Vintage Radio Service Manual - FARNSWORTH model GK-100 GK-102 GK-103 & GK-104 10-tube Superheterdyne AM FM radio phono phonograph record player combination. ​Manufactured by ​Farnsworth Television and Radio Corp., of Fort Wayne, IN. Dated 1947. 10 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.