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June 16, 1928 WINNETKA TALK 27 Equasonne Seen as Revolution in Radio Circuit Details of the revolutionary new Equasonne radio circuit, the first pub- lic announcement of which was made on June 9, were explained locally for the first time this week by Marcus W. Hinson of Radio Service Installa- tion, Wilmette, who attended the con- vention of radio men at Jackson, Mich., where the new circuit was presented. According to Mr. Hinson, the new Equasonne circuit is a radical ad- vance in radio science--as radical a change as that which marked the in- troduction of AC sets two years ago. The discoveries which made this cir- cuit possible represent a triumph for the research activities of the inde- pendent radio industry. It was de- veloped by The Sparks-Withington company, the largest independent radio manufacturers in the United States, in co-operation with Lester Jones, well- known radio expert of New York. The circuit promises a revolution in radio broadcast transmission for it makes the lower wave lengths of the broadcast band equally valuable with the higher channels--a fact that may induce the Federal Radio Commission to scatter the "cleared channels" over the entire dial instead of limiting them to the upper half and using the lower half as a "dumping ground." At pres- ent there are only 250 broadcasting stations between 550 and 1,000 kilo- cycles and there are 500 stations be- tween 1,010 and 1,500 kilocycles. In addition to the remarkable uniformity in its selectivity throughout the broad- casting wave band, there is a com- plete elimination in this set of all bal- ancing or neutralizing elements. The usual intermediate stage of audio amplification is also eliminated. A 25- watt power tube may be operated di- rect from the detector. This is pos- sible because a maximum undistorted amplification of 15,000 is obtained in the radio amplifier. All the selecting is done direct from the antenna. The impulsé passes through a single dial detector unit which allows a band of 10 kilocycles to pass. No tubes are employed in this new "band pass filter" selector. As radio listeners are aware, existing types of sets suffer much variation in selec- tivity tuning more broadly at short wave lengths than in the long wave lengths of the upper portion of the dial. As a result, in such sets, it be- comes almost impossible to receive distance stations below 250 meters without much interference and back- ground of noise. The new device selects so accurately that this noise and interference is eliminated as completely in the short wave lengths as in the long. It makes the set a pre-selective one for all the tuning is done before there is any amplification at all. No impulse from adjoining channels is admitted into the amplifier or detector units with the idea of filtering it out at a later stage of the process. The amplifier unit is as revolutionary in its operation as the selector units. With 6 tubes, one of them operating as a detector tube, it amplifies the impulse received 15,000 times--instead of the usual 5,000 times. Even the most sensitive of present-day sets rare- ly go above 8,000. This amplifier is unique in that it automatically tunes itself to the incoming frequency no matter what the wave length. The Equasonne circuit exhibits abso- lutely no tendency to oscillate. The necessity for balancing or neutraliz- ing condensors is therefore eliminated. Dr. M. H. Bickham Goes to Big "Y" Conference Student religious leaders from more than one hundred colleges and uni- versities in the Middle West are as- sembled for a nine-day conference at the Y. M. C. A. grounds, Lake Geneva, Wis,, which opened June 12. The con- ference includes such well-known speakers and workers among students as Dr. Charles W. Gilkey of Chicago, Dr. Sherwood Eddy of New York, Dr. Bruce Curry of Oberlin college, Dr. Jerome Davis of Yale university, and Dr. Martin H. Bickham of Wilmette. According to announcements the conference aims to give students who are working at various activities on the different campuses an opportunity to examine, evaluate and re-shape these activities from the point of view of what is most meaningful, creative and Christian. ; Dr. Bickham left Monday to head a section of the conference which deals directly with the search for better ways of meeting student life-situations. For the past year and a half Dr. Bick- ham has been studying student life in- timately. He is director of research of the Committee on Social Analysis of College Communities and author of "Student Service Projects." Mr. and Mrs. William Happ, 888 Elm street, announce the marriage of their daughter, Ruth E. Madson, to Harvey E. Young of Chicago. The marriage took place last Saturday evening at 8 o'clock at the study of the Rev. James A. Richards. Miss Eleanor King of Chicago was the only attendant of the bride and E. Fink of Wauconda was the best man. The young couple will live in Wilmette. Enjoy a Summer Vacation in the HIGHEST OF THE ROCKIES Boys -- Girls -- Ladies LEARN TO SWIM AND DIVE! New Trier High School Natatorium June 18 to August 10 Classes for beginners and for swimmers Special Instruction for those who need it For information call Mr. Jackson daytime--Winnetka 2400. Evenings University 6448 FERN LODGE & BEAR LAKE LODGE offer you, clean, rustic log cabins completely furnished with comfortable beds, an abun- dance of warm blankets, and fire wood for the cool mountain evenings. Horse back riding, trail trips, fishing, boating, cards, and dancing. FronT RANGE LODGES, Inc. -- -- ~~ Bear Lake mma -- Sp --. fn "------.. pp -- F-- | eR MO m------" Box B--Estes Park, Colo. | [ | | | i An Enjoyable Summer and one that can be long remembered because it brought not only a happy, healthful change from the usual year's work but it held the thrill of achievement. LHI This is the opportunity that is offered this summer by the EVANSTON ACADEMY OF FINE ARTS. One who has never tried to paint the beauty of a scene can- not appreciate the charm it holds. All of life may be- come richer through the experience of a short season spent in our summer classes. Imagine the charm of a beautiful garden, made yours because you have painted it and then to know that you have learned new things of quality and real worth! Summer School Begins July 9--Evening School 7:30-9:30 THE EVANSTON ACADEMY OF FINE ARTS CARL SCHEFFLER, Director Carlson Building Tower, Church and Orrington a SUNT Telephone Greenleaf 1674 LTT TT