-ex- wrote:

In practice the coil Q is determined primarily by the form dielectric,
wire size, wire spacing, diameter/length ratio/neary coupling effects,
etc. R is far enough down the list that its generally not even
considered.

Ah, so the voltage drop across the coil (due to the small internal
resistance) and the close proximity of the wires give it some
capacitance? Does this affect performance or just screw add unwanted
capacitance?

Wouldn't adding space between wires cause some eddy currents and lower
the L of the coil?

Does wire coating make a difference regarding the dielectric? Or is it
another capacitance-altering effect?

Thanks again!
Dave