I now have a procedure for converting S&T issues in the DVD archive set into PDF files. Turns out I didn't need to burden my computer with a potentially buggy and/or malware-ridden conversion (f)utility from the Internet. The key is Microsoft Word, with which one can create a document and then save it to PDF format. I've tried this on the first two issues of "The Telescope." This should work for any of them, however, as they're all stored the same way prior to 2012, when S&T got wise and changed to PDFs.
1. Open a blank MS Word document.
2. On the menu ribbon, select Insert.
3. In Insert, select Pictures, then select This Device.
4. If you loaded your S&T magazine archives onto your hard drive, go to the folder in which you stored them. On my machine, it’s C:\Skyandtelescope. This should also work if you’re running from the original DVDs; just specify your DVD drive instead of your C: drive.
5. In the load pictures dialog box, navigate to the location where the images of the pages of the issue are stored. On my system, a sample path to an issue’s page images is:
C:\Skyandtelescope\1933-1941\The-telescope\issues\1933\1933-10\The_Telescope_SeptemberOctober_1933\[a bunch of random characters]
The pages are in the folder named [a bunch of random characters].
6. The “1933-1941” is the set name (in this case, for “The Telescope”). Ignore all folders with names like “images” or “covers.” Those are for the reading system provided by S&T. They aren’t needed for making a PDF.
7. Once you have found the page files, bulk-select them in the dialog box. Bulk-selection will preserve the order the pages are in; S&T named them in a logical order. Be sure not to select the Thumbnails at the end of the list, as you don’t want to load those into your document.
8. Under the “File” ribbon entry (at the far left), select “Save As.” Or, if you are like me, you have already made a “Save As” shortcut on the very top line of MS Word. In the “Save As” dialog box, select PDF in the Save as Type box. Name your file something useful, such as “Telescope 193310” for the Oct. 1933 issue of The Telescope.
9. You should now have a PDF of an issue. It will probably get stored in whatever folder you normally use as a default storage location.
It will be tedious, of course, to convert all the issues in the archive. If S&T had an all-PDF version of it available for sale, I'd buy it and not try this method, but they don't seem to have one. Phooey.
The key to this solution is MS Word. I am only familiar with Windows; my system runs on Windows 10. I have absolutely no knowledge of how to do this on a Macintosh or Linux computer.
I hope this will work for others. I am still miffed at S&T for not PDF-ing their archive in the first place.