Evening Star Newspaper, September 20, 1925, Page 34

“THE SUNDAY STAR, WASHINGTON, D. C, SEPTEMBER 20, 1925—PART 1. CANADA AND AUSTRALIA NEW RADIO STATIONS g sl ARE GIVEN PERMITS Take 57 Per Cent of All Exports, D T Authority for Public Broadcasting by Bledsoe Company at Show—America Leads in Field. El Paso in List. B RADID WEEK. | IDEA IS ADVANCED Co-Operation Throughout Whole Country Need to RADIO’S BEST OFFERINGS TONIGHT. Musical program by Maj. Edward Bowes and the “Capi- tol Gang,” direct from Capitol Theater, New - York City, WCAP, WEAF, WEEI WJAR, WWJ, WCTS and WCAE, :20 to 8:15 o'clock. “Cavalleria Rusticana,” with professional cast, chorus and complete orchestra, WGBS, 7 o'clock. LONG RANGE RADIO ENTERTAINMENT SUNDAY, SEPTEMBER 20, 1925 Programas of Distam Stations Scheduled for Eastern &tandard Time John Smith and His Radio BY FREDERICK C. RUSSELL Car owners throughout the world have fulloYoed John Smith in his daily motoring—and have benefited thereby. Now he has taken up radio, and (s willing that his fellow fans should be amused and profit by his evening experiences. Smith has a faculty for “finding out things” so € will pay radio devotees to follow him in The Sunday Star cach week. 8 TO 0 AM. 8:00—New York: Children's hour: comic stories: muei 9 TO 10 AM. Y.: Watchtower Orchestra; Marion sOpre Bible lecture Rutherford . 9:20—Philadel phis': “Arch “Sirvet Mot “Emacoont o £:30—Cincinnau: Sund; hool " Con 9:40"New York: Chines from Grace Charer:, D00k Concern. 10 TO 11 AM. Meoters. Miles 4643 204 Stations. Canada and Australia together re- .WJIZ celved more than 57 per cent of all the radlo exports frém the United States in 1924, according to statistics made public today by the Department !of Commerce. Canada purchased $2,- 9:00—Rossvilla, N. Brown. 0 s o) No. 32: Function of Wave Traps. In complaining about interference | with the new local station, Smith had | A new radio station at El Paso, Tex., to operate in public broadcast- ing under control of the Bledsoe Radio fnot recomme merely to sh d it. 1 mention i you that it is possib) to get selectivity from a wave trap. s with any other radio unit, by con Put It Over. BY CARL H. BUTMAN. “Whv doesn't the radio industry start a national movement for a bet- ter and greater radio season. at least a greater radio week?"” This question was asked of the writer recently by E. R. Haas, director of the Natlonal Radio Institute, and an exponent of improved radio. 3 “The moving picture industry,” he continued, “has secured the jump on us, but it is not too late to inaugurate a campalgn for better radio.” His plan included securing the co-opera- tion of broadcasting stations, radio manufacturers, radio dealers and fans as clubs and individuals, first to create a greater radio season and eventually make radio a year-round proposition. Through the co-operation of many interests in New York City a_simi. lar but local scheme has been effected and radio week was inaugurated there recently. In the Fall, or perhaps in January. when the second interna- tional radio broadcast tests are planned, a committee headed by H. S. Fraine, jglso proposes a special radio Wants Co-operation. These activities are in line with Mr. Huas' proposition, but he wants co- operation throughout the whole coun- try, and, if possible, for the entire season. = Co-operation, according to Secretary Hoover, was the key-word in establishing the present successful and efficient radio broadcasting sys- tem in force today. It required con- siderable co-operatiori from the indus- try in the absence of definite laws, to enable some 572 stations to operate simultaneously, not forgetting the co- operation from the amateurs. Even greater co-operation would be required in the plan proposed, but the institute suggests we start in a modest way seeking perfection dur- ing one season; expanding the idea later on. by By better and greater radio, we mean better reception, better broad- casting, including improved programs, greater supervision, better sets and more reliable set guarantees. Such a plan, affecting the whole art and industry, would tend