Evening Star Newspaper, December 21, 1924, Page 42

‘SCREENING' TESTS AID RADIO SCIENCE First Investigations of Ef- fects of Steel Structures on Receiving Given. We are likely to talk rather loosely about the “screening” effects of steel structures, about the impossibility of recelving radio signals inside metal bufldings and the like. No doubt such screening effects do occur, but their exact nature seems never to ¢ been investigated with any ac- aracy and completeness. Or, rather, the first investigations of this char- | acter have recently been reported to the Institution of Electrical Engineers (London) by R. H. Barfleld Loop antennas attached to receiving sets of great sensitiveness were placed inside continuous metal tanks, inside open-ended cylinders of wire or metal, inside cages of wire screen and In various other situations where screening was to be expected. Results of Experiment. The results indicate that the most fmportant feature of an effectual screen s the existence of metallic clrcuits In {t. For example, a rage of wire netting is an effectual screen f the wire is electrically connected t all jolnts. A mere series of wires rranged in closed loops is effectu But wires that do not make closed circuits or wire netting that is not lectrical connected to form a milar closure are not effective. Perhaps the most striking instance reported by Mr. Rarfleld is that of a recelving loop that was entlrely in- closed In a soldered envelope of tinned iron, as though it were inside the inner tube of an automobile tire. The two terminals of the coil came out through very small insulated holes in the iron. This cover pro- cuced a practically perfect shield so long as the metal of it was continu- ows. Problem for Amateurs. But when a transverse slit was cut in the metal of this envelope around the recelving coil enough of the radio waves to produce a fairly strong signal Immediately penetrated the slit. Even when the slit was as narrow as it was possible to make it without. producing actual metallic contact a substantial amount of radlo v continued to penetrate ft. hard to reconclle these re- with the supposedly great screening ascribed to the stee! frames 'of American skyscrapers. It Beems evident that the exact effects of such metal structures on the radio waves deserve moré careful and ac- curate study than they have yet re- celved. Here is an excellent prob- lem for amateurs who are experi- mentally inclined. A model of a typical skyscraper, showing the exact strength of signals obtainable on each floor and on each part of the floor, might be of the greatest value to radio. Local Radio Entertainment Sunday, December 21, 1924. NAA—Naval Radio Station, Radlo, Va, (435 Meters). 10:15 am. and 10:05 p.m.—Weather reports. WDM—Church of the Covenant (ZT5_Metern). > 10 am—Every Girl's Bible Class, Miss Mabel N. Thursto teach 11 a.m.—Morning service: Sermon by Rev. Charles Wood, on “Gold, Frank- incense and Myrrh.” 7:15 p.m.—Christmas car evening choir. 3 p.m.—Evening service: Sermon by Dr. Wood, on “The Child Called Jesus.” , by the WRC—Radlo Corporation of America (469" Meters). i Bilent. WCAP—Chesapeake and Potomac ‘Telephone Company (469 Meterm). 11 a.m.—Service at the First Con- gregational Church: Rev. Jason Noble Plerce, pastor, will deliver the ser- mon. 4 pm—Speclal Christmas carol program, from Bethlehem Chapel of the National Episcopal Cathedral at Mount St. Alban. | 7:10 to 9:15 p.m.—Musteal program | by “Roxie” and “His Ga direct | from the Capltol Theater, New York Clty, by courtesy of the Capitol The ter management and S. L. Rothafel 9:15 to 10:15 p.m.—Organ recital di- | ct from the studio of the Skinner Organ Company, New York City. RADIO QUERIES Radio Editor Please help me locate the station signing off Thursday night at 9:45 THE SUNDAY STAR, WASHINGTON, Long Range Radio Entertainment SUNDAY, DECEMBER 21, 1924. The Programs of the Following Distant Stations Are Scheduled for Eastern Standard Time ©:00—Children‘s hour; stories; musiesl program . 