"William Sommerwerck"

In other words... If the driving frequency is high enough that the
capacitive reactance is essentially zero, then the net impedance is
essentially the ESR. Right?

** Errr - yep.

But it ain't that simple.

One has to examine the actual impedance curves for typical electros to see
what the game is - the curve is like no other kind of cap.

Think of Q factors of circa 0.05 and ESRs that way exceed the calculated
impedance at 100kHz.



...... Phil