Vintage Radio Service Manual - TRAV-LER model 5027 portable (battery-line operated) 4-tube Superheterodyne AM radio receiver. Manufactured by Trav-ler Radio & Television Corp., of Chicago, IL. 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.