Vintage Radio Service Manual - MECK model CR-500 10-tube Superheterodyne AM FM radio receiver. Manufactured by John Meck Industries, Inc., of Plymouth, IN. Dated 1948. 6 pages. Original old Sams Photofact manual includes schematic, layout, alignment instructions, dial cord drive, voltage & resistance test chart, repair parts list and description. This manual would make a sensational accompaniment to your retro audio equipment.