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1947-48 Theatre Catalog, 6th Edition, Page 486 (470)

1947-48 Theatre Catalog, 6th Edition
1947-48 Theatre Catalog
1947-48 Theatre Catalog, 6th Edition, Page 486
Page 486

1947-48 Theatre Catalog, 6th Edition, Page 486

point. He has available the special films and test equipment needed for noise and flutter tests. He has the equipment and know-how for properly phasing and poling the stage loudspeakers so that their outputs blend smoothly into each other.

The servicer has a special Triatic signal tracer, This unique instrument, acclaimed by service experts as one of the most valuable developments in the test equipment field since the beginning of sound pictures, enables him to test the systems performance at virtually any point. With it he can quickly locate the source of sound trouble, hum, and so forth. He can test for changes in capacity and variations in voltage. The results are reflected by a miniature television mirror screen. Moreover, he can perform these operations while the system is in regular operation. By coupling the Triaticts built-in high gain amplifier direct to the photo-tube in one soundhead, he can proceed to test and

align its optical system by running a frequency film while the other projector is going ahead with the regular performance. .

Still another instrument, the VoltOhmyst, provides accurate metering of voltages and circuit resistances.

Besides these special test aids, the servicer is equipped with special tools. And in addition, he carries with him a portable emergency amplifier equipped with cables and adapters for connecting it in lieu of the regular theatre system. A variable frequency compensator adjusts the frequency response characteristics to match that of the system it replaces. With this amplifier handling the show, the servicer can proceed with the repair of the regular system. It has proved particularly valuable in restoring fire-damaged installations to service.

Of course, the mere possession or availability of such equipment is in its self no guarantee that the results will

THE TRIATIC SIGNAL TRACER enables the servicer to test the sound system's performance at virtually any point. With it he can quickly locate the source of sound trouble, burn, and the like. He can test

for changes in capacity and variation in voltage.

The results are reflected by a miniature television

screen. The tests with the signal tracer can be performed while the sound system is in operation.

measure up to the cost. The man must know how to use it. And, in addition, he must know how to correlate the various data and interpret them.

Each theatre servicer is carefully selected for his technical ability, experience and general knowledge of theatre sound and projection equipment. He is given specialized instruction on the installation, adjustment, operation, and servicing of all makes and all types of sound equipmentecompetitive, as well as his own companyls. To keep him informed, his home office constantly feeds him information in the form of installation and operating instructions, equipment modification data, and service procedures.

When a difficult problem requires special handling, the servicer gets assistance from his theatre field supervisor.

.Whenever he wishes, the district service

manager may also request assistance from the technical section of the home office, He can go even farther and request an investigation by the electronic acoustical engineering department of his company. The latter, in turn, can bring into the picture the unparalleled facilities of the companyls technical and research laboratories.

The edectiveness of the theatre serviceris work is expanded by a replacement parts plan, a feature which is finding favor with both the exhibitor and the projectionist. This is the plan under which for a nominal fixed sum each week or each month, the company furnishes all replacement parts and tubes required by reason of normal wear and tear. The exhibitor likes this plan because he can accurately budget his maintenance costs; the projectionist favors the plan because he knows that his equipment is going to be maintained in first-class condition. The servicer prefers this plan because under it he is free to order any part or tube which he thinks should be replaced without bothering with approving signatures.

The projectionist also can help expand the usefulness which he and his theatre derive from the service plan. He can spot parts which may require replacement. These he can point out to the servicer during routine inspections. He can also describe to him any peculiarities he has noticed in the operation of the equipment since the last inspection. He can also help by maintaining a stock of replacement parts in an orderly condition with everything plainly labeled.

To help the projectionist keep abreast of technical developments, the RCA Service Company can furnish him with helpful information through the medium of such books as the ttPhotophone Handbook for Projectionists" (of which 30,000 copies have been distributed all over the world) and the uTheatre Television Handbook for Projectionists." Close contact is, of course, maintained with the Academy of Motion Picture Arts and Sciences and the Society of Motion Picture Engineers.

It is possible to operate a theatre without the regular benefits of a good sound service organization. But such an organization is almost indispensable to exhibitors who are striving to make the most out of their investments. This group, numbering 21 good many thousands, knows that a good trouble-preventive service plan is definitely not a luxury.

1947-48 Theatre Catalog, 6th Edition, Page 486