On Thu, 27 Jun 2002, Benjamin Bromilow wrote: >> there is a boom. You use this at your own risk. Just in case you think of >> suing me, this is from an English 'little chemist' experiments book I >> bought second hand. I dates from about 1938 or so. Good luck *grin*. >> >> Peter > >Hey, I've still got my dad's old "Boys own book" from the 40s which shows >how to make a VanDeGraf generator, and make an Xray tube to connect to it. >It even shows how to make a phosphor plate so you can look at the bones in >your hand for hours on end using your new found toy. Nice huh?!! ;-) I collect old technical books. Not seriously (yet) but I buy whatever I can afford. How would a VanDeGraaff (sp?) power an X-ray tube ? The current would be too low I think. You piqued my interest here . I have been known to test Xrays from 100V line audio amps run w/o load. Those EL34s used to have green glow on the glass near the anode caps. The testing was not deliberate (intermittent 100V lines). Hehehe. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics