Re: Information on Radiac Calibrator Set

[Gerald Feldman <gfeldman@uci.edu>]

At 03:15 PM 10/22/96 -0500, you wrote:
>     ...     
>     I am looking for information on a Radiac Calibrator Set (Free Air 
>     Collimated Calibrator) Model AN/UDM-1A.  I would like to converse with 
>     someone who is currently using this device. ...

>     Thanks
>     
>     
>     Jerry Barber
>     BARBERJ@M4LP.COM
>
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Pardon my ignorance, but what is a "Free Air Collimated Calibrator"?  Free
air calibrators are, by definition, not collimated.  Add a collimator, and
it isn't "free air" any more.  At least that's what I thought I read in NCRP
#112.   (And just when I thought we were running out of new oxymorons...).

Gerald Feldman
gfeldman@uci.edu