Vintage Radio Service Manual - CLEARSONIC model 5A66 5B66 5C66 & 5D66MPA. 5-tube Superheterodyne AM radio receiver.  With phonograph record player combination. Manufactured by U. S. Television Manufacturing Company, 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.