Tom Donaly wrote:
Actually, I just wanted to calculate the values for my own personal
edification. You'll have to do the arithmetic yourself, Cecil, and
then it won't mean much, because, as far as I know, no one has ever
done any experimental work to see if these equations have any meaning.

There are references for it in the Dr. Corum IEEE paper.
Kandoian and Sichak, "Wide Frequency Range Tuned Helical
Antennas and Circuits," Electrical Communications, Vol 30,
1953, pp. 294-299. It was published while I was in high
school.

If a coil can slow down an electromagnetic wave as much as these
equations say it can, though, it qualifies as a very interesting device.

I studied such 50 years ago at Texas A&M from papers
such as the above. The parameters for a transmission line
or a coil are the same just with different values.
--
73, Cecil http://www.qsl.net/w5dxp