Art, KB9MZ wrote:
"I now see that a floating coax shield would be ineffective as a screen
since it would not discriminate.."

Art is in agreement with King, Mimno, and Wing on this. They say on page
235 of "Transmission Lines, Antennas, and Wave Guides:

"The operation of the shielded loop is explained popularly by first
stating that the desired loop current is due to the magnetic field, the
undesired up-and-down current to the electric field, and then
maintaining that the metal shield cannot be penetrated by the electric
field but can be penetrated by the magnetic field. All these statements
are incorrect in light of fundamental electromagnetic principles."

Ever have an open coax shield connection only at one end of the cable?
Wasn`t the screening vitiated? I don`t want to argue with (3) Ph.D.`s.

Best regards, Richard Harrison, KB5WZI