Russell McMahon paradise.net.nz> writes: > I don't think they mentioned efficiency. It can be quite good due to > resonance (aagh, the magic buzz word, kill it quickly, ...) . There is a different article on the web about the same demonstration that mentions efficiency 40%. It does not say whether it is transmission efficiency or over all. Peter P. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist