Evening Star Newspaper, November 8, 1925, Page 35

D THE SUNDAY John Smith and His Radio STAR, WASHINGTON, D. €, NOVEMBER 8, 1925—PART 1. ' HOOVER'S MESSAGE TO OPEN CONFERENCE 8 FOLLIES GIRL SAYS HUSBAND BEAT HER FEATURING. ATWATER KENT RADIO ROBINSON’S MUSIC STORE, FIFTEEN MINUTES OF RADIO EACH DAY BY JOSEPH CALCATERRA Tne. Main 2231-5934. wE § Call For, Loan Another \Recharge and Return Your Radio Battery, $1.50 Phone Us for Tubes, Batteries, Ete. Open Evenings and Sunday Stanton Battery Service S""'SPEAKER built for permanence 'HE Saal Speakeris built to last a life- time. The bell is of Bakelite, the neck of aluminum. It com- bines volume with a velvet tone, yet costs little more than a cheap speaker. $25. D i | Naticnal Electrical Supply Co. 1 New York Ave. H. G. SAAL COMPANY 1800 Montrose Avenue - Chicago. Now Kurz-Kasch Aristocrat Rheostat— Potentiometer A solid piece of mould- ed Bakelite—Kurz- Kasch quality and work- manship. Rheostat made in 4-6- 10-20-30 ohms. Potentiometers 200-400 ohms. Single hole mounting. See them for yourself at your dealers. The special exclusive des arm gives you unusually smooth and positive action. Ask your dealer for Aristo- crat E-Z-Toon, the keyto simplified tuning. Aristocrat dials, knobs, potentiometers, rheostats, sockets. Ifhe can’t supply, write: 3 Products Tracemark i jot e The Kurz-Kasch Company Largest Exclusive Moulders of Bakelite Dayton, Ohio A SURE GUIDE in transformers is the experience of leading fine set builders. They use more Thordarsons than all competitive malkes combined. Thordarsons run absolutely uniform. Uncond tionally guaranteed by world oldest and largest exclus transformer maker: Recommended by best dealers. Audio freq:(sub-panelor topmounting)2-1, .74-1.84:6-1.84 50 Power Amplity g, Dair $i8. Interstage Power Amp., $8 each. Autoformers. $each. Send for Jsiet hook-up hulletins. JHOADARSON ELECTRIG WER G GHIASQ e ‘ BY FREDERKK C. RUSSELL. Car _owners throughout motoring—anc hace benefited there willing that his fellgw Cxperiences. | Smith fas ‘a facull radio devotees (o follow him in No. 38—On the Bias. When Smith bought two new 45 volt ‘B batteries recently he was ad- vised by the radio dealer to buy a new C battery as well, and before he real- ized it Smith was deep in the subject of grid biasing. hey tell me that a C battery saves the B battery current,” Smith said to the dealel “But I can't see how a small battery like this is going to these big fellows. It isn't log- it's radio,” the other replied. “You see, when you want a tube to amplify it is necessary to keep the grid current flowing without revers- ing the process by having the filament | current flow over to the grid. It is | the action of the grid current that controls the plate current, and the | plate current variations are what you the phones or the loud “I know that,” Smith said. “But the thing that puzzles me is the busi- ness of using a C battery to load up the grid with negative current and then a grid leak to let the negative [current drain off when it becomes ex- cessive. If T were handling this mat- ter I should do away with this grid biasing business and thus do away with the need of a grid leak mith Gets Confused. the deal- ng to hook “You're getting confuis er explained. “You're t up all these devices one tube. Don’t forget that in the average set there ure several tubes, maybe five or Smith couldn’t see that this altered the situation in the least. About all you're telling me is that | in the average set this inconsistency is | duplicated five or six times!” he main- tained: The dealer told Smith that he was all on the bias with the idea, and im- mediately tried to set him straight. He explained to Smith that the grid leak applied to the vacuum tube only when it was used as a detector, and | that the business of grid biasing ap- | plies to the vacuum tube when it is | used as an amplitier. | That simplified matters by eliminat- ing the inconsistency, which really hadn’t existed at all. “Smith next was | apprised of the fact t | action of the transformers, which step | the amj 1 to lose its negative poten- | tial as the voltage on the plate ex- ceeds 50. Under such conditions the grid to attract electrons from he filument, causing a voltage drop from grid to the filament. Then, since | the electrons find a ready path across to the grid, many of them slip through arts the world have followed John Smith by Javs should e Y 1% - findin ‘he Sunday vrnsllh‘(‘ side to the 1 due to the | the voltage applied to the grid of | c tube, there is a tendency | the mesh of the grid wiring and get eving that the experimental work in radio brodcasting is practl- cally finished, Secretary Hoover now | feels that the time is ripe for the in- troduction’ in _Congress of a radio regulation bill which will give| the Department of Commerce suf-| | ticient power to administer radio ac- tivities in the country without handi-| capping the Industry in any way.| | Last year, it will be recalled, he sug. | gested that hasty legislation might prevent or curtail desired develop- ments in this youthful industry. | "The industry itself is now believed | to have become stabilized generally, | while most of its branches, particu: |larly broadeasting services, are oper- {ating efficiently, guaranteeing public e | “Anticipating a_literal flood of bills| { touching upon this or other phases | of radio, the Commerce Department | | will present to the House committee | !on marine and fisheries, which han- |dles radio matters, a comprehensive outline of the legislation regarded as necessary and desirable, early in the next session, which convenes in De- cember. Prior to outlining the proposed radio bill, owever, Secretary Hoover is| anxious to give the representatives of | the industry and its assoclated in- rests a last chance for voluntary action or at least suggestions. Conse- quently the discussion of radio legi lation and regulation will have a prominent part in the national radio conference which convenes in Wash- |ington tomorrow. Representatives of | | the art and industry will be asked for suggestions making for further vol- untary co-ordinated activity through- out the whole radio field. Co-operation has long been the keynote in Hoover's radio policy. As a matter of fact, he could have done little without this co-operation, lacking specific author- ity by law to control the several radio vices or make effective the regu-| lations which the department felt | necessary. At this conference it Is believed many of the still unsettled problems will be adjusted amicably by the interests involved and that fu- ture disputes and controversies will be left to Secretary Hoover or for the iio officials of the dej rtment to adjust according to the draft of the new bill. Secretary Hoover's brief bill, sug- gested last vear, included the fol- lowing paragraph: “The wave length of every radio transmitting station for which a license is now required by law, its power, emitted wave, the cter of its pparatus and the time of transmission shall be fixed by the Secretary of Commerce as in his judgment and discretion he shal deern expedient and may be changed or modified from time to time in his diseretion.” This may prove the basis of any legislation offered this year. Two Artists Share Honors. Eva Gauthie nadian singer, and John Powell, concert pianist, will share honors in the sixth Atwater Kent radlo programs to be broad- cast tonight by WCAP and 12 other connected stations. Miss Gauthier has had one of the best rounded out careers of pres- ent-day concert artists. Born In Ottawa, she manifested from child- hood such pronounced aptitude for izing that at 10 she had already made a_reputation as a child prodigy. Sir Wilfrid Laurier, then gover- nor general of Canada, and Lady Lauricr, devoted patrons of music, decided to send Eva to Europe to complete her education. After four vears under the greatest teachers of Paris and three years with the fa- mous Oxilia of Milan, Italy, Miss Gauthier made her operatic’ debut in Covent Garden, London. She also in_concert in Italy, Belgium, Ance. Holland and Denmark. She decorated by the Queen of Den- mark, an honor bestowed on only four women and never on another foreigner. She has spent three years in the Orlent and mastered the music of India, Siam, Japan, China and the Philippines. Under the protec- tion of the Dutch government she obtained permission to mingle with the 300 wives of the Sultan of Java. Her concert tour of Australla in- cluded more than 100 concerts. Miss Gauthier sang in the Berkshire festival, held under the patronage of Mrs. Calvin Coolidge, in the Spring of last year. Special interest attaches to her radio debut, not only because of her remarkable voice, but also for the unique program scheduled. John Powell, who will join Miss Gauthier in the radio_ concert, is a native of Richmond, Va. He there hegan the study of piano, followed by Jears of Study in Vienna upder the in hu dally radio, and i ‘his ' evening 50 it will pay Now he has taken amused and profit u By out ings: tar" each ipeek. across to the plate. The plate being positively charged naturally attracts the electrons in great numbers, be- cause the latter are always negative. These electrons flow so rapidly tha they form a regular electrical ‘bridge” for the current to flow from the plate across to the filament. Dealer Gives Explanation. “If the tube is to work properly as an_amplifier and prevent distortion, it is necessary to prevent this sort of thing,” the dealer explained. “The easiest way out of it is to connect into the circuit a small dry battery of about for or six volts so that the grid Will be given a negativel potential while the set is operating. You can readily see how by controlling the flow of electrons the negatively biased grid also controls the flow of current from the plate to the fRament and how the biased grid then acts as a means of economizing on B battery current.” Smith was ready to see the biasing process in operation on a receiving set. “You need a little more practice ahd less theory,” the dealer told him. “For instance, if you should ask me how to connect the C battery in order to ac complish this biasing I would tell you to connect the negative side of the battery to the grid return and the attve pole of You'd be he A or storage batte more puzzled than ever. Again Smith Learns. “But just look at this set ber that when you talk plifier tube you start wi of the detector tube or plifier tube. temem hout an am h the output nother am Between the two tubes there is a transformer. Without go ing into details about this you can Jjust picture a prima coll of wire at tached to the plate of the detector tube and to the positive pole of the B battery. Over this primary coil there is a secondary. The current Induced in this coil is fed to the grid of the amplifier tube. But where does the other end of the secondary coil wire o ined the set and found that the other end of the wire went to the negative pole of the little C bat tery. There was no place to connect the other pole of the C battery except to the negative pole of the A battery He couldn't connect it to the positive pole of the A battery nor to the posi tive pole of the B battery, becau like currents will not go together. It was all clear to him after he had seen the set in operation. He had learned more than the mere theory of | grid biasing Next week—No. 39: Potentiometer Pointers. (Copyright by the Ullman Feature Service.) RADIO GOSSIP AND NEWS Austrian masters of harmony and composition. He made his debut in Berlin in 1907, and later appeared in London, Paris and V and 12 other concerts. since con- certized in the leading cities of Bu rope and America. Hoover to Review Radio Parley. Immediately following the adjourn- ment of the fourth radio conference Secretary Hoover will take the broadcasting a personal report progress made and results achieved. Those representatives of the industry and the fans who were unable to at tend will receive an early review of developments directly from the lips of the Secretary himself. The Secretary has been urged to make this talk from WCAP Thursday night. It is believed that a chain of air, on statlons will be hooked up so that u | large number of fans will be able to tune in. Only a three-day se: ference is planned, which would end the sessions Wednesday, but in the event that it runs longer the Secre tary will give a report of progres made up to the time he goes on the Indications are that radio conference yet assembled will meet tomorrow in the hall of the United States Chamber of Commerce, Acceptances already received include - 300 representative branches of the industry, broadcasters amateurs, the press and the listeners. One hundred and fifteen broadeasting stations, 45 papers and mags and many other organizations sending delegates. Canada, Mes and Cuba are to be represented, well as every State in the Union, Arrangements for the details of the program are nearly complete, accord. ing to Conference Secretary Paul S Clapp, one of Mr. Hoover's right. hand ‘men, who states that the pro- gram will be available soon. The department plans the issuance of three lists of broadcasting stations for the use of the representatives and delegates; one by wave lengths, an. other by power rating and the third by geographical districts, including States and cities. No list arranged by call letters, however, is contemplated. on of the con- the largest Radio and Railroads. The railroads of the country are now testing out the practicability of using radio in train control and railroad communication, according to reports from the telegraph and telephone sec. tion of the American Railway Associ. ation convention at New Orleans. Some tests have proved very satis factory, but further experiments are to be ‘carried out by many railroads, Primarily the railroad companies de- sire to be able to keep both ends of their long trains in communication with each other, something accom- plished with great difficulty, on seventy-five to a hundred car traine by means of hand, lantern and valve signals. Difficulties increase, it is ro. ported, on curved tracks, as well as at night and in fog. The application of radio in - ling railroad ferry boats is nxsfinggz‘g considered by several roads, having been tested with good resuits by g Mid-Western road in Wisconsin and Michigan.. The railroad association has already accepted the voluntary service of members of the American Radio Relay League, whose stations are adjacent to the rights of way of certain roads, for handling emergency trafic, Efficlent communication via radio, both on the trains and to and from trains in motion, would aid materially in their efficent operation and increase the safety, it is believed. Hold-Up Call False Alarm. A reported hold-up near Thomas Circle last night about 10 o'clock re. suited in hurried runs on part of Detectives Jones and Brodie and De- tective Barbee and other members of the second precinct command. Toot- ing of horns on the speeding police cars attracted the attention of numer- ous persons in the vicinity of Thomas Circle. Police failed to locate hold-up occupants of an automobile reported to have operated in that vicinity. No person was found who had seen or heard anything of such an affair as had been reported. International Art Topic. Homer Saint Gaudens, director of the Carnegie Institute of Pittsburgh, will give the fourth of his series of dio talks on “International Art” at station KDKA {omQrrow nighty of the many | SECRETARY OF COMMERCE HERBERT HOOVER, Who will formally open the fourth national radio conference tomorrow morning _and preside over its deliber- tions. He also has promised to re. the results of the conclave to radio ience Thursday night through a of stations headed by WCAF HOUSE TO BE ENVOY 70 FRENCH WOMEN American Home Exhibit Will Show Labor-Sav- ing Devices. Europeans By the Associated Press. NEW YORK, November 7.—French housewives who still do most of thelr household drudgery by hand will soon have a chance to study methods of Ame | the same results with little electrical land mechanical servants. A “model American home” mnow being exhibited here will be dismantled and shipped to France to take its part in the International Ixhibition of Household Appliances at the Grand Palais of Paris in December. Electricity, although used extensive ly in France and available in almost any quantity, is confined tirely to lighting purposes. The Amerclan exhibiiton, sponsored | by 30 prominent manufacturers, is the | result of a plea made last Spring by | | an housewives who accomplish Albert Broisat, who ited States by the rench depart. ment of public instruction, under whose ausp the international ex it is to be held The French people know that you Americans have mastered the art of getting your household and office work done with a minimum of human drudgery,” he said, “but they do not know how you manage this. The French housewife who still does her washing, froning, cooking, sewing serubbing and cleaning with her own ands has much to learn from the American woman who us little elec- trical servants for such work." The interior of the model home, which in fact will be an ambassador from the arthside, is de- signed along the of a modest, early American It Is a two story, shingle, hou with 10 rooms and fou The kitchen and laundry are likely to prove won der spots for the French housewife. After the Paris exhibition, the model home will he awarded to the French citizen who has made the greatest con tribution to humanity in recent yvears as a gift from the American people. It will then be dismantled a second time and erected on a site selected by the winner. line home. . New Radio Station Opens. SANTIAGO, Chile, November 7 (&), —The newspaper El Mercurio tonight is inaugur ng its new radio station, CMCA, the most powerful in South America President-elect Figueroa | will deliver the first address. The | wave length of the station is 365 | meters. i KYW Nearly Four Years 0ld. | KYW's fourth birthday will be cele- brated Armistice day, November 11. A continuous program from noon to midnight has been planned. to our directions can be recharged imost en- | s sent to the | OOKING up new batteries every few months is troublesome in it- self—paying for the new ones is still more annoying. WILLARD RAD BATTERIES with an occasional re- charge last for years. Hooked up according ply by throwing a switch to your rectifier. Sales and Service through The Willard Final Plans Made for Radio Ses- sions to Begin in Capital on Monday. Secretary Hoover's annual message to the radio world, including his sug: gestions and recommendations for fu- ture development, officially will open the fourth annual radio conference tomorrow. Final plans for the conference, an- nounced yesterday, call for daily sessions in the Chamber of Com- merce Building, beginning at 10 o'clock. It fis expected that repre- sentatives of the dian and Mexi can governments will be invited to address the delegates after the ope ing speech of Secretary Hoover. Fol- lowing the preliminary addresses, a commiittee on committees will be ap pointed, which in turn will announce nine committees to report on the prob-. lems that confront the radio and broadcasting world this year. Contrary to the procedure followed at last year's conference, when the |opening “session was held at night none of the addresses of Monday will be broadeast. Plans for broadcasting the final reports and findings of the meetings are still under considera tion. Should it be decided to put the closing session “on the air,” an ex- {tensive chain of stations probably will |be hooked up to handle the event | Although it is not certain how long |the conference will last, it is gener lally expected that all the business will be completed by Friday morning | The chief subject for discussion at |the conference undoubtedly will be the |auestion of providing Government |regulations and restrictions to_cover |the broadcasters of the United States. | Superpower is expected to come in for time, be | | full share of the delega cause opponents of the high-power idea are rure to contend for a check on the tendency to continue step- Iping vp. |DENIES RACE PREJUDICE 1S SHOWN BY RAILWAYS |I. €. C. Examiner Recommends | Dismissal of Complaint by Col- | ored Doctor Against Roads. Recommending that the railroads of | the South and the Pullman Co. be | | acquitted of charges of racial dis erimination in transportation of col ored persons, an examiner for the In terstate Commerce Commission today urged dismissal of a complaint alleg £ prejudice on the part of the rail ads against persons of the colored | ace | Reporting adversely on a complaint by E. Crosby, a colored who aske for damages in £120,000, John Me( rd, sfon examiner, said th; crimination or prejuc sons of the colore persons of the white | been shown as that “the commission has diction to award punitive damages.” Crosby the | n added juris exemplary declared, in his complaint filed Januayy 5, 1924, that in 1922 and 1923 Pullman tickets had Leen denied { him and others of his race at various points in the South. Officials of the | Pu n Co. declared th had been no refusal to sell Pullman tickets to | colored persons | Fifty thousand dollars’ damagi | asked by Crosby for alleged d ination in favor of white passengers | at railroad stations in Alabama and Tennessee. Other small damage | claims were made. NAVY CLERK ACCUSED. Filipino Arrested on Charge of Forging Official’s Check. Senor Pedro commissione: med as complain- ant agains nor Donesa, 25 years | old, a Filipino, employed as clerk in { the Bureau of Navigation, Navy De- partment, who was arrested Friday | day afternoon by Detective Darnall | and Springmann and held to answer a | charge of forgery. The defendant is {said by the police to have admitted forging the commissioner's name to a check for $100 that was cashed at Riggs Bank A second check he is allexed to have | | forged is said to have been deposited in bank by an innocent victim who is reported to have advanced Donesa part of the §100, the amount of the heck. The detectives are conducting further investigaf Guevari, n Philippine i RADIO “B” Battery 1, They last for years. 2. They’re re. chargeable. 3, They're casy to install. 4, They farnish the steady current that your set needs to do its best job. they sim- Battery men and their Authorized Radio Dealers | gram slightly in the n { change does not change the Noted Authority on Radio. All Rights Reserved. Watch for Short Cuts in Wiring Your | set und no “C” battery | necting th One of the most important things | Negative that the home constructor must watch in building his set is to use as little wire as is physically possible. There are many ways in which the amount of wire used in connecting several wires or terminals together can be re- duced. Remember that # s not necessary to run a separate wire from a binding post to each terminal with which the binding post must be connected. Your aim is to connect the required ter- minals togther, and to accomplish this aim a single wire running from ter- minal to terminal is sufficient. Bus wiring is simply road building applied to radio set construction. You do not find separate roads running from Chicago or any other large city to every or hamlet. What vou find is a main road connecting to- . - Fig! Fig?2 gether two or more important cities, ind then large numbers of branches from the main road to the smaller centers. A number of terminals which must be connected together are shown in figure 1. The wrong way to connect them together is shown in figure In this diagram the connecting wires are run from terminal to terminal. This makes a poor-looking job and re. quires the use of a great deal of wire. The proper way to connect them tc gether shown in figure 3. In this method a single wire is run through stween the two farthermost points, and_short ting wires are run to this cad” from the smaller terminals, It is often possible to si nections by changing t ten con wiring_dia atter of physi without actually al characteristics. instance, that the switch from positive lead enable you Such ele al connections changing its electric You may find, for changing of your h the negative lead to the of the “A” battery may to shorten the connection a cal characteristics of the circ but it often helps considerably in wiring the set and shortening connection You may also find that where the end of a coil and a condenser terminal are connected together on the wis s diagram it may facilits You connect the end of the to the positive or negativ tery leads as required, and the condenser terminal to the me lead at some other point rather than at the point where the end of the coil joins the lead In most cases transformers are wiring coil dire; “A” bat connect where at the the audio back of the 1 the bindis Reproduction Prohibited. o ng post yond the switch. After you have made your parts lay out, following the wiring diagram as closely as possible, study the wiring diagram you make set easier | trical characteristics. In annc the mos carefully t change > aciual wi-hout c es v advantage, Will Give Results of Radio me.i-‘“‘* Secretary of Commerce Hoover will results of the fourth na-| conference, in Washington adio | through a _chain of s | wie report the | tional | New Worceste: WGR, Buffalc Cincinnati Minneapolis. HOOVER TO REPORT. ra AP. Yori Louis. Canadian Amateurs to Meet. He k, and W and lead and the see anging the elec ou will ference on Air. dio audience will s W Ma: k; St. Special Dispatch to T MONTREAL ity ters has for 1dio te New rince in s Bru ¥, Novemb expected mentioned State the £ Eastern ¢ lay League co; Broadcast Unveiling Rites. The ce chos heen a unswick from and all fro; of the United § athering is to be known as the can Radio Re “anada vent remonie: unveiling of the sta Duarte, 1 can t Ameri Pe; Ha 1n national blic, will of the A Union Wednesday morning William J o'clock ial ged . ur Salesman Is Sued by Wife. The musical p by rder the Limited divorce filed by Helen L. Gray marr a g rocery sale er 26. Amer: Bu principal will be delivered by Secretary of State the United direction annard. whi Tt 1tion: Boston 1 and Star. vember en convention of phers of Ontario, Quebec Nova