Vintage Radio Service Manual - ZENITH model 5G038 (Chassis No. 6C50) 6-tube (battery-line operated) Superheterodyne AM SW radio receiver. Manufactured by Zenith Radio Corp., of Chicago, IL. Dated 1948. 6 pages. Original old Sams Photofact manual, schematic, layout, voltage/resistance charts, alignment info and repair parts list. This manual would make a sensational accompaniment to your retro audio equipment.