[TowerTalk] 80M antenna wire size

[jimlux]

On 1/2/20 11:28 PM, David Gilbert wrote:
> 
> I'm using #18 solid Copperweld wire from Davis RF for my 160m Inverted-L 
> antenna.  It tarnished quickly to a dark brown and is virtually 
> invisible.  I'm not even sure I could spot it up in the air if it didn't 
> have some dacron line holding it up to tell me where it is.  The DC 
> resistance is negligible ... something like 0.05 ohms per meter, I think.

A 40 meter length at 0.05 ohm/meter is 2 ohms. On a vertical (which is 
what an inverted L is), with feedpoint impedance of 35 ohms, 2 ohms is 
about 6%, or a 0.3 dB loss? (huge assumptions here about uniform current 
distribution, AC resistance = DC resistance, etc.)



> 
> It's amazingly strong, too.
> 
> 73,
> Dave   AB7E
> 
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