Simple Geiger Counter

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AFW
Posts: 157
Joined: Sun Dec 10, 2006 5:51 pm
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Simple Geiger Counter

Post by AFW »

At a recent Ham Radio rally, I came across a couple of working Geiger counters, for less than the price of one of my G-M tubes, but it was still quite fun and instructive to make

The apparent ineffectiveness of C5a was due to a bad switch. with this fixed, the value shown gives an equilibration time of ~2 min., useful for low count rates, e.g. background. - AFW
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