Many months ago, I saw an article in Nuts & Volts (I rnthink) about building a Geiger counter. I've rnsearched the past several years' worth of issues but haven't found it. Either I haven't found the right issue or it was someplace else. Any ideas about the issue or how to build one?rnI have an old "tube type" unit that doesn't work - even after I replaced the 67 1/2 volt batteries with a bench supply. I've got a nice metal box, display meter, switches, etc., and a GM tube in a housing. I'd like to make something of this thing.
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