Just took a whack at it myself. It went better than my "08340-90021 Vol 4 Process Attempt" I think.
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Peter and Dave, both of your processed files appear good to me. That final schematic (page 26 11707A0026.tif) is a rough one no matter what. Pages 14-17 are a bit tricky and the final two pages are a bit of a nightmare. The question is are were going for "archival" or "readable". My processed output is certainly not archival, but mostly readable. I would be in favor of having a heavily processed (yet readable) version that can easily be downloaded and printed, and then save/upload the raw ingested tiff's (losslessly compressed, lzw) as the "archival" masters. For a working readable copy, certain things are more important (like the parts lists and component values) whereas the the final two pages (Sales & Service Offices) are pretty useless for us, but still certainly important from an archival perspective.
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Regarding dpi, I have found 300dpi sufficient for many things. Of course 600dpi where possible would always be preferred for true archiving. A good example of schematics that need a high dpi (600+) scan would be the 4194A schematics. Those freebie 4194A pdf's floating around are unreadable!
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-Michael
