Re: Topband: Fw: WD-1 Wire impedance

[K1FZ-Bruce]

RF measured two different batches of the Plastic covered WD-1A   
wire. One was 130 ohms and the other was 150 ohms. 

Lot of hams use it for two wire beverages with good luck. 
 
1. Remember postings saying Beverage wire  size  could be very small 
if it could be physically supported. This
because the current on the wire is so small the loss is small. This 
wire does have some copper strands,  think it was four.. 


 
2. Then because the impedance is so low that almost any insulation is 
adequate. 
 
I put up a temporary beverage  4 or 5 years ago -(time flies)  My 
wire just running over the branches along a tree line- no insulators.. 
It was, yes I 'll say it again, 'temporary' for a few months but years 
later it is still working well. 
 
The wire is tough, made for war time use... It stands up well.. 
 
I do stay away from the old original  type with a lot of twist, as 
believe there is 'some' cancellation. (like as in twisted pair)

 
73
Bruce-k1fz
http://www.qsl.net/k1fz/beverage_antenna.html
 
 

On Mon, 10 Oct 2016 17:00:23 -0400, Herbert Schoenbohm  wrote:

  But believe the WD1A really works well at this QTH in both forward and
reverse modes. I have made many direct comparisons on extreme DX on 160
and the WD1A was the difference it too to hear the weak signal. My
tests on the VK0 and VP8 Dx-peditions with a 600 foot single wire
Beverage and the WD1A reversible configuration of the same length made
me a firm believe in the WD1A Beverage ability. Furthermore the WD1A is
cheap, strong, easy to construct just passing over limbs of small
trees. In fact it is so strong that when a deer (yes we have them here)
gets caught up in them the far end boxes, until I put in break away
jumpers, was the victim. 


On 10/10/2016 4:41 PM, Richard (Rick) Karlquist wrote:
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Hi Herb and all,
When I was in the Army, 1958 to 1960,, I was a "Field Communications 
Crewman". It meant, I helped string telephone wire. 
We used what was called WD-1TT. It was two separate conductors. They 
were twisted, not molded together. Each conductor was made of 3 
steel wires and 4 copper wires making a 7 strand conductor. It might 
have been 4 steel and 3 copper. 
I have never found listings for WD-1TT on eBay. We spliced it by 
stripping about 10 inches from each conductor and tying a square 
knot and twisting the loose end on the conductor and covering with 
friction tape and then Scotch electrical tape. We could run 3 
telephone circuits on 2 wires and ground with isolation transformers. 
Regards...Price W0RI


With steel being very lossy AND magnetic AND frequency
dependent, the characteristic impedance of this
stuff is likely to be complex and frequency varying. 
I don't see how it would ever work well for a
reversible beverage. 


Rick N6RK
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Re: Topband: Fw: WD-1 Wire impedance

[Mike Waters]

Hi Gary,

Thanks. This must be it. Hope it helps the OP.

win.i1wqrlinkradio.com/archive/OH2BEN_Reversible_
Beverage_Array-20-10-2007_04d.pdf

73, Mike
www.w0btu.com

On Mon, Oct 10, 2016 at 5:03 PM, kd9sv  wrote:

> Mike, do a search for "Killu" wire from Finland...the author claims the RF
> impedance of the Killu to be about 140-150 ohms and is basically a direct
> replacement for WD-1A as a reversible beverage wire.  That also agrees with
> my measurements here with the WD-1A wire.  73, de gary
>
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Re: Topband: Fw: WD-1 Wire impedance

[Mike Waters]

Sorry, that's not the correct thread. I'll have to find it later.
 It had to do with with a ham in Finland (?) who actually did some
measurements and may have posted them online.

73, Mike
www.w0btu.com

On Mon, Oct 10, 2016 at 4:52 PM, Mike Waters  wrote:

> Here is a thread from 7/23/12 that may answer this question. This URL is
> only one post in the thread. Follow it down from there.
> lists.contesting.com/pipermail/topband/2012-July/038223.html
>
> 73, Mike
> www.w0btu.com
>
> On Mon, Oct 10, 2016 at 1:24 PM, HAROLD SMITH JR 
> wrote:
>
>>
>> Some discussion of WD-1A on Google claims the impedance is 170 ohms and
>> other claim 70 ohms.
>>
>
>
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Re: Topband: Fw: WD-1 Wire impedance

[Mike Waters]

Here is a thread from 7/23/12 that may answer this question. This URL is
only one post in the thread. Follow it down from there.
lists.contesting.com/pipermail/topband/2012-July/038223.html

