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Completely off-topic..... Always wanted to own a Geiger counter (I also want a table like the old cloud chamber the Science Museum in London had on display, now in their archive - I asked what happened to it), and an old /. article got me wondering what progress had been made on consumer devices. Seems that for about 90GBP you can have a key fob detector for X-Ray, Beta and Gamma rays, which will give you audio alert if normal background thresholds are exceeded, and some indication of potential exposure, and are sensitive enough to give directional information so you can make a swift exit in the appropriate direction if the source isn't obvious. Anyone ever try something like this? Anyone detected any unexpected sources of radiation. My guess, that whilst interesting, and possibly educational, it'll be unlikely to reduce exposure significantly.... Still thought I'd ask. Simon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq