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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+WD1A\s*$/: 15 ]

Total 15 documents matching your query.

1. Topband: WD1A (score: 1)
Author: Craig Clark <jcclark@wildblue.net>
Date: Mon, 10 Dec 2007 10:45:21 -0500
WD1A Mil Spec mil-c-49104 (CR) 7 strand .011 diameter, four copper, three steel. 170 pound breaking strength 73, Craig Clark, K1QX RADIOWARE AND RADIO BOOKSTORE PO BOX 209 RINDGE NH 03461 603 899 695
/archives//html/Topband/2007-12/msg00091.html (6,190 bytes)

2. Topband: WD1A (score: 1)
Author: "Mike Greenway" <K4PI@BELLSOUTH.NET>
Date: Sat, 12 Feb 2011 19:38:05 -0500
I wonder if anyone knows how to reach W5UN? He made a post concerning his problems with WD1A breaking inside the insulation and was wanting to find out if he thought it was a corrosion or tension pro
/archives//html/Topband/2011-02/msg00137.html (6,416 bytes)

3. Re: Topband: WD1A (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Sun, 13 Feb 2011 07:31:38 -0500
I have not had any problems with WD1A but those steel strands which give it strength will rust quickly and eventually break if water gets to them. Seal the ends so water cannot get in! I put crimp c
/archives//html/Topband/2011-02/msg00139.html (6,945 bytes)

4. Topband: WD1A (score: 1)
Author: "Craig Clark" <jcclark@myfairpoint.net>
Date: Mon, 23 Jul 2012 09:05:17 -0400
There are no perfect solutions for Beverage wire and all have problems. Military commo wire is normally used in short term tactical telephone systems and sees usage from a few days to a few weeks. As
/archives//html/Topband/2012-07/msg00280.html (7,694 bytes)

5. Re: Topband: WD1A (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Mon, 23 Jul 2012 09:43:55 -0400
Has anyone ever made any attempt to characterize the line at HF? A simple process like that would eliminate all speculation about RF performance, and make rational cost vs. performance decisions. Sur
/archives//html/Topband/2012-07/msg00281.html (7,075 bytes)

6. Re: Topband: WD1A (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Mon, 23 Jul 2012 09:12:35 -0500
I think the characteristics of so-called WD-1 surplus phone line varies. FWIW, the two short samples of WD-1 that I have here are as follows: 115 ohms impedance, calculated from the following: .033 d
/archives//html/Topband/2012-07/msg00284.html (7,627 bytes)

7. Re: Topband: WD1A (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Mon, 23 Jul 2012 10:47:05 -0400
By sweeping it with a carbon 250 ohm pot on one end, and a SWR meter on the other, we can find a resistance value that results in minimal SWR change. Then, by measuring pot resistance with a ohmmete
/archives//html/Topband/2012-07/msg00289.html (8,157 bytes)

8. Re: Topband: WD1A (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Mon, 23 Jul 2012 10:00:48 -0700
If I had a sample (which I don't), I would hook it up to a VNA and measure both Zo and attenuation. 73, Jim K9YC _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2012-07/msg00293.html (7,230 bytes)

9. Re: Topband: WD1A (score: 1)
Author: "Milt -- N5IA" <n5ia@zia-connection.com>
Date: Mon, 23 Jul 2012 11:26:51 -0700
Jim, Send to me direct, off line, your address and I will send you a sample, whatever reasonable length you need to perform the test. If you respond quickly, I can get it in the PO today. Milt, N5IA
/archives//html/Topband/2012-07/msg00295.html (8,248 bytes)

10. Re: Topband: WD1A (score: 1)
Author: "kd9sv" <kd9sv@comcast.net>
Date: Mon, 23 Jul 2012 14:49:28 -0400
Mike, the measurements I took here on a short (300ft) WD-1A with average height of 5ft using the method W8JI recommends with a termination resistor (pot) and MFJ-259 showed an impedance of 140 ohms o
/archives//html/Topband/2012-07/msg00298.html (8,322 bytes)

11. Re: Topband: WD1A (score: 1)
Author: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Mon, 23 Jul 2012 15:40:28 -0400
That's what I would like to hear. Back some years got ahold of a sample of some alleged high power 72 ohm transmission line before I bought a bunch of it. It was 80 ohms and had terrible losses. It s
/archives//html/Topband/2012-07/msg00299.html (7,925 bytes)

12. Re: Topband: WD1A (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Mon, 23 Jul 2012 16:41:26 -0500
Gary, was your 140 ohm WD-1A made from .0393 (1mm) diameter wires, spaced .118 center-to-center? My math says that should be a little over 140 ohms. But the stuff I was talking about was a different
/archives//html/Topband/2012-07/msg00304.html (8,344 bytes)

13. Re: Topband: WD1A (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Mon, 23 Jul 2012 19:36:32 -0400
Since the field extends outside the dielectric, all bets are off. Even if the strongest area of electric field is between the conductors, we really don't know the percentages of what dielectric are
/archives//html/Topband/2012-07/msg00307.html (8,928 bytes)

14. Re: Topband: WD1A (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Mon, 23 Jul 2012 18:50:52 -0500
Tom, I realized that the field extends beyond the dielectric into the air, and so I played with lower values of permittivity to see how much changing that would affect the results. But you are certai
/archives//html/Topband/2012-07/msg00309.html (9,396 bytes)

15. Re: Topband: WD1A (score: 1)
Author: "Mike Greenway" <K4PI@BELLSOUTH.NET>
Date: Sun, 7 Jun 2015 13:39:22 -0400
Hi Roger, I use a 800 ft bi directional beverage using the WD1A wire. I am using the transformers sold by KD9SV to feed and terminate it. I use some small nylon cord to help support it between each r
/archives//html/Topband/2015-06/msg00034.html (6,767 bytes)

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