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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 |
#2
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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
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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
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"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
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"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 |
#7
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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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