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Old June 24th 04, 04:55 AM
I buy Marklin trains
 
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Default Heavy Duty Antenna Wire, For Sale on ebay

I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill

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Old June 24th 04, 01:06 PM
Fractenna
 
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Default

I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill


Bill,

The claims you make about this wire don't sound right.

Stranded wire does emulate a conductor with the same, or slightly larger,
diameter. However, the increased, self-shielding surface area is very prone to
oxidation via mositure. Ergo the conductivity decreases somewhat over time. You
compare to #14 wire, which is fairly thin in this application. Perhaps you
should compare to a solid conductor of the same diameter, such as #10?

Stranded wire is used on LF and VLF transmitters because it is economically
impractical to make wire with very wide diameters. However, it is not the
STRANDING of the wire that's important, per se, but the overall diameter.

It's a good product, but the reasons you state for buying it don't make sense
to me. Perhaps you have some data that shows superior gain and bandwidth of
stranded copper compared to regular copper of the same diameter? I am not
familiar with any measurable differences in the apps you target. Kindly fill us
in if I am wrong.

I fear your potential buyers might assume substantial increases in gain and
bandwidth from your comments on the description, when, in fact, little benefit
, if any, is attained.

73,
Chip N1IR
  #3   Report Post  
Old June 24th 04, 01:06 PM
Fractenna
 
Posts: n/a
Default

I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill


Bill,

The claims you make about this wire don't sound right.

Stranded wire does emulate a conductor with the same, or slightly larger,
diameter. However, the increased, self-shielding surface area is very prone to
oxidation via mositure. Ergo the conductivity decreases somewhat over time. You
compare to #14 wire, which is fairly thin in this application. Perhaps you
should compare to a solid conductor of the same diameter, such as #10?

Stranded wire is used on LF and VLF transmitters because it is economically
impractical to make wire with very wide diameters. However, it is not the
STRANDING of the wire that's important, per se, but the overall diameter.

It's a good product, but the reasons you state for buying it don't make sense
to me. Perhaps you have some data that shows superior gain and bandwidth of
stranded copper compared to regular copper of the same diameter? I am not
familiar with any measurable differences in the apps you target. Kindly fill us
in if I am wrong.

I fear your potential buyers might assume substantial increases in gain and
bandwidth from your comments on the description, when, in fact, little benefit
, if any, is attained.

73,
Chip N1IR
  #4   Report Post  
Old June 24th 04, 02:32 PM
Reg Edwards
 
Posts: n/a
Default


"Fractenna" wrote in message
...
I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill


Bill,

The claims you make about this wire don't sound right.

Stranded wire does emulate a conductor with the same, or slightly larger,
diameter. However, the increased, self-shielding surface area is very

prone to
oxidation via mositure. Ergo the conductivity decreases somewhat over

time. You
compare to #14 wire, which is fairly thin in this application. Perhaps you
should compare to a solid conductor of the same diameter, such as #10?

Stranded wire is used on LF and VLF transmitters because it is

economically
impractical to make wire with very wide diameters. However, it is not the
STRANDING of the wire that's important, per se, but the overall diameter.

It's a good product, but the reasons you state for buying it don't make

sense
to me. Perhaps you have some data that shows superior gain and bandwidth

of
stranded copper compared to regular copper of the same diameter? I am not
familiar with any measurable differences in the apps you target. Kindly

fill us
in if I am wrong.

I fear your potential buyers might assume substantial increases in gain

and
bandwidth from your comments on the description, when, in fact, little

benefit
, if any, is attained.

73,
Chip N1IR


==================================

Sranded wire is also used because it is flexible and easier to erect.

But stranded wire of the same diameter has a somewhat higher HF resistance.
As usual it is skin effect.

Current tends to flow only on the extreme outermost surfaces of the strands.
So the surface area is less than the surface area of a solid wire of the
same overall diameter. The fewer the number of strands the greater the
effect. Imagine where the current flows with only two strands. There is
also the very minor effect of spiralling.

But continue to use stranded wire for its undoubted superior mechanical
properties. If its HF resistance is too high then increase its diameter -
just as is done with the solid stuff. The loss or gain in S-units per lb
weight per mile is not worth the bother of consideration.
----
Reg, G4FGQ


  #5   Report Post  
Old June 24th 04, 02:32 PM
Reg Edwards
 
Posts: n/a
Default


"Fractenna" wrote in message
...
I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill


Bill,

The claims you make about this wire don't sound right.

Stranded wire does emulate a conductor with the same, or slightly larger,
diameter. However, the increased, self-shielding surface area is very

prone to
oxidation via mositure. Ergo the conductivity decreases somewhat over

time. You
compare to #14 wire, which is fairly thin in this application. Perhaps you
should compare to a solid conductor of the same diameter, such as #10?

Stranded wire is used on LF and VLF transmitters because it is

economically
impractical to make wire with very wide diameters. However, it is not the
STRANDING of the wire that's important, per se, but the overall diameter.

It's a good product, but the reasons you state for buying it don't make

sense
to me. Perhaps you have some data that shows superior gain and bandwidth

of
stranded copper compared to regular copper of the same diameter? I am not
familiar with any measurable differences in the apps you target. Kindly

fill us
in if I am wrong.

I fear your potential buyers might assume substantial increases in gain

and
bandwidth from your comments on the description, when, in fact, little

benefit
, if any, is attained.

73,
Chip N1IR


==================================

Sranded wire is also used because it is flexible and easier to erect.

But stranded wire of the same diameter has a somewhat higher HF resistance.
As usual it is skin effect.

Current tends to flow only on the extreme outermost surfaces of the strands.
So the surface area is less than the surface area of a solid wire of the
same overall diameter. The fewer the number of strands the greater the
effect. Imagine where the current flows with only two strands. There is
also the very minor effect of spiralling.

But continue to use stranded wire for its undoubted superior mechanical
properties. If its HF resistance is too high then increase its diameter -
just as is done with the solid stuff. The loss or gain in S-units per lb
weight per mile is not worth the bother of consideration.
----
Reg, G4FGQ




  #6   Report Post  
Old June 24th 04, 04:52 PM
Bob Miller
 
Posts: n/a
Default

On 23 Jun 2004 20:55:26 -0700, (I buy Marklin
trains) wrote:

I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill


What guage is the stuff? All you say is it's 1/8-inch thick. I
normally don't buy wire by thickness, but by guage.

Also, is it 100% copper? Or some combination of copper and steel?

thanks,

bob
k5qwg



  #7   Report Post  
Old June 24th 04, 04:52 PM
Bob Miller
 
Posts: n/a
Default

On 23 Jun 2004 20:55:26 -0700, (I buy Marklin
trains) wrote:

I have listed 5 lots of NEW heavy duty antenna wire on ebay.

Please cleck on this link to see the listings and pictu
http://search.ebay.com/heavy-duty-an...sortpropertyZ1

I ship worldwide.

Thanks,

Bill


What guage is the stuff? All you say is it's 1/8-inch thick. I
normally don't buy wire by thickness, but by guage.

Also, is it 100% copper? Or some combination of copper and steel?

thanks,

bob
k5qwg





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