Indianapolis Times, Volume 36, Number 236, Indianapolis, Marion County, 12 February 1925 — Page 16

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RADIO DEVELOPMENT IN EUROPE

Bu KEA Service broadcasting is developing ■ I in Europe, despite the governmental restrictions, is the word brought back by E. A. Brofos, European commercial manager of the International Western Electric Company. “Although installation of receiving sets is. illegal throughout .the continent,” he says, “the prohibition is generally disregarded. “Reluctance of nations to modify their radio laws has b en due to expected interference between broadcasting stations in the several countries, and concern lest removal of restrictions should cause an excessive Importation of foreign-made apparatus. “The usefulness of radio ns publicity for the government Is probably a factor in the coming development, "This is illustrated 'in the attitude of Czechslovakia, which sees in radio the means of building up Prague as one of the outstanding musical and cultural

PATENTS ARE GRANTED

WASHINGTON, Feb. 12.—Seven patents on radio inventions were granted by the Patent Office during the past week. A brief description of each of these inventions follows: Radio Cabinet (No. i,B24,loS>—lnvented by Joseph A. Rayder of Philadelphia, Pa. An object of this invention is to provide a cabinet which effectively insulates the enclosed reproducing instrumentalities from extraneous influences tendering to interfere therewith and mar the clarity of reproduction. Rheostat (No. I,s24,2sß)—lnvented by Arthur Atwater Kent of Ardmore, Pa. This invention provides a rheostat with a multiple point engagement between handle, knob or cap and the base or fixed number. Wireless telephone System (No. I,s24,4l3)—lnvented by Morton W. Sterns of New York, N. Y. The main object of this invention is to provide apparatus and system for sending and receiving at the same time. Amplifying System (No. 1,524,581) —lnvented by John Scott Taggart of Ilford, England. This invention provides an amplifying system using a thermonic valve in which the natural coupling eapae.ty between the anode and the grid electrode and their respective circuits is supple-

■ 44 N. Penn. St. An Air Bridget TO HAPPINESS with a WARE NEUTRODYNE Radio Receiver It Will Bring the Wonders of the Air Right Into Your Own Home From Everywhere HAS SELECTIVITY EASY TO OPERATE LOUD SPEAKER VOLUME OUR TERMS $ 7~ DOWN and Mm■ s2= a WEEK PAYS FOR ONE Price of Set Only $£C Less Accessories, Which Are Cash y/flj F~xge Home Demonstration Arranged

centers of the world. The national opera of Czechoslovakia from Prague may be only one of many national musical programs broadcast regularly over Europe. “In England alone Is broadcasting well organized on a scale comparable to that in the United States. “England’s system, most extensive in Europe, centers about the British Broadcasting Company, which now operates bout seventeen stations. About tOO,000 people are paying a prescribed license fee to the government: and part of this fee reverts to the broadcasting company. The English stations axe sending out excellent programs which are enjoyed in other countries of Europe. “Sweden has enjoyed broadcasting for two years. The Telegraph Administration has plans for a comprehensive system of stations interlinked by telephone lines. “Great progress In broadcasting has been made in Germany during the last year.' Plans are

mented by a condenser, another and distinct condenser being employed to balance out the reaction effects. Modulation System for Oscillation Generators (No. 1,524,629) —Invented by Alexander Nyman of Wilkinsburgh, Pa., gnd assigned to Westinghouse Electric and Manufacturing Company. This invention relates to Improved means for modulating the radiate waves without materially varying their frequency. Receiving Apparatus for Eliminating Static (No. 1,524'645) —Invented by Marius Latour of’Paris, France. The object of the circuit arrange' ment of this invention is to reduce the disturbances caused by atmospheric discharges and particularly in case continuous waves are used and the receiving is registered. Connection of High-Frequency Alternators for Radio Signaling (No. 1,524,646) —Invented by Marius Latour of Paris, France. The object of this invention is to balance the currents of driving motors of the alternators doupled together, and to bring action under particular conditions upon the circuits of these motors. (Copyright, 1925, by Stevenson Radio Syndicate.)

THE INDIANAPOLIS TIMES

under way to organize a power carrier broadcasting service, supplying subscribers with receiving sets on a rental basis. “Holland has no less than seven broadcasting stations, operated by electrical concerns and other industries. “Denmark and Hungary have not had much success with radio. In Denmark broadcasting was started by amateurs early in the and. ys off the art. The service waspoor, due to inefficient equipment and unsatisfactory programs, and the publie has: become somewhat skeptical. “An occasional program from a 250-watt station has been Hungary’s only taste of broadcasting, although a 2-kilowatt station is to be cut into service for operation by the postoffice. “Plans are under consideration for putting broadcasting on a commercial basis in Belgium by having private companies control the service. At present both the army and aviation force operate broadcasting stations. “A recent combination of

