Evening Star Newspaper, July 27, 1924, Page 28

LEAD IN DISCOVERY Amateurs Among Youth in Experiments Brings Radio’s Greatest Progress. i PATENT OFFICE FLOODED Eleven Examiners Devote Entire | Time to Research in Connection With Wireless Inventions. When Johnny jumps clean the room and knocks dad's paper down, after hours of patient tinker- ing with a refractory radio set, don’t scold him. Some day Johnny may be a great inventor. Even now he pro- claims with eagerness that he has a “mew hook-up that gets WDAP| great.” Some day Johnny's name may | be enrolled down in that big g building which shuts off G street be- tween Seventh and Ninth, which to the minded is merely the United States Patent Office, but to the scekers after scientific truth and the delvers into the realms of physical science is a treasure house of human knowledge brought about by just such tinkering as Johnny had been’ doing before he knocked dad’s paper aside in his youthful exuberance Mi of Johnnies there ,are States, and their names are registered by thousands among the inventions on record in the Patent Office. And many thousands more of the yvouth of the land will find their mong the rolls of successful at the Patent ¢ P at magic finger which siretches ' without wires into the ether hundreds of miles away and brings to the home the human voice, has opened up a new and fertile field for the young invensor The John- nies of radio are taking full advan- tage of the opportunities offered in an inventive way by this new e The voungster “fooling” with a io set, trying out new hook-ups, linking up a selectoformer here and a vario- upler there, is responsible for many of the new inventions that have all but revolutionized 0 since the invention by De Forr in 1907 of the vacuum tube, which has made modern transmission and reception Dossible over great distances. Growth of Radio. From a small division in 1907, con- taining eight and engaged in | Investigating patents not only for radio, but going into many other al- lied fields of electrical communica- tion, the radio division of the Patent Of] has expanded u force of 11 examin. at work all time, who cannot keep pace with the insistent demand for mew patents on adaptations of old inventions und en- tirely new inventions in the radio ficld E. Backus, chief of the di- vision, a4 practical veteran of the pat- ent game, has seen the development of modern radio uas few men outside the technical eng of the radio game have scen it. He has watched the development of modern lio from the granting of the original De For- rest patent for a three-filament tube with grid. the basis for the modern and greatly improved vacuum ube, up to (!\»'mlrudh' and involved so- called “DX" hook-ups that are the d light of the amateur receiver today And Mr. Backus has had many radio freaks before him in hix day-freaks that probably were not meant seri- ously. On the whole, however, the progress of thought in the radio busi- ness, as evidenced by the ever-in creasing grist of patents, has been along sane and logical lines leading | 1o the one end of clearer and better reception and transmission ang. am- plification with improvement of the means used. For radio has made in the fourteen ye Istence just €r the Navy and Mar- coni had been working with the spark transmitter und had achieved fine results with that archaic equi i ment—even now used in improve lorr_n. The rapiq strides made in the | radio art are graphically shown by lhl' patents issued approximately 2.000 having been issued on this one subject ! Reach Penk Points. Radio has just struck its s measured by the Patent Office. the peak of patents issued was ed in 1922 and maintained steady | Pace through the summer months of | that vear, there have been peaks in | 1923 approaching the peak of 1922 tivity, with more to come as radio comes simplified and improved. For the end is not in sight. Radio, according to inventors, has barely been tapped, and its possibilities are as yet unknown. And here is where Johnny comes in. Grizzled old veterans or the Patent Office point with pride to the part ihe youth of the land has taken in radio development, for Johnny and has gang are responsible for the bulk | of the radio patents issued in that | great gray building of Uncle Sam. In other words, the youthful amateurs | “thonkeying” with their home-made | sets have invented more knickknacks which make modern radio possible than the trained scientists working | in_their thoroughly equipped labora. tori The greatest theoretical ad- | vances in radig_art, however, come from the more ‘mature and more ex. perienced rescarch workers, many. of them university professors. i — BOSTON WBZ PROGRAM. | Springfield Station Will Broadcast Musical From Hub. Except for the chime concert which will be broadcast direct from the Campanile tower in Springfield, Mas the concert which WRBZ will radio- cast tonight will be forthcoming en- tirely from the Boston Herald-Trav. eler-Westinghouse Studio, Hotel Brunswick, Boston The program includes a recital by Rita Kerrigan, soprano; an organ re- ecital direct from the Estey Organ Studio in Boston, and a short hymn service requested by the old folks to be sung by FElizabeth Bates, con- tralto, with organ accompaniment played by Arleen Taft. ¢ BOOK REVIEW BY WRC. Mrs. Virginia King Frye to Dis- cuss Tarkington's Novel. A review of Booth Tarkington's “The Midiander” will bhe broadcast from WRC tomorrow afternoon by Mris Virginia King Frye, under the wpices of the League of American Pen Women. Mrs. Howard Angus also will review “Red Sand,” by T. S. Stribling Mrs. Atherton De Puy of the league 1% broadeasting each week from WRC ® soricw of articles on “What Women Today Are Doing.’ oi————— across prosaic as in patent a for radio, t men, I nolv it has a | great strides rs of its real ex- ride, as | While | Tuner Is Adaptable to Modification of Navy Types GOOD FOR DISTANCE Constructor Points Out Achievements With One Tube. BY E. L. CE . A number of articles have been writ- ten condemning the single circuit re- zenerative tuner, but, after all, the fact remains that it is one of the best and volume getters of any developed, with the pos- exception of the reflex. It is adaptable to many modifications ¢ be constructed at a minimum distance circuit vet sible also and ma cost. The set described in this article is a modification of the single circuit and was designed and constructed by the writer. The circuit diagram, however, was taken from one of the leading radio magazines. The results obtain- ed were highly satisfactory. The principal features of the which should commend it to any one wishing a small, compact receiver for outings or home use, are : s essentially non-reradiating ah ma be tuned by the beat mote meth- od with but slight chance of interfer- ingz with your neighbor, especially if 4 short-antenna is used. It is entire- 1y self-contained in a mall cabinet weighing only 63 pounds, complete with all accessorics, and may be used on most any kind of antenna. Some of ghe objects that have been used successfully for an antenna are an automobiie. short clothesline, rain spout. bed springs, a short piece of wire about 15 feet loug thrown on the floor or ground. and in the im- mediate vicinity of the loeal stations without either antenna or ground Cuts Out Local Stations. The set is capable of cutting out the local stations and bringing in sta- tions up to 500 miles in summer, and «a great deal more in winter, on a reg- ular antenna A close stady of the views of <ot will give a good idea of how different wires and equipment placed. H’l\he inside dimensions of the cab net are 3% inches wide, 6% inches deep and 7 inches high p The outside dimensions will de-p\l’!d on the titickness of the wood used in its construction. inch thick 3-ply panel material and covered it with leather. Howeve: 'lh," finish may be left to the individual's taste. ©“The list of parts required for the set are as follows: (The writer would caution you to strictly adhere to all parts and specifications, or you will be unable to get the set in the space provided for it) 3 One 7 by 10 radion panel. one United States tool 11 plate condenser, one 2-inch dial, one Pacent socket for 199 tube, one .60025 Dubiler grid condenser, one Daven grid leak 1% magohn, two 4-inch spider web forms, two small inductance switch arms, 1 radius; two switch points, two switch stops, one 23-ohm cutler hammer resistance, four phone tip jacks, two phome tips, one hmdi!l& post composition nut. one-quarter No. 28 double silk covered wire, ong-quar- ter No. 22 double silk covered wire. 4-foot bus.wire, 15-foot single strang lamp cord, 2 feet of very flexible cov- ered wire, 15 inches flat brass 1-16 by inch, 3 inches 3-16-inch round brass, 2 inches li-inch round brass, one pair phones, one C 299 Cunning- ham tube, one Burgess B battery, smallest size, No. 41 one Burgess C battery, No. 2370, for A battery; one dozen soldering lugs, ome piece hard rubber tubing % inch outside, 1% inch inside, 2 inches long; one cab- inet and baseboard, miscellaneous. as- sortment of wood screws, 4-40 and 6-32 machine screws and nuts. Take one of the spider-web forms, lay out and drill according to fig. 1. Then wind 80 turns of the No. 28 wire on it, with one tap at 40 turns. This is the main inductance. Lay out the other spider-web- coil to fig. 2 and drill wind 36 turns of the No. 28 wire on it. This is the tickler coil; both coils should be wound in the same direction and when finished should be iven a coat- ing of hot parafin wax to prevent them from collecting moisture. Circular Shaped Panel. Next cut a plece of the 7 by 10 panel out in a circular shape and drill according to fiz. 3 for the in- ductance and condenser mount_the groove