Vintage Radio Service Manual - GENERAL TELEVISION model 25B5 5-tube (battery operated) Superheterodyne AM radio receiver. Manufactured by General Television & Radio Corp., of Chicago, IL. 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.