Vintage Radio Service Manual - SENTINEL model 293-CT & IU-293-CT 6-tube Superheterodyne AM radio receiver with phonograph record changer combination. Manufactured by Sentinel Radio Corp., of Evanston, IL. Dated 1947. 4 pages.  Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. This manual would make a sensational accompaniment to your retro phono equipment.