Jim Kelley wrote:

Cecil Moore wrote:
Sorry, I'm a little handicapped since I have never seen
"Figure 7-19" and it has been removed from the web site.

I have the file. It's 7.5 megabytes. Do you have a broadband connection?

Yes, I have DSL but I also have the 3rd edition of "Antennas".
I think "Figure 8-32: Relative phase velocity p for different
pitch angles as a function of the helix circumference, C(lamda),
for the condition of in-phase fields in the axial direction",
is probably the same graph as Figure 7-19 in the 1st edition.
I'm assuming that the "relative phase velocity" is the same
thing as the VF of the coil.
--
73, Cecil, w5dxp.com