Vintage Radio Service Manual - MOTOROLA model 75F31 (Chassis No. HS-36) model 75F31A & 75F31B (Chassis No. HS-36A) model 76F31 (Chassis No. HS-90) 7-tube Superheterodyne AM FM SW radio receiver with phonograph record changer combination. Manufactured by Motorola, Inc., of Chicago, IL. Dated 1947. 8 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.