I built, and am experimenting with an EM resonator.  Its geometry is
based on the shape of a hyperbolic horn, the natural shape of a vortex in
water.  Please let me know if you have any insight into what is happening
inside this structure, when it is excited with RF.

   My work is documented here:


    Also, if you know of a simple circuit for measuring RF current, I am
all ears.  I would like to look for the "dip" in current which occurs when
it is excited at its resonant frequency.

Thank you,
Sean Logan

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