Hi
Another test source i found that works is fertilizer. Ive got a bag of NPK powder mix and the K in it gives off about 80CPM's.
A pure bag of K before mixing will probably give off more.
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- Mon Mar 03, 2014 3:41 pm
- Forum: Geiger Counter
- Topic: FAQ: Test sources
- Replies: 8
- Views: 130476