[ARC5] 12 V SCR-274N

[WA5CAB at cs.com]

There is also an R-3/ARR-2X which is the same as R-4/ARR-2 except 14 volt.  
And a single receiver rack was built for it.  The dynamotor used on the R-3 and 
the R-148 is DY-1/ARR-2X.  I've had a couple of the dynamotors through here.  


As far as the navigation sets are concerned, the earliest MN-26 manual I have 
is dated 1941.  And it covers the A, C, M and Y.  So it seems reasonable to 
assume that the MN-26A is even earlier.  Plus the MN-26 was also used in 
civilian aircraft, which was a different market and would have tended to have more 
older aircraft still in service during the War years.  I would assume that the 
AN/APN-1X was built to install in older 14 volt aircraft that didn't 
originally have any radio altimeter at all.

In a message dated 9/8/2007 4:13:35 AM Central Daylight Time, 
dennis.monticelli at gmail.com writes: 
> I have an R-148/ARC-5X this is essentially an R-23A with 14V filament
> wiring and a 14V dyno.
> 
> Dennis AE6C
> 
> On 9/7/07, J Forster <jfor at quik.com> wrote:
> >Not to mention things like the MN-26 and APN-1.
> >-John

Robert Downs - Houston
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