Original poster: "tesla by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla-at-paradise-dot-net.nz> Team Tried 2 to 3 turns of wire tight around the 1/4" tubing of the pri, series diode and sensitive DC meter. Works well as a relative indication of Pri RMS current. Just keep the meter and wire away from gnd of course as the whole entity is at HT. Rgds Ted L in NZ