Evening Star Newspaper, February 18, 1923, Page 29

‘NATION-WIDE - SUBDUING INTERFERENCE| poaneactiNe STATION Radio Stations Disturbing Each Other|anericen Telephone and Tele- BROADCAST Must End, Is Clamor of Fan, P;)inting to Many Difficulties Being Faced. BY STANFORD C. CR COMMANDER \ (Copyright, 1923 Avoidable Interference among radio stations themselves mus This the tadio fan insistently de- fmands, and the radio fan is rapidly constituting the bulk of our popula- tion—he and she comprise public epinton in popular radio. the larze governmental and al radio operating copcerns appreciate what a vigorous Public opinion new exists through- out the length and breadth of the 1 with respect to radio interfer- especially it affects broad- o the radio fan it {s suffi- nature’s own radio nui- sance, “state,’ in the presence of which it is recosnized we all are more or less Impotent, should hold sway in the realm of radlophone broadeasting during the spring and summer months, Tt Is indefe the radio fa be simulated, during the can fully as hat siwle and unbearable to s effec should fn_small measure, popular radio season of autumn and winter by man-made in- terference in the ether. This attitude ¢n the part of the general pub! is beih logical and reasepable, because that which man is capable of creat- frs ehould likewise be susceptible of being suppressed. “The conditionz preecribed taerefore be attained by all radio operat agencies, whether govern mental or otherwise, and regard 8 of the difficult volved. Virtu- Ay all radio transmitting stdtions Five off mors than one indlvidual Wave when their transmltters func- ion Into their an zot only creats in the ether regular working wave, but alse from ne to fifteen or more onal waves of shorter longth. ing statio o s are of- f development of the radio Iuding the high-power tran. i stations, the low-power coa stations, the 'radiophone broade stations and the amatenr station The high-power statlons are, rela- speaking. the greatest offend- ers of all. because of greater num- roof idual superflious waves £ven o sme of which are of fre anencies ‘equivalent to tha broadeast Wave nd the comparatively great tances from t ansmitiing sta- ons these superfluous waves are ef- fective. Suppression Is Problem. The problem is to suppress th auperdno us waves at th ransmitt ther lves so t they will crence in the cther. al conditions in this respect ong been recognized, and con- siderabla progress as regards their suppression had been made prior to the adv Interferen b radio transmitting stations themselves as well as static nave coasdwated the two prinelpal problems tn radio which the Navy radio uand other responsible radio operating age es have been e voring to s Years. ares most arabla trlegra du nevertheless t teen nstituted ances In rad this time. ential radlo bilged to “carry Interference or rable favorable tial services nd cannot now pend cperations simply have ad to, and must now, carry on day izht throughout’ every day in ot refore, if avoidable d have read. been ted or its effect neutralized ble action toward this desirable end wonld have been taken long ago. To accomplish this result, however, uired intensive investigation and rimentation and. what is most rtant of all, the cxpenditure of Jarge sums of money the varion agencies concer Moreover, sin some twenty elimt yo tended serv- e marvelous of radio | ris condition still application dio in practi- cal services simply went forward by must | enua systems. They | their | se | of the broadcast service. | leaps and bounds and without waiting for desirable refinements in the ra- dlo art. Colncldent with the advent of ra- dlophone broadcasting and its subse- quent rapid growth, very great im- Delus was given to the investigation of the problem of selectlve transmis- slon (and also reception) then being carried gn by the Navy. As & result of these investigations, effective and economical methods have been de- Vvised, by the empioyment of which the most troublesomo Interference given off by transmitting stations, es- pecially that on the shqrt broadcast waves, can now be neutralized at the transmitting stations themselves and therefore climinated at the distant re- {celving stations. - 1 Important Brondeasting. Thus the broadeast service, how- | ever indirectly, has been instrumental in expediting ‘an important advance in the development of -the ragio art as regards Interference elimination which will ultimately prove to be as beneficlal to the radio services which must function continuously as to the services which are at liberty to sus- pend operations at will. If the broadcast service likewise cxpedite or cause to be brought about the elimination of static, or the complete neutralization of its