[ARC5] AN/ARC-2 Nomenclature and Tags

[Michael Hanz]

On 5/7/2018 6:24 AM, David Stinson wrote:
> Please see the close-up photo of the ARC-2A.
> Anyone have an insight into the white tag?

I think it's a compilation of changes made to bring the set from ARC-2 
to ARC-2A condition.

> Second:  This rig has all the features of an
> ARC-2A, but it has a nomen tag that says
> "RT-91/ARC-2."  I thought the -2A was a completely
> new run, not a modification of the -2?  Any
> information (looking expectantly at Mike Hanz and
> Mike Morrow ;-)

The AN 16-30ARC2-12 mentions that the differences between the AN/ARC-2 
(http://aafradio.org/flightdeck/ARC-2.jpg ) and the AN/ARC-2A includes 
adding two fuse holders to the right side of the front panel, and 
deleting the meter switch in the center under the other two toggles.  
Looks like yours has been modified.  In a quick scan, the only other 
change I saw was the deletion of switch S-101 that was connected to the 
band switch in the ARC-2(non-A), and could be used for controlling an 
external switching mechanism, such as one which switched in an 
additional loading capacitor for end-loading an antenna on the lower 
frequencies.

The original contract numbers listed as AN/ARC-2(non-A) are NXsa-90807, 
NOa(s)-10216, NOa(s)-11025, NOas 51-245, NOas 51-271a, NOa(s) 51-688f, 
and NOas 52-918 through serial number 1199.

Sorry for the mid-boggling detail, but it is what it is...

73,
Mike  KC4TOS
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