[Milsurplus] So what is a : CU-32 for an ART-13A

[WA5CAB at cs.com]

Mike and Mike,

The schematics and wiring diagram you are discussing all date from the new 
manual done 08 March 1949.  It almost looks like the master was broken and 
put back together slightly skewed.  So that the horizontal lines to the left 
and right of the break don't quite touch and don't quite line up vertically. 
 I have an original of the 1949 AN 08-30ART13-4, and it has the problem.  
But I can't prove it was printed in 1949.  I can't find any print history 
except on the revised title page.  So my copy could be a reprint or it could be 
an original original brought up to date with all of the Change packets.  
But whenever it happened, when they revised and reissued the manual with a new 
basic date of 30 March 1956, they didn't fix the C-drawings.

I also fixed the schematics and wiring diagrams in the two manuals.  Which 
did take a lot of work.  First cutting the portion to the right of the 
disjoint and rotating it slightly.  Then pasting it up and to the left slightly.  
As my TIF editor lacks any form of snap to point or snap to line, I had to 
eyeball it and it probably took 6 or 8 tries before I finally decided I 
couldn't tell that it had been done.  Fortunately, the only differences between 
the 1949 basic and the 1956 basic are Publication Numbers and page numbers.  
So I didn't have to do everything twice.

In a message dated 11/28/2009 11:57:54 AM Central Standard Time, 
kk5f at earthlink.net writes: 
> I wrote:
> 
> >>BTW, Mike's AN/ART-13A schematic referenced above is an outstanding copy
> >>that is much better than the same circuit found in most original 
> AN/ART-13A
> >>manuals...Mike's copy must have come from an early original manual that 
> had
> >>not been corrupted.
> 
> Mike Hanz replied:   
> 
> >Appreciate the kind words, Mike.  Actually, I spent hours combining 
> >several scans into one schematic and cleaning that schematic up to be 
> >halfway readable, so perhaps the problems were there from the early 
> >manual as well.
> 
> Mike, I apologize for assuming you had duplicated a decent original.  I 
> can
> appreciate the amount of work it took to correct.  I did the same using a
> sheet scanner, paper cutter, drafting instruments, and tape some years 
> ago.
> It took hours to eventually scan and print out a halfway decent correct 
> copy,
> but one can tell its had such surgery, plus I couldn't make an electronic 
> version.
> Yours looks like it should have originally.  I even printed out a 
> poster-sized
> version and put it on my office wall, though no one else who sees it has 
> any
> idea what it is! 
> 
> It doesn't say much for USAF attention to technical detail that such a 
> poor
> schematic was tolerated for many years on the most important single page 
> in
> the entire maintenance manual!  I have examined several revisions of the
> these AN/ART-13A manuals and never found an uncorrupted main schematic.
> 
> Mike / KK5F
> 

Robert & Susan Downs - Houston
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MVPA 9480