to promote radio to even further excellence than it has already reached in its short life. It was only four years ago this month that KDKA went en the air as the firat licensed broadcaster. Primarily improved reception fs up to the fans themselves, and that leglon of listeners will have to look to their sets, setting them in good order, so that they can pick up any new and entertaining programs offered this season. Without a thorough set clean- ing, renovation and possibly some {m- provements, the programs, no matter how good or unusual, will not come in any better than last Fall. Radio lis- teners must also see to it that they are not creating interference by poor operating of regenerative sets. The manufacturers this season promise us many improved receivers at no appre- ciable cost, and while we do not urge the purchasing of new sets, it may be more practical for a fan to buy a new outfit, suiting his own purbe, of course, than to try to patch up or add to his present equipment. Broadcasters Aid. Broadcasters are co-operating in many ways and doing what the other elements of the industry cannot do— transmitting good programs well. That ts, many stations are- keeping the cheap and trashy acts off the air, transmitting clean entertainment and {nstruction at standard frequencies or wave lengths, with added power to overcome static and carry to fans farther and farther distant from thelr stations. Twenty-three statlons of Class B. status are using 1,500 watts or more in an effort to reach farther afleld and provide national broadcast- ing. The commercial stations, as well as those of the Army and Navy, are taking steps to create less interference for the broadcast listeners, and the amateurs individually and through their Radio League are making re- markable progress in a mnew short- wave fleld which may eventually re- move them farther from the proximity to_the broadcast band. Just what can be done during this greater radio season cannot be an- nounced at this date. It is certain, however, that many features of the plan would be well worth while to all interested in radlo, be they listeners or embryo radio experts. The idea it- self seems worth pushing anyhow. RADIO BOOMS IN ITALY, U. S. CONSUL DECLARES Listeners-In Outnumber House- holders 10 to 1—Taxes and Fees: Hold Back Business. In Rome radio listeners-in are said to outnumber householders ten to one. While this statement may be an ex- aggeration, Consul Horace Remillard, Rome, advises the Department of Com- merce that favorable progress in broadcasting has been evident in Rome * since early in 1924, and that increased numbers of radio shops handling equipment of all kinds has been con ocurrent with the growing public favor. The real boom fs yet to come, how- ever, its delay being attributed to the high taxes and fees demanded by the broadcasting company and the long delays experienced {n obtaining - censes. Another present impediment is slowly being removed; the programs offered the public are improving. The completion of two broadcasting statlons In northern ‘and southern Ttaly late in the year are being look- ed forward to as giving a big impetus to radio popularity In Italy. RADIO TEST DATE SET. International Experiment Will Be Held in January. The internatlonal test week, during which American broadcasting stations } be silent for stated periods to per- mit listeners to try to tune in foreign stations, will be held some time in January. The test-week idea was in- augurated last Winter, and proved of keen interest to listeners throughout the entire United States. This year the detalls for thetests will be’ more carefully worked out, and, with in- creased outputs at many of the Buro- n stations, listening in directly on England, France and Germany is ex- pecied to prove an interesting ex- perfence. TO HEAR CONTEST. Hearings in the contest of Magnus Johnson, former Farmer-Labor Sena- tor from Minnesota, against the elec, tion of Senator Schall, Republican, of that State, will be started early next month. ° Lawyers for the two men will be asked to appear next week before the subcommittee, which is composed of Senators Deneen Illinols, ::g&uen Vermont, Republican: Neely] Democrat, West Virginia. Musical program from Mark Strand Theater, WNYC, 8 o'clock. X Wardman Park Little Sym- phony Orchestra, WCAP and other station 15 o'clock. Jack Gardener's Orchestra, WFAA, 10:30-to 12 o'clock. | ates almost two-thirds of the broad- Monastery Bandit Nabbed. “ VI A, September 19 (#).