Finally, after many setbacks and delays, it's ready! This set was made with 11 different tapes, most NOS. The very well known Tascam 122 mkIII was used, and a quick online search can reveal a lot about the history of this deck. It was considered an industry standard in broadcasting and other fields.
Check out more info at the site. You can download the manual, a few demo programs, and listen to audio demos.
I thought those would be good to sample too. I might be mistaken, but the problem is that none of them have 3 heads. If you look in the forums (maybe even over at the old acustica site), it's been discussed that with tapes the only way to get a good sample is with a 3 head machine so you can monitor off of the tape while recording, which minimizes wow/flutter.
I've never tried recording, rewinding, playing/sampling, which you would have to do with the porta (again, unless i'm mistaken). You might get something workable, but then if your tone set (used in sampling) is ~20min long, your 'wet' tones might be off by a small fraction of a second after you record them back to digital.
Then again, with some thought/luck, you may be able to get something good out of it. On my page for this set, you can see that I mentioned how I had to use Adobe Audition to remove some wow/flutter even though this deck DID have 3-head monitor while record ability. The programs were unusable without that 'restoration' step. It's probably still worth trying just to see. good luck!