of which I don't know. It is a 40 pin to 50 pin ribbon cable with a black box connecting them that is labeled TANDY. I know of nothing the Tandy made that used a 50 pin connector other than a hard disk.
On Wed, 12 Apr 2017, Parent Allison via cctalk wrote:
Maybe... The only device I know of like that was trs80 to a printer (Centronics or compatible ).
Radio Shack used 34 pin for "Centronics" compatible printer cables. (#26-1401 was a cable with 34 pin card edge to 36 pin Blue Ribbon)
