Vintage STROMBERG-CARLSON model BP-1 4 tube Superheterodyne AM radio receiver. Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart, repair parts list and description. 4 pages. Dated 1954. This manual would make a sensational accompaniment to your classic radio equipment. Stromberg Carlson Company. of Rochester, NY. This manual would make a sensational accompaniment to your classic radio equipment.