Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz> Hi Ed, <snip> > For the record, the driver inductance is 13.6 mh, the resonator is 77 mh > and the measured driver/primary coupling factor is .482. > > Ed Wingate RATCB Have you measured the overall coupling for the whole system? If so, what is its value? Regards, malcolm