2014-08/msg00020.html (9,926 bytes)
90. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Mon, 4 Aug 2014 22:40:23 +0000; I used to think amidon was expensive too, but just last week I ordered some cores from them that we're almost 30% cheaper than mouser. I was pretty surprised. It's probably worth checking prices agai; /archives//html/Topband/2014-08/msg00025.html (7,138 bytes)
91. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 5 Aug 2014 18:22:47 +0000; FT-240-61 cores. Amidon was $9/ea, Mouser (for the Fair Rite equivalent) was $14/ea. I was only ordering six cores so I couldn't make anyones quantity break. Digi Key I don't think has many of the la; /archives//html/Topband/2014-08/msg00034.html (11,265 bytes)
92. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 5 Aug 2014 18:34:39 +0000; I don't think it was entirely a "scam" on the part of Amidon. When you think about it, FT-240-31 is easier to know "Ferrite, Toroid, 2.4" OD material #31" is a lot easier to remember than "2631803802; /archives//html/Topband/2014-08/msg00035.html (10,262 bytes)
93. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 5 Aug 2014 18:54:48 +0000; Well, I should have them in a few days so Ill check them out and report back what I find. Maybe Greg just got some from a bad lot? -Bill Those were the SAME Amidon cores that Greg, W9GB said were cru; /archives//html/Topband/2014-08/msg00039.html (9,620 bytes)
94. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 5 Aug 2014 19:29:23 +0000; It sounds like they werent properly fired from what he said about them crumbling. That, at least, is an easier thing to look for than a messed up mix. If they have poor QC on these things then Id be; /archives//html/Topband/2014-08/msg00042.html (10,953 bytes)
95. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 5 Aug 2014 21:51:52 +0000; I was buying fair rite #5961003801 though which are $15.79/ea in single-unit quantities from mouser (that is the usual 2.4" od toroid in #61 that is commonly used for baluns). I think one of the othe; /archives//html/Topband/2014-08/msg00047.html (10,721 bytes)
96. Re: Topband: Ferrite Cores (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Fri, 8 Aug 2014 00:24:34 +0000; My cores arrived yesterday. I haven't done any electrical testing on them yet, but mechanically they appear to be fine. They were not "crumbly" as some were concerned about. I don't think they are as; /archives//html/Topband/2014-08/msg00066.html (12,688 bytes)
97. Re: Topband: Outdoor rope suggestions (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Tue, 2 Sep 2014 23:00:29 +0000; With the cheaper pulleys the top can bind between the sheave and sides of the pulley. Binding rope will chew up the rope as well as add significant friction. The better sailing-type pulleys that have; /archives//html/Topband/2014-09/msg00032.html (11,342 bytes)
98. Re: Topband: WTB: Guy wire stuff (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Thu, 4 Sep 2014 17:31:07 +0000; If you only need a few like this, try calling some of the utility contractors in your area. They will always have the dead ends and the guys that also do the power work will also have the insulators.; /archives//html/Topband/2014-09/msg00044.html (10,294 bytes)
99. Re: Topband: WTB: Guy wire stuff (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Thu, 4 Sep 2014 18:37:30 +0000; The "Big Grips" are just the ones for the larger diameter cables. I think they start at 1/2" and go up from there. It's rare to see utilities use larger than 3/8", and 1/4" is by far the most common; /archives//html/Topband/2014-09/msg00049.html (9,440 bytes)
100. Re: Topband: WTB: Guy wire stuff (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Thu, 4 Sep 2014 20:07:51 +0000; The guy-grips ("regular" / utility style) are supposed to be (according to catalog data) be of the same strength as the cable they are designed to grip. In that industry, the line tension is part of; /archives//html/Topband/2014-09/msg00054.html (10,199 bytes)

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