On Fri, 26 Mar 2021, Paul Koning wrote: > Some machines used 7-track paper tape that is narrower than 8 track > tape. I thought Whirlwind was one of those. Yes, the LGP-30 uses 7-tack paper tape as well. Normal 8 track paper tape is 25.4mm, 7 track tape 22.2mm. The latter is absolutely unobtanium... (I think we have one or two spools). Christian