Vintage Radio Service Manual - EMERSON model 536A 551A & 553A portable 6-tube Superheterodyne AM radio receiver.  Manufactured by Emerson Radio and Phonograph Corp., of New York, NY. 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.