Vintage HOFFMAN model A-300 (Chassis 100) Superheterodyne 6 tube AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test charts, repair parts list and description. Dated 1946. 4 pages. Hoffman Radio Corp., of Los Angeles, CA.  This manual would make a sensational accompaniment to your classic retro radio equipment.