Vintage Radio Service Manual - SPARTON model 6AM06 (Chassis No. 6-06) 6-tube Superheterodyne AM radio receiver. Manufactured by Sparks-Withington Company, of Jackson, MI. 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.