LND712 vs the SBM-20

  BroHogan
76   22.5K  

Using the Geiger Kit with two tubes installed - the SBM-20 & LND712. Comparing two sources (mantles & smoke detector pellet) between the two. Comparing differance between side of LND712 and it's alpha window. More info at:  ... 


LND712 vs the SBM-20
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