Vintage Radio Service Manual - HUDSON model DB47 (Factory Model 6MH089) 6-tube. Superheterodyne Car AM radio receiver.  Manufactured by Hudson Motor Car Company, of Detroit, MI. Dated 1947. 4 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 automobile audio equipment.