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 rigid support. It does fairly
well but have no way to compare it to a single wire in that
)
6. Re: WD1A wire (ZR)
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Message: 1
Date: Wed, 28 Aug 2013 12:32:07 -0700 (PDT)
From: Larry Molitor w7...@yahoo.com
To: topband@contesting.com topband@contesting.com
Subject: Topband: WD1A wire
Message-ID
-
From: Larry Molitor w7...@yahoo.com
To: topband@contesting.com
Sent: Wednesday, August 28, 2013 3:32 PM
Subject: Topband: WD1A wire
Anyone know of a good source for WD1A field phone wire these days?
Best I've found so far runs abut 60 bux shipped to WA for a 0.5 km spool.
Thanks,
Larry
)
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Message: 1
Date: Wed, 28 Aug 2013 12:32:07 -0700 (PDT)
From: Larry Molitor w7...@yahoo.com
To: topband@contesting.com topband@contesting.com
Subject: Topband: WD1A wire
Message-ID: 1377718327.441.yahoomail...@web126202.mail.ne1.yahoo.com
12:32:07 -0700 (PDT)
From: Larry Molitor w7...@yahoo.com
To: topband@contesting.com topband@contesting.com
Subject: Topband: WD1A wire
Message-ID: 1377718327.441.yahoomail...@web126202.mail.ne1.yahoo.com
Content-Type: text/plain; charset=us-ascii
Anyone know of a good source for WD1A
Anyone know of a good source for WD1A field phone wire these days?
Best I've found so far runs abut 60 bux shipped to WA for a 0.5 km spool.
Thanks,
Larry - W7IUV
_
Topband Reflector
Larry try eBay that is where I bought my last 2500 feet for 28 bucks but
be sure to not get it tangled as that is a mess or long runs.
Herb Schoenbohm, KV4FZ
On 8/28/2013 3:32 PM, Larry Molitor wrote:
Anyone know of a good source for WD1A field phone wire these days?
Best I've found
...@jeremy.mv.com
To: Larry Molitor w7...@yahoo.com; topband@contesting.com
Sent: Wednesday, August 28, 2013 1:26 PM
Subject: Re: Topband: WD1A wire
The last reel I bought was 2.5km for $40 plus about $20 shipping from Ohio
about 3-4 years ago on Fleabay. It was listed strangely but I forget how
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 units move, the
wire is recovered and reused. For longer term strategic installations
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.
Surely someone somewhere has made some reasonable attempt at characterizing
the line.
73 Tom
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 diameter
(averaged), .0685 spacing. The dielectric constant of the insulation
(polyethylene) is
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 diameter
(averaged), .0685 spacing. The dielectric constant of the insulation
(polyethylene) is
On 7/23/2012 6:43 AM, Tom W8JI wrote:
Surely someone somewhere has made some reasonable attempt at characterizing
the line.
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
-Original Message-
From: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
On Behalf Of Mike Waters
Sent: Monday, July 23, 2012 10:13 AM
To: topband
Subject: Re: Topband: WD1A
I think the characteristics of so-called WD-1 surplus phone line varies.
FWIW, the two short samples
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 seemed to me to be made of
the same stuff as household zip cord. I reported my findings back to
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 diameter and spacing
(.033 diameter and .0685 center-to-center spacing.) The same math says it's
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 diameter and spacing
(.033 diameter and .0685 center-to-center spacing.) The same math says
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 problem. I tried the email he used
to make the post several times but no response. Has anyone
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