Vintage Radio Service Manual - ARVIN model 140-P Portable AC-DC 5-tube AM radio receiver. Manufactured by Noblitt-Sparks Industries, of Columbus, IN. 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 audio equipment.