—The | leader of the gang of six which pil- | laged the famous Clstercian l\lunns-‘ tery at Zwettl, in lower Austria, last week has been arrested. | Early in the World War a new means of practically secret signaling was developed by a number of Amer. lcan engineers and representatives of the Army and Navy. It was first termed infra-red signaling, but later came to be known.as “dyscrasite.” It is not radio, but operates through the medium of infra-red light waves, which are fnvisible to the eye. As a conventional vacuum-tube recetver is used for reception and amplification of signals, and because a telegraph key or telephonic apparatus is employed to control a light beam, the system .of communication may be of interest to radio fans. In the Fall of 1916, T. W. Case of the Case Research Laboratories dis- | covered and reported upon the pecu- Har properties of lead antimony su! phide, when the long red rays of the spectrum fell upon a crystal of this chemlcal. First it was tried out in| detecting the approach of electric | cars, or rather detecting their power- | ful headlights, in New Auburn, N. Y. | In this first experiment the tests | showed results at a distance of about | 300 feet. Refinements, however, with better lights, filters and electrical gal- vanometers, " increased the range to about a mile. The Sperry people be- came interested and further tests fol- | lowed under the observations of Army and Navy officers, who evinced in- terest in’ connection with the possi- bility of secret signaling in battle and at sea. A 2-mile test was suc- cessfully conducted both at night and in daylight between the Sperry Build- ing and the Woolworth Tower, and upon reports of this svzcess in 1917 Gen. Squier, chlef signal officer of the Army, suggested a 10-mile test. It was this mere military trial avhich led to the desire for making the re- celved signals audible, and special vacuum tubes were developed. It was found that the pitch of the received signal note varied in wireless head phones with the intensity of the light of the filter. The ultlmate distance reached with this improved means was about 8 miles. . England became interested, and Lord Northcliffe witnessed a demon- stratlon, following which he expressed a bellef that it might serve in front lne trenches as a means of secret signaling. Later, further tests carried the range to 18 miles or from Fort Han- cock, fn New York Harbor, to the Woolworth Buflding, and another test indicated good reception of signuls from the shore to a vessel at sea. The Navy Department, in discussing the possibilities, reported that it might serve as a method of invisible signal- ing between the vessels of a convoy proceeding without lights, and that it would probably be valuable in aiding vessels to locate their positions off shore without using radio. The chlef use to the Navy, however, appeared 10 be as a means of secret communica- tion, when vessels were proceeding without lights or in battle. Its radius of action was found to be about 17 miles, while the cost of a complete set was comparatively low—about $400. This system, aithough not now in practical use, is not discarded—far from it. Tt has been termed ‘“black radlo,” and several other strange and suggestive names. One of its impor- tant features is that it is dfrectional, more like beam radio than. pure radio broadcasts. In recent dyscrasite communication tests light rays are generated by an incandescent lamp, although a gas flame, and an arc light have been used. " The light is situated in front of a parabolic mirror by means of which the divergence of the beam is con- trolled. The whole apparatus is housed in a lightproot case, with an opaque screen which permits only the invisible infra-red rays to pass out of the transmitter. Telegraphic signals are made by means of a shutter oper- ated by a hand key. This shutter is located elther outside the case or be- tween the light and the mirror. Telephonic impulses may be con- verted into light values by speaking against a drum controlling the gas supply, in the gas-flame system, which varies the gas pressure and modulates the light according to voice variations. At the recelving end of the circuit, detection is accomplished at present by inserting a plece of crystal, super- sensitive to infrared rays, at the focus of a parabolic reflector. The crystal forms part of a conyentional vacuum-tube circuit. Variations in the incoming infra-red rays impinging on the crystal alter the constants of the vacuum-tube circuit and produce vari- ations audible in either head phones or_a loud-speaker. Recently perfected dyscrasite trans- mitters are highly directlonal, hav- ing only an 8-degree divergence of beam, which makes for secrecy to 2 certain extent, although limiting its application in general communications. Another limitation of this apparatus is the fact that it is practical only for night signaling, the infra-red rays of the bright sunlight overshadowing fts impulses and paralyzing the detec- tive elements. At night, however, it forms the only known means of com- munication not subject to reception by ordinary means, such as visual, | of the activities of the conference of | take part in the many discussions in radio or sound detection, which indi- cates its value for secret signaling. WRNY Adopts New Systems. WRNY .in New York. has inaugu- rated a new system in testing bands and .orchestras for regular bookings. A speclal instrument has been de- veloped by the chief engineer of the station whereby the audition is given with the orchestra or band playing in the absence of the musical director. By means of a speclal apparatus, the entire audition of the band or orches- tra is taken down on a special phono- graph record which may be heard by the musical director on his return from an outside call. The various bands and orchestras appearing at WRNY are taken down on records and the records are filed 2nd when an orchestra is desired by a musical director, it is only necessary for him to go to his record file. Through this arrangement the direc- tor can get information on the or- chestra and he also, actually. hear play, although the musiclais msay 143,687 worth of radio apparatus from the United States, while exports to Australia were valued at $1,062,707,} Mexico, Japan, Argentina, Chile, Bra- zil, England, Sweden and Cuba were the other principal markets in the order of their importance. The United States at present oper- casting stations of the world. A list of stations published by the Depart- ment of Commerce in the monthly radio service bulletin today discloses that American stations now total ap- proximately 570, while in all the other countries of the world there are only 356 plants engaged in broadcasting. be scattered to the four quarters of New York. WRC Books New Orchestra ¥ newest €onc or el Chwalow and engaged to play throughout the Fall and Winter at the Hamilton Ho- tel, has been booked for weekly radio | concerts by WRC. Mr. Chwalow has | been prominent in orchestral and mu- sical circles in the Capital for several years and has on many occasions formed a little symphony orchestra for special concerts in honor of visit- ing foreign diplomats and statesmen. Included in the new orchsetra is Herman Sevely, cellist, formerly with the Metropolitan and New York Sym- phony Orchestras. WRC also announces that 1t fs mak- ing arrangements to broadcast some the Interparliamentary Union in Washington October 2 to 9. Delegates from virtually every country in the world are expected to attend and to the agenda, which includes disarma- ment, narcotfc traffic and other ques- tions of international interest. Short Waves Used in East Indies. So successful have been all of the| recent attempts at short-wave radio communication as undertaken by ama- teurs that governments other than the United States have joined the throng moving downward from the upper wave bands. The latest addition, radio station ANE, operated by the Government Radio Service Laboratory at Bandoeng, Java, Dutch East In- dles, has begun to make itself heard regularly on the receiving apparatus of amateurs in this country. Fergus McKeever of Lawrence, Kans., has been successful in logging several messages from this station. as has David H. Gustafson of Denver, Colo. What is perhaps the greatest dis-| tance over which this 40-meter trans | mitter has successfully made itself | heard is that between Java and Char- | lotte, N. C., where G. M. Rose, owner | and Odperatdr of station 4JS, has logged several messages. While thus far American amateurs have not succeeded in communicating answers directly to the kast Indian station, these three and many of their fellow members in the American Ra- dio Relay League are bending every effort toward successful two-way com- munieation. In view of the recent records made by NRRL, Paclfic fleet short-wave station in charge of F. H. Schnell, traffic manager of the league, and many amateurs, it is expected that| successful two-way work will soon be a matter of common occurrence. ‘WGBS to Open Opera Season. The second season of grand oper- atic productions espectally planned for broadcasting will commence at WGBS at 8 o'clock tonight -when Mascagni's popular opera, “Cavalleria Rusticana,” ‘will be sung with a cast of well known singers, complete chorus and full sym- phonic . orchestral accompaniment. Like last year, the. operas wiil be sung every other Sunday night in the Gim- bel Brothers’ studlo, in conjunction with Corrlere D’America, the Italian newspaper. H Serafina Scalfaro, soprano, who has just come to this country after tri-| umphs in Italy and who is to sing} with the Chicago Opera Company, | will have the role of Santuzza. The, tenor will be Lodovio Tomarchio, formerly with the San Carlo Opera | Company, singing the part of Turiddu. | The baritone role of Alflo will be sung | by Louis Delle Molle, also once with | the San Carlo group. Lavinga Pugli- | oli, alto, Is to be Mama Luccla, and | | Mario Wrape, mezzo-soprano, will sing Lola. FEATURING ATWATER-KENT RADIO ROBINSON’S MUSIC-STORE, Inc. Mnin_2231-5934 4-in. Dial with 24-in. taper Knob 0-100 0-200 1000 200-0 ‘To have been “firet” ‘Tohave become “first” proves mer:t. Over two hundred Radio Manu- facturers wee Kurz-Kasch producty. The of i p.u.'_ml split bushing all have cembined to eera for mfi--flpfid Koreasch bear this Tovist on Aot o i BZ Teen, achue, ote. cmm't ewpply wrise: I's 10:00—New York: W S 10:30—AHanta: Yo oriey West End Preshytorian Church eervices, Iymouth services e 7 Rorton: Cautioaral Gy Paui’ W York: Seventh Church of Christ, Scientist. ‘se Schenectady: All Souls' Unitarian Chureh services pringfleld: ' South” Congregation. Agoga class prog 11:00—Cincinnati Louisville Chicago: Detroit: he Covenant services.. n Church services service from Orchestra. Hail Paul's Episcopal Cathedral serv 12 NOON TO 1 P.M, Westminster Preshyterian Church se Springs: Central Methodist Church services. . . Atlanta: Firer Preshyterian Church services New York: Marsh McCurdy, concert organist 30—Boston: Concert program .. .. ol 52 12:00—Minneanolis 170 2 PO Recital by Seaside Hotel Trio ...... Musical ~ exercises from Bethany Stnday” Radio Forum " 000 Queens County Christian’ Endeavor 2 TO 3 P.M. Ne ork | New York 2:00—Detro Day News Orchestra ............. Palmer Little " Symphiony *Orchestia fatorio- by {lié S ‘Sunday Hymn Sing” .. ...... usical program from ‘Wamer's 3 TO 4 P.M. ration of Churches ... by Dr. Christian Reisher hime concert ... ..... 