10:00—Omaha Gospel Taberntele of Christian and Mis- pel services . Al Sacres lance Cha, First Lutheran Chnreh o The Cathedral Church of St. Church services ......... Bethany Presbyterisn Chu quartet 10:57—0rgan muslc . 11:00—TNroadway Christian Church St. Thomas' Episcopal (. United Preabyteriun Chure Church of the Covenant serv 4 Uncle Walt reads the funnie 12:45—Coucert trom Balsban & Kat; 1:00—Los Angeles Church Federati Sermon_from KHJ studio : male quartet: dore’ Trwin 2:30—Concert progrum Fedération selections b Musieal * program from P 2:45—Interdenominational New York Quartet; of Churches Queens 8:15—Swedish Evangelical Mission 0ld South Forum m 3:30—Master a. A, Brookiyn; chimes; Solos addres The Salen Sermonette; sacred chimes Servic 4:30Addreas Studlo concert p 4:45—Vewper sers| from Germantown Y. ram Roselan copal Church 5:10—Houwe of Hope Presbyte 80— Musical program by 5:45—""The Fairyland of Hon ilight musical program Sacred co vention 7:00—Radio Rible o songs Rivle atudy D exper services athan Abas Program’ from United Musical program ... 15%—Holy Trinity Church 5 from First Mrs. Lo Hotel P byterian Church Musical program_from Ford Pipe organ recita Musical program Toxie 8:00—Max Kalfus, tenor; Keith M pec.al artists’ program . ~Second Church of Christ, Sc 8:80—Max Kalfus, tenor; Kelth Mc First Presbyterian’ Church se Slat Eirst Chri fan’ Church of Je: 8:45—Joseyh Boec Mized quartet; Portland Coun: H. 8. A. Choral Singer 9:30—Ben Frad xad bis WIP Symph recita Bpecial concert Concert by Western A munical Chri 4 Sout 10:00—Metropolitan Theater progra Organ recital from First “oncert by Colburn's Orchy “hristmas program'” Reminiscenc ford .. SRR Musical chapel services from cholr ... Concert by W ae 10:15—Twin 10:30—Juck Musicul program by Palmer 11:00—Christmas concert by One-nct plavers ... Vanity Club revue All Cadman program 12 2.00—Tlarry Richman ai 3 “"Tnd his orchestra - .. Program from Examiner wi Midight program from listen trio 5 Midnight 12:30—Musical program oclock on a wave length of about 285 meters. The announcer spoke in | broken English and said: “Elia,| Cuba, the land of sunshine, sugar and | tobacco.” The call lotters were efther | 7SR or WSR. and This came in very loud | clear over the ioud speaker.— | SE HYER HARTUNG. i trausmits on a 309-meter wave band. | Its slogan is: “Cuba, the land of sun. | shine, sugar and tobacco.” It is & 250- watt station and broadcasts on Mon- day, Tuesday and Thursday nights. Radfo Editor: Please give me the exact location ef station KFGZ, Berrien Springs, Mich—MARVIN BASCOM. The location given in your query is correct. TR® call letters of the sta- tion, however, have been changed to WEMC, Radio Editor: Wednesday evening at 6:30 o'clock I heard a station whose call letters begin with a K. It sounded to me as though the call letters were KGI. A talk on automobiles was being broad- gast at the time. The announcer said *he station gave a 24-hour service. Kindly tell me what station I heard.— ILLIAM GOTTHARDT. ¥ KYW, Chicago, Is the only station, which broadcasts 24 hours out of 24. Radio Editor: What I am writing to you ought to be of some interest to radio fans. I ve two aerials which I use. One is feet high on one end, 40 feet high #n the other and Is 75 feet long. 1 osed this antenna on clear, cold gights and get fine results. On damp, heavy nights I use the other antenna, which is 26 feet high on one end, 20 ot on the other and 100 feet long. have both aerials attached to a Switch and use either one, according the weather. By doing so I always et good results. On the high an- fenna I bring in 6KW, Tunicucu, Cuba, by setting the dials on 36-28-24 and for the same stations on the lo er aerlal, the dlal setting is 32%4-243%- 203%4. The station comes in on the ARGENTINA’S BEST D Broadcasting Between April and May Most Satisfactory. the Station 7SR is in Elia, Cuba, and|radio months in Argentina are be- and September, static is at its worst in the United States, due, of course, to the reversed continent. Strange as it may seem, tween April seasons in the Southern 10:45—Linwood Chratian Church services Church of the Unity Services, urch services St. Paul's Episcopal Cathedral services . 