effects, then its fame would in- i deed be assured. One of the measures taken by the Navy to reduce or, eliminate Interfer ence is the modiffcation of its ma: “spark™ transmitters (which gives off a comparatively “broad” working wave as well as superfluous harmonic waves). into vacuum tube transmit- ters. The working wave ef the vac- uum tube sets is very much “sharper” than that given off by the spark sets, but vacuum tube sets likewise give lom perfluous harmonic waves. These harmonic waves will be sup- | pressed at the stations, however, by | the use of special filter circuits asso- leiated with the transmitters so as to pate the enerzy of the harmonic stations and thereby pr their being radiated in space. The modification of the spark sets is being made only gradually as funds become avallable for the pur- pose, hecause several hundred of the ! spark tets are in daily use on board ship and on shore and the total ag- gregate cost is therefore considera- ble. The average cost for making these modifications is about $2,500 per set, but this procedure enables the | utilization of most gf the parts com- | prising the existinB spark kets and |obviates the purchase of complete vacuum tube sets with the resulting expenditures of hu sums of public | funas which otherwise would be nee- | essary. ! should Another of the measures being tak- en by the Navy to eliminate Interfer- ence is_the modification of its exist- | ing arc” transmitters. This type of transmitter is installed on ships of the Navy (and also on merchant ships) and likewisa at v. tually all stations of the Navy's | widely extended chain of stations on i shore, including the high power sta- tions ranging in_locations from An- napolis, Md., to Manila, in the Thil- ippines. Rangt of Arc Transmitter. The arc of transmitter in- stalled at stations ranges in power from 2 kilowatts to 500 kilo- il comparatively recently, the ‘P of transmitter has been one of the worst offenders in radio os re gards the creation of superfluous terferring waves In the ether. 1t not only gave off numerous harmonlc waves, but also other superfluous waves which have been designated as “mush,” and the working wave had | assoctated with it a distinctive “com- ipensating” wave differing in length from the working wave by about 200 meters. Methods have been devised by the Navy radio whereby filtering circuits may also be assoclated with the arc transmitting equipment to suppress { the harmonic, “mush,” and *compen- sating” waves directly at the trans- tting stations and thereby prevent r radiation in space. Modifications to several of the Navy's low and medium power arc stations have already been made, as have also the San Franctsco 100-kilo- watt high power station and the San 0-kilowatt station, & interference from n these areas of large | | population. | made at the Sayville, L. I., 200-kilo- watt station and preparations are be- ing made to apply this method to the Annapolis 500-kilowatt stat: BY RADIO TODAY Sclxc&flc of Wi reless News and Entertainment. LOCAL STATIONS NAA—Naval Radio Statiton, Radio, Va. (710 Meters). bureau report. burcau report. bureau report. ‘WDM—Church of the Covenant (380 Meters)., rning service; cs Wood, pastor. ~Pro of mus -Aficrnoon serv Wood, “In the Ro 345 p.n 30 pa »on by 1 JMountain & p.m.—Evening service; sermon b Dr. Wou yeho-Analysis in oral and Religlous Suggestivene: music by choir of 100 voices. WJIH—White & Boycr Company (300 Metern). 8 p.m.—Services at the Vermont Avenue Christian Church; Ttev. Earle Wilfloy, pastor, on te Be Mappy Though Married”; mu- c Ly choir and mixed and 'male quartets under the dlrection of Wil- liam E. Braithwaite, WiAY—Woodward & Lothrop (360 Meters). fusical vespers at the cgational Church; pro- 4 Harry Edward Mueller, as- cisted by the Washington String Quartet. FRENCH READY TO BEGIN PRINTING GERMAN MARKS By the Aesoclated Press. PARIS, February France is ready, ! under an agreement with Belgium, to set ber printing presses at work turn- {ng out German marks for use In the Twhr if the German government starts @ flnancial blockade of the occupied re- on, the Assoctated Press was informed night on good authority. he original plan to issue an entirely wew currency guaranteed by the re- #ources of the Ruhr has been abandoned “How sermon } ermon by ! | DISTANT STATIONS | WEAF—American Telephone and Tel- cgraph Company, New York ((400 Meters). 30 p.m.—Theatrical benefit pro- gram; band concert. WIP—Glmbel Bros,, Philadelphia (100 Meters). 11 am—Church services. 2'to 5:30 p.m.—Orchestra recital. ric Compasry, | Schenectndy, N. Y. (400 Meters). 11 a.m. and 4 p.m.—Church services. KDKA — Wentinghouse, (360 Meters). 1 a.m.—Church services. 45 p.m.—Lecture. 3 p.m.—Organ recital. D.m.—Vesper services. 