Vintage Radio Service Manual - GENERAL ELECTRIC model YRB-60-1 YRB-60-2 & YRB-60-12 5-tube Superheterodyne AM radio receiver.  Manufactured by General Electric Company, of Bridgeport, CT. 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.