'y vocal and instrumients Eniscopal Church: organ; choir Franci ‘musical 4 TO 5 PM. e Orchestra . . © Emelie Seliers eater. . [ 3:15-—Atlantic City from St 8:30—Cleveland: Ivan 4:00—New Yo Philadelnh pianist 4:30—Kansas City oggs every Wall hour 5 T0 6 P.) 5:00—Kansas City: Newman, Royal Drogram New York Philadelphia: Roseland ‘Dance “Orchestra . S Organ recital by Clarence Bawden. . Philadelphia: Benjamin Franklin Hotel Concert Or New York: by Roemer's Homers Louiaville: 'Chriat Church Evensonz Choral servic Pittshurgh: Base ball scores of all leagues 5:10—Minneapo] 5:456—Boston: Park Street Congregational Church 6 TO 7 P Ernie Golden's Hotel McAlpin Orchestra Concert by Bantist Tahernacle Choir * Nathan® Abas' Hotel Penneylvania Concert Or- ervices 6:00—New York Atlanta: New York chestra Kansas_City quirtet —New Vi th York “Titernational " Suniay sehool lasson Musical program by Mai, Edward Bowes and Cavitol’ Gang.” direct_from Canitol Thes N 3 City, WEEL WJAR, WCTS. WCAP, WWJ,. WCAE, rom 5 8:30—New York: Calvary Bantist’ Ch Philadelnhia: Schenectaty Chicago: Or 8:45—Pittsburzh - Cincinnavi Church Philadelnhia Philadelphia New York: Ensemhla 6:50—Atlantic City wervires “How Granny Told Yhe Bihle "Stories” Firat Chiureh” wervi arecital i e as Chureh wervicew /10T Songs and service' from’ Wainut Hills' Christian Bath wterian Church serv Holy Trinity Church Olcott Vail Chielaea “Baptisi Chur rervice 7 TO 8 PO 7:00—New York: ‘Cavalleria Rusticana.” with professional cast chorus and complete orchestra 5 New York: Vocal and instrumentai “recifal Chicaro: Little Brown Church in the Vaie with New York: Polla's Clover Gardens Orchestra: Vo instrumental artists . ... . .. o ..... Cleveland: Sillman Theater ‘Ofchesira . 7:30—Dallas: Firet Presbyterian Church services Lansing. Mich.: Church services ., ... .. Cincinnati: Firet Presbyterian Church service i 7:4b—Davennort: Base hall scores = 7:50—New York: Base ball scores 8 TO 9 P. 8:00—New York: Program from Brooklyn Mark Davenport: Musical program . New York: Celtic Guild concert: atura_soprano S e New York: Asbury Park Symphony ‘Orchestra. . Schenectady: Godfrey Ludlow recital. WJZ and Springfleld: Concert by the Henry Quartet: organ recital vocal soloista S 5 by i Atlantic City: Seaside Hotel Trio: “An Hour With 'the Rossville. N. Y. I B. . A. Choral Singers: Watchtower Violin Choir; Bible lecture hy Judge Rutherford Atlantic City: Hotel Ambassador Concert Orchestra 8:15—New York: Musical program, WEEL WJAR. WCTS. WCAP and WWJ i z 3 8:20—Minneapolia: Second Church of ‘Christ. Scisntist. wervices 3 The Reese-Hughes Orchestra from Hotel Fort Teabelie Henderson, color. WGCP E hestra: violin solos by Arthur’ Dondero orane E 9 TO 10 P.M. 9:00—atlanta: North Avenge Presbyterian Church service: eflerson City: Christian Church serviees . ... ringfield: Program from Hotel Kimball studio’ .. 7 ... 0. York: Munical program: news: WGY and. Cleveland: Evening hour 2 il s " Orchestr New York: Polla's Clover Laine. Irish tenor S e it - 9:30—Dallas: First Methodist” Epistopal Church services Davennort: Church services from East Main Street Ch 9:45—New York: Janssen's Hofbrau Orchestra . 10 TO 11 P.M. and instrumental program_ . - 10:00—Cincinnati 2 ubilee Songs,” by Asbury M. E. Church Atlantie City: Chotr; “organ” ... Minneapolis: Weather: 10:15—Hot_Springa: Sport review: de luxe concert by lineton Hotel Orchestra: instrumental solos. .. Atlantic City: Strand Theater organ res 10:30—Dallas: Jack Gardner's Orchestra 11 P.M. TO 12 MIDNIGHT. 11:00—Hot Springs: Ray Mullins and his Whittington Park Enter- tainers: organ recital by Lawson Rei e Cincinnat arion McKay's Orchestra from Swiss Gani Congregationai Churii and Pantages Theaters House of Hope Presbyterian Church éervices. . WC and his Hotel McAlpin Siring WM CIWEMC WLW Strand Theater. WXYC WO SWMCA SWGY WBZ _WHAR _.WBBR w SWPG WEAF WCCO .WHO wLW WSB WOS _WBZ W7 WEAR Vincent W WKRC .. WPG Wweeo RKTHS LU.WHAR LIWFAA R Co., was given an official permit yes- terday by the Commerce Department. Its call number will be KFXH, and its wave length 242 meters. A new broadcasting station at Bay Shore, N. Y., was permitted today by the Commerce Department to begin operating on the 215,7-meter wave length and with the call WRST. The Radiotel Mfg. Co. is the owner. A portabie radio broadcasting sta- tion to operate at points in Colorado | was given official permtssion today by the Commerce Department to operate under the call KFXJ and on the 215.7- meter wave length. The Mountain State Radio Distributors, Inc., will conduct the station's program. A new broadcasting radio station was_given permission to operate at Nashville today by the Commerce De- partment under the call WDAD, un- der control of Dad's Auto Accessorles, Inc. The station will operate on the 226-meter wave length. Local Radio Entertainment Sunday, September 20, 1925 2 | NAA—Naval Radio Station, Radio, Va. | (134.5 Meters). 