Does such a thing exist? The peripherals handbook I got with my 11/03
doesn't list such a thing, but I can imagine that there are Q-bus tape
drive controllers that talk to a pertec interface that would work.
DEC probably didn't make one at that time. although IIRC the TSV05 was a
Pertec controller that went with the TS05 magtape (a rebadged Cipher 880)
I am sure there were also third party cards from the likes of Emulex and
Dilog. I can't see why any of them would have problems in an 11/03
machine (modulo the normal problems with odd signals on the top 4 address
lines in some early backplanes).
-tony