12:00—Trinity Baptist Church services, Minnespolls EFirst Methodist Chureh services: organ musie First Presbyterian Church services ..... Firat Presbyterian Church services .. recital and services from First M 1 concert by Arcadia Orchestra Convert by Palmer Seliool Radlo Orchestra usical exercives from Hethany Sunday xchool ible Claxs under auspices of (Greater New York “Practical Religion,” by Rev. Harry 8:45—Men's conference in the Bedford Branch Y. M. C. 4:00—Yenper gervices from St. George's ience half hour . Otgan recital by Dr. Charles Heinroth .. trom Central Brauch of Y. M. Shadyside Presbyterian 5:00—Yeaper song service from First Unitarian Church y Star's Radio O ecital by Frunk K. Roj Val and’ his by De Kalb Count 6:30—Concert by KGO Littls Symphony Orehe Dinner concert by Scalzo's Orche 7:80—Organ recital and services from Arch First Lutheran Churh sersices 7:45—Calvary Eplscopal Church services . Lo, Christian Church servi 8:15—Rernhard Levitow's Hotel Commodo Fliwt Presbyterian Church service: “Who Does Your Thinking for Yox Werley Memorial Chufch xervices: organ oria Hotel Or! instrument; ;B n_recital from Skinver org: Art Hickman's Concert Orchestra ... New Ariington T Familiar hymas by Mildred Paddo 11 P.M. TO 12 MIDNIGET. Mary's Cathedral Choir ilie Keilar. < 11:30—Concest by Rudy Seiger's Fairmont Hotel Orchestra. KPU s entertainers; Eddie Elxins Automobile supper from Alamac Hotel . % TO 10 A.X. «.WIZ New York 455 10 TO 11 AM. 5268 Omane - " 383' Davenport 423 580 278 508 Cincinnaty Schenectady #hiladelphis Kansas City o 837 et %o vocal ‘solos; male 11 AM. TO 12 NOON. Lonisville New York Pittshurgh Detroit organ; eholr. WHAS Wiz sersices 12 NOON TO 1 P.M. » WCCO Mionespolls Fort Worth Atlanta Hot Sps., Ark Cincinpati Chicago Chicsgo ices . n to the z Chicago Thenter . on services . LKFT CUKHT Church’ KLIJ 2 TO 3 P.M -...... WDAR ews Symphony Or. WWI 0 of Churehes WLAL Tow Angeles Los Angeles Philadelphis Sun Francisco Davenport Ptisburgh Philadel chorus: Christmas i New York New York New York of Katrino Trask's Christmas play, tle Town of Bethlehem," i WGY Orchestra County Christian Ends by Albany vor ‘program Church services Seheneetady New York Omahe Boston Chicay New musical “con Fosdick ork loria Trompeters New York New York New York C nelopati Pittaburgh Philadel Ph ladelphla Montreal Pittsburgh concert . 3. C. 5 TO 8 P.M. .. WHAS wi WDAF Louleville ew York Kausas City d Orch WGY weco WHN Wiz Schenectady i Minnespolis . W00 CKGW Portl'd, Oreg. . WEBH Chicago Atlanta On S - Pittsburgh 7 TO 8 P.M. Presbyterinn Church; an R, dray’ on of Annie Craig eatra " Hospital New York Roston Lansing Philadelphia Philadelphia Bpringfield Fiall ¥ ‘ Schenéctady nusical program . Chica, and his gang - s Pittsburgh 8 T0 9 P pianist ... WIZ New York WMH Cincinoati :BI Chicago 4 e York inneapolls New York Cinclanaty Dullas ntist . cLeod, pian Margaret Springfield _Jefferson City At erson City sery 9 TO 10 P.M. Christian Chured . from WiZ. 0 Chuich services solox: bells chenectady Kamnas City Wil WCRD IKGW WRER I WEAF LW Ky studio ony Orchestra: orgl hera O mas program ... 