[Milsurplus] [armyradios] Radio set values

[Clare Owens]

It's hard to convert CPM to mR/hr with a counter like mine.  It is a mica
window unit and uncompensated.  If I had some 2mm tin sheet I could get a
fairly accurate dose rate estimate but I have never found any real tin
except in bars.  In any case the radiation would be the least of your
worries if you were in a life boat or raft in the middle of a war zone :-)

The early TBX models also have radium paint right on the front panel,
unprotected.  I had one for a couple of years and finally sold it.  It gave
about the same readings as the Gibson Girl.  I figured one of those sources
in my radio room was enough.

Clare




On Mon, Apr 29, 2013 at 11:45 PM, <WA5CAB at cs.com> wrote:

> That's moderately hot.  Double 21,000C/M @ 6" would be 17.5 mR/Hr at the
> standard distance of 1 ft.  I haven't kept up with standards since I got
> out
> of the business but the unmonitored boundary around operations used to be
> 2mR/Hr.  Which would be at a distance of just under 3 ft. from the Gibson
> Girl.
>
> In a message dated 04/29/2013 18:25:53 PM Central Daylight Time,
> clare.owens at gmail.com writes:
> > I can't help with the values but I can say that he should not attempt to
> > clean or otherwise disturb the Gibson Girl's front panel black area,
> where
> > the light colored panel legends are radioactive radium paint, completely
> > unprotected.  The markings normally do not glow in the dark any more
> > because the phosphor materials have deteriorated in the past 60 years.
> >
> > My Gibson Girl is the most radioactive thing I own by a fair margin.  At
> a
> > distance of 6 inches it reads about twice as many counts per minute as I
> > get at 6 inches from my 5 microcurie Cs137 test disk.  The Cs-137 at 6
> > inches averages around 21,000 CPM on my Mazur PRM-9000.
> >
> > Left alone the paint really isn't a problem but ingested or breathed in
> it
> > could be quite nasty.
> >
> > Clare
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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