shown in fig. 3B will have {to be bored out on a lathe. Fifteen turns of the No. 22 wire are placed in this groove and held in by strips of adhesive tape fastened on the face of mount. These wires need not be placed in any particular order. This is the primary winding, | ning of which should | to the acrial and the end to the ground. This coil should be wound in_ the same direction as the other coils. Now lay this aside and cut the piece of hard rubber tubing off 1% inches long and force it on the condenser shaft. Then take the piece of %-inch round brass and ferce it into the other end of the hard 'rubber tube. Be sure that this piece of brass does not_touch -the condenser shaft. ‘This arrangement answers a’ twofold purpose : First, it furnishes an extension for the condenser shaft so that it will reach through the panel, and, second, and most important, it assists in elim- ating body capacity effects. Take the piece of fiat 1-16 by % brass, bend and drill three brackets according to figure 4. One of these brackets, which we shall call bracket F, has a hole drilled in it with a No. 28 drill % inch from one end and in the center of the half in dimension. This hole is mounted nearest the main panel. Now - fasten these three brackets to the circular con- denser mount_with Ne. 4-40 counter. sunk head screws and mnuts through holes D-E-F, then fakten the panel to the condenser with counter-sunk head screws and nuts through holes A B. Holes will have to be drilled in the front set, the the are " be connected Argentina Boosts Radio. The training of radio men in the Argentine navy in helng stimulated By the award of prises (o oper who quality In copying code mew ol 50 words at the rate of 22, 4 and l' words per minute Theme awaver are withheld for b duet and 1€ the man condition. Al od In all radio ashore, wherever there is A8 one opera of the condenser to correspond to these e main inductance is now fastened to the circuinr panel directly over the primary winding with No. 4-40 counter- sunk head :‘on':: through u-li'n:-l-: nter apider-web fi. al hoten 3 3 I the panet The two ende 1o the cut out o oon- Tand The writer used %- | the begin- | THE SUNDAY ST - cthtrtand - 5D Cunk, ~— { are tapped and counter sunk to fit No. 440 counter-sunk head screws. The ends of the tickler coil and the flexible leads are fastened to these screws after it has been fastened to the tickler coil with a No. 4-40 counter-sunk head ecrew through hole J and the hole Bl in the spider-web coll. The end that is tapped 10-32 being at the top of the coil coil is now slipped over the condenser shaft, the side having the small piece of panel fastened to it facing the panel. Be eure that this coil is mounted %o that the wires are running in the same direction s the main inductance. The grid leak mounts are bent and dritled by figure 7. The material may be either phosphor bronze or spring brass % by 1-32 thick. Mount 4 fastens to brucket F and mount 5 o baseboard directly beneath mount A. Preparing Main Panel. You are now ready to prepare the main panel, laid out and drilled by figure 6; shield- ing is not neceseary: care should be used in cutting and’ drilling the panel. It would be best to have your cabinet ready when the size of the panel is cut 80 _that a good fit may be obtained in it. Having drilled the panel vou are now ready to fasten it to the base board and mount the instrument The base board sizes are 1 in. thick, 53% long and 5% wide. The rheostat which is made by fastening the 25-ohm resistance the panel through hole ¢ with a No. 6-32 counter-sunk head screw may be mounted first; the rheostat arm is mounted in hole C and is made by re- versing one of the inductance switch arms on the back of the panel allow- ing the arm to swing across the re- sistance; a washer is placed on each side of the panel to allow the arm to turn free, and lock nuts set up tight to hold it in place. A No. 4-40 screw is screwed into Local Radio Entertainment Sunday, July 27, 1924. NAA—Naval Radio Statien, v (435 Meters). — 10:05 a.m. and 10:05 p.m.—Weather reports. ‘WDM—Church of the Covenant (234 Meters). 10 a.m.—Eyerygirls' Bible Class Miss Mabel N. Thurston, teacher. 11 - a.m.—Morning service; sermon by Rev. W. B. Bryan, jr. 8 p.m.—Evening service; sermon by Dr. Bryan. ‘WRC—Radio Corporation of America (469 Meters). Silent. Early Pregram Monday. 3 p.m.—Fashion -Developments of the Moment, prepared by Women's Wear. 3:10 3:25 editor p.m.—Song recital. p.m.—Current Topics, by the of The International Inter- preter. 3:35 p.m.—Piano recital. 2:50 p.m.—“What Women Are Doing Todav,” by Mrs. William Atherton Du Puy. 4 p.m.—Song recital. 4:10° p.m.—Book review, under the auspices of the.League of American Pen Women. . 5:15 p.m.—Instruction in interna- tional code. 6 p.m.—Stories for Chlldren, by Peggy Albion. WCAP—Chesapeake & Potemac ome. Company (460 Meters). 