Geiger–Müller counter with three STS-5 lamps

Bob @ robertgawron.blogspot.com The Geiger–Müller counter is a relatively simple tool to measure ionizing radiation. This construction of the Geiger–Müller consist of three (instead of one as usually) soviet STS-5 lamp to increase sensitivity. It’s important for measurements of natural sources of (low) radiation like soil, rocks (an article about my...