Vintage Radio Service Manual - KNIGHT model 5B-185 4-tube, Superheterdyne AM radio receiver with phonograph record player combination. Manufactured by Allied Radio Corp., of Chicago, 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 audio equipment.