9:45—Musical appreciation talks .... ST SR los Angeles 10 TO 11 P.M. m Ho Los Angeles New York Sip New York Park M. ity New York glhllrllfl " : nnes music recital.... Dallas Lyl a) School Orchestra Davenport Portl', Orer. Los Angeles New York Los Angeles San Franeisco harpist LKRT MIDNIGHT TO 1 A.M. -WHN New York Los. Angeles Kaneas City Fort Worth Los Angele New York ers in’extr Cai d WBAP KHJ LWHN 1 TO 2 AN 1:00—Hurley's Take Arrowhead Orchestra . ATES. best when With the opening of the radio sear son a large demand for receiving sets {e anticipated at Buenos Aires. Reocently an American company or- ganized the Associacion Argentina de Broadcasting, with 350 members, mosatly dealers in radlo apparatus. This company pays a fee broadcast- ing and also publishes a monthly magazine. It is estimated that 90 per cent of the radio imports come from Me It a Radio Christmas Complete Set, $5 Up WM. P. BOYER loud speaker and can be heard in the room clear and plain. % I recelved. a station in Montreal, Cansda, the other night about 11 o'clock, but did not get the call le vs. Could you tell me what s tion 1 heard?—WALTER FLYNN. CHYC probably {s the station you, Reard. the United States. in Argentina. Approximately 190,000 recelving sets are now used 812 13th St. Meters. iles 204 1,012 81 Suz BEEZE¥E ¥ ¥s% £33 “ 55 §5n BUE » ror “SIGNOLA?” Portable Loop. Aerial When not in use folds up like an um- $8:59 SIGNAL ELEC brella. The loop is attractive in appearance. The wood parts are hand-rubbed, dark mahogany finish; metal parts are polished nickel plated. Iosulation is Formica. The thirdtapis for use with Super—and other circuits. ' To see this loop is to a te the high quality of Signal worl ip. y this loop has proved in test the most efficient yet devised. Ask your dealer. Write us for folder on this and other Signal Radio products. Will Radio Highest Note Ever Sounded By Human Voice CHICAGO, December 20.—Radio fans and music lovers will have an oppor- tunity Friday night over WLS, Chi- cago, of hearing the highest note ever recorded by the human voice, when Edna La Verne Friebe, lyric soprano, who holds this remarkable record for altissimo, will give a musfcal program. This will not, only be of Interest to the musical world, but will be an achievement for radio, ‘according to Edgar L. Bill, director of the station. The broadcasting of high notes in singing has been found dificult, but WLS has made successful tests with Miss Friebo's voice for her inaugural radio program. Mixs Friebe is able without any effort to record and sustain B flat above high C-the world's record n altissimo for the matural tone of the voice. The record high' singing was previously held by Ellén' Beach Yaw, & noted concert singer, who reached A above high C.. Miss Friebe established her record at the con- clusion’ of -Bishop's "Lo, Hear the Gentle Lark. j Cou R VAT NEW YEAR ECHO BY RADIO Canadian Railway President’s Mes- sage to Be Record for “Tie-In.” MONTREAL, December 20. — Sir Henry Thornton, chairman and presi- dent of the C dian National Rail- ways, will address vast audlence on Sunday evening, December 2 when he will broad t a New Year mes- #age through t medium of three radio stations of the system in what will be the record for u tie-in effected in Canada. On that occasion Sir Henry will speak in the studio of CNRM, the Canadian National Rail- ways radio station at Montreal. CNRM will be connected to CNRO, the Ottawa station, and through Ot- tawa to CNRT, the Toronto station, and the amplifying equipment at the Ottawa and Toronto stations will complete the broadcast, as though the president were speaking in person from either of these stations. The special broadcast ls to mark the first anniversary of the radio department of the Canadian National Rallways. e Heavy Wire Works Best. The distance range depends upon the resistance in the antenna system of the receiver as well as the power rediated by the transmitter. This means that the an- tenna should be made of heavy wire, well soldered, as high as possible, with a direct lead-in and as short a ground connection as possible. ™ of a recelver Get Distant Stations With Roll-O Crystals 1.000-mile loud and clear reception GUAR ANTEED with the famous Roll-0 Long Dis tance Crystals, made by our secret o You can improve Yi sending Ope Doilar 7 for TWO Roll-0 together with FREE special cat ers and FREE set of special instructions. sfaction or your money Lack without ques- The Roll-O Radio Corporation 2. innati. Oblo. Phone us before a.m. and we will call for, fully charge and return vour Radio Battery the same evening for $1.50. 