Got to keep them off balance ... A rather good idea if it works. Cross coupling energy from the outputs of adjacent magnetrons allows very large arrays thereof (100+) to be phase synchronised thereby allowing coherent output for eg "energy weapon systems". Patent: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220060208672%22.PGNR.&OS=DN/20060208672&RS=DN/20060208672 New Scientist reference: http://www.newscientisttech.com/article/dn10356?DCMP=NLC-nletter&nsref=dn10356 The provided redundancy and low unit cost due to existing economies of scale may make this method attractive for other applications. Perhaps. Quick skim of patent application makes it clear that they are very firmly standing on the shoulders of others who have already claimed to have achieved similar things. Also: IPOD wake up on finger. Aircraft nitrogen fuel tank passivation / pressurisation using (much filtered) engine exhaust. Russell.. . -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist