Radio broadcast .. (1922-30)

.RADIO BROADCAST ADVERTISER. RADIO Isn't Modern Withcut Automatic VOLTAGE CONTROL See ffiat the electric radio you buy or build is equipped For the AMPER1TE Self-Adjusting LINE VOLTAGE CONTROL. Prevents noisy voltage fluctuations. Improves Reception —Saves Tubes. Write For Useful Bulletin. Address Dept. R B 12 flMPERlTE Corporation ^f 561 BROADWAY NEW YORK AMPERITE Self-Adjusting -\ LINE VOLTAGE CONTROL Why not subscribe to Ratiio Broadcast? By the year only $4.00; or two years J6.oo, saving $2.40. Send direct to Doubleday, Doran &> Co., Inc., Garden City, New York. STATEMENT OF THE OWNERSHIP, MANAGE- MENT CIRCULATION. ETC., required by the Act of Congress of August 24, 1912, of RADIO BROAD- CAST, published monthly at Garden City, New York, for October 1, 1929. State of New York, County of Before me, a Notary Public in and for the State and County aforesaid, personally appeared John J. Hessian, who, having been duly sworn according to law, deposes and says that he is the treasurer ot Doubleday, Doran & Co., Inc., owners of Radio Broad- cast and that the following is, to the best of his knowledge and belief, a true statement of the owner- ship, management (and if a daily paper, the circula- tion), etc., of the aforesaid publication for the date shown in the above caption, required by the Act of August 24, 1912, embodied in section 411, Postal Laws and Regulations, printed on the reverse of this form, to wit: 1. That the names and addresses of the publisher, editor, managing editor, and business managers are: Publisher, Doubleday, Doran & Co., Inc., Garden City, N Y.; Editor, Willis Kingsley Wing, Garden City, N Y.; Business Managers, Doubleday, Doran & Co., Inc., Garden City, N. Y. 2. That the owner is: (If owned by a corporation, its name and address must be stated and also im- mediately thereunder the names and addresses of Stockholders owning or holding one per cent, or more of total amount of stock. If not owned by a cor- poration, the names and addresses of the individual owners must be given. If owned by a firm, company, or other unincorporated concern, its name and ad- dress, as well as those of each individual member, must be given.) F. N. Doubleday, Garden City, N. Y.; Nelson Doubleday, Garden City, N. Y.; George H. Doran. 244 Madison Avenue, N. Y. C.; Russell Doubleday, Garden City, N. Y.; John J. Hessian, Gar- den City, N. Y.; W. Herbert Eaton, Garden City, N. Y.; Henry L. Jones, 244 Madison Avenue, N. Y. C.; Donald Macdonald, Garden City, N. Y.; Harry E. Maule, Garden City, N. Y.; William J. Neal, Garden City, N. Y.; Daniel W. Nye, Garden City, N. Y.; Reginald T. Townsend, Garden City, N. Y.; Dorothy D. Babcock, Oyster Bay, N. Y.; Alice DeGraff, Oyster Bay, N. Y.; Florence Van Wyck Doubleday, Oyster Bay, N. Y.; Janet M. Doubleday, Glen Cove, N. Y.; S. A. Everitt, Huntington, N. Y.; E. French Strother, Garden City, N. Y.; George H. Doran, Trustee for Mary Noble Doran, 244 Madison Avenue, N. Y. C.; F. N. Doubleday or Russell Doubleday, Trustee for Florence Van Wyck Doubleday, Garden City, N. Y.; S. A. Everitt or John J. Hessian, Trustee for Josephine Everitt. Garden City, N. Y. 3. That the known bondholders, mortgagees, and other security holders owning or holding 1 per cent. or more of total amount of bonds, mortgages, or other securities are: (If there are none, so state.) NONE. 4. That the two paragraphs next above, giving the names of the owners, stockholders, and security hold- ers, if any, contain not only the list of stockholders and security holders as they appear upon the books of the company but also, in cases where the stock- holder or security holder appears upon the books of the company as trustee or in any other fiduciary re- lation, the name of the person or corporation for whom such trustee is acting, is given; also that the said two paragraphs contain statements embracing affiant's full knowledge and belief as to the circum- stances and conditions under which stockholders and security holders