(mostly for Mr. Shoppa, but others may have insight)
The old RCA tape I had mentioned is in fact larger that 1/2". It looks a
bit like 3/4". It is not video tape, as the reel says "RCA Electronic Data
Processing 501". A small paper label also has "BPROG", and a date from
1964.
God only knows what is on this tape, and if it could still be read!
William Donzelli
william(a)ans.net