73, Mike
www.w0btu.com

On Mon, Oct 10, 2016 at 1:24 PM, HAROLD SMITH JR 
wrote:

>
> Some discussion of WD-1A on Google claims the impedance is 170 ohms and
> other claim 70 ohms.
>
_
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Re: Topband: Fw: WD-1 Wire impedance

[Herbert Schoenbohm]

But believe the WD1A really works well at this QTH in both forward and 
reverse modes.  I have made many direct comparisons on extreme DX on 160 
and the WD1A was the difference it too to hear the weak signal.  My 
tests on the VK0 and VP8 Dx-peditions with a 600 foot single wire 
Beverage and the WD1A reversible configuration of the same length made 
me a firm believe in the WD1A Beverage ability.  Furthermore the WD1A is 
cheap, strong, easy to construct just passing over limbs of small 
trees.  In fact it is so strong that when a deer (yes we have them here) 
gets caught up in them the far end boxes, until I put in break away 
jumpers, was the victim.



On 10/10/2016 4:41 PM, Richard (Rick) Karlquist wrote:
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Automatic Cleanup! (rich...@karlquist.com) Add cleanup rule 
 
| More info 
 


Hi Herb and all,
When I was in the Army, 1958 to 1960,, I was a "Field Communications 
Crewman". It meant, I helped string telephone wire.
We used what was called WD-1TT. It was two separate conductors. They 
were twisted, not molded together. Each conductor was made of 3 steel 
wires and 4 copper wires making a 7 strand conductor. It might have 
been 4 steel and 3 copper.
I have never found listings for WD-1TT on eBay. We spliced it by 
stripping about 10 inches from each conductor and tying a square knot 
and twisting the loose end on the conductor and covering with 
friction tape and then Scotch electrical tape. We could run 3 
telephone circuits on 2 wires and ground with isolation transformers.

Regards...Price  W0RI


With steel being very lossy AND magnetic AND frequency
dependent, the characteristic impedance of this
stuff is likely to be complex and frequency varying.
I don't see how it would ever work well for a
reversible beverage.

Rick N6RK
_
Topband Reflector Archives - http://www.contesting.com/_topband


_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Fw: WD-1 Wire impedance

[Richard (Rick) Karlquist]

Hi Herb and all,
When I was in the Army, 1958 to 1960,, I was a "Field Communications Crewman". 
It meant, I helped string telephone wire.
We used what was called WD-1TT. It was two separate conductors. They were 
twisted, not molded together. Each conductor was made of 3 steel wires and 4 
copper wires making a 7 strand conductor. It might have been 4 steel and 3 
copper.
I have never found listings for WD-1TT on eBay. We spliced it by stripping 
about 10 inches from each conductor and tying a square knot and twisting the 
loose end on the conductor and covering with friction tape and then Scotch 
electrical tape. We could run 3 telephone circuits on 2 wires and ground with 
isolation transformers.
Regards...Price  W0RI


With steel being very lossy AND magnetic AND frequency
dependent, the characteristic impedance of this
stuff is likely to be complex and frequency varying.
I don't see how it would ever work well for a
reversible beverage.

Rick N6RK
_
Topband Reflector Archives - http://www.contesting.com/_topband

Topband: Fw: WD-1 Wire impedance

[HAROLD SMITH JR]

- Forwarded Message -
 From: Herbert Schoenbohm 
 To: topband@contesting.com 
 Sent: Monday, October 10, 2016 11:54 AM
 Subject: Re: Topband: WD-1 Wire impedance
   
Some discussion of WD-1A on Google claims the impedance is 170 ohms and 
other claim 70 ohms.  I have 1/2 mile on a spool that I will measure 

> Herb Schoenbohm, KV4FZ


Hi Herb and all, 
When I was in the Army, 1958 to 1960,, I was a "Field Communications Crewman". 
It meant, I helped string telephone wire. 
We used what was called WD-1TT. It was two separate conductors. They were 
twisted, not molded together. Each conductor was made of 3 steel wires and 4 
copper wires making a 7 strand conductor. It might have been 4 steel and 3 
copper.
I have never found listings for WD-1TT on eBay. We spliced it by stripping 
about 10 inches from each conductor and tying a square knot and twisting the 
loose end on the conductor and covering with friction tape and then Scotch 
electrical tape. We could run 3 telephone circuits on 2 wires and ground with 
isolation transformers. 
Regards...Price  W0RI

   

   
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