Vintage Radio Service Manual - WILMAK Model W-446 DENchum 4 tube, AM Superheterdyne radio receiver. Manufactured by Wilmak Corp., of Benton Harbor, MI. Original old Sams Photofact manual, schematic, layout, voltage/resistance charts, alignment info and repair parts list. Dated 1947. 4 pages. This manual would make a sensational accompaniment to your vintage audio equipment.