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JANUARY, 1932
Page 29
The key to better sound projection
— for operators on all types of equipment.
This new book makes easy the successful operation and repair of all makes of sound projection apparatus, by explaining simply and clearly the fundamentals of sound reproduction and projection upon which all types of equipment are based.
— Just published —
PROJECTING SOUND PICTURES
By AARON NADELL
Publix Theatre Corporation; Formerly of Electrical R^seTch Products, Inc.
265 pages, 6x9, 100 illustrations, $2.50
Whether you are a sound projectionist by profession or only occasionally work on sound equipment, you will find this an invaluable handbook, presenting the fundamentals that will enable you to understand the problems arising in the operation and repair of all makes of sound equipment.
Beside explaining the theory of sound reproduction on disc and film, the book takes up each unit of the sound equipment, explaining the underlying theory and principles, showing by description and illustration how these are applied in various types of apparatus. At the same time the author points out the common troubles associated with each unit and the remedies for them. In addition a chapter is devoted to precautions to take to prevent trouble and another on tracing trouble and correcting it. Because of its value in forming a clear understanding of the operation of tubes and photo-electric cells, the electron theory of the nature of currents is explained, in a surprisingly simple way. The book is thorough, authoritative, practical. It minimizes constructional details of various makes of equipment in favor of the basic facts that will enable you to understand all makes.
See it 10 days free — Send this coupon
Mc Graw-mill
FREE EXAMINATION COUPON
i
| McGraw-Hill Book Co., Inc., 330 W. 42nd St.. New York. N. Y.
Send me Nadell— PROJECTING SOUND PICTURES, $2.50 for
10 days' free examination. I will return the book in 10 days or remit for it then.
NOTE: Questions, with answers, at the end of each chapter, a Precaution Index, and a Trouble Index, form the equal of an invaluable "troubleshooting" chart; a quick means of looking up the cause and cure of every projection trouble.
Name
Address
City and State.
Position
Company
Here's "PROF
for You .
T
fees'
The New Webster-Chicago
Midget Portable
Public Address System
Think of it — a complete powerful voice or music system that you can carry in one hand! And priced so low that it will pay for itself in a few evenings' rentals.
It is well built, practical, dependable. One carrying case includes the complete outfit consisting of:
(1) Powerful push-pull amplifier employing screen grid and pentode tubes.
(2) Phonograph turntable, driven by synchronous motor — plays either 33 1/3 or 78 R.P.M. records.
(3) One microphone. Control provides for mixing of phonograph and microphone, allowing musical background for vocal announcements.
(4) One high-grade dynamic speaker. Provision is made for plugging in one additional speaker.
(5) 15 ft. of microphone cable. Polarized plugs prevent possibility of wrong connections.
(6) 30 ft. of speaker cord.
(7) Complete power supply for I 10 or 220 volts, 50-60 cycle alternating current.
Write for descriptive bulletin So. 115.
WEBSTER M CHICAGO
The WEBSTER Company
Sound Amplifiers for Every Purpose
854 Blackhawk St. Chicago, III.