Vintage Radio Service Manual - EMERSON model 537 (Chassis No.120043) 11-tube, Superheterdyne AM FM radio receiver phonograph phono record player combination. Manufactured by Emerson Radio and Phonograph Corp., of New York, NY. Dated 1947. 10 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.