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References: [ +from:jhdmd@bellsouth.net: 114 ]

Total 114 documents matching your query.

1. Topband: Intrinsic impedance of free space (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Wed, 23 Nov 2005 19:52:06 -0500; Dear Ford, The intrinsic impedance of free space was described by the late (great) John Kraus (W8JK) in his book ELECTROMAGNETICS in 1952. He was a professor of electrical engineering at Ohio State U; /archives//html/Topband/2005-11/msg00295.html (9,202 bytes)
2. Topband: Adjusting termination resistance (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Wed, 28 Dec 2005 15:17:22 -0500; I use W8JI's technique for my K9AY loop system (homebrew). I use an SWR analyzer feeding a small amount of RF into the system, and adjust the termination resistance SWR for minimum at 1.830. I have a; /archives//html/Topband/2005-12/msg00366.html (7,564 bytes)
3. Topband: DX Enginerring Snap-on Ferrite Beads (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Thu, 17 Apr 2008 08:38:38 -0400; To those with shunt fed towers for Top Band, I have had up a 100 foot 45G tower since 1993. It is festooned with monobanders from 80 10 meters, and at the 30 foot level a larger bundle of Heliax, RG-; /archives//html/Topband/2008-04/msg00061.html (8,710 bytes)
4. Topband: Radial wire staples (score: 1): Author: "John Harden" <jhdmd@bellsouth.net>; Date: Sat, 10 May 2008 09:50:19 -0400; Home Depot has "sod staples" in packs of 75 for only $10.30 per pack. They are 1" wide and 6 inches long. This sounds like a really good deal. http://www.homedepot.com/webapp/wcs/stores/servlet/Produ; /archives//html/Topband/2008-05/msg00029.html (6,645 bytes)
5. Topband: Receivers (score: 1): Author: "John Harden" <jhdmd@bellsouth.net>; Date: Sun, 11 May 2008 20:43:00 -0400; Dear Top-Banders, I read AA7JV's article on transceivers. It was most interesting to see his comments. I am not surprised to see that he thinks that the K3 is the best of the lot he has tried. I have; /archives//html/Topband/2008-05/msg00032.html (7,661 bytes)
6. Topband: Outdoor coax and connectors (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Tue, 20 May 2008 13:45:05 -0400; Dear all, I have converted over to RG-6/U Quad shield from Home Depot. It is cheap & low loss. I have also converted over to the F connector. I use waterproof F connectors with a compression tool fro; /archives//html/Topband/2008-05/msg00055.html (6,941 bytes)
7. Topband: Lightening (score: 1): Author: "John Harden" <jhdmd@bellsouth.net>; Date: Sun, 15 Jun 2008 10:42:30 -0400; Dear all, I have been at this QTH since 1985 and have had two strikes that bled into the shack. These were times that I FORGOT to disconnect all incoming lines. I utilize multiple ICE arrestors and t; /archives//html/Topband/2008-06/msg00024.html (7,168 bytes)
8. Topband: BA rigs on 160 (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Sat, 28 Jun 2008 11:01:13 -0400; Two top notch BA rigs for 160 are the Viking Ranger and the Viking Valiant. Their keying is excellent! They both utilize vacuum tube keying via a 12AU7 keyer tube. The keying bias is adjustable with; /archives//html/Topband/2008-06/msg00073.html (6,607 bytes)
9. Topband: Power levels on 160 (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Tue, 1 Jul 2008 07:27:33 -0400; I really enjoyed hearing the various viewpoints on 160 operation, and the required power levels necessary for consistent communication. If you are trying to work DX on 160 (and to do it consistently); /archives//html/Topband/2008-07/msg00001.html (7,311 bytes)
10. Topband: Noise reduction (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Fri, 12 Sep 2008 16:55:45 -0400; There was a recent posting about the various noise reduction devices. The GAP in-line DSP noise canceling device works great ahead of my Ten-Tec Orion I. In fact I seldom use the rig without it. I wa; /archives//html/Topband/2008-09/msg00031.html (7,407 bytes)
