Vintage SONORA model RKRU-215 (Chassis RKRU) combination Superheterodyne 6 tube AM radio receiver with phonograph record player. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test charts, repair parts list and description. Dated 1946. 4 pages. Sonora Radio & Television Corp of Chicago, IL. This manual would make a sensational accompaniment to your classic retro radio / phono equipment.