Evening Star Newspaper, March 29, 1925, Page 32

327 v NOW RANK CLASS B Seattle and Los Angeles Take Piace With Voliva’s Zion, lll., Mouthpiece. Station WCRD, the mouthpiece of Wilbur Glenn Vollva at Zion, 1il, can no longer claim to be the only church- owned Class B broadcasting plant. Of the three Class B licenses, all transfers from Class A and the now defunct Class C, distributed by the Department of Commerce last week, e for 750-watt church-owned These are KTW, the First erian Church, Seattle, Wash,, 454.3-meter wave length and the Bible Institute of Los , on 2939 meters. i$ a_transfer from Class C and rom Class A The third B station licensed last week is a thousand-watt plant, KSL, formerly CI A, owned by the Radlo Corporation of Utah and located at Salt Lake City. Several other plants are understood to have filed requests for reallocation &0 more favorable wave lengths and increased power One of the first of the church broadcasters in the field, WCBD has for some time held a prominent posi- tion among radlo stations. Ideal situated in Zion it has been heard regularly in all parts of the United States and occasio 1y abroad. Besides the three C) B licenses, the department this week has granted new licenses for Class A sta- They are o the Flint Senior Flint, Mi 250 watts, WIAB. tha Madisc Wis D. 0 watis, 215.7 Allen Theater, plants Preshy on the Servi seven tions, High 218.8 Times , 206 meters? Akron, { WHBU. n, Ind.. 10 ers; WHBT, Downer's Grove, 111, eters; and KFVH, Shop. Manhattan, STATION WMH IS SOLD. Will Be Rebuilt to Operate With Largely Increased Power. been, pur- dlo Corpora- The the cinnati, ha Kodel R WMH., i chased by th tlon, it was announced today sta’ n was former owned by Alnsworth Gates Radio (o call rs fo tation will be change n. The station so will be nd its power increased from 500 to 1,000 watts Congress and Radio. Congress read House of Con onsidering * ing the a alled a resolution suggest- ing that t matter of broadcasting Congress looked into, which was Introduced sever, months ago, shunted tc committee and event- vally los m sight Members of mons is the Winner in Radio Shorthand Test. J. Paul Garber. rth street southeast, student Ridge Col- lege. New Windsor, Md, won recent radio shorthand contest broad- gast by station WNYC, New York Garber took dictation at the 120 words a minute and h was adjudged the best from greatest distance. He was awarded a gold medal. paper Local Radio Entertainment Sunday, March 29, 1925. NAA—Naval Radlo Station, Radio, (434.5 Meters). 10:05 am. and 10:05 p.m.—Weather report WDM—Chnrch of the Covenant (234 Meters). Every girl's Mrs. Irvin Bible class, Ketchum sermon The Con- Other Con- 10 am- conducted by 11 am.-—Morning se by Rev. Charles Wood, on version of Zaccheus and versions. 8 p.m.—Evening Dr. Wood. “The Moral Convictions of a Criminal” by evening choir of 100 voices. service; sermon by and Religious Music WRC—Radio C (46 rporation of America Meters). rly Program Monday. 30 p.m--Midday Lenten service under the auspices of the Laymen's Service Association. with the co-oper- ation of the Washington Federation of Churches eake & Potomne Tele- (468.5 Meters). —Service at United Presby- terian Church of Washington. Rev. a Hawthorn, rastor, will deliver the sermon. 4 pm—Cantata. “Olivet to Cal- vary,” by J. M. Mounder, at Bothle- hem Chapel of the National Episcopal Cathedral, Mount St. Alban, 2 9:15 p.m.—Musical program and His Gang,” direct from Th New York City. to 10:15 p.m.