10:5 and 10:34 p.n.—Weather repors WCAP—Chesapeake & Potomac Tele- | phone Co. (168.5 Meters). | 11 aun.—Service from First Baptist Church. Rev. J. Porter, pdstor, will deliver the sermon. 4 p.m.—Service held at the Peace Cross, Washington Cathedral. Canon the Washington Cathedral e sermon. to 8.0 pan—Musical program by Maj. Edward Bowes and the “Capitol Gang”_ direct from the Capi- tol Theater, New York City. The | first part of the program will be taken | direct from, the stage of the theater and wili consist of music by the fea tured artists and the Caplitol Grand Orchestra. The second part of the { program will consist of a special pres- | entation by Maj. Bowes of vocal and | instrumental artists direct from the 4| studio in the theater. To WEAF, W WJAR, WCTS, WWJ and g WCAE. . | 815 to. 9:30 p.m.—Wardman Park | Hotel Little Symphony Orchestra. | In addition, assisting artists, Miss Gretehen Hood, soprano: Everett S. Hardell, tenor, and Arthur L. Lamb- | din, baritone. will sing a group of solos and will conclude their portion 4| of the program with a trio, accom | panied by the orchestra. Early Program Monday. 645 to 7:45 am.—"Tower Health Exercises” from Metropolitan Tower, | New York City a.m ‘WRC—Radio Corporation of America. (468.5 Meters). Silent Early Program Monday. 9 am.—Women's hour, broadcast | from WJZ, New York. 12 noon—Organ recital from First Congregational Church, 1 p.m.—Shoreham Hotel Orchestra. . PORTUGAL STATION BUSY. Only One in Country Offering Pop- ular Programs. There is only one radio broadcast- ing station functioning in Portugal devoted to concert or popular radio programs, according o advices to the | Department of Commerce. It is op | erated by a large Lisbon department store. This firm, which a short time | ago purchased an American broad- | casting apparatus, conceived the idea of giving frequent concerts, injecting some commercial advertising. The station call is PIAA. Its wave length is fixed at 320 meters. Al- though the range is calculated to be about 350 miles, it is said, concerts have already been heard in London. 142 937 005 142 183 If vou want work, read the want 463 | columns of The Star. i3 508 AN AN U PR RN Buys This Type L 5-Tube Ware. Neutrodyne Radio Set Regular List Price, $100 Here is one of the finest Radio values we have ever offered! A high-grade Ware set—a tried and reliable Neutrodyne circuit which operates on dry-cell batteries, and these inside of cab- inet—no wet batteries are needed. A sightly piece of furniture — beautiful cabinet of solid walnut. Buy now in time for the World Base Ball Series—a grand stand seat at home, Reasonable Cash Payment Thereafter $2 Per Week This Set Completely Equipped, $89.89 $89.89 buys the above set, Herald Loud Speaker, large size; com- plete antenna equipment; all A and B batteries; 1 C battery; 5 Cun- ningham C-229 tubes and 1 phone plug. NSBURGH&BRO, RADIO BALCONY, STREET FLOOR—7th TO 8th TO E FECTDDTE DD TR BT DT come to hear much about wave trap: plicating it but began to feel as if he were being | trapped himself. He was told a wave | trap was simple to construct and| equally simple to operate. | As its name {mplies, a wave trap, I| Informed him, {5 designed to trap out the wave that fs not wanted. This | electrical device originally came into vogue with early radio fans as means of tuning out interference from | spark transmitters, but since then the | tion has changed somewhat. | ays a radio fan often wants sist him in greater ) ty where, for instance, there may be two stations br sting on very nearly the same v e length You really do not need a wave trap,” I explained. “But it would be well to have un idea of it clearly fixed | in your mind. You must remember that many