Re: GM counter and Two-Way Radios

[a.zapantis@qut.edu.au (Alex Zapantis)]

>>We did the same thing using a Victoreen 450P (pressurized ionization 
>>chamber), whilst making measurements of radiation from a linear 
>>accelerator.  The meter actually registered way down (negative, with 
>>readings in milliR, as it is a LCD equipped meter). 

Is it possible that your ionisation chamber has become "wet" somehow? That
might explain negative readings. Victoreen makes an RF shielded ionisation
chamber detector. Is the 450P that one? I can't remember.




                        Alex Zapantis
                        Radiation Safety Officer                               
                        Queensland University of Technology          
                        Health & Safety Section                             
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                        Ph     : 61 7 864 3566
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                        email  : a.zapantis@qut.edu.au