Edward Island, which is to be or three days, commencing Visitors are the provinces the adjoining Sec of m ate: fon. incidental ue of Juan hero of the Domini be broadcast from n the P WRC November 18, at addre: ic ding t rogr: asked sman d at Petersburg, Va 1918, and have two children charges her John w with A that the husband, the bed clothing Thompson appears s used, con- terminals with the battery Hilda Ferguson, in Divorce Suit. Testifies Dentist Slashed Her Arm With Stiletto. | i i | between battery switch is much casier than bringing a long lead farther in to connect the terminals with the lead at a point be- whether it slightly so as to connections on find that such minor changes can be made to ich tomorrow ay con night headed by k from 9 to 9:30 | in her room will “stand by ations which will be linked with |and nightgown | WCAP for the speech include WEAF, h Spectal Dispatch to The Star | BALTIMORE, Md., November 7 Testimony in the divorce case of Mrs | Hildeguarde Gibbons Ugarte, known | to the theatrical public as Hilda Fer | Buson, now appearing with the Zieg feld Follies in New York, was con pleted this week before George Arnold ck miner the Circui Court Mrs. U, 1919 the arte testifies that she eloped with Dr. Robert Belmor rte, when she was a school girl, and her husba i student at the ive her According to Mrs. Ugarte's mony, she has not heard band in more than four vea {is now in Honduras, Centr Ugarte, who his vears old, whose ¢ arges Dr. U, W desertion. She he Jealous and used to be occasion he cut her with & stiletto, and or her until neighbor the door and ele 2 grasp. She testified h wked b and she was not allow nothing 1 Juds: took the case r testi said was extr t her th it ar choked break i on othe to s street clothes, it @ neg ter WTAC Philadelphia WJ, Detroit; WSAIL | WOC, Davenport; WCCO, | Paul, D, otia Offic to v 1 the Dominican” Minister. m has ates Army Capt. of in a suit Gray against Arthur They Ap: T for This the headquar- | World amateur | an Pavlo been e wife coming home intoxicated, attempted to smother | also cc Attorney PLAN NATIONAL HOME. Maryland Clubwomen in Move fc Blind War Veterans. | Special Dispatch to The BALTIMORE, No tional home for War_w Maryland Fed ubs as the adopted at the district *Auxilia s joined by bers, represent clubs of Balt The new the State. Education the conducting of a. : for such a home will be the w the . BANDITS GET 7 YEARS. Star. nber 7.—A 1 d veterans of the “of Wome resolutior ation a nore and b will be f W, ally the :-| Two Highwaymen Sent to Jail for Long Terms Here. Bond Tor Ju on men saw ining an e street cided to get t was struck dow envelope, whic Three vears the tence Jacks lored Jackson and Edwar red, got physici omas Aller tiary en ye: B: for hi Alber envelope AL Robinson exa nd 1 last ere 11 and the | stitches loudspeaker operation on two tubes/ Price, with two Radiotrons $20 the new power tube RE'S big news for the family that wants a radio set—and a good one—for little cost. Here is the famous Radiola III that has won re- nown from coast to coast for big performance—now at $15. And here is a new dry battery power tube that makes its performance bigger still. This new tube, used instead of one of the WD-11’s, gives far greater volume and power to the set—gives you loudspeaker operation on stations you could only get on the headphones before—on two tubes. And it improves the tone, too—making it clearer, truer than ever. RADIO CORPORATION OF AMERICA NEWYORK CHICAGO SAN FRANCISCO In the Radiola III-A, this new tube may also be used in the last audio stage. With one UV-199 Radio- tron and three UX-120 Radiotrons, this $35.00 Radiola III'A will out- demonstrate in tone quality, in volume and in distance reception, a host of high-priced sets. Ask to hear it, at before you buy Radiola IIIA $35 With four Radio- The new dry battery Radiotron UX-120, needs an inexpensive socket adapter, to make it fit the Radiola III or III-A. Many thousands of pres- ent owners of these sets will be glad to know that they can buy the new tube, with an adapter, and bring their present Radiolas up-to-date. RCA - MADE BY THE MAKERS OF RADIOTRONS 715 12th St. N.W. diola Wholesale Distributor DOUBLEDAY-HILL ELECTRIC CO. Main 4681 NATIONAL ELECTRICAL SUPPLY CO. Electrical Supplies Radio Supplies LiAtE “1328-51330 New York Ave. Automotive Supplies Machinery Supplies Fhone Main 6800 A