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61. Re: Topband: Noise cancellers performance (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Fri, 12 Sep 2008 16:13:59 -0600
Petr: I have used and reported on the MFJ-1026 [see www.k0to.us for information]. Last year I installed the NCC-1 with dual active verticals and was testing that. I did not use it to null noise becau
/archives//html/Topband/2008-09/msg00032.html (8,509 bytes)

62. Re: Topband: Topband trap dipole. Unadilla. (score: 1)
Author: "Tod -MN" <tod@k0to.us>
Date: Wed, 5 Nov 2008 22:25:22 -0700
-- _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband
/archives//html/Topband/2008-11/msg00052.html (8,721 bytes)

63. Topband: Topband Puzzle (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Sun, 7 Dec 2008 16:20:23 -0700
In the ARRL 160 meter Contest this year I used an antenna that I have experimented with off and on during 2008. It has a vertical element 57 feet high insulated from ground. The feed point is at the
/archives//html/Topband/2008-12/msg00072.html (9,077 bytes)

64. Re: Topband: Improving any 160m Contest (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Fri, 9 Jan 2009 16:56:07 -0700
I suggest a lot of discussion before making any changes to any existing 160m contest. The Third Law of Life says, "There are no solutions in life, only different sets of problems. You pick the proble
/archives//html/Topband/2009-01/msg00083.html (8,478 bytes)

65. Topband: MFJ-259B 'repair' (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Sat, 18 Apr 2009 12:29:33 -0600
I am planning to recalibrate and, if needed, repair my MFJ-259B. It may be that it has one or more bad bridge diodes. 1. Has anyone on this list recalibrated a unit of this type and, if so, would you
/archives//html/Topband/2009-04/msg00048.html (7,048 bytes)

66. Topband: MFJ repair (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Sat, 18 Apr 2009 21:30:02 -0600
My thanks to all who have sent me ideas so far. I have found a source for the diodes and had plenty of advice on doing the project. The URL that has been suggested by many was http://www.w8ji.com/mfj
/archives//html/Topband/2009-04/msg00049.html (6,697 bytes)

67. Re: Topband: MFJ 259B bridge diodes [HSMS2820] (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Sun, 19 Apr 2009 11:25:47 -0600
Several people have asked me where to find the RF bridge diodes. According to the PDF schematic I have of the MFJ-259B unit the RF diodes are HSMS2820 surface mount RF Schottky Barrier diodes. They a
/archives//html/Topband/2009-04/msg00050.html (8,425 bytes)

68. Topband: Additional MFJ-259B (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Wed, 22 Apr 2009 16:10:23 -0600
I have continued to work on the repair of my MFJ-259B and think I have found a way to determine by a set of simple measurements whether or not the diodes are blown as opposed to the unit simply being
/archives//html/Topband/2009-04/msg00067.html (7,582 bytes)

69. Topband: Application notes (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Sat, 2 May 2009 11:51:02 -0600
I know that there a number of fellows on Top Band using or planning to use the HP 8405A Vector Voltmeter for measurements. I have posted some HP application notes [written by HP not by me! ] that may
/archives//html/Topband/2009-05/msg00005.html (7,256 bytes)

70. Re: Topband: New moderator (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Thu, 16 Jul 2009 16:25:04 -0500
I have a great deal of respect for Bill's moderation of this reflector. As someone who had several posts 'delayed' over the years I never felt the 'delay' was arbitrary. I always felt that Bill was d
/archives//html/Topband/2009-07/msg00068.html (7,521 bytes)

71. Re: Topband: Noise Cancellation Options? (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Thu, 1 Oct 2009 08:10:14 -0600
Walt: One of the best ways to find the noise nulls is to reduce the signal values, both antenna and sense [aux] inputs, to very low values. Then look for the nulls. I wrote something about how to do
/archives//html/Topband/2009-10/msg00009.html (10,577 bytes)

72. Re: Topband: VERTICAL ANTENNA MATCHING (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Tue, 6 Oct 2009 22:47:25 -0600
I happen to have a top loaded vertical for 160 meters that is considerably shorter than 1/4 wave. I match this antenna by using a series coil followed by a shunt coil. The values in my specific case
/archives//html/Topband/2009-10/msg00100.html (8,769 bytes)

73. Re: Topband: VERTICAL ANTENNA MATCHING (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Thu, 8 Oct 2009 12:52:34 -0600
Tom: If you rearrange the diagram of your matching network you will see that a series coil to ground [ shunt 3 uH in your email] with the feed line attached at a point above ground is the same as the
/archives//html/Topband/2009-10/msg00117.html (9,669 bytes)

74. Re: Topband: 160m in RTTY Contests (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Wed, 28 Oct 2009 19:25:28 -0600
I would prefer that RTTY contesting not be initiated on 160m. I think all of the cogent reasons for me having that preference have already been expressed by others. My general feeling is that it will
/archives//html/Topband/2009-10/msg00381.html (10,820 bytes)

75. Re: Topband: overposting (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Mon, 9 Nov 2009 14:21:00 -0700
With no intention of being offensive to you Stan -- The saying is, "Nothing is impossible for the person who does not have to do it". A little mental effort and some polite reminders by members on th
/archives//html/Topband/2009-11/msg00276.html (8,048 bytes)

76. Topband: Noise (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Tue, 24 Nov 2009 12:48:37 -0700
For some folks on 160 noise reduction is of interest. I have placed a copy of a paper written for the LowDown [A LowFer magazine which I believe is no longer being published] some years ago, It used
/archives//html/Topband/2009-11/msg00402.html (7,086 bytes)

77. Topband: FW: Noise (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Thu, 26 Nov 2009 11:05:54 -0700
Hi Tod, I tested that one, It will work only if you have "that" type of noise. It is a kind of noise blanker for noise generated in main AC because of swithching applliences. It didn't work for me be
/archives//html/Topband/2009-11/msg00413.html (8,374 bytes)

78. Topband: Revised URL + comment on "Noise" (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Thu, 26 Nov 2009 12:14:07 -0700
I also placed the article on my web site because I thought it was 'out of print' and 'off the web'. I have since found that the article is available at the following familiar site: http://www.mods.dk
/archives//html/Topband/2009-11/msg00414.html (8,010 bytes)

79. Re: Topband: Noise (score: 1)
Author: "Tod - ID" <tod@k0to.us>
Date: Thu, 26 Nov 2009 13:06:17 -0700
Markus: The circuit does not require that the noise be on your power line -- in fact it is preferable that it is not on that line. What it does do is to use your power line to supply the 120 Hz clock
/archives//html/Topband/2009-11/msg00416.html (10,853 bytes)

80. Re: Topband: insulated vs:bare radial wires (score: 1)
Author: "Tod -ID" <tod@k0to.us>
Date: Fri, 4 Dec 2009 08:21:35 -0700
I guess I have the wrong idea about how the radials of a vertical work. For some reason I thought that they operated as a 'screen' that kept the return currents out of the ground enough so that the "
/archives//html/Topband/2009-12/msg00042.html (11,555 bytes)

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