Vintage Radio Service Manual - TELE-TONE model 138 5-tube Superheterdyne AM SW radio receiver. Manufactured by Teletone Radio 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.