11 am.—Service from the Mount Vernon Place M. E. Church South. Rev. W. A. Lambeth, pastor, will de- liver the sermon. = 4 p.m.—Open-air services held at the Peace Cross on the grounds of the Natjonal Episcopal Cathedral, at Mount 8t. Alban. Right Rev. Her- bert Shipman, Suffragan Bishop of New York, wili deliver the sermon. €:20 to 8:15 p.m.~—Musical program direct from the Capitol Theater, New York City, by courtesy of the Capitol Theater * management and 8. L. Rothatel (“Roxie”). The first of the program will be taken direct from the stage of the theater. and will consist of music by featured artists and selections by the Capitol grand orchestra. The second 1al presen voeal and will t of & l‘?l': l:.“ from Il'm: by Mr o In the This | to! through hole X to act as a stop for the rheostat arm. The panel bushing. which is left over. is drilled out 1o 3-16 and mounted in hole A, then filed off on the back of the panel to about one- half the thickness of the nut. This furnishes a guide for the tickler ad- Jjusting arm. The remaining inductance switch arm, switch points and stops may be mounted now. also the phone tip jacks, in holes DI-D2 and E.E, D1 and D2 being the phones, and E.E. the antenna and ground connections. The inductance and condenser unit are now mounted with No. 6-32 counter-sunk head screws and unts through holes F1 and W2 the socket and one of the grid leak mounts are screwed to the base board and the other grid leak mount is fastened to bracket F that supports the induc- tance unit A piece of the $-16 round brass is now cut off 1% in. long and threaded which may be cut to sige | for No 1-22 on one end and the other end is threaded to fit the nut of the binding post you purchased, the rod ix then inserted through bushing A and screwed into the tickler, coil this furnishes a means of adjusting the tickler and may be seen very clearly in the views accompanying the article. Soldering Commectionn. The set is now ready to be wired All connections must be soldered, ex- cept the flexible leads which cannot be on account of the fine thread that is braided with the wire. The method of connecting these leads is as follows: A piece is cut to the proper length allowing % inch on each end for connecting. The in- sulation is pushed back from the end until % inch of wire is exposed and a soldering lug is clamped around the insulation with a pair of pliers allowing the bare wire to lay on that portion of the lug that goes over the the panel screw, a washer is then placed on the RADIO GOSSIP AND NEWS Improved national broadcasting, in- terference other than radio, and sig- nificant calls for long-range amateur stations are three of the important questions which probably will come up for iscussion at Secretary Hoov- ers third national radio conference, to be held in Washington soon after September 15. Officiats of the Department of Com- merce are now in correspondence with their field representatives, planning a program of sufficient scope to cover all problems of radio administration 25 it affects commercial, private and amateur radio activities. Each of the nine_ radio supervisors, it fs under- stood, has been asked to submit his Views on certain guestions and 'to suggest subjects for consideration dQuring the conference, which prob- ably will run_at least three or four days. The radio supervisors are tak- {ng up specified questions with local radio interests in an effort to secure their views before the sessions con- vene in Washington. Both the de- partment and the government’'s radio advisory committee are understood to have taken up pertinent problems with the broadcasting, manufactur- 1he " commercial and amateur organiza. tlons, reports from which are now coming i, Ong of ihe subjects to be discussed which has hitherto been left to the Tlacerical industry 1s whether or not the government should interest itself in interference other than radio hat is, ‘gm and light interference and urbances HEYS e ‘other amanating from electrical apparatus. Electrical power and lght companies have been making a study of these Dl’(:‘bl;m. (h!fll.d'um L? date no re a5 been made o the Svernment, so the question of whether In the interest of the international activities of our amateurs and the pride of their transmissions to to 3 tlno n-:l‘-; :: ho ing call letters srowing activity without Intarferin with {nternational regulations. Tacll recently amateurs mever came into Serid- call des| ry datites Spiaeed b o Koy ! -y sax for- sovernment plans countries th Mm WASHINGTON. D. €., JULY 27, Bcrew over the ends of the wire and a nut screwed down tight. The wiring may now be proceeded with as follows: A flexible lead connected from F on socket to rheo. stat arm. A flexible lead is connected from P on socket to top lead on tick- ler coil and a flexible lead is con- nected from bottom lead on tickler coil to phone tip jack D1 a piece of bus wire is connected from 2 and 3 on the inductance to the switch points and a piece of lamp cord is connected from switch arm 1o brack- €t F, No. 1 on the inductance is con- nected to the stutionary plates of the variable condenser. The primary in- ductance is connected as previously described to phone tip jacks E connect the rotary plutes of the vari able condenser to bracket F and the ground connect the grid condemser to the stationary plutes of the varia- ble condenser and the other side of &rid condenser to G_on the socket. a wire is connected from G on socket running underneath socket to the £rid leak mount that is screwed to the buse board, connect the remaining F on socket to bracket F ulso con- nect to the positive A battery with a piece of lamp cord. connect the 25 Ohm resistance 1o the negative A battery with a piece of lamp cord, connect a piece of lamp cord about 12 inches long to phone tip jack D2, and run through a small hole drilled in the base board to the bottom com- partment of the cabinet and connect to positive B battery another piece of the same length is connected to the positive A battery and carried to the bottom compartment of cabinet | in_like manner and_connected to | negative B battery. The remainder of the lamp cord is cut in half and a | phone tip soldered to oue end of each | Diece, these are used to make the antenna and ground conmections of the set. Cheek Over Cemnmectionx. Now check over conmnections very | carefully to be sure they are all O. K. insert grid leak in the grid leak mount. Be sure the rheostat Is turned off and insert the C299 tube |in the socket commect the aerial, ground and phones, turn the rheostat on. The set may be handled in the same manner asany other single cir- <cuit set with but a very slight chance of annoying your meighbors in fact it is so slight that the chances are you never will. Although the writer has spoken of the set as a single circuit it is in reality a two-circuit set, but with the exception of the aperiodic antenna circuit it is the same as a single cir- suit, this feature increases the selec- | tivity of the set and practically eliminate interfering radiation. The writer would be glad to hear from any fans building this set tell- ing of the results obtained and will endeavor to answer any questions, if a self-addressed and stamped en- velope is emclosed. (Copyright, 1924.) € KW is no ‘longer an adentification for the Cubar. station—J. H. Hadley of San Francisco also uses 6 KW. Canada uses numerical calis for_its amateurs, and so does Mexico. The London amateur station, 2 LO, is well known over here, and yet we have a station 2 LO, owhed and operated by Nelson Dunham of Highland Park, are only two ‘There are hundreds of duplicate am teur calls throughout the countries actively engaged in radio communica- tion. Amateurs will also come in for special consideration in the proposed reallocation of wave lengths and co- operation in the organization of a national emergency radio net. Another important question sure to be discussed developed as a result of the convention broadcasts is how to en- courage finst—class broadcasting grams which will interest the whole country as well as a single community. In this connection independent and chain broadcasting probably will come uD, as it is pertinent to national broad- casting today, affecting all listeners- in, and a fundamental problem of bet- ter broadcasting standards “Shall class C stations be permitted to con- tinue on the 360-meter wave? is an- other questions sure to be on the pro- There were 101 of these sta- tions on June 30, most of them serv- ing a single community with medio. cer. material, whereas they might T serve the Mlosubllc if trans- forred to either class B or A or shut down permanently. Limits of power for broadcasters will aiso be dis- cussed in connection with the ques. tion of licensing the contemplated higher-powered stations of 5 and 10 ilowatts Today 1000 watts or 1 kilowatt, is the .limit of sta- tions, and Information as to the prac- ticability and desirability of higher- powered stations is desired. Limiting thl: number lo! . nul: a sl gle community is another Suestion which may be raised ot Other questions include rebroad. casting problems, such as relaying b; wires, as was done 4 th ”m! ransmission u.mtu.-': nels_for 1924—PART 1. Long Range Radio Entertainment SUNDAY, JULY 27, 1924. The Programs of the Following Distant Stations Are Scheduled for Eastern Standard Time 8:00—Chlldren’s hour; 9:00—Rible school; Zien Orchestra . 9:30—First Presbyterian Church services . Bunday *school T A 0145 Areh Btreet Presbyterian Church wervi 0 ™ wervices 10:00—Aacred chimes conce Cathedral Church er St._Thoma; Hadio_ chupe 1 service: Holy Trinity Church services ... 