—Organ recital di- rect from the chapel at Columbia Uni- v York City. WCAP—Ches: RADIO’S BEST OFFERINGS TONIGHT. Musical program by “Roxie and his Gang.” WCAP, Wash- ington: WEAF, New York WEEI Boston; WJAR, Provi- dence; WCTS, Worcester; WW], Detroit, and WCAE, Pittshurgh, 7:30 to :15 o'clock. Boston Federation of post office clerks reception and hanquet to Senator George H. Moses of New Hampshire and Representative M. Clyde Kelly of Pennsylvania, WNAC, Bos- ton, 8:30° o'clock. Concert by Joseph Knecht and his Waldori-Astoria Sym- phony Orchestra, WGY, Sche- nectady, and WJZ, New York, 8:45 to 10 o'clock. Program from the Brook- lvn _Mark Strand Theater, WNYC, New York, 9 to 11 o’clock. Organ recital direct from the chapel at Columbia Uni- versity, New York City, WCAP, WEE]L WIJAR, WCTS, WW]J, and WCAE, 9:15 to 10:15 o'clock. Studio concert by the Galen Hall Trio, WPG, Atlantic City, 10 o'clock. Thomas | the | rate of | the | ' 9 TO 10 AM. 9:00—Children’s program; comic stories; music. 10 TO 11 AM. 10:00—Liinwood Boulevard Christian Church services.... WHB Chimes concert.. . = LI WDW Watchtower String Quartet: " ehoral “Watchtower Orchestra; Bidle Jecture....... Omaha Gospel Taber. Bapt: WGY Bethany Presbyterian Church services: organ. woo Suaday school, conducted by the editorial st of Sunday school publication of the Meth- " odist Tiook Concern.. 2 RBRS 10:45—Services of the Calvary Episcopal Church 11 AM. TO 12 NOON. 11:00—Grace Methodist Episcopal Church services. . South Qungregutional Church servie choir of 24 volces: quartet: solos... wBZ Morning services from Temple Isael. . 000 Kiddiew boar; Uscle Billy reads the ‘funnies & Organ m Temple Adath Tarael wervices Radlo Lighthiouse Choir; sios; sermon by W. K. WM. oo 3 St. Paul's Episcopal 11:30—Servicen from Liberal S0t Sermon from People's Church, from T Theater; choir of 100 voices; organ...... 12 NOON TO 1 B.M. 12:00—Sersices from St. Paul's M. E. Church; organ. Servicex of the Church of fhe Covenant. Central Church services from Orchestra sbecial musical program X First Prexbyterian Church seryice Trinity Baptist Church services First Presbyterian Chureh services. ... Uncle Walt Reading the funnies to children. LW 0—Symphonic concert frum Criterian Theater; solos. . W 45—Concert from Balabua & Katz Chicago Theater....WGN 1 TO 2 BM :00—Organ recital from Loew's Lexington Thea! Scrmon from studio; vocal solow. o ... Concert by the Allen Theater Orchestra First Haptist Church services; organ; solos: male quartet i 5 4 Los ‘Angeies Federation of Churches: First’ Presbyterian Church of Hollywo KNX 30— What I Playing at the Local Theaters KPO First Presbyterian Church services KGW Orgun recital and services from First Methodist Eniscopal Church i KRy Concert = e e . % TO 3 PM 00—Church services: vocal solos: mixed quartet; organ.KPO. Musclal program by the Deiroit News Orchestra... WWJ “Sunday Hymn Sibg." Federation of Churches... W Speeial concert by fhe Arcadia Orchestra 20—Concert by Westinghouse Symphony Orchestra . 50—Musical exercises from Bethany Sunday school.. Tribune master_artists’ concert. .. - aside Hotel Trio, sermon : < 15—luterdenominational services under the muspices of the Greater New York Federation of Churches; address; Alda Brass Quartet 3 TO 4 PN 3:00—Queens County Christian Endeavor program Orgea recital by Edwin Seder. . Boys' Orchestra..... .. . jor Symphony Orchoatr Organ recital from the auditorium of the A i s High School, by Arthur 8. Brwk.. W uwphony Orchesira from