Original poster: "Garry F. by way of Terry Fritz <twftesla-at-uswest-dot-net>" <garryfre-at-pacbell-dot-net> I have posted more pictures of my coil in operation at http://home.pacbell-dot-net/garryfre/ Three pictures show the blue sparks that result from taking a picture with low batteries. Quite an interesting effect. Hope ye like them.