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1. Topband: More 4S7NE Activity (score: 1): Author: "NX4D" <NX4D@comcast.net>; Date: Tue, 11 Nov 2008 13:23:28 -0500; Email from Nelson, 4S7NE: Hi Doug Very rarely we hear Ws on 160 yesterday was one such lucky day I am very happy that mysignal is going over there. Will look for you boys 2330 on ward on 1820 Khz dai; /archives//html/Topband/2008-11/msg00080.html (6,454 bytes)
2. Re: Topband: JA Recording (score: 1): Author: "NX4D" <NX4D@comcast.net>; Date: Tue, 24 Jul 2007 10:38:17 -0400; Good Morning Topbanders, Yesterday morning JL8GFB made a good recording of N4IS in S. Fla calling CQ on 1.814 mHz. It is at jl8gfb.com-sys.jp/recording/070723.n4is.html Add http:// to front of addres; /archives//html/Topband/2007-07/msg00031.html (6,682 bytes)
3. Topband: K6SE LEGACY (score: 1): Author: "NX4D" <NX4D@comcast.net>; Date: Mon, 30 Apr 2007 12:06:54 -0400; Earl, K6SE and Jose, EA3VY "invented" the Flag antenna. When I decided to build a W7IUV rotary Flag antenna, Earl was always happy to answer my questions, or discuss any aspect at length. In particul; /archives//html/Topband/2007-04/msg00154.html (7,194 bytes)
4. Topband: Kinstar AM Radio Station Antenna Design (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Thu, 25 May 2006 14:10:50 -0400; This answer may be too short. Build this antenna over a perfect radial field and the short answer may be correct. But for those making do with less than a perfect radial field, the Kinstar design co; /archives//html/Topband/2006-05/msg00061.html (8,497 bytes)
5. Re: Topband: QST Jun 06 RX Loop (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Wed, 17 May 2006 21:41:46 -0400; Place ferrite beads over the ends of the shield adjacent to the shield gap. You will now find that the shielded loop no longer receives anything. What happened to the shield's permeable magnetic cou; /archives//html/Topband/2006-05/msg00041.html (8,765 bytes)
6. Topband: QST Jun 06 RX Loop (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Mon, 15 May 2006 10:36:11 -0400; Before discovering the phased endfire loops for reception on 160m, I tried most kinds of loops known to man. In space, shielded and non-shielded loops work about the same. Near the ground, coupling; /archives//html/Topband/2006-05/msg00028.html (10,079 bytes)
7. Topband: Beverage terminator (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Mon, 21 Nov 2005 09:47:44 -0500; While I have no room for Beverages here, it has been interesting to study them and read the posts. One thing that keeps coming up is that the proper Beverage termination value changes, depending on; /archives//html/Topband/2005-11/msg00256.html (7,763 bytes)
8. Re: Topband: Ground parameter measurements (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Fri, 18 Nov 2005 14:17:15 -0500; Good point Earl. Any ground other than a metal plate is going to have varying levels of absorbtion loss and delay. 160m RF has been detected as deep as 40+ feet below ground surface. As it would be; /archives//html/Topband/2005-11/msg00226.html (8,475 bytes)
9. Re: Topband: Hello Doug (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Mon, 24 Oct 2005 11:32:01 -0400; Thanks infos Serge and Sebastien. I will forward this good news to the ham news media for those needing Mayotte on Topband. 73, Doug / NX4D TX0P DX'PEDITION: NOV 9 - DEC 7, 2005 Hello Doug Sebastien; /archives//html/Topband/2005-10/msg00255.html (7,093 bytes)
10. Re: Topband: High and low angles (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Sat, 5 Mar 2005 08:21:54 -0500; The vertical and inverted-V both radiate poorly at 40-45 elevation degrees. I would think that these radiation angles may be more useful than straight up. There are relatively unrecognized antennas; /archives//html/Topband/2005-03/msg00050.html (8,419 bytes)
11. RE: Topband: toploading of shunt fed tower (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Wed, 9 Feb 2005 12:11:08 -0500; Summation, the Force 12 C4XL on top of an elevated, insulated base, series fed Rohn 25 tower provides capacitive top loading equivalent to approximately 35 feet As additional info, F-12 states that t; /archives//html/Topband/2005-02/msg00121.html (7,776 bytes)
12. Re: Topband: Another DXpedition 160 Vertical Idea (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Fri, 28 Jan 2005 11:12:34 -0500; This comparison is dependent on the quality of the ground under and around the antennas. Up to half of the far field signal strength is derived from the ground reflected wave. If no ground radials a; /archives//html/Topband/2005-01/msg00312.html (9,286 bytes)
13. Re: Topband: Sunrise/Sunset Tables on the Internet (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Thu, 27 Jan 2005 12:12:40 -0500; If you go to: http://www.sunrisesunset.com/ one can see times for some US, Canadian and major world wide cities. Unfortunately, I do not think this website will allow one to select a non US city of c; /archives//html/Topband/2005-01/msg00302.html (8,088 bytes)
14. Re: Topband: Key-clicks FT1000MK-V field (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Wed, 19 Jan 2005 11:07:31 -0500; There are good alternatives to these radios. Buy the alternatives! Steer other hams away from Yaseu, and talk about their attitude on the air. Tell the ham vendors you aren't buying Yaseu, and why. I; /archives//html/Topband/2005-01/msg00236.html (11,140 bytes)
15. Topband: Re: S-meter (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Sat, 8 Jan 2005 12:07:33 -0500; My big wish is that we'd always do the S meter reality check..... I want to know just how strong my signals are... not an ego boost! I wish the equipment manufacturers would give us two S-meter selec; /archives//html/Topband/2005-01/msg00131.html (8,457 bytes)
16. Re: Topband: buried radial problems. (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Wed, 22 Dec 2004 14:43:41 -0500; In general, you want the radiation resistance to be large compared to the other two (or the other two to be small in comparison to the radiation resistance). With a short antenna, you make the radiat; /archives//html/Topband/2004-12/msg00281.html (9,656 bytes)
17. Re: Topband: Local noise environment (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Mon, 16 Feb 2004 14:38:06 -0500; At Buzz City, Florida, a 50 kVa line passes within one half mile of the house. When the summer air conditioner season begins, the power company throws in a capacitor bank, which corrects the power f; /archives//html/Topband/2004-02/msg00256.html (8,092 bytes)
18. Topband: K4OJ Update (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Thu, 12 Feb 2004 20:31:10 -0500; With sadness I pass this news to the Topband reflector: Doug / Nx4d Dear friends: In September of 2002 K4OJ sat at this computer and wrote a poignant obituary honoring his father, W1CW, who had died; /archives//html/Topband/2004-02/msg00202.html (7,326 bytes)
19. Re: Topband: BDR redux (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Fri, 6 Feb 2004 10:08:13 -0500; If all signals entering the antenna input of a receiver were weak signals, including noise, then receiver specs would be of little concern. Audio gain could be turned wide open for easy copy. Presie; /archives//html/Topband/2004-02/msg00107.html (11,277 bytes)
20. Re: Topband: BDR redux (score: 1): Author: "Doug Waller" <NX4D@comcast.net>; Date: Thu, 5 Feb 2004 19:17:38 -0500; The Orion sure sounds like a FB receive rig to me. I am still using the trusty FT-1000MP, but with some exciting modifications for topband reception. Using a SCAF-1 audio filter with two back-to-bac; /archives//html/Topband/2004-02/msg00092.html (10,065 bytes)

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