Vintage Radio Service Manual - RADIOLA model 75ZU  (Chassis No. RC-1063A) 5-tube Superheterodyne AM radio receiver combination phonograph record changer. Manufactured by Radio Corporation of America, of Camden, NJ. Dated 1948. 4 pages. Original old Sams Photofact manual includes schematic, layout, alignment instructions, dial cord drive, voltage & resistance test chart, repair parts list and description.  This manual would make a sensational accompaniment to your retro phono equipment.