>>I want someone to invent a new product. It searches out >>the local >>cell phone transactions and inserts an annoying 'whine" >>into their >>conversations. > I dunno- a little spark gap generator in ones pocket > should create enough > interference such that the phone cannot hear the base > anymore should do it. A 2 kW 27 MHz single tube self oscillating plastic welder, with a little help from a 1/4 wave whip taped on the wall works wonders for stereos played at full volume night after night at 2am. Ask me how I know :-). (Not my apartment - I just provided the plastic welder.) But, it would be a mite hard to fit that rig in your pocket. In a panel van, no problem, even including the 5 kVA gen set. Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist