AB7E wrote:
"(the process is useless if you only do it in one spot since as you say
it could be a current minimum)"
But the shield may have a traveling wave, either due to radiation or
nearby lossy objects, the latter especially for underground coax. Even a
partial traveling wave that includes some residual standing wave can
fill in current dips.
Here's a model of a traveling wave on coax feedline. I did this to model
a very long feedline. You just place a resistive load near the end.
Adjust the position and resistor value for flattest current.
I'm posting this link mainly because I was disappointed with the image
in my last post. It was supposed to be a bare image, not one embedded in
a page of stuff. Let's see if this image-hosting service renders just
the image:
https://iili.io/fPBFT9s.gif
If it looks good, the service is here:
https://freeimage.host/
If not, I'll try to find another.
Brian
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