International projectionist (Jan 1963-June 1965)

Norelco, Ballantyne Sign Agreement For Distribution of FP-20 Projector A major theatre equipment sales agreement has been announced between North American Philips Company, Inc., New York City and Ballantyne Instruments & Electronics, Inc. of Omaha, Neb., electronics division of ABC Vending Corp. Ballantyne will become the major distributor for the Norelco Model FP20 35mm projector. The announcement was made by Niels Tuxen, general manager, Motion Picture Equipment Division of North American Philips and bv JRobert Hoff. executive vice president of Ballantyne. Projectors to Ballantyne The agreement calls for the purchase by Ballantyne of a large number of Norelco 35mm projectors. Norelco. in turn, will purchase from Ballantyne certain assemblies and sub-assemblies for its projector line which Ballantvne will manufacture to Norelco specifications. Ballantyne will use the FP-20 projectors for a lara;e number of indoor theatres already contracted for. In addition, the units will be adapted to accept high intensity lamps for use :i drive-in theatres. The Norelco units are considered to be among the most advanced on the market today and include the same engineering features as the Norelco 70/35mm model. Not only will the units conform to all American standards, but they will contain some unique features for positioning and focusing of all makes of arc lamps, it was stated. Curved film gate FP 20 features simple driving mechanisms with a minimum of transmission. It is said to be easy to thread with the smallest number of oarts included in the film path. It has a curved film gate and is suitable for all 35mm films. It has double soeed. single blade shutters and a high liffht efficiency, the announcement said. In addition, the above projector can be supplied with facilities for remote focusing and framing. As a complete unit, the FP-20 incorporates the optical sound head on the same base with the proiector mechanism. Provision is made for a magnetic reproducer which is supplied as an optional feature. A water-cooled film gate is said to eliminate the problem of film buckling. Mr Hoff said that the trade will be supplied under the existing teams applicable to the sale of this projector. He also said that within a few weeks Ballantyne would announce a "revolutionary new concept in the marketing of theatre equipment." iP PROJECTOR CARBONS Better Light! Lower Costs! RINGSDORFF CARBON CORP. East McKeespor.t, j'a. How electrical noise is produced . . . calculated . . . measured . . . controlled Here are the basic facts about electrical noise — how it originates in circuits . . . what terms describe it . . . how to measure it . . . how to design circuits to minimize its undesirable effects. The physical nature of the various sources of noise are clearly described, including such sources as thermal agitation or resistance noise . . . shot noise in vacuum tubes and semiconductor junctions . . . noise from spontaneous emission of electromagnetic radiation . . . and noise in gas discharges. This practical book also explains auxiliary mathematical techniques, and discusses the relation of signal and noise in various types of communication systems. For ease in use, the simple tuned circuit associated with a device for measuring average power is made the basic tool for analyzing noise. ELECTRICAL 270 pages, 6x9 105 illustrations $10.00 By WILLIAM R. BENNETT Data Communications Consultant, Bell Telephone Laboratories, Inc. Each chapter in this helpful book begins in a simple, practical manner and works toward more complicated examples. For example, properties of thermal noise and its relation to blackbody radiation are deduced from basic laws of thermodynamics and statistical mechanics. You also will find a clear treatment of elementary quantum mechanics in discussions of the maser and of noise in semiconductors. And, in describing noise properties of various devices, the book fills in your working background with basic facts on junction diodes — transistors — gas discharge tubes— klystrons— traveling wave amplifiers— and others. Both independent and dependent noise sources are analyzed. In addition to the standard theory of noise figure and its significance, a treatment is given of the more comprehensive Haus-Adler theory of noise measure. Throughout, the book stresses the universality of noise-like phenomena. Noise formulas for diodes and transistors; noise generation to meet specifications; design of amplifiers for minimum noise effects— these and many other topics "are covered. A comprehensive review of noise in the various methods of signal transmission such as amplitude modulation . . . frequency modulation . . . and the different kinds of pulse modulation is included. CONTENTS 1. General Properties of Noise 2. Thermal Noise 3. Distribution of Magnitudes in Noise Sources 4. Noise in Vacuum Tubes 5. Noise in Semiconductors 6. Noise in Electromagnetic Radiation 7. Noise-generating Equipment 8. Noise Measurements and Techniques 9. Design of Low-noise Equipment 10. Application of Fourier Analysis to Noise Problems 11. Noise in Communication Systems INTERNATIONAL PROJECTIONIST Post Office Box 6174 Minneapolis 24, Minnesota Please send me a copy of "Electrical Noise" by William R. Bennett. (I enclose $10.00.) Name Address City & State International Projectionist February, 1963 11