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Registered Member #1601
Joined: Tue Jul 22 2008, 02:31PM
Location: Alverca, Portugal
Posts: 5
thank you, but that link I already have, I'm searching for something with more info, charts like voltage/CPM , etc. Does any one know the conversion of CPM to other radiation units for this tube ?
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
I looked for more info on that same tube too when I made my counter and didn't find anything else. Your best bet would be to calibrate the tube against a known source of radiation.
Registered Member #1630
Joined: Sat Aug 09 2008, 11:36AM
Location: Seoul Korea
Posts: 115
On yahoo groups there is an EXCELLENT source of info about Geiger counters especially (these russian units) on Geiger counter enthusiasts, and CDV700 group. GEOS (members name) is a professional at building geiger counters and know more about calibration of these. He sells Cs137 check sources and it is pretty reasonable.
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SBM 21 geiger tube datasheet
