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61. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 21:50:18 -0400; Hmmm....in our neighborhood we certainly have nothing remotely like a 240 v delta system serving residences, being center tapped and all as mentioned below. What we have are moderately high voltage l; /archives//html/TenTec/2009-04/msg00030.html (12,664 bytes)
62. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 22:39:06 -0400; yep....you are further up the ladder than we are way out here in the country. I sometimes think we get the last electron left on the vine, so to speak :) Certainly its true that many areas use higher; /archives//html/TenTec/2009-04/msg00033.html (14,612 bytes)
63. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 23:08:52 -0400; I guess this just goes to show how much things vary from place to place. I just strolled out to the pole to reassure myself that I was remembering this right. We have two phases being brought down ou; /archives//html/TenTec/2009-04/msg00035.html (17,862 bytes)
64. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 23:40:07 -0400; Your point is well made and I apologize for going so far off-topic. I also have a Corsair II (In fact I have 3 of them, doing various tasks, one of which is serving as an IF strip for my SETI dish re; /archives//html/TenTec/2009-04/msg00039.html (20,472 bytes)
65. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 18:13:03 -0400; I don't feel that this is a particularly good example for the following reason. If, and only if, the ground point at the radio where the coax is terminated to the radio is an excellent RF ground, the; /archives//html/TenTec/2009-04/msg00064.html (12,338 bytes)
66. Re: [TenTec] Faraday cage (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 18:16:20 -0400; That's right Ken. And don't forget to mention that you would also have to avoid ground loops inside the cage. We had a faraday cage at work (Kodak) where we did RF emissions and susceptibility testin; /archives//html/TenTec/2009-04/msg00065.html (11,624 bytes)
67. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 22:58:24 -0400; One should not. I would not. I don't. But lots of people do. Its a valid point for consideration only because it is so common. Now WHY it is so common is a whole other point. But I'm not going to go; /archives//html/TenTec/2009-04/msg00070.html (14,410 bytes)
68. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 23:02:44 -0400; Would you agree that the earth is considered a zero potential reference point when compared to things located on or flying above it ? Would you agree that is true for both DC and AC ? Would you agree; /archives//html/TenTec/2009-04/msg00071.html (11,826 bytes)
69. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 5 Apr 2009 00:30:36 -0400; That's true, one can always take an arbitrary point as a reference. That, however, is not the question I asked. Would you agree that the earth is considered a zero potential reference point when comp; /archives//html/TenTec/2009-04/msg00075.html (10,095 bytes)
70. Re: [TenTec] Faraday cage (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 5 Apr 2009 00:32:30 -0400; Well yes they did. But I think the point made by the other poster was that noise can be generated inside the faraday cage, by the problematic wiring he mentioned, rendering the cage useless. That in; /archives//html/TenTec/2009-04/msg00076.html (10,853 bytes)
71. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 5 Apr 2009 14:22:49 -0400; My point is different. I don't care if the coax radiates. In fact I accept that it will in virtually all cases, at least to a degree. I was referring to the effect at the input to the radio. If we sh; /archives//html/TenTec/2009-04/msg00093.html (11,739 bytes)
72. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 5 Apr 2009 18:46:15 -0400; Ok Jim, I quit. Its a nail. 73 de Gary, AA2IZ I don't care if the coax radiates. In fact I accept that it will in virtually all cases, at least to a degree. I do, for three reasons. RF in the shack,; /archives//html/TenTec/2009-04/msg00099.html (12,618 bytes)
73. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Mon, 6 Apr 2009 19:33:37 -0400; Apropos of this, I use 1 inch OD soft copper refrigeration tubing for my ground connections also. It is quite available and (relatively) inexpensive. I order rolls of it from McMaster Carr, but your; /archives//html/TenTec/2009-04/msg00130.html (14,364 bytes)
74. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Tue, 7 Apr 2009 23:21:37 -0400; Exactly....any reasonable bonding wire is a better solution than using the coax. Do remember that lightning protection must be done outside of the structure. Lightning protection outside, disconnect; /archives//html/TenTec/2009-04/msg00154.html (13,030 bytes)
75. Re: [TenTec] OT: cleaners, etc (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 30 Apr 2009 22:04:06 -0400; Most all of you know this, but for the benefit of those that might be new to it..... Plain aluminum, when exposed to oxygen in the atmosphere for a very short period of time, immediately forms a clea; /archives//html/TenTec/2009-04/msg00386.html (13,065 bytes)
76. Re: [TenTec] OT: cleaners, etc (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 30 Apr 2009 22:13:04 -0400; Hmmm....I did not know about zinc particles in that particular product. Nor did I know that you could form "crystals" of zinc. Perhaps you are just referring to small pieces of zinc. But - are not zi; /archives//html/TenTec/2009-04/msg00387.html (11,522 bytes)
77. Re: [TenTec] OT: cleaners, etc (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 30 Apr 2009 22:14:41 -0400; I suppose everyone already knows that aluminum and stainless react with each other. Ever try to get a stainless bolt out of aluminum threads after a long time ? But I don't know a better combination.; /archives//html/TenTec/2009-04/msg00388.html (9,865 bytes)
78. Re: [TenTec] New Firmware (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Mon, 2 Mar 2009 14:32:25 -0500; Regardless of who is right and who is not, about the various points raised here about Ten Tec radios - a little response from the company, right here in this forum, would go a very long way toward re; /archives//html/TenTec/2009-03/msg00084.html (12,854 bytes)
79. Re: [TenTec] FW Update Problem w/O2 (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Mon, 2 Mar 2009 14:39:07 -0500; Good point....I used to keep a whole stick of UART chips here to replace blown units - back when my private company provided dial-up Internet access. an exasperating and mysterious series of problems; /archives//html/TenTec/2009-03/msg00085.html (13,119 bytes)
80. Re: [TenTec] TEST (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Tue, 3 Mar 2009 21:40:02 -0500; An important point Bob makes is that Ethernet is readily affected by stray RF. In addition to ferrites on the Ethernet cables themselves, I find that ferrites on the power cable to routers, switches,; /archives//html/TenTec/2009-03/msg00133.html (10,892 bytes)

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