Vintage Radio Service Manual - MOTOROLA model 107F31 & 107F31B (Chassis No. HS-87) Multi-Band 10-tube Superheterodyne AM FM SW radio receiver with combination phonograph record changer. Manufactured by Motorola, Inc., of Chicago, IL. Dated 1948. 10 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.