Vintage Radio Service Manual - PHILCO model 48-141 & 48-145 4-tube, (battery operated), Superheterodyne AM radio receiver. Manufactured by Philco Corp., of Philadelphia PA. 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.