[Chas]

This is a page extraction of Riders PDF, original scanner unknown. If this is good enough, fine. If not I have the original Riders page and can scan at 1200 dpi which would yield a 15mb file, or scan to such a file size limited to my email client.

I do agree, there are a lot of fine lines that are pointers but also mixed with wiring in the diagrammatic representations.

I may have a 1941 Philco yearbook, but cannot put my hands on it. If I do it may be printed at a higher resolution than the Riders original print, dunno. If it is that would be the most resolve of any publication.

Advise to Phorum I will be notified of your response.

PDFsam_vol_12.pdf Size: 62.91 KB  Downloads: 94

If I scan I will input as a color file and then alter contrast/brightness to enhance "missing" line yet, try to maintain resolution in the text. Followed by conversion to B & W (two bit) file for best compression by the PDF creator (Gimp)...

Try importing the file provided into a photo processor and determine if can be enhanced. It appears to be RGB

GL

Chas