I may be able to help you out, depending upon how many
you need. I've been trying to collect TK50 tapes, since
I use them on my PDP11s, but I may have a bit of a
surplus.
I should have 18 new ones arriving sometime this week.
I need some of them, but I could let 5 or 6 go. I'm
not sure what shape they are in. Somebody contacted
me by email saying they found a bunch of them cleaning
out an old computer room.
They appear occassionally on eBay. You can also try
old DEC shops. Dec distributed a lot of their system
software on TK50s. These tapes were written once, and
read a few times, so they are usually in pretty good
shape.
--
Dr. Mark Green mark(a)cs.ualberta.ca
Professor (780) 492-4584
Director, Research Institute for Multimedia Systems (RIMS)
Department of Computing Science (780) 492-1071 (FAX)
University of Alberta, Edmonton, Alberta, T6G 2H1, Canada