of these people who talk |V about a wave trap as a necessity are | thinking only in terms of their own | very limited receiving sets. When | our local statfon_is on they find the wave trap indispensable, whereas with a selective set like your own ogn easily tune out the local. ¥du cannot get things very > length without interfer- | have such a wide range lengths to select from you think of complaining That's interesting,” Smith replied. | “But I guess I'll have to buy a wave trap or make one. You're simply tell fng me the function of a wave trap. 1 want to know what it is.” most successful a by putting the cc side a tinfoil-line | sets up certain in hich are bound itself if not > distance in tunin switch firs the T off S0 that the w with the set and terference. Some and retune t results Che cofl should be of resistance | to trap sign “I don’t g mitred. “Wh Interference” of wave logical.” h had_ experie explained. * were try seem 1o be tur you tu lin the | nate the local vo was drowning ou want.” In Explains Wave Trap. A wave trap, I explained, mentary device connected in with the regular tuner of the set. The electrical energy picked up from the aerial is-led first through the wave trap device, and s then fed to the ! tuner of the set. Smith recalled for- mer explanations of the meaning of connecting electrical circuits in series, and quickly v! H ed the wave trap as a device that was interposed be. tween the aerial and the first unit of the receiving set, the tuner. 'The wave trap ftself is just about mple as its location in the hook I went on. “It Is composed of an inductance and a condenser in parallel with each other. An inductance is a length of wire, coiled for conveniern to provide an induction of current other coils placed in its field. The condenser kes care of the ca { When I say the two units ar | nected in parallel I mean that e connected " separately to the and each is connected separately the wire leading to the tuner “About the simplest wave trap is composed of a 23-plate variabie con i denser and a colil de from winding 5 turns of No. 2 D. C. C. (doubl cotton-covered) wire on a cardboard or bakelite tube about three inches in di ameter. About 50 turns of bell wire would be about right if haven't the other handy. You even use a honeycomb or duo-later coll of 25 turns if you prefer. “You cah see that the efficiency of | 41 increased in the wave trap depends somewhat upon | Cuits. high-grad the provisions you make for varying it. If you want to tap the coll at vari- | ous turns, as you would in construct- | ing a simple tuner, you can naturally | LOUIS, Me vary the results of the device. Where | —J. M. Jamerson, a device known as a five-slide tuner is as used to get the.wave trap effect v u“ get ultra-selectivity. but since this ar- | rangement would mean changing the regular tuning of your et 1 should ) ele. serfes Next Weel, (Copyright Consequen made Pre be a desire handle t choose reg: n. A reg tment be a desire on to the National A t0 come in the Bri According tt is a radio sets Wi wom: and Vs purse apea. Or are there spots ing when you have guests in the car? gA little o a litdle Ener, S e e e ENERGINE fied unit. insulaze, condenser Radio Manufacture adio equipment m; killed ncewski was today by a robber who leaped f Best as Separate Unit. “For practical use the wave ate, simpl he set itse S a s d from t sndenser d box. You se ductances in it to Interfere w insulated or away. convenience you sho to short circuit the w ve trap bec: to we use nd the i to trap o but you do not u get what the loca t, which is w No. i Feature U.S. SETS PLEASE LONDON y Plea to Handle Homie- oduct Fails. port rec of the r and Trade sh Isk and quipment field district certain Robber Kills Motorman ., September and severely Spotless Inside? on the seat covers, the upholstery or the inside of the top—spots which are embarrass- Energine will relieve you of that embar- rassment. In fact, it just takes a few moments and gine every now and then to keep the Carry a can in one of the pockets or in your tool kir. 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