Journal of the Society of Motion Picture and Television Engineers (1950-1954)

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of any standard receiver. The General Precision Laboratory staticon, built around the English staticon tube, is also competing in this field. Less sensitive than the image orthicon, the vidicon is not capable of the same resolution and picture quality, but on the other hand does not exhibit halo, streaking and other image-orthicon faults, and does not burn in a picture if left on a static scene. This has been particularly interesting to broadcasters since it means the camera can be left unattended. The vidicon tube has also been incorporated into a new and improved film-pickup camera now offered by RCA. It is expected to replace the iconoscope tube for film pickup and rival the flying-spot scanner. The German Television Society in Darmstadt has developed a very small light-weight image-orthicon tube. Television Equipment General Precision Laboratory developed a television camera pedestal with remote control of pan and tilt movement (Fig. 16). Rate and position control of both pan and tilt as well as six preset pan and tilt positions are provided. Pan through 280° and tilt through 63° are provided. With suitable remote focus and lens-change facilities on the camera, the choice of lens and focus can be preset. The pedestal can be remote-controlled. 35mm television background and filmchain projector Models PA-200 and PA-201 : Recent experience in television film systems indicates that quality improvement is obtained by operating vidicons and image orthicons with the longest available light pulse. The GPL 35mm film-chain projector has a 2:3 intermittent which is sufficiently fast € Fig. 16. The GPL Model PA-870 television camera pedestal showing remotecontrol components. to permit the use of a 40% open shutter. When equipped with an arc lamp, this machine is useful for television background projection and when equipped with smaller light sources, it is suitable for film-chain applications with any of the commonly used pickup tubes. Current experiments show the same highquality performance with film chains for NTSC color transmission. Television Broadcasting Stations Television broadcasting in the United States made tremendous strides in 1953. There were 250 additional television stations added before the end of 1953, some of these being equipped for operation in the 470 to 890-mc UHF region. Four of the new stations are educational outlets. Daily: Progress Committee Report 359