The Lundahl that you mention at the recommended 15 mils dc would have a voltage drop of 36.

On most of our plate chokes we try to stay at or below 20 volt drop. Worse case that I can think of is our unit with a published dc current rating of 50 mils which has a dcr of approx 550 ohms which equates to a 27.5 volt drop and a dc copper loss (in watts) of 1.375.

Like Lundahl and many other manufacturers we do not publish Cw.

cheers,

msl