30 p.m—Church services, Pittaburgh | WJZ—~Westinghouse, Newark, N. (360 Meters), .30 a.m.—Program of music. a.m.—Church gervices. p.m.—Lecture. :45 p.m.—Concert. 45 p.m.—Stories. :30 p.m—Children's stories. .—Musical stories, followed by 3 ! “Japan Evening.” KYW-—Westinghouse, Chicago - (400 Meters). 10 a.m.—Church services. 2:30 p.m.—Studlo chapel services, 6 p.m.—Chicago Sunday Evening Club servicam. ——— BRIBERY CHARGE UP. The grand jury has under considera- | tion, it is reported, testimony heard | two weeks ago relating to a charge that two residents of Phlladelphia attempted to bribe & colored mes- senger in the internal revenue office Tovause of the numerous complicasions that would arise with two kinds of mioney in circulation when the final set- tlement comes. Thera have heen plenty of marks to neet all requirements in the Ruhr thus £ar, and the French officlals are confi- dent that the Germans wiil not oblige taem to resort to the printing of marks ©n their own account, but if they do the French declare they will proceed to is- Eue all the currency needed and will re- quire the German government to honor #1° when the -Ruhr occupation is termi- ¢ pated, to secure for them blank permits for the removal of liquor from dlstilleries. Whether an indictment will be found by the grand jurors, of course, could not be learned. Tnited States Attorfiey Gordon stated yesterday that he knew of no other proceeding pending befors the grand jury relating to a comspiracy to interfere with the administration of the office of the prohibition enforcement commissioner. Simlilar modifications are now being | | | H | ] | | | WEAF PROVES POPULAR graph Company Achieves Succe! With Musical Programs. One of the most popular broadcast- ing stations in the country is WEAF, the broadcasting _station of the American Telephone & Telegraph Company, located in New York, N. Y. This statlon has a class B license which permits it to operate on a pecial wave length of 400 meters. WEAF has attained particular dis- tinction among broadcasting stations for two reasons: First, because of the variety and quality of the pro- grams offered. and, second, because of the care and attention to details which make its transmission and modulation unusually perfect. In the past season WEAF has suc- cessfully transmitted through the ether. the muslc from several large orchestras. a feat which has been at- tempted by many broadcasting sta- tions with but moderate success. The problem of arranging and plac- ing an orchestra and distributing microphones in such & manner that the music of one particflar instru- ment will not be emphasized unduly is a most difficult feat and roquires the services of experienced transmis- sion engineers combined with' the criticiam of expert musicians Two Outstanding Events. In this respect WEAF's broadcast- | ing of the Capitol Theater Orchestra, which s a frequent feature of its Sunday afterncon and evening pro- grams, and the broadeasting of the Philharmonic Society’s Symphony Or- chestra from the College of the City of New York, are outstanding events in recent broadcasting history. Tho American Telephone & Tele- graph Company’s experlence in long- distance telophone communication particularly fits it for the task of transmitting speeches and music of the finest quality by radio. The tech- nical problems of handling speech currents in connection with transmitter are in many to those met in telephony. tha development work done by engi- neers of the company on vacuum tubes for telephone repeaters is in a large part responsible for the ad- vanced state of the radio broadcast- ing art. Tt was through the efforts of the American Telephone & Tele- graph Company’s engineers that in 1915 radio telephone communication was effected from the Naval Radio Station at Arlington. Va. with the Eiffel Tower in Paris and the Ha- walian Islands in the Pact Many Letters Recelved. A special department is maintained io study and tabulate the hundreds of letters received dally in regard to WEAF's programs. Under a very careful statistical svstem the desires ©of the radio audience as expre ed in these letters are tabulated in such form that they can be studied by the | program department and programs arranged accordingly. 