[Milsurplus] Navigation System

[scottjohnson1 at cox.net]

It's not odd when you consider the number of the receiver, versus the number of the complete set. that is what indicates the chronology of registry in the JAN system.

Scott
> 
> From: Mike Hanz <AAF-Radio-1 at cox.net>
> Date: 2006/03/20 Mon PM 12:15:46 PST
> To: milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] Navigation System
> 
> >
> >
> >For WWII-era, you'd have to omit the AN/ARN-6, which is definitely a post-WWII set.  Oddly enough, the improved SCR-269 (BC-433) ADF, the AN/ARN-7, well predates the AN/ARN-6.  
> >
> 
> Well, I was somewhat less certain about that when I read the 
> observation.  In the process of moving, I unearthed CO-NAVAER 08-5Q-227 
> (Nomenclature List for Bureau of Aeronautics Aircraft Electronic 
> Equipment - Confidential) dated 1 April 1945, and the ARN-6 is listed 
> there plane (heh) as day.  Equipment that hasn't been released for 
> deployment yet has "In development" next to the entry, but no such 
> remark accompanies this entry, which simply sez, "AN/ARN-6( ).   
> Airborne MF Automatic Radio Compass.  Lighter in weight than SCR-269."  
> I'll agree it was probably not widely deployed by then, but 
> /technically/ it seems to qualify as a WWII set - depending on one's 
> definition of 'wartime', I suppose.  Of the ARN-7, the entry says, 
> "Airborne MF Automatic Radio Compass.  Similar to SCR-269( ) except 
> added frequency range."  It also lists ARN-8 and ARN-12 marker beacon 
> receivers.  No indication of ARN-9 to 11, but that's typical for the 
> Navy pubs...if it's a Signal Corps-instigated acquisition, they ain't 
> interested in them.  :-)
> 
> 73,
> Mike
> 
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