Geiger-Muller tubes: Comparison of SBM20, J305 and LND712

We understand very well the difficulties of choosing for radio amateurs who have to choose between different options, including tubes, when ordering a product. When we developed GGreg20 in 2020,…

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UV test of Geiger tubes J305

There are videos on the Internet showing that J305 tubes are very sensitive to UV rays. They literally go crazy under the influence of this type of radiation. We conducted…

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