(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