who do not appear upon the books of the company as trustees, hold stock and securities in a capacity other than that of a bona fide owner; and this affiant has no reason to believe that any other person, association, or corporation has any in- terest direct or indirect in the said stock, bonds, or other securities than as so stated by him. (Signed) DOUBLEDAY, DORAN & COMPANY, INC. By John J. Hessian, Treasurer. Sworn to and subscribed before me this 17th day of September, 1929. [SEAL] (Signed) Frank O'Sullivan Notary Public Queens County No. 1501 Certificate filed in Nassau County Term expires March 30, 1930 ACT - RADIO TUBES Reasons for Actron's nation-wide popularity Tone quality Long life Uniformity Tvfon-microp honic Finest processes of manufacture Call your Jobber or write us direct for complete ACTRON dealer information. The ACTRON CORPORATION 123 N. SANGAMON ST. CHICAGO, ILL. POLYMET puts another year behind — the greatest in its history Over 80% of all the radio manufac- turers turned to Polymet in 1929 for standard radio essential parts. Starting right where 1929 leaves off, Polymet will strive in 1930 to occupy an even more dominating position in the radio parts industry, by continuing to offer the same un- approachable Quality, incompar- able Service, and unexampled Dependability in CONDENSERS RESISTANCES COILS and other POLYMET PRODUCTS Polymet Manufacturing Corp. 837 East 134th Street New York City • DECEMBER 1929 • Here's the Answer to every question about the principles, methods, or appar- atus of radio transmitting and receiving. A Complete Course in Radio Operation in a Single Volume. THE RADIO MANUAL A New Edition Complete new chapters on aircraft radio equipment; Practical Television and Radiomovies with instructions for building a complete outfit; radio interference; 100% modulation; latest equipment of the Western Electric Co.; the Marconi Auto-Alarm System; and many other develop- ments of the past year. All this information is added in the: new edition and, besides, the entire book has been brought right up to date with much new material. The Radio Manual continues to be the one complete and up-to- the-minute handbook covering the entire radio field. A Handbook for Students Amateurs Operators Inspectors 20 big chapters cover: Elementary Electricity and Magnetism; Mo- tors and Generators; Storage Batteries and Charging Circuits; The Vacuum Tube; Cir- cuits Employed in Va- cuum Tube Transmit- ters; Modulating Sys- tems and I OO% Mo- dulation; Wave-meters; Piezo-Electric Oscilla- tors; Wave Traps; Ma- rine Vacuum Tube Transmitters; Radio Broadcasting Equipment; Arc Transmitters; Spark Transmitters; Commerical Radio Receivers; Mar- coni Auto-Alarm; Radio Beacons and Direction Finders; Aircraft Radio Equipment; Prac- tical Television and Radiomovies; Eliminating Radio In- terference; Radio Laws and Regulations; Handling and Abstracting TraiSc. An immense amount of information never before available including detailed description* of standard equipment is presented. Prepared by Official Examining Officer The author, C. B. Sterling, is Radio Inspector and Examining Officer, Radio Division, U. S. Dept. or Com- merce. The book has been edited in detail by Robert 8. Kru«e, for 6ve years Technical Editor of QST., the Magazine of the American Radio Relay League. Many other expert! assisted them. Free Examination The new edition of "The Radio Manual" has just been published. Nearly ooo pages. 369 illustrations. Bound in Flexible Fabrikoid. The coupon brings the volume for free examination. If you do not agree that it is the best Radio book you have seen, return it and owe nothing. If you keep it, send the price of $6.00 within ten days. Order on This Coupon D. Van Nostrand Co., Inc., 3SO Fourth Are., New York Send me the Revised edition of THE RADIO MAN- I UAL for examination. Within ten days after receipt ' I will either return the volume or send you $6.00, the I price in full. (Radio Broadcast 12-29) Name St. &No City and State • 123