a2aviator@gmail.com schrieb:
PNG may be lossless but it's not vector. It's still resolution specific. these are 72 DPI. Any increase in resolution results in jaggies by interpolation.
These files were created at 200dpi. Chosing a finer resolution would have resulted in bigger files with thinner lines. This worked fine with the HP Deskjet 500C, 890Cxi color and HP Laserjet IIIP b/w printers I had that time.
Nevertheless, the current Eagle 4.16 software prints into FreePdf XP fine vector graphics, so I will replace the files with better ones some time. The files were drawn with Eagle 2.16, a MS-DOS tool.
Nice to see that many people are still interested in the files. I traced the circuits because that time I had no chance to get hold of original diagrams or manuals. Today you can find the original literature from any manufacturer on the net. We should have had this knowledge available 25 years ago...
Patrick