[TowerTalk] 80M antenna wire size

[Wes]

This can be modeled in EZNEC to remove some of the assumptions.  A/B test with 
copper then steel for the material.

Wes  N7WS

On 1/3/2020 6:36 AM, jimlux wrote:
> 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