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Russian glass Geiger tube type SI-10BG is sensitive to beta and Gamma rays. It was made for the Russian military for use in their DP-63A dosimeter. It operates on 375-400V, has a plateau length of 80V/0.25%V, a slope at 390±8V 1.25%V, length 75mm x 17mm diameter. Here in Arizona at our location, the background count is about 15 counts per minute. This tube works with our C8600ASB Geiger Counter Board and G24681 Holding Clips. New old stock (made during the 60's). Each is 100% tested and comes in original box with Russian spec sheet.
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