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yobbo II
National Hazard
Posts: 762
Registered: 28-3-2016
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Geo Electronics on ebay has lots of interesting stuff.
I purchased a Ledlum from him years ago with alpha heads.
https://www.ebay.com/sch/i.html?_dkr=1&iconV2Request=tru...
Yob
[Edited on 15-3-2023 by yobbo II]
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Herr Haber
International Hazard
Posts: 1236
Registered: 29-1-2016
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Late January I got an SBT10A based counter from Lithuania (eBay) unfortunately it ceased functioning after a couple of days...
I first thought it was the battery since I had been playing forensics in my appartment for most of the weekend. I'll have to contact the seller and
see if he cares that his unit broke down merely after days of usage.
But boy... that was scary and enlightening !
Three tritium vials put together: 92cpm 0.07µSv/h
The bottom of my bathtub: 294cpm 0.24µsV/h
"Cool" Uranium glass: 204cpm 0.16µSv/h
"Hot" Uranium glass: 6933 cpm 5.55µSv/h
The SBT10A tube is apparently very sensitive. I cant really explain the readings in my bathtub. I ended up in my bathroom looking for a place with the
least background radiation. Imagine my surprise (and disbelief!) when I realized my bathtub is more radioactive than tritium vials !
I hope I can get this Geiger counter fixed easily, next place I'm taking it is 20 meters below Pierre and Marie Curie's old lab. I know they had a
well where they would dump pechblende waste. I has been depoluted since but I'm curious how well the job was done 
The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
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