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141. Re: Topband: Field Day (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Thu, 23 Jun 2005 16:38:53 -0500
You know it is too bad that 160 is out of the picture on FD. There are temporary antennas that can be placed. An L can go into the trees in about a half an hour with a compromised ground--but it wou
/archives//html/Topband/2005-06/msg00033.html (7,763 bytes)

142. Topband: Elevated vertical next to beverage (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Mon, 4 Jul 2005 18:39:06 -0500
I am installing an elevated 80M vertical next to my 160M 1wL beverage antenna (like within 75'). It's the only place I can locate it on the property that makes sense. Having played with other antenna
/archives//html/Topband/2005-07/msg00002.html (7,309 bytes)

143. Re: Topband: Reversible Beverage (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Thu, 15 Sep 2005 19:42:51 -0500
Mike, I'm not sure of where you got your design ideas. There is no doubt that there are a hundred ways to skin a cat. But it does appear that you have made the project more complex than it needs to
/archives//html/Topband/2005-09/msg00034.html (8,420 bytes)

144. Topband: Tuning elevated radials (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Thu, 15 Sep 2005 20:35:00 -0500
I'm working on building an elevated radial vertical. After installing the radials, I have a question about what I'm finding. Using a small toroid that I split in two, I wound 9 turns on each half, gl
/archives//html/Topband/2005-09/msg00035.html (8,697 bytes)

145. Re: Topband: Tuning elevated radials (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Fri, 16 Sep 2005 10:05:08 -0500
Gary, and others... My thinking has been that the characteristic null that is supposed to occur at zenith is a good thing. If nearby QRN arrives at a high angle, then the deep null at zenith should b
/archives//html/Topband/2005-09/msg00038.html (10,202 bytes)

146. Re: Topband: Tuning elevated radials (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Fri, 16 Sep 2005 13:47:19 -0500
...snip... Tom, Are you saying that a simple elevated radial system is 5 or 6 dB down from the classic 120 buried radials? This seems to run in conflict with things I've read elsewhere. Ford-N0FP for
/archives//html/Topband/2005-09/msg00041.html (8,409 bytes)

147. Re: Topband: Tuning elevated radials (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Sat, 17 Sep 2005 22:49:16 -0500
Tom, I think I see your point. From the limited experimentation I have done so far, I can assert that the ground topology at the site is very obviously varied. For example, one radial (the one that s
/archives//html/Topband/2005-09/msg00054.html (11,737 bytes)

148. Re: Topband: Low vertical and high inv-L (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Sun, 9 Oct 2005 12:54:10 -0500
Uli, In general, the hat wire on an inverted L will skew the pattern by a couple of dB. The pattern tends to favor the direction opposite the hat direction. So if the hat is running NW, the pattern w
/archives//html/Topband/2005-10/msg00038.html (8,671 bytes)

149. Topband: Engineering ?? @ relays (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 19 Oct 2005 01:44:54 -0500
I'm still on the hunt for a decent set of relays for a remote matching network. My goal? 1.5KW remote switching box. I went to a local surplus emporium in Minneapolis to scour the junque boxes for de
/archives//html/Topband/2005-10/msg00141.html (8,653 bytes)

150. Re: Topband: Moonlight & K-sums (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 19 Oct 2005 12:00:54 -0500
Bill, and others... What is interesting about October 17th has to do with what lore refers to as the "harvest moon." It happens once per year that a full moon appears on the eastern horizon at the ex
/archives//html/Topband/2005-10/msg00151.html (8,351 bytes)

151. Re: Topband: Moonlight & K-sums (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 19 Oct 2005 15:30:42 -0500
According to Wikipedia (http://en.wikipedia.org/wiki/Albedo), the electromagnetic reflectivity of the moon is 12%. I'm not sure what this has to do with Topband, the high correlation of good topband
/archives//html/Topband/2005-10/msg00154.html (9,635 bytes)

152. Re: Topband: Moonlight & K-sums (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 19 Oct 2005 16:05:09 -0500
Mike, Your reference gives native Americans as the source of the phrase. Ever heard of "Octoberfest?" They've been celebrating a harvest moon for many millenia. And it is the full moon that occurs d
/archives//html/Topband/2005-10/msg00155.html (9,256 bytes)

153. Re: Topband: Moonlight & K-sums (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 19 Oct 2005 23:18:41 -0500
I have a new explanation for the "Boring" reports in October. Chuck Hutton touched on it earlier today. If there is one thing most of us agree on, it is that the earth's magnetic field plays a signif
/archives//html/Topband/2005-10/msg00166.html (11,599 bytes)

154. Re: Topband: Engineering ?? @ relays (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Thu, 20 Oct 2005 11:30:20 -0500
Jos, and others... My quest for suitable relays continues. Many have suggested that I simply use vacuum devices. This bullet-proof approach would be the natural 'fix' to the problem of unreliable rel
/archives//html/Topband/2005-10/msg00176.html (9,661 bytes)

155. Topband: Relay Engineering Answers (final) (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Thu, 20 Oct 2005 23:16:33 -0500
I figured it out. And can provide some good engineering info regarding relay selection. Potter & Brumfield (Tyco) provides an excellent app note about relay selection. The application dictates what c
/archives//html/Topband/2005-10/msg00186.html (10,655 bytes)

156. Re: Topband: Engineering ?? @ relays (score: 1)
Author: "" <ford@cmgate.com>
Date: Mon, 24 Oct 2005 18:35:42 -0500
Eric, and others, This is what I suspect. However, the app note at Potter and Blumfield (Tyco) website indicated that "fine silver" contacts needed 400ma minimum. Yet the "Silver Alloy" relays they o
/archives//html/Topband/2005-10/msg00271.html (8,913 bytes)

157. Topband: Antenna Impedance vs efficiency (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Tue, 22 Nov 2005 21:43:49 -0600
Topbanders! The repository of all (ok most) knowledge about RF... Some time ago, I gave a seminar to the local radio club about SWR. To provide an illustration, I used a visual explanation including
/archives//html/Topband/2005-11/msg00275.html (8,059 bytes)

158. Topband: ARRL 160M Contest (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 23 Nov 2005 20:38:44 -0600
It's just around the corner folks. Dec 2 - Dec 4 is when all good Topbanders will be on and prowling the band. Everybody wants to work DX. Where's the DX? This year, I would like to see some pictures
/archives//html/Topband/2005-11/msg00297.html (6,817 bytes)

159. Re: Topband: Antenna Impedance vs efficiency (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Thu, 24 Nov 2005 10:00:05 -0600
...snip... Ken, and others... When I gave that seminar on SWR to the local club, my biggest concern was trying to provide a visual image of what is happening with a transmission line, reflections on
/archives//html/Topband/2005-11/msg00305.html (9,790 bytes)

160. Topband: Package from Salem OR (score: 1)
Author: "Ford Peterson" <ford@cmgate.com>
Date: Wed, 30 Nov 2005 12:36:09 -0600
A quick run to the mailbox today produced a nondescript package from Salem, OR. Lemmeessee... Christmas? Who the heck do I know in Salem? eBay maybe? A quick shake of the package--no rattle. Hmmmm. I
/archives//html/Topband/2005-11/msg00356.html (6,748 bytes)

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