Polarity Test

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If the battery terminals are unmarked and the wires from them become mixed, an easy way to tell which is negative and which is positive is to test them in salt water. Add some table salt to a tumbler of water, and with the wires connected to the battery, place the open ends in the solution. .The terminal around which bubbles arise is the negative end. Value of a Wave Trap A wave trap is a cell shunted by a condenser, inserted in series with the antenna lead-in or ground wire of the receiving set to eliminate in terfercnce. By tuning the wave trap to the wave-length off an interfering station, the undesired signals can generally be eliminated. The wave trap offers high impedance to the wave of the undesired station and at the same time offers normal impedance to the station the operator wishes to hear. A good wave trap for use on the wave-lengths used for broadcasting can be made by using a honeycomb coil No. 75 and a twenty-three-plate variable condenser with vernier contral. If interference is caused by a station losing higher wave-length than employed by broadcasting station, a larger honeycomb coil should be substituted. Gym Class Totals *,OOO In the short time that the Y. M. C. A. setting-up class has been broadcast by WLW more than 300 letters have been received from appreciative radio members. Radio authorities state that one out of every ten radio fans write in, and, based on this ratio, the Central Y. M. C. A. radio gym membership is in excess or 3,000.

broadcasting groups in Italy will probably give that country the most progressive radio development. “Broadcasting of publicity matter in Spain, which is permitted by law, has made it possible fer a universal broadcasting company, formed of all the various interests in the country, to make contracts which put broadcasting upon a commercial basis. There are two stations, one in Madrid and one in Barcelona, with one to be installed at San Sebastian. “Switzerland has no organized broadcasting service although there is a 500-watt outfit at Zurich and another station is expected to be installed at Basel. “In the Baltic States there is no regular broadcasting, but steps have been taken In Esthonia and Latvia looking toward establishment of radio. ‘Several stations are planned for Austria, but at present this country has only one 1-kilowatt station, operated by a broadcasting company.

BANDS ARE CROWDED Zurich Statons Meets Difficulties in flxtef Wavelength. ZURICH, Switzerland—The band of radio broadcasting waves is apparently nearly crowded In Europe as In the United States, and the Zurich station is having a hard time finding a frequency that will not conflict with other transmitters. At first it used a wave 515 meters long, but Vienna, at 530, complained of interference. Next 505 meters was tried, but this conflicted with Berlin. The most recent attempt is on a 650-meter ■ wave, but it is learned that Vienna, crowded by Milan, is considering going over into the six hundreds, which may mean that Zurich again will have to change. Cornets to Radio A nationally known corset manufacturer at Bridgeport, Conn., is now making radio apparatus. A food corporation in New York and Kentucky also is planning the manufacture of radio apparatus. And so it goes. Tiny Power hi Air It would take 40,000,000 radio aerials to pick up and combine enough radio energy to light a forty-watt lamp. The average signal received by a radio set has as low a pressure as .001 volt. The filament battery may have become discharged.

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When Trained Ears Listen! Do you think TITO SCHIPA, of the Chicago Grand Opera—the world’s leading lyric tenor, Jf ’V has a good ear for .music? jjL, D* sa Y B of his B-T NAMELESS, installed in the Congress Hotel, Chicago, a few blocks from several broadcasting stations: “After usin g several other well-known radio receiving sets and discardJP* Batt J e to say that lam pleased with your set is speaking mildly. 1 he volume, selectivity, quality of tone and ease by which distant stations were tuned in whilst the other Chicago stations were radios casting is simply marvelous and almost beyond understanding. “I suppose tjou will hardly believe me when 1 tell you I tuned in , rt T' two stations my first night, Monday, December Bth 1924, including one Pacific Coast station, KHJ.” v He’s only one of many opera stars who pre* C- fer the NAMELESS to any other set. £ru““oT£d r A u '.° rd “Better Tuning.” * sufficient 48 page* of Diagram*, Sav **B~ T** to your dealer Hook-ups aod Timing ' dealer*, or sent BREMER-TULLY MFG. CO. I .... „ I 532 South Canal Street CHICAGO

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NEW STAIN UNDER WAY Jewett Company Plans td| Enter Field, Jewett Radio and Phonograph Company will enter the broadcasting field with a station of tremendous power, it has been announced. The details were explained in a statement by Howard E. Campbell, chief radio engineer and general manager of the broadcasting division of the Jewett company, and until recently similarly connected with the Detroit News station, WWJ. “For some time,” said Campbell, “it has been the conviction of Mr. Jewett that the radio manufacturers should take the responsibility for supplying fine quality programs to the public. Acting on that belief, he decided to incorporate the finest broadcasting station possible in connection with his new factory being erected in Pontiac. “We have ordered a 5,000-watt broadcasting equipment from the Western Electric Company and hope to have the station in operation on or before June 1.” While the transmitting apparatus of the new station will be at Pontiac, the studio win be in Detroit. The twenty-six intervening miles will be connected by a number of telephone circuits to be used exclusively by the new station. / . Wave length and call letters will be announced shortly. U. S. PROGRAMS FAVORED^ South American Electrical Market Is Studied. Bu Times Special WASHINGTON, Feb. 12.—American broadcast programs are weH liked in Curacao, Dutch West Indies, R. A. Lundquist, chief of the electrical division of the Department of Commerce reports. Lundquist Is making a survey of the electrical market in*South America. Trust Hearing Soon The Federal Trade Commission has notified eight of the largest ra-dio-firms in the country that their monthly hearingvyill come up March 18. The charge is these companies have combined to restrain competition.

Phone Cl rcle 3530 I FIX ’EM RADIO-DOC Radio and Electrical Service 711 N. Alabama St. Aerial Specialist