11. Topband: Inverted U (score: 1): Author: "John Harden" <jhdmd@bellsouth.net>; Date: Wed, 26 Nov 2008 02:07:00 -0500; I used the inverted U for many years. Mine went up 60 feet or so, went horizontal for about 100 feet & down 60 feet. It had a ground radial system at each end. The far end was grounded and the near e; /archives//html/Topband/2008-11/msg00226.html (7,276 bytes)
12. Topband: 160 receive antennas (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Mon, 22 Dec 2008 05:50:31 -0500; Dear all, I've been confined (but not incarcerated) to a 1 acre city lot in Atlanta since 1985. I have rotateable antennas from 80 - 10 meters and have no problems on those bands. However, 160 has al; /archives//html/Topband/2008-12/msg00194.html (7,620 bytes)
13. Topband: Coax (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Tue, 20 Jan 2009 07:37:53 -0500; For receive I use RG-6/U quad shield from Home Depot. As I recall a 500 foot roll costs between $50 and $100 (closer to $50). It works great. I use RG-213/U for XMIT as my runs are less than 100 feet; /archives//html/Topband/2009-01/msg00197.html (6,815 bytes)
14. Topband: Glorioso & Midway (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Wed, 21 Oct 2009 10:50:49 -0400; It's been very interesting to hear all of the comments relative to the two recent DXpeditions. I was fortunate to be able to work K4M on 160 from a 1 acre city lot in Atlanta. I did use a 100 foot 45; /archives//html/Topband/2009-10/msg00270.html (7,547 bytes)
15. Topband: TX3 (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Mon, 09 Nov 2009 12:35:42 -0500; I got the TX3 on 160 this morning well after sunrise at 7:05 am EST. He came right out of the noise with a good signal here in Atlanta, GA. I used my new shunt fed Rohn 45G 100 foot tower with 32 rad; /archives//html/Topband/2009-11/msg00268.html (6,746 bytes)
16. Topband: Radials and shunt-fed tower (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Fri, 18 Dec 2009 05:48:22 -0500; I been reading all of the chatter about the radial issue. I have a 100 foot 45G guyed tower (3 sets of guys broken every 20 feet with large Rohn insulators). It has 32 radials and is shunt fed with a; /archives//html/Topband/2009-12/msg00211.html (7,951 bytes)
17. Topband: 160 receive antennas (score: 1): Author: "John Harden" <jhdmd@bellsouth.net>; Date: Sat, 2 Jan 2010 11:56:14 -0500; I have tried just about everything on my 1 acre city lot in Atlanta. However, the best antennas by far that I have tried are short beverages. I use a 240 foot DX Engineering reversible beverage for N; /archives//html/Topband/2010-01/msg00027.html (7,716 bytes)
18. Topband: 160 Dinner on Friday Night (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Mon, 10 May 2010 06:44:57 -0400; If any of you top banders need a ride to the dinner I'll be staying at the Crown Plaza. I have a SUV rented and can take several people with me. 73, John Harden, W4NU K4JAG (1959 to 1998) ___________; /archives//html/Topband/2010-05/msg00026.html (6,346 bytes)
19. Topband: 160 this morning in Atlanta (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Tue, 31 Aug 2010 12:25:12 -0400; This morning around sunrise I had a chance to try out my recently erected "Triangle Array" from Hi-Z Antennas in Oregon. It works fantastic. It has 6 receive directions and is equal to having six 500; /archives//html/Topband/2010-08/msg00067.html (7,244 bytes)
20. Topband: Shunt fed tower (score: 1): Author: "John Harden, D.M.D." <jhdmd@bellsouth.net>; Date: Sun, 3 Oct 2010 11:46:06 -0400; Interesting to see all of the comments about feeding a vertical antenna.... I use a 100 foot 45G tower with a shunt feed for top band. Because the tower is festooned with rotary antennas for 80 - 1-0; /archives//html/Topband/2010-10/msg00016.html (6,961 bytes)

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