[PPRAANet] Eddy current article question, copy attached

[GEORGE W SHAIFFER]

[https://res-h3.public.cdn.office.net/assets/mail/file-icon/png/docx_16x16.png]Eddy Current - Skin, and Proximity Effects.docx<https://1drv.ms/w/s!AhxdswHfx62xmHNEy8FfYIQe4cXq>

In the article attached above the author(s) use the term AC resistance along with the term DC resistance.
I had always considered AC resistance as an impedance at zero-degree phase angle.  Is this the AC resistance
being discussed in this article?  Not sure if it really matters but I am curious.  One of the best explanations of eddy
current I have seen, most text mention it but that is about all.  I will need a mat program or ,calculator program to assist
me with math.  The drawing of transformer secondary being wound over a complete primary vs putting on
interleaved layers on primary and secondary windings is interesting. I knew it was sometimes done, but not sure why other
than to increase the magnetic coupling between the windings.

  George KE0QCC