10:20—Central Methodist Episcopal Chure) 11:00—Church of the Covenant Services .. Bt (hrysostom’ Crescent Hill P 11:20—Plymouth ~ Congregatioual Church 45—Puint Lreese Presbylerian Church services . 1 Ax Episcopal Church’ services . bervices | 11 TO 12 NOON. New York Zion, TIl. Hchenectady Cincinnati Philadelphia Pitisburgh : J Davemport 7 Boston New York Omal Philudelphia Deroit Cincinnati Episcopal Church servi Presbyterian Church services, services. . 12 NOON TO 1 P.X. 12:00—First Presbyterian Church services.. 1:00—Les Angeles church services Sermon ‘from KHI studio 1:30—Kadio Bible cans; music: Munical exercises from Organ recital 3 1:45—Concert program iartet 2:00—Chureh sorvices Igews Theater & Sunday hymn sing 2:30—Concert from Attan Parkman Memorial Church services: music Orchestra concert .. E Chapel services fiom KYW & 3:00—Up-tominute base ball scores . Church services; address: music vy Bund of Virgiu lslands Twilight program: musie tor “‘Rebuilding Jerusalem' s 5 Grand organ_recital ... Tieechmont Trio ... .. 5:15—Base ball scores . S Presbyterian Church services 5:30—Dinner « Municipal 2 Cuureh choir music red Quartet ... Abax' Orchestra = usical program from Capitol Theuter 30 Little Symphony Orchestra 770 8 P.M. iness Men™. ““The Analyst's Talk for Rusi Vocal solos: Oriole Onclestra Kudio_Bible cl S Urcliestry Woods, seprano iscopal ‘Cathedra) xervices ew York Philhurmonic Orchestra Itadio chapel serv S T43—Talk by Morris Lichtenstein .. 5:00-Mildred Woods. sopranc ... Vocal and instrumental v Stadio coneert ... = Organ recitul ... 8:30—Loew's Theater broadcust .. ... Memorial Church services Sport news 8. 45—Cvntral Luth Organ recital ran Chirch services 970 10 BN 9:00—Chiristian Chureh sersices - Keligious services: Miwouri Siate Churel services 5 Western and Soat Paul Specht's Post Lodge Orchestrs Cliurch services ... = Art Hickman's Concert Orchestra Crosby Risters and Sigms P'i Vi 9:30 9:45 10:00—0Organ oux A recital recitul cal chupel ervices Hymos sung by Miss Aooa Meyer. soprano . 10:30—Or hestra program 4 10:35— Tempie Presbyterian Orchestra 11 P.M. TO 12 MIDNIGET. 11:00— Musical program Cvncert_Orchestra = 11:30-Kudy Seiger's Orchestra 2:00- Wes Bennett's Orchestra 1:00—Orchestra program 4 TO 5 P.M. 4:00—Address: music from Newman Theater sTosrM Orchestra Trio 1070 u PN, 12 MIDNIGHT TO 1 A.X. 1102 A Bethany Chure Pittsburgh San Franctaco New York New York Philadelphia Boston Zion, 1U. Davenport Chicugo Eigin, I New York New York Kansas Ci Med'd Hill'de New York Philadelphia Louinville Fittaburgn Miuncapolis Pittsburgh Springfield Cliicago Atianta New York New York Oaklavd, Cal New York Chicago Dallax New York New York Detroit Schepectady Pittsburgh New York New York Springfield Montreal New York New York Atlan: Davengort i Minneapolis Springgield Kansas City Jeflernon City Torira Oreg. Cincinoati New York Davenport Los Angeies Los Angeies 469 lot Argeles Dallas v Omaha Towa City Davenport Dalias a 3 EHI LKFI KPO Los Avgeies Los Angeles San Francisco ©...KFI Tos Angeles EP los Angels ————— e ftwcles 40 RADIO’S BEST OFFERINGS TONIGHT. Program from Capitol The- ater by “Roxie” and ‘“his gang” WCAP, Washington, and WEAF, New York, 6:20 to o'clock. Concert by the New York Philharmonic Orchestra, direct from Lewisohn Stadium, W) New York., and WGY, Sche- nectedy, 7:30 o'clock. Organ _ recital _irom the studio of the Skinner Organ Company, WCAP and WEAF, 8:15 to 9:15 o'cloc Recital by Elizabeth Bates, contralto, and Ahrleeg Tait, organist, from the Steinart Slfidiu WB pringfield, 8:30 o'clock. Broadcasting irom the stage of the Loew's Metropolitan Theater in_Brooklyn, WHN, New York, 8:30 to 9 o'clock. song recital _irom Methodist Church, 10 to 10:45 Sacred the First WFAA, Dallas, o'clock. gency traffic when other communica- tion lines are out of commission will probably be discussed, as will the question of advertising through the ether, together with Government reg- ulations relating to such advertising. The exact date of the comference and the number of invitations to be issued awalts the return to Wash- ington of Secretary Hoover, but it is understood that ali organized in- terests will be invited to send offi- cial representatives to act as dele- gates, with voting power, while ir dependent and allied interests will be welcomed at the conference, which will be open to the public. 