Jim Kelley wrote:
I was
therefore surprised when you reported something other than a straight
line for the current amplitude along the radiator (let alone an increase
at some point).

Just proves that you are not omniscient. Such is the nature
of a real world inductance especially close to self-resonance.
This is just evidence of another failure of lumped inductance
models. The current through a real-world inductance is NOT
linear if the operating frequency is within 15% of the self-
resonant frequency. For the Nth time, please read and
understand the IEEE white paper at:

http://www.ttr.com/TELSIKS2001-MASTER-1.pdf
--
73, Cecil http://www.w5dxp.com