Gene Fuller wrote:
Cecil Moore wrote:
"Through the coil" does NOT mean "through
the coil wire". It means "through the coil". You still uttered
a falsehood but I doubt that you will ever admit it.

You got me. I omitted the word "wire".

In that case, I apologize for jumping on you. The VF of
the coil is approximately double what it would be if
the current followed the wire. That's because of the
inter-winding interaction. But the magnetic fields
from coil#1 do not magically jump 10 inches to coil#100
as W8JI implies they do. His measurements are off by
a magnitude because he used standing-wave current for
his measurements. I suspect he actually measured less
than 3 ns "delay" but knew he couldn't afford to post
a faster-than-light measurement.
--
73, Cecil http://www.w5dxp.com