'Assur- ance is given that no members of the large radio family will be left out, as a general representative confer- ence, such as has already been held twice, is desired. World Fliers Get Radio. When the Army world fiiers reached Hull, England, a complete radio transmitting_and receiving set was installed on Lieut. Smith’s plane, the Chicago. ~This apparatus will aid the aerial voyagers on the final lap of their long trip, crossing the north Atlantic with stops at the Orkneys, Iceland, Greenland, Labrador, New- foundland and Nova Scotia.' They will be able to communicate with shore and ship stations constantly, and be ready to call for aid in the event of an accident By the time the fliers reach the coast of this continent amateurs and fans acquainted with the code may be able to -pick up messages from Smith as to his progress, or even his communications ~ with naval vessels en route. Capt. Harold McClellan, a radio ex- pert of the Air Service, until recently on leave in London, installed the ra- dio equipment at Hull The receiver is one of the new Army super-hete- rodyne sets recently perfected by the Stgnal Corps for the Air Service. It operates on eight tubes, and includes four special intermediate transform. ers invented by Jackson H. Pressley. chief engineer of the Signal Corps radio laboratory at Camp Alfred Vall, N. J. These transformers are very efficient, it is said, and have com- mercial applications. Commercial in- terests have recently purchased the design of the transformers from the inventor, and it is understood that they will be put on the market in e Fall. Mr. Pressley has recently ?: several other revoiution- ary modifications and improvements in .u.- ol super-| rodyne hook-ul ‘The :ln;luo transmitter is a 100- watt set, with a range of about 500 miles, which should carry from the airplanes to shore stations even on -fl' m' the poses. The cruisers Richmond and Raleigh and two destroyers will operate on the route from England via the Orkneys to Iceland, five de- stroyers will function between Green- land and North America, and the cruiser Milwaukee will operate off Halifax, carrying an advance officer of the Army Air Service and co-oper- ating with destroyers through the ice-filled lanes mear Greenland. Radio Mcn Hecome “Middien.™ Among the enlisted men of the Navy to qualify for training as otfi- cers at Annapolis were two radio men. The first was K. H. Weir of East Hampton, Long Island, N. Y. and the second, R. R. Raynolds of Newoan, Ga. Both were third-class radic men. They have not only passed their mental and physical ex- aminations but have been entered at the Academy as midshipmen. Recruits Kmployes by Radio. The Civil Service Commission has discovered that radio broadcasting is an excellent means of spreading its civilian personnel needs throughout the land.” Today 21 broadocasting sta- tions co-operate in making annoutice- ments relating to openings in gov- erament departments,_aiding in the employment of about 70,000 individu- als a year ~ This broadcasting in- ciudes acrial want ads, expositions of the merit system and details of the types of service in the many Government agencies. It is found to be both interesting and instructive 1t is fair to assume that many radio fans have profited by this aerial employment service, but just how many applicants have been at- tracted by the broadcasts the com- mission is not in a position to state, as it has 3,500 local boards operating in practically all large cities, and no report as to the maaner of securing the prospective employe's attention is sent in to Washington. This service was undertaken by the commission about a year ago through NAA, at Arlington, which is still used ‘once a week. The first announce- ment concerned the Government's need for several radio engineers. Many returns came in after the broadcast, but mast of them were from amateurs and radio fans un- qualified for this technical work. Ra- dio has since proved its value, and the service has expanded rapidly, especially during the past three months, include the 21 broad- casters. . Among the cities co-operating with the commission through local broad- casting stations are Springfield, Mass.; Cincinnati, Ohio; Los Angeles, Calif.: Baltimore, Md.; Norfolk, Va.: Atlanta, Ga.; Chicago, 1ll.; New Orleans, La.. Denver, Colo.; Louisville, Ky.; Fort Worth and Houston, Tex. Some of the instructive lectures on Government activities recently broad- cast were on the Bureau of Stand- ards, the Patent Office, income tax returns, illicit drug traffic and mis- leading ads relating to so-called civil service schools, which bave no gov- ernment connection. to Two New Stations. Two additional broadcastiug 'sta- tions were licensed last weck by the Department of Commerce, both in New York _City. They are WEBJ, Third Avenue Railway Company, 273 meters, 500 watts, and WFBH, Con- course Radio Corporation, 273 meters, 500 watts. < = "WCAJ, at Wesleyan University, Ne- WASHINGTONMAN WITH EXPLORERS Leo Bond Roberts, Former Central High Athletic Cham- pion, to Chart Desert. NOTED MAP SPECIALIST Prepares to Join Roy Chapman An- drews Party, Which Will Search for Garden of Eden. A native son of Washington, Bond Roberts, will scientists secking evidence of the Garden of Eden in the Gobi Desert with the Roy Chapman Andrews ex ploring party. H name was dicos in the per-' announced . Andrews a taking the trip. Although listed as a engineer Lee be among the now civil in the roster of scientist« of Kansas Cit Mo., Mr. Robert =till has in his pos sion memento. of the days back in the $0s when as o track star he used to break the tap. in 50 and 100 va lashes. He wa captain of the Central High Schoo® track team in 1596, when Bill Fole coached the team Mr. Roberts is He is preparing sas City for a VISIL To the the party MAJ. ROBERTS. 7 vears of age now at his home in K lonog and siring desert lands of Asia w the g His specialty en ias been map In fact, was | frafted as a speaker for ‘the Wes | Snt Cadet Corps on “Maps and Ma-.+ Making” not so long ago. and it ws he Who returned to this city in 1914 win A Jetachment of men und liter iy ons of maps for the Wa College in this city, 7 1°F e W viable War Record. During the war he ma € war he made a able record. Commissioned as second lieutenant of the ginecer Reserv Corps “on April 1517, being us- sighied to duty with 1t 5th and later the 29th Engineers, he left the OT Overseas in January eny United States o 1915, Before six months had he was a first lieutenant. | On Fabro ary 1919, he was made a eaptain missioned majo Py teturning pleted his w vate life with officy fo this country. he com work and entered pri consulting engineer in Kansas City, Mo Champion Sprinter. After leaving Central High Schoo Mr. Roberts went to Kansas Univer Sity. where he won several champion ship medals as a sprinter. Afte eraduation he entered the service the United States Geological Su. Where he remained for 11 vears. Dur Ing that time he joined the Myron 3 Parker Lodge of this city and member. He was fo IWO years connected with the New York™ Wa Fower Investigatior Company ax a division enginmer So'iUs easily possible that a who starred life us a local bop be the one to stumple acemie dence that Masonic is stll a mar tumbi he evi umble across the v Adam hnd Eve Tived in a luxurious garden where o o sands of the Gobi Desert refiect 1o “corching raye of the son KANSAS CITY PROGRAM. Clubs and Roof Gardens to Furnish Music for Late Listeners. ] S CITY. July (Special w l'.-\l:‘ WHI cut over the roof gr:r;e:\‘ of the Kan € City Club Thursday and Saturday nights to provide new entor U ment for i nighthawk listeners For the remainder of the summer WDAF will broadcast every other Week several numbers by (he Kepn “Chaguette Orchestra playing there lo:’x T.hu:;ln-ll.:\ E .d)‘ Saturday nights. n_alternate weeks music by o .\nrdh.-rz* Hotel Muehimach Y;‘lx\'edril the Riley-Ehrhart Winnwood Beach ntértainers and Charles Dornberg- - Orchestra will be broad- Sports Talks for Women. A series of for Women.” Albion. will be broadeast from duw]n;.' August Swimming, tennis &olf. bieycling, horseback riding. hik- ing and buse ball will be covercd talks on “Season Sports arranged by B . and WEAU. were transferred A. The att station ferred from ciass ¢ t Sioux City from class © Chicago Tribune's WGN” was trans- to class B Radio Aided Lorain Relief. During the recent tornado in Ohin the Navy answered its first SO from land. While anchored in Pu in-Bay the naval radio operator of the cruiser Wilmington picked up fragments of radio calls indicatme that the citics of Sandusky and Loruin were practically destroyed. in re- sponse 1o SOS calls, the cruiser Dubugue was ordered to Sandusky and the Wilmington to Lorain. Both these vessels aided materially in guarding the cities, furnishing med cal assistance and supplies to 1k injured and homeless. In a letter of thanks the Governor of Ohio ex pressed his appreciation (o Secretary of the Navy Wilbur. Poland Forbids Radio. The Polish post office department has announced that, pending le gisla tion, private radio sending or re ceiving installations in Poland are still forbidden, advices to the De partment of Commerce state. Antici- pated legislation, while expected o permit private 'receiving = stations will eontrol their installation strictly by license. Unauthorized private ra dio telephone receiving stations will be sealed up on discovery by thee postal authorities and the case prose- cuted. Considerable criticism of this re strictive radio policy is expressed in Poland, but the government is urged not to abandon control of communi- cations, - especially with Soviet Rus sia, due fo the presence of numerous communist agents within the country Efforts of Dbritish, French, German and Polish concerns to obtain a mo- nopoly over eventuai sales of radio equipment have further delayed re- laxation of government control RE-CHARGE YOUR BATTERY BY TELEPHONE Phone us before 10 am. and we will call for and deliver your battery, fully charged, the same evening for $1.50. SMITH’S Battery and Electrical Service North 9928 2119 Eighteenth St. N.W. In addition to being able to supply any type of astomobile or radio battery we can remedy any automobile or radie trowble. Distributers of Nilde Automablle and Nadia Haltertes Open Wesk Days 8 to 9 pam., Holidays 10 to 2 pm.