At 12:06 AM 3/24/2005, you wrote: >Type 73 appears to be a good choice for HF, but I don't think >Fair-Rite Products produces it in toroid form. I think it's only >available in bead form or binocular cores. Yup, it looks like your right Mike. I see #77 material listed but not #73. Thanks, Danny, K6MHE