The EG&G Film Magazine Type XPH-47 was designed to meet specific NC-135 program requirements for a reliable, simple and economical unit which would adapt the LC-4 camera for moving film oscilloscopic photography at film speeds suitable for the separation of oscilloscope sweep traces. Essentially, the XPH-47 is a standard Beattie-Coleman Type 32800 magazine, redesigned for incorporation of features which would fulfill these requirements. One such feature - replacement of the original motor with a new motor having a control circuit - provides constant speed operation and consequently, reliability not achieved by other film magazines. The XPH-47 is a self-contained unit consisting of both supply and takeup spools and a film transport mechanism. It is normally loaded in subdued light with 100 feet of 35-mm film and then placed on the camera. The magazine is removed from the camera, and the film is unloaded in a darkroom or in subdued light. The XPH-47 can be wired for use directly on the LC-4 camera to allow magazine operation with the shutter open. If desired, with additional minor wiring changes in the LC-4 camera, film motion signals can be routed through the camera to an external control panel. The leads to the two …