1 Another duty of the statistical staff Is to determine the size and nature of the radio audlence and its geo- | graphical distribution. A surprising number of letters are | received from executives of indus- trial companies and directors of the 'y’ most progressive enter- which indicate what an im- portant Influence radlo broadcasting | bhas on our national life. People in Norfolk ; Terrorized by '=—— Huge Monster| By tie Associated Press. NORFOLK, Va. February Investigators believe that mysterious monster reported to have killed and partly eaten numerous dogs, pigs and other animals in the vieinity of Church- land, Huntersville and West Nor- folk, and spread terror among the Inbabitants, is of the genus cyno- phagotherinus, a distant relative of the alligator thought to have bsen long extinct in temperate climates The Investigators, who have formed a committee to hunt down the strange creature, are hiding their identities under a cloak of anonymity. In a written report to the Virginlan-Pllot they declare that, in their opinion, the curlious beast ventured from his supposed haunts in the great Dismal Swamp in search of a change of diet. Re- ports of the animal's activities in 17— the utes on RADIO GOSSIP AND NEWS Broadcasting stations in Washington, as well as those In various sections of the country are adopting catch calls a means of distinguishing the station and emphasizing its loca- tion. All Washington radio fans are fa- miltar with the catch calls of the lo- cal stations, but many of them who own crystal sets have never heard those of the powerful out-of-town stations. Two of the local statfons are now using catch calls, and others are planning to do the same as soon as they decide on & suitable as well as a novel phrase. WPM of Thomas J. Willlams, Inc., uses “Voteless Wash- ington, D. C."* and suffixes it with “Two blocks from the White House.” WMU of the Doubleday-Hill Electric Company recently adopted the call, “Washington, D. C., the gateway to | the south. , Porhaps the most impresaive of the catch calls of the distant stations are those of WFAG at Minneapolis, Minn., and WSB at Atlanta, Ga. The former station uses “This is the call of the north,” while the latter uses “This is the call of the south.” WDAJ at College Park. Ga., has a more. poetic catch call. This station designates its location as “In the land of cotton, where the sweet magnolia blooms.” The Westinghouse station, KDKA. at Pittsburgh, has adopted’'a catch call which emphasizes that it was the first broadcasting station in the coun- try. Tt is “KDEKA, the pioneer broad- casting statio The catch 11 of WLAZ at Troy, N. Y.. is “The transcontinental and in- tarnational station,” which was prob- jably adopted because the programs of this station have been heard in Eng- land. Seek Co-Operation. A movement designed to effect closer co-operation between radio en- thusiasts and the broadcasting sta- tlons has been launched by the Na- tlonal Radlo Listeners-in Association, according to H. W. Ennes, 901 Var- num street northwest, secretary of the organization. s we all know, radio has come to stay and is becoming greater and be tor in every respect,” sald Mr. Enn “The broadeaster is doing all he can to give ghe public the best kind of entertaifnent possible, although he is under a heavy expense and gets very little thanks for-his efforts. His requests for comments and construc- tive criticlsms are heard but very sel- dom answered. “The listener-in has enjoyed the concert, and says to himsel?, “Tomor- row I will write him a letter. but to- morrow never comes to some of us. Yet If this same station should shut down this very person would be the once to voice his protest along with the hundreds of others. “There must be some medium of co-operation between the broadcast- ing stations and the greatly increas- ing numbers of listeners-in if we are to expect the broadcasting stations to continue giving us the entertainment that we have been enjoying. The National Radio Listeners-in Associg- fon has been formed for this purpose and is doing all In its power to bring this about, along with the other things that the ested In." The association meets sami-monthly at its headquarters at 1100 M street northwest. L. C. Hedges is president of the organizatio Give Chance for Test. Radio operators will be given an opportunity on March 6 to test their wavemeicrs on standard wave signals transmited from the bureau of stand- ards. Beginning at 11 pm., eastern standard time, the bureau will send the general call "QST de WWV Stand- ard wave signals.” followed by the signal “WWV" repeated for five min- the following wave bands: 550 maters, 600 meters meters, 940 meters, 1,150 meters and 1,500 meters. The transmision of the etandard s also will make it possible For Quick Results, alternate “Seventy-seven Number One, your druggist keeps them. D:. Humphreys' “Seventy-seven” is for Grip, Influenza, Coughs and Colds. Medical Book, tells all, free. 30 and $1.00 at Drug Stores, or sent on re. mittance or C.0.D. Post. Humphreys' MOVE SICK CHILD'S BOW WITH “CALIFORNIA G SYRUP" MOTHER! Even Bilious, Upset, Tongue-Coated Children Love this Pleasant, A _teaspoonful of “California Fig Harmless Laxative, and nasty bile right out of