Hi and thanks to both Gary and Randall for the quick turnaround on the source firmware.
I have sucessfully burned a new 27c512 with version 8.2!
I had to dust off an old XT and find the manuals to the Unisite, but eventually I got it. Just tested the old PKC-3 and behold, it actually works!
I found a dozen at a local supplier so I now have about 11 27c512's left, onto which I will burn the Version 8.2
If others want them, I will be glad to send them on to new homes. All I will ask is for a SASE, of the bubble-wrap variety, and $5 each for my costs.
TNX de VA3AE