Radio age (Jan 1927-Jan 1928)

RADIO AGE for September, 1927 43 The NEW. "ENSCO' 3-Ft. Cone /jV Wall Type Loud / \ Speaker $10.00 Complete "ENSCO" Kit With Hardwood Wall Frame $11.00 Kit contains "ENSCO" Direct-drive unit, designed and patented by Clyde J. Fitch; Beautifully decorated Alhambra FON-O-TEX Cone Material; Metal Apexes; Extension Pin and 12 page illustrated Book of Instructions for easy assembly of any of six sizes of Cone or Roll shape Wall, Pedestal or Console speaker. Ton can build it in less than an hour. Static materially reduced — winter results all summer. The "World's Finest Loud Speaker" Now within the means of every one. At your dealer's or direct from any of the offices listed below. Send check, money order or C. O. D. Shipping charges paid. Absolute (money-back) guarantee. ENGINEERS' SERVICE COMPANY 25 Church Street, New York 73 Cornhill, Boston 28 E. Jackson Blvd., Chicago 331 Bay Street, Toronto, Ontario Member KMA POLK'S REFERENCE BOOK FOR DIRECT MAIL ADVERTISERS Shows how to increase your business by the use of Direct Mail Advertising, 60 pages full of vital business facts and figures. Who, where and how many prospects you have. Over 8,000 lines of business covered. Write for your FBEE copy. R.L.POLK& CO., Detroit, Mich. 599 POLK DIRECTORY BUILDING Branches in principal cities of U. S. advanced student of radio who was working on super hets. Radio Age takes this opportunity gladly to say for the thousands of radio fans who knew and loved him that he has left a record of service that will stand as an enduring monument to remind us of a man who was big enough to give the best he had to his fellows with little thought to immediate rewards. Frank D. Pearne was a kindly neighbor, a patient instructor, a loyal friend. His passing is a great loss to radio. Brazil a Growing Market Brazil is a good market for radio receiving sets, according to a trade bulletin issued by the Electrical Equipment Division of the Department of Commerce. There are many crystal receivers of local manufacture in use, the report states but the demand for the larger types of tube sets is growing rapidly because of the general desire of the listeners to pick up Buenos Aires broadcasting stations. In many parts of Brazil it is necessary to use a large receiver in order to hear the nearest station satisfactorily. Practically all complete receiving sets and parts now imported into Brazil are of American origin. The development of the demand for radio receiving sets during the last few years, though impeded a great deal in the beginning by Government regulations, has of late been rapid, the report reveals. Radio enthusiasts have formed societies in Rio de Janeiro,. Sao Paulo and fourteen other cities, thus stimulating interest. Exclusively Licensed by Technldyne Corporation under U. S. Patent No. 1593658, July 27, 1926 Constant Accuracy! ELECTRAD Royalty Variable High Resistances Tests have proven them to be the most accurate and reliable for all circuit work. That's why radio experts insist on them. Note these features denoting quality. 1 — Resistance element not exposed to mechanical wear. 2 — Electrical contact made positive by metallic arm on wire wound strip. 3 — Resistance under control in manufacture and does not change with use. A range for every purpose — desigi Dated A to L. Type E— S2.00. All i other types SI. 50. f\ Write for free hook-up circular h ELECT RAD Quick, easy tuning — more volume, clearness, stability with an X-L VARIO DENSER In your circuit Endorsed by experts, specified In all latest and best hook-ups. MODEL "N" — Micrometer adjustment easily made, assures exact oscillation control in all tuned radio frequency circuits, Xeutrodyne, Roberts 2-tube, BrowningDrake, Silver's Knockout. Capacity Range 1.8 to 20 Mfd. Price $1.00. MODEL "G" — Obtains the proper grid capacity on Cockaday circuit filter and intermediate frequency tuning in super-heterodyne and positive grid bias in all sets. Capacity range. Model G-l .00002 to .OODi Mfd. Model G-5 .0001 to .0005 Mfd. Model G-10 .0003 to .001 Mfd. Price each with grid clips $1.50. X-L PUSH POST— Push it down with your thumb, inpressure, wire is firmly held. Vibrations will not loosen, releases instantly. Price each, 15c. Also in strip of 7 on black panel marked in white. Price $1.50. k diagrams showine use of X-L unit.-; in the new LOFTIN1 ipled radjofrequ ™« Log »nd Cll Book and New 132-p. Catalos with thousands of nationally advertised bargains. Latestioradioatbigsavinffs.WriteforFreecopy. I AMERICAN AUTO & RADIO MFO. CO. HARRY 8CHWARTZBERG, PRES. D»»l. 131 »nnrtcln Hlitio BUa„ Kimn Crty. Ml. , — "Now I know what becomes of little boys who can't remember their A B C's." — "What's that?" — "They grow up and become radio announcers and forget their call letters." NEW YEAR -NEW IDEA I PATENT YOUR IDEAS FREEInventors Recording Blank Confidential Advice. Send Sketch Z.H. POLACHEK gS&^itr'7 MB* 1234 Broadway , NEW VORK^aaaV