> Did you resonate them? > MUST be resonant if you care about range and efficiency For the quick 'n' easy first version, no. That it worked first time with a result that would suffice is most encouraging. Separation, consumption, and transfer are all within what I was looking for. A second, tuneable, version is under way --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .