Cecil Moore wrote:

Jim Kelley wrote:

Cecil Moore wrote:
Which requires a lossless, non-radiating coil with zero capacitance.

Just out of curiosity, to which of those characteristics do you
attribute the phase delay?

Speed of light? :-)

The finite speed of light though a finite length of wire, yes.

Seems the primary cause of the phase delay would
be the capacitance.

With regard to coils, I think inductance is probably the more relevant
parameter. It's proportional to the number of turns and the length of
each turn of wire, and inversely proportional to the length of the
bobbin.

73, Jim AC6XG