Owen Duffy wrote:
That didn't come out very clearly. As I understand it, Cecil argues that
there is substantial phase change in the forward and reflected wave
components when considering the helix as a transmission line.

Yes, and there's hardly any phase change in the resultant
standing wave when they are superposed because their
phasors are rotating in opposite directions at the same
angular velocity.
--
73, Cecil http://www.w5dxp.com