C Chris Hogg Contact options for registered users Vote on answer posted 8 years ago Wed, Mar 16, 2016 8:21 AM Show Quoted Text And a simple circuit here formatting link Reply toChris Hogg Notify me about replies to my post Reply
D dennis Contact options for registered users Vote on answer posted 8 years ago Wed, Mar 16, 2016 8:27 PM Show Quoted Text Why not build a scintillation counter? They detect more than GM tubes. Reply todennis Notify me about replies to my post Reply