Testing Fiesta Ware (Uranium Oxide) Hot samples with SBM20 and DIY Geiger Counter and getting 11820 CPM! The samples was purchased from sciencefare (search him on eBay with query: "Geiger Counter Test Source"). He was kind enough to send them to me quickly and well packed.
Time to seriously think about where to get the lead sheets for all my samples. Rick (sciencefare) advised this store http://www.imagesco.com/geiger/lead-sheet.html but the shipping charges is high for outside USA. Any suggestions?