The talking machine world (Jan-June 1925)

May IS, 1925 THE TALKING MACHINE WORLD 91 The Truth About Portable Radio A Timely Message to the Radio Retail Trade For the past three years, The Operadio Corporation has centered all its efforts on the development and production of one style of set — the self-contained, or so-called portable type. Today this organization is by far the largest producer of six-tube portable radio receivers in the world. The remarkable growth in business which the company has enjoyed in this comparatively brief time is due entirely to the fundamental merits of the product and to the unceasing efforts of Operadio engineers to improve this unique set. During the course of this progress, other portable sets have, of course, appeared. Each Spring witnesses many such announcements. But no set of this type has ever challenged or even approached the popularity of the Operadio. This is because the public realizes that as specialists, Operadio engineers have had an advantage over manufacturers of big lines of sets, who naturally can devote but a portion of their time and attention to designing a really successful portable — wherein extreme compactness must be secured without sacrifice of efficiency. When "Light Weight" is Underweight The 1925 Operadio has won an enviable reputation in comparison even with large, costly stationary receivers for splendid performance. Its tone quality, razorsharp selectivity, volume, easy tuning and uncanny ability for long-distance reaches have attracted wide comment and enthusiastic praise. But right now when rumors are afloat of sets of extremely light weight and great power, it is significant to note that Operadio engineers are building a 1925 set which, though slightly smaller, weighs eighteen pounds more than their thirtythree pound model of a year ago. Ample Battery Supply and Good Loud Speaker The added weight of the 1925 Operadio is due to increased battery supply, which gives more economical operation, and adds to the serviceability of the set. The public has learned that to replace batteries every week or two, is far less desirable than to carry a few pounds more weight. Moreover, they have found that with small batteries, the set operates at maximum efficiency only a short time, as the voltage begins to diminish almost immediately. The Operadio has four of the largest "B" batteries built, providing more than 400 hours' service, and the "A" batteries deliver a minimum of 150 hours' service. This is unquestionably one of the biggest reasons why the set has given such universal satisfaction, and has proved so phenomenal a success. It has taken three years to learn how to put so big a battery supply into so small a space, and at the same time improve every other quality. And it is the firm conviction of the Operadio Corporation, based on three years' experience, that no portable receiver can be a complete and lasting success with a smaller battery supply. The marvelous clarity and fidelity of tone for which the Operadio is noted is the result of the most exhaustive research in loud-speaker development. Tests lasting over periods of months were made, and innumerable units were designed before one that was up to the high specifications of the engineers was accepted. What makes the 1925 Operadio such a remarkable achievement, however, is that while offering portability, it also provides every other advantage found in radio. It meets every requirement, whether at home, touring or on vacation. Now on the threshold of the biggest selling summer in radio history, investigate portable radio thoroughly. It will pay you to consider more than the weight of the set, the size of the case or the number of tubes. Look into experience; look to the proven results that such experience has produced. Then, we feel sure you will do as thousands are doing profitably — turn to the Operadio, the pioneer portable set of the radio industry. Write for further facts and details of the Operadio proposition to dealers. THE OPERADIO CORPORATION 8 SOUTH DEARBORN ST., CHICAGO, ILLINOIS Reg. U. S. Pat. Office $189 Complete ( Rockies)