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 2.GQ Geiger Muller Counter
 High GMC 300E readings = failure mode?

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T O P I C    R E V I E W
GoldOriented Posted - 12/03/2013 : 04:28:47
Since 22 Nov 2013 have been seeing a few fairly large spike clusters (4000CPM+) each day here in San Diego. The rate/number of spikes has been steadily increasing as well as the duration and magnitude until this morning (since 3am Monday 3 Dec 2013)I am seeing a cluster of spikes of 4000CPM++ lasting for over two hours.

Is there any known GMC 300E failure mechanism that would allow entirely normal readings most of the time with these spike clusters each typically lasting only 2 -5 minutes or so. They gradually subside quickly to normal readings but begin rather abruptly.

So far this is a very small rad dose if it is real. Have at least 200 hour so before any concern for health at all.

Could you email (or also email) any answer/help? frankvaught@sbcglobal.net Thanks.

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ZLM Posted - 12/03/2013 : 22:40:36
If your background reading is higher than normal with no reason( >100), then the tube may have some problem. It need to replace the tube.

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