[TowerTalk] KF4BWG

[jimlux]

On 4/18/19 5:46 PM, David Gilbert wrote:
> 
> I was more concerned about the proximity effect in the horse fence 
> scenario ... 1.5 inches wide with eighteen 7 mil wires.  I suspect that 
> is still "close-ish", which would make my calculations somewhat off ... 
> although I suspect there might be an influence on "close-ish" that was a 
> function of the magnetic permeability.
> 
> It's a complicated world ...   ;)
> 
> Dave   AB7E


the high permeability makes the skin depth small, which increases the AC 
resistance - not great when it's SS, which already has high bulk 
resistivity.


1.5/18 means the wires are about 83 mils apart.

OTOH, lots of folks are perfectly happy with the terminated folded 
dipole made of stainless steel which has about 6dB of loss, and 
therefore provides a decent match over a wide, wide band with no tuner.

For a lot of applications, either there's a propagation path or there 
isn't and optimizing the beginning and end of the band opening isn't 
relevant.