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1. Topband: Testing for common mode noise (score: 1): Author: Don Kirk <wd8dsb@aol.com>; Date: Thu, 18 Aug 2011 11:22:03 -0400; A few weeks ago I installed 3 half size point fed pennants (each aimed approximately 120° apart), and have been wondering if I need to install any chokes and/or ground rod on the feedline near the fe; /archives//html/Topband/2011-08/msg00033.html (8,641 bytes)
2. Re: Topband: Testing for common mode noise (score: 1): Author: Don Kirk <wd8dsb@aol.com>; Date: Mon, 22 Aug 2011 10:50:36 -0400; I received numerous responses regarding my proposed common mode noise test, and here is a summary of the responses. 1) The majority of respondents supported my proposed test. 2) There was really only; /archives//html/Topband/2011-08/msg00050.html (8,041 bytes)
3. Re: Topband: Testing for common mode noise (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 22 Aug 2011 17:42:37 -0700; Two important points, Don. First, noise comes and goes, it isn't present all the time. Second, a common mode choke does not in any way degrade the signal nor the performance of the antenna. Thus, it'; /archives//html/Topband/2011-08/msg00052.html (7,543 bytes)
4. Re: Topband: Testing for common mode noise (score: 1): Author: "n4is" <n4is@comcast.net>; Date: Tue, 23 Aug 2011 01:12:56 -0400; Don Kirk The only way to eliminate Common mode noise is first of all understand the basic concept what it is. Common mode noise is not a noise, it is actually a signal generated by a current called c; /archives//html/Topband/2011-08/msg00054.html (11,655 bytes)
5. Re: Topband: Testing for common mode noise (score: 1): Author: Don Kirk <wd8dsb@aol.com>; Date: Wed, 24 Aug 2011 07:00:23 -0400; Second, a common mode choke does not in any way degrade the signal nor the performance of the antenna. but after more offline discussions with Jim about a posting by W8JI warning that a improper valu; /archives//html/Topband/2011-08/msg00058.html (7,775 bytes)
6. Re: Topband: Testing for common mode noise (score: 1): Author: Guy Olinger K2AV <olinger@bellsouth.net>; Date: Wed, 24 Aug 2011 11:17:13 -0400; I would also add that many times a SINGLE choke will not work and can actually make things worse. This is because miscellaneous capacity to ground, or actual grounding may be already minimizing the c; /archives//html/Topband/2011-08/msg00062.html (9,170 bytes)
7. Re: Topband: Testing for common mode noise (score: 1): Author: Don Kirk <wd8dsb@aol.com>; Date: Thu, 25 Aug 2011 07:33:11 -0400; You won't believe what I found last night in the latest edition (5th edition) of the ON4UN Low-Band DXing book related to my proposed common mode noise test. Page 7-109 discusses using a battery powe; /archives//html/Topband/2011-08/msg00067.html (8,628 bytes)

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