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 2.GQ Geiger Muller Counter
 High CPM with SBT-11A

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T O P I C    R E V I E W
U-238 Posted - 01/11/2017 : 20:20:54
Hi, I got my sbt-11a a couple weeks ago, finished installation and it worked fine. I go to test it today and it reads 3k cpm with no radioactive sources nearby. I had is sitting in my garage for a while. Is it possible the freezing temperatures break it? When I shake the tube it sounds like there is something broken inwside it. But I heard this when I first got it.
3   L A T E S T    R E P L I E S    (Newest First)
Distelzombie Posted - 01/13/2017 : 08:12:20
My sbt11a does not make any rattling sounds when shaken. You should probably return it.
U-238 Posted - 01/12/2017 : 07:15:27
okay thank you
ZLM Posted - 01/11/2017 : 20:56:40
It could be the tube problem. You need to make sure the tube voltage is correct. If the voltage exceeded the upper limit of the tube. It may damage the tube.

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