the stom- istener-in is finter- { 680 meters, 790 | for any persons having suitable re- ceiving equipment to calibrate their 8ets 50 they may know where to tune for a station transmitting on & given wavelength. About April 1 the bureau plans to transmit wave signals covering the wave frequency range between 300 and 600 meters, and about May 1 be- tween 125 and 300 meters. The exact dates and schedules, will be an- nounced later. To Call Across Sea. ‘Washington radio amateurs with approximately 3,000 others in_the United States and Cahada, who have sufficlent power to transmit dots and dashes across the Atlantic arc now endeavoring to exchange messages both ways with an amateur radio sta- tion in Europe in order to prove that two way communication between in- dividual amateur radio stations of America and Burope is practical under normal operating conditions. The local amateurs are trying to establish communication with the sta- tion of Leon Deloy of Nice, France, between midnight and 12:30 am. every Sunday, Tuesday and Thursday. Deloy's station has promised to send messages to the American amateurs and attempt to pick up their signals on the above-mentioned nights at the time stipulated. 1f communication is established an effort will be made to exchange messages and the successful American amateur will report to the American Radio Relay League. Protests Against Lectures. A protest against the “foolish lec- turo stuff” broadcast by the naval radio station NAA at Arlington 1s voiced in a communication received by the radio editor from R. A. Hein- nichs of 706 Taylor street. The let- ter reads: “Having recently joined the rapidly swelling ranks of “the radio ‘bugs,’ my interest in this fasclnating sub- ject directs my attention at all times i i | record ! to anything under that subject; henc: my notice of & letter written by H. C.’C. Stiles relative to silent night: I certainly am in_ accord with his sentiments and I believe he has word- ed his communlication in such a man- ner that those who might ordinarily be cffended can sce the matter in the right light. . However, he goes to the trouble and prays for silent nights for those with good set: “Being absorbed in this subject, I started at the bottom in order that 1 might gain as much knowledge as possible in radlo, and therefors built a simple crystal set, which cost me less than $8, and, belleve it or not, 1 hear Pittsburgh right often and have heard New York once. My outfit cer- tainly does not come under the head of good sets. “I get all of the local stuff O. K. and when 1 do catch the little symphony orchestra sending out some good stuff from Pittsburgh it is annoying to have some of this phonograph ‘junk’ butt in after it has held sway all day. 1 ofter one sure cure for this evil here, and that is to get NAA to cut out thig foolish lecturs stuff, which may be.listened to by a very few |and does none of them any good, and substitute some good music by & few nearby government bands and make a muititude of folks, some of whom are bedridden and depressed, happy and gratified for some cheer at a time when they need it “Those enjoying lectures can go to them, but don't force them on the radio public. The point is this: When the Marine Band starts to send out real mugle from NAA that sta- tion ehoves fi in so strong that the simplest kind of a set can tune out the rest of the ‘junk’ in the alr. If you do not care to listen to phono- graphic broadcasting, you don’t have to. 1 would suggest that an effort be made to have the Fort Myer Band assigned a couple of nights as well as the Engineer Band. 1 believe the proper application to the proper au- thority would bring results. I woyld like to hear from others along this line to see what sentiment prevails Invents Transmitter. Millions of radio fans will be bene- fited by & new radio transmitter in vi Phillips Thomas, T 100% efficient. pany, possible broadcasting of music and other sounds exactly as produced. It has been used at the Westinghouse broadcasting station KDKA within the past few months, which explains the oclarity and strength of this sta- tion’s signals. The basis of Dr. Thomas’ invention ls the elimination of the diaphragm in all transmitters in practical ser’ ice. In appearance the new trans- mitter resembles a large watch with the front and back covered by wire gauze. On looking into it a point of light can be seen, caused by the flow of the electric energy against one of the terminals. From this fact it is called the glow-discharge trans- mitter. Plans Dally Program. Beginning tomorrow, station WPM of the Thomas J. Williams, Inc., will broadcast the daily Lenten services at Keith's Theater from 12:30 to 1 p.m. The regular weekly concert program of this station tomorrow