[ARC5] R-23/ARC-5

[Michael Hanz]

Well, it is somewhat dated from a technology perspective (1953), and 
requires some batteries that are expensive and don't last long.  I power 
it with four small bench supplies on a 25 foot leash.
- Mike KC4TOS

On 3/1/2019 10:54 AM, Richard Knoppow wrote:
> Thanks, looks like a neat instrument.
>
> On 3/1/2019 4:10 AM, Michael Hanz wrote:
>> On 2/28/2019 11:00 PM, Richard Knoppow wrote:
>>> How are you measuring radiation, or lack of it?
>>
>> AN/PDR-27 GM Survey Meter:
>>
>> "The AN/PDR-27 is described by the Directory of Radiac Equipment 
>> (1961/62) as a “portable, watertight, battery-operated instrument 
>> that furnishes visual and audible indication, detection and 
>> computation of radioactivity data.”"
>>
>> "All the models employ two halogen quenched GM tubes: an end window 
>> GM, and a small side window GM.  The latter is only used when 
>> measurements are performed using the two higher scales (0-50 and 
>> 0-500 mR/hr). Some models (e.g., Model J) employ a two-compartment 
>> probe where both GM tubes are piggy-backed together.  Other models 
>> have the small higher range GM tube housed inside the case."
>>
>