77777, 77 7 North 4896 Battery and Radio Service - 2119 18th St. N.W. Dixtributors of Exide Au. tomobile and Radio Bat- teriex. Experienced nutomo- tive electricians and radio engineers. % TOON (mASY TUNE) Dials will make them Happy This Christmas Solve the tuning troubles for Father, Son, Husband or hmhfivin&: aset of EZTOON Dials this Chrie mae. This is a gift that will please any radio fan and improve any radio set. Aneistic desig They give that fine adjustment so essen- dal to close tuning. Two dials in one TRIC MFG. CO, IFRas | UR reception 100 by | D. C, RADIO’S BEST OFFERINGS TONIGHT. Musical program by “Roxie’ and His Gang,” direct from the . Capitol Theater, New York City, WCAP, Washington; WEAF, New York; WEEL " Boston; WJAR, Providence, R..I, and WDBH, Worcester, Mass, 7:10 to 9:15 d'clock. Joseph Knechit's Waldorf- Astoria Hotel Concert Orches- tra, WJZ, New. York, and WGY, Schenectady, 8:45 to 10 o'clock. Organ recital from studip of the Skinner Organ Co, New York City, WCAP, ton, and WEAF, 9:18-to 10:15 o'clock Ben Stad and his WIP phony Orchestra, WIP, Phila~ delphia, 9:30 o'clock. i Special concert Arlington Hotel, ~Springs, Ark., o'clock. from New KTHS,- Hot! 9:30 o 11 Jack Gardner and his or- chestra, WFAA, Dallas, 10:30 to 12 o'clock. Brass Brackets Bes When mounting inductanc sort avold the use of steel brackets. These metals effciency of the induct troduction of magnetic the field of the coil. cts. or iron impair the e by the in- metals into Use brass brack- DECEMBER 21, of any | 1924—PART 1. COMEDIAN OF SCREEN AS RADIO ANNOUNCER Johnny Hines to Ofidn_te' for Sta- tion WIP in Program Saturday Night, December 27. PHILADELPHIA, December 20,—As a diversion from the more or.less try- ing film stunts that cause our hair to stand on end as we watch his movics, and so millions of people who have laughed at his pranks on the silver shoet can laugh at his humorous re- marks, Johnny Hines, inimitable comedian of the screen, will announce the entire program from station WIP Saturday night, December 27. He is not listed as a “speaker,” that would be dangerous—radio fans would laugh entirely too much for health. He will announce the num- bers that compese the program, in- jecting, as he goes, remarks -and catchy phrases, for which he Is known all over the country. Johnny Hines Is the fortunate pos- sessor of an and a great treat s in store for fans Who tune their sets to WIFP's 509 me- iers. The usually droll and solely in- formative announcement will be changed to remarks suiting the num- ber that is to be played, much to the fans’ delight. Such catchy phrases as “Bananag never brought any real money till they set ‘em to music,” .and “An apri- cot is mothing more than a sport- model prune”” have earned for Johnny Hines the title of Champion Wise-Cracker of America. e Voltmeter Aids in Testing. | A voltmeter is especially useful to check up-on the strength of the B and C batteries, where several tubes are used and the drain on plate voltage is high. The storage battery is tests d by a hydrometer. ERL As good inside as the one-piece, perfect shield- ing, outer shell of steel. Costliest audios built- 61 rario¥4%9 3id ratiot4ee Push-Pull-$loP: volume sales lower the prices TRANSFORMERSE LASTERPIEE A Five Tube Set This remarkable set will perform to your entire satisfaction. We do_not nced to say much about it. Every ] Some of the features are: Simplicity of operation, reputation. Ivery one knows it by great selectivity, ability to bring in distant stations, good volume and high-class workmanship with good appearance, We offer this set complete as follows: Freshman Masterpiece Set, ve R. C. A. Tubes, 100-ampere Hour Gibson Storage Battery, Two 45-volt Eveready B Batteries, pair Brandes Phones, Loud equipment. Our Remarkably low on complete set as above, Speaker and complete Antenna $95.50 price Terms May Be Arranged BRANDES SUPERIOR $6.00 PHONES $3.25 TUBES - $2.89 ‘WD-12, WD-11, UV:201A, UV-199 Genuine Radio. Corp'n Tubes: Gibson Stor 6+volt 60-amp. hour. .. s G=volt 100-amp. hour. 4 These Batterfes Are Unconditionally Our Name Is Your Our Wonder Crystal Se only $3.98 Crosley Two-Tube Set Complete with R. C. A. Tubes, Brandes Superior Phones, all Batterles and An- $31.50 tenha Equipment. Our special price. ... Dry Cells, 29c Brandes $10.00 : $6. 89 Table Talkers... age Batteries Eveready B Batteries Large 22V volt Burgess B Batteries S teaely | $2.35 Large 45- -volt .$10.98 ..$13.98 uaranteed uarantee Columb‘a Eveready Dry" Cells, 3 for $1.00 RADIOLA III The Wonderful Radlo Corpo- ration Two-Tube Set, complete with Tubes, Brandes Phones, all Batteries and full Antenna Equipment. Our s, e- $35'00 cial Price Western Electric v $8.08 i unie 97.89 Western Phonograph Unit Ramst oS“etc, Three-tube complete .. . $54.50 Loud Speaker Included Buy Your Radio Sets and partg Where the Prices Are Right on the Whole Line and’ Not only on a Few Items. That Place Is Get It At Gibson's : Where Your Dollars Have More Cents 917-919 G their |1 unusually active mind, | i St. N.W. | | IH Use the Keene line of high-grade Radio Sets, Loud Speakers and parts. We feature: SETS Murdock Neutrodyne Garod LOUD SPEAKERS Music Master Frost Atlas Davis Pathe Console Reflectone Crosley Pathe Eveready Batteries—W estinghouse Rectigons and Westinghouse “A and B” storage batteries. E. R. KEENE, Inc. 3 Wholesale Distributor 10195 17th St. N.W. Main 97 ie———la|lc— | ———ja|—xs| I=n—n—n==01 ¢LorChristmas For Christmas give the radio fan a Balkite noiseless Battery Charger. It ends the nui- sance of weak batteries. It can be used while the set is in operation. For sale by leading radio dealers everywhere. Manufactured by FANSTEEL PRODUCTS CO., Inc. North Chicago, IIL FANSTEEL E NOISELESS Bal T:{te%aflevf Pieg] Q)50 CharEer Eastern Representative J. P. Rainbault 30 Church Street, New York . Y. Cortland at is your place at the Radio Feast? THE infinite banquet table of the heavens is radio-laden with delightful programs, amusing, inter- esting, instructive, soul-gripping. While you, perhaps are satisfied like a supplicant at a Roman feast, grasping at whatever scraps may be tossed to you from the ether. Why not occupy the place of honor, a com- manding figure, able to choose what you prefer from hundreds of delightful offerings of radio stations both near and far? All America is demanding more and better radio at economy in cost of receiving set and upkeep, and “Coto Symphonic,” from the old reliable, pioneer house of “Coto” answers the call. Here is a radio receiving set with the very soul of a master of mel- ody, made of world famed Coto radio apparatus and for that reason GUARA! TEED for a LIFETIME OF SERVICE. Below you see the simple, solid assembly of this great coast to coast receiver, which has repeatedly shown its ability to to_surpass with its four tubes the reception of sets of five, six and even ten tubes. And by “sur- pass” we mean for volume, selectivity and especially for Symphonic Tone purity. Fortunate indeed is he who, by a single decision, moves up to the head of the table and makes himself a master at the feast of the infinite with a (oto Symphonic BROADCAST RECEIVER Our production is limited. Write us for immediate reser- wvation, or for name of nearest Coto dealer. COTO-COIL CO. 87 Willard Avenue, Providence, R. 1. THE ORIGINAL SILVER PLATED AIR CONDENSER. 44.50 $500 $600 SPECIAL AUDIO TRANSFORMER VALUE EXTRAORDINARY $2.50 CCOMPACT VARIOMETER 'WITH HONEYCOMB STATOR COILS $5.00 SYMPHONIC AUDIO TRANS- FORMER FOR VOLUME & TONE PURITY 4500