Radio broadcast .. (1922-30)

718 RADIO BROADCAST ADVERTISER 12-Cell-24-Volt Storage'B'Battery Positively given free with each purchase of a WORLD "A" Storage Battery. You must send this ad with your order. WORLD Batteries are famous for their guaranteed quality and service. Backed by years of successful manufacture and thousands of satisfied users. Equipped with Solid Rukbtr Case. an insurance afraingt acid end leakage. YoupaveoOpercentaodBeta 2-Year Guarantee Bond in Writing ' „ "tell their friends." That 'a our bent Proof of performance, bend your order in today. Solid Rubber Case Radio Batteries 6-Volt. 100-Amperea 511.25 6-Volt. 120-Amperes. ..... 13.25 6-Volt. MO-Amperea 14.0O Solid Rubber Case Auto Batteries 6-Volt, ll-Plate $11.25 6-Volt. 13-' late . 12-Volt, 7-.'Iate . 16.OO Send No Money fc' • 17 order la I subject to S ill ehiDday order is rec press C. O D., subject to your examination on arrival. FREE "B" Battery included. Approved and Listed as Standard by Leading Authorties torlea, Popular Science Institute of Standards. Popular Radio Labora Extra Offer: 5 per cent discount for caab . . in full with order. Buy now and tret a suar Y 1 1 t. nil teed batter _• at 50 per cent savins' to you. aod Le" WORLD BATTERY COMPANY 1219SO. WabasliAve., Dept. 24 CHICAGO, ILL. World STORAGE BATTERIES S. t your Radio Dials mt 210 metera tor the new 1000 Salt World Storage Hattery tation. WSBC. Chicago. KFAF* TARTS; f BOOR-VPS: SET JBltf Catalog & Guide • Send now I FREE book for this valuab Fullofadv . hook-ups, parts and kits. I A real guide. Shows fac* I tory built sets and the new I ideas in radio. Send at I once. No charge. No I obligation. Please in I dude name of radio fan. I BARAWIKCO. 102-109 S. Canal St. Chicago " It gets that last mile" IRGAP SOCKET Will rid your set of those squawks, howls and frying noises. They prevent closed circuit absorption of current, inter-coupling of circuits, feedback and undesirable capacity. THEY MAKE ANY CIRCUIT more stable and sharpen tuning, resulting in purer and clearer tones with more volume particularly on distant stations. At all dealers 75c each Sent direct if your dealer cannot supply you. AIRGAP PRODUCTS CO. MFR. <\. 188 N. J. R. Rd. Ave., „ Newark, N. J. e^Y~ ., success, and next year — or whenever you decide to have another week of international tests — let's hope that there will not be so many bloopers If they all make sets described in RADIO BROADCAST, there certainly will not be. Very truly yours, G. JOHNSON. Bloomington, Illinois. A Setback to the Florida Boom IN MANY districts code interference has been materially reduced through a general cooperative campaign of the newspapers and magazines which circulate in those areas, in which pressure was brought to bear on the offenders. There are still too many districts, however, where broadly tuned transmitters are a source of constant annoyance to listeners of both local and distant broadcasting stations. The Florida peninsula, it would appear, from this letter suffers badly from coast to shore interference. Editor, RADIO BROADCAST, Doubleday, Page & Company, Garden City, New York. Sir: Ship to shore transmission is responsible in this locality for the worst form of interference encountered. "Sparks" will sit on the key at just about the time the broadcast program is at its best, and often it seems as if he had held up his work to fill the air between then and twelve o'clock. The wonderful New Year's treat from wjz was perfect as regards volume and modulation, but all through the stellar offering of McCormack and Bori there was only one brief song not ruined by code. Very truly yours, FREDERIC B. HYDE, Miami, Florida. A Letter from the Philippines ^TAKING Horace Greeley's "Go West" 1 thoroughly to heart, apparently irrespective of any human element, one copy of RADIO BROADCAST has monthly wended its weary way right out to the Philippines, there, we presume from that so enthusiastic letter following, to be eagerly read by at least one "satisfied customer." The letter: Editor, RADIO BROADCAST, Doubleday, Page & Company, Garden City, New York. SIR: I have already received the new size November and December numbers of the RADIO BROADCAST. I want to congratulate you on the progress and success your magazine is making. It is the best magazine of its kind that I have ever yet seen and so cheap that anybody can afford to subscribe. Its articles are very interesting and highly instructive. Its hook-ups are all "knockouts." Before I subscribed to this magazine ! hadn't an inkling of radio; now I am proud to say that I am the first home-constructor in this province. The department "For the Radio Beginner" should be continued as it is always very instructive to the novices and fans. Wishing you a prosperous year for RADIO BROADCAST. Very truly yours, JUAN CARBALLO. La Carlota, Philippines. f Tested and approved by RADIO BROADCAST Convert your present radio receiver into a light socket set with a Balkite Trickle Charger and Balkite "B" FANSTEEL PRODUCTS CO., Inc. North Chicago, Illinois Thorola Receivers and Speakers * Must Outperform Reichmann Company, 1725-39 W. 74th St., Chicago fbe Distortionless Jfmp/ifi Insure distortionless amplifications and a clarity of tone not obtained through any other resistance. All capacities 12,000 ohms and up. List price $1.50. Special sizes to order. Write for full information. Crescent Radio Supply Co. 1-3 Liberty St., Jamaica. N. Y. $6.50 APOLLO Parlor Model Stands 22 inches high, has a ten inch bell, gives faithful reproduction and may be varied from a whisper to a torrent of sound by the adjustable unit control without the least loss of the sweet mellow. clear tones that are found in the Apollo Speakers. Mail orders promptly filled. Send no money, just pay the poitman. HARD RUBBER PANELS Size 10.. 12.. U.. 18. 21. . 24. . 26. . 30.. Black .32 .39 .42 .56 .64 .75 .85 .96 Rix Radio Supply House, Inc. 5505 Fourth Ave. Dept. 45 Brooklyn, N. Y.