The US government issue CDV-700 geiger counter came with a hard-wired pickle probe that had a 900v beta/gamma halogen quenched thin-wall metal tube. There were a limited number of 900v tubes issued by FEMA that had 1/10 the sensitivity of the originals to increase the range of the CDV. The more sens...By: DavidN71
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from Instructables: exploring - technology - robots http://ift.tt/1DedaM6
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