night will be featured by a complete dance program furnished by the Vo- tomac Melody Bo The program will be under the direction of M. Francis Painter, assisted by Ted Lesser. GRANT GIVEN PRESENT. Detectives Give Chief Flowers and Pen on Birthday. A toy horn blown by Detective Jim Springmann_vesterday called members of the detective force to attention just after completion of the usual morning conference. Stepping to the front with a basket of flowers in one hand and a gold fountain pen in the other, the de-| tective aunounced _ that Inspector | Clifford L. Grant. chief of detcctives, | was born fifty-elght years ago today The inspector stepped forward and was presented with the pen and flow- ers, Springmann making the presen- tation speech and the inspector re- | from him sponding. Subscribers to The Evening Star are insured prompt and regu- lar deliyery—through the thoroughly organized Carrier Service which it maintains. The little chap who will bring The Star to your door every day is alive to his responsibility—and keen to keep his Presiding over each of the many sections into which the city has been gcographically divided is a super- visor—whose duty it is to see that every subscriber in his district is being satisfactorily Served. Every link in the chain—from press to home—is as strong as it can be made—and any failure in its functioning has only to be re- ported to the Circulation Department—Main 5000—to be imme- diate]y rectified. Constructive criticism 1s welcomed. Suggestions for the further betterment of the serviée are requested—for The Star—every individual in its organization—is striving in his per- sonal capacity to publish and deliver a model newspaper in a model way. / BROTHER LOST 34 YEARS MAY BEFOUND BY RADID Frederick Man Hears His Name Broadcast Through Air From Texas. Specia) Dispatch to The Star. FREDERICK, Md., February 17. Missing for thirty-four years, Joseph M. Kaufman, youngest brother of for- mer State Senator George L. Kauf- man. this city, may be brought into communication with his family hers by the means of a recent radio lae- ture on the meat-packing industry broadcast recently from Fort Werth, Tex., and picked up in Lexington, Ky. by a nephew. left his home at Joseph Kaufman Mt. Afry, Md., at the age of nineteen. to make hiz “own way in the world." He was the youngest of a family of nine children, and while he left un- der the most agreeable conditions he told his family they would not hear until he had made “his in the world." The lecture broadcast Worth was by Joseph M. described as a prominent maker.” Joseph Kaufman left the county was a butcher gon of John C. Kaufman, Lexington K; communicated with Senator Kaufman in this city, telling of the Kaufman lecture. Senator Kaufman has written to Fort Worth, Tex., offi cials for information. FAREWELL FOR ALLEN. COBLENZ, February 17.—M. Tirard president of the Rhineland commission gave a farewell luncheon yesterday to Maj. Gen. Henry T. Allen, who repre- ented the United States on the mission. Al the allied hig! foners present fortune from Fort Kaufman ausage when he A 120 0.0.2.2.2.9.9.9.9.90.9.9.9.0.0.0.000800 0 The Zoening Slar andf ItS Efficient Carrier Ser\zice Star—David La 22020 2024 36 2 2036 2 236 224 20 254 26 24 23 54 224 262 20 22 2 202624 265020524 2% * * % - * predicated upon \ Syrup” now will taoroughly clean the little bowels and in a few hours you have & well, playful child agein. Even it cross, feverish, constipated, or full of cold, children love its “fruity” taste, and mothers can rest easy because ft never fails to work all the souring food ach and bowels without griping or up- setting the child. Tell your druggist you want only the genuine “California Fig Syrup,” which has directions for bables and children of all ages printed on bottle. Mother, you must say “California.” Refuse any imitation. * :**********************‘k* Beginning Tomorrow —and continuing in seven issues of The wrence will write upon the intensely interesting subject— “The Truth About Prohibition” —answering the many questions upper- most in all minds—these answers being personal and confidential interviews with officials and laymen who know “The Truth About Prohibition.” @he Foening Sfaf and The Sundiy Star delivered promptly and regularly —to your home Washington’s Birthday Special On next Thursday—w I issue of The Evening Star—will be pub- lished a— Special Rotogravure Section It will commemorate the anniversary we are celebrating with a esting nurtured: and apropos illustrations of the “Father of our Country” and the seat of the government which he loved and ith the regular series of inter- 202020 2026 X456 2624 26 24 26 26 24 2 24 262026 26 26 26 26 236 26 26 2656 2420 2624 26 2026 2 26 26 26 25 2 > %