Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz> Hi all, My sincere thanks to Kevin and the team for producing the coil and movie. It is a fine effort. I would love to see what would happen if a considerably bigger topload was placed on top of the existing one with more primary L to maintain tune. Regards, Malcolm