John -
I've just looked at the spreadshet I sent you. Don't take too much
notice of the figures in it - I was playing about with Litz wire loops
obviously at the time that was saved. A Qu of 10000 certainly won't be
seen - but I wonder what the main mechanism that brings it down to the
actual Qu value of 400 is really is - probably capacitive coupling
between turns, that can be a Q killer.
Andy
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