Cecil Moore wrote:
Michael Coslo wrote:
Just a little thought experiment.

Something else that I have wondered about:
Given a threaded rod with about double the surface
area of a piece of tubing, does the VF decrease?
Can a threaded rod be used to decrease the length
of a resonant vertical?

to the extent that the current is on the peaks of the threads.. in the
limit it would be like a helically loaded antenna or that funky delay
line coax with the spiral core? It would be complex to analyze, but gut
feel is no.. the threads aren't tall and skinny enough in the run of the
mill threaded rod.