Vintage Radio Service Manual - HUDSON model DB48 (Factory No. 6MH889) 6-tube automotive car Superheterodyne AM radio receiver. Manufactured by Hudson Motor Car Company, of Detroit, MI. 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 audio equipment.