Vintage Radio Service Manual - ARVIN model 152T 5-tube Superheterodyne AM radio receiver. Manufactured by Noblitt-Sparks Industries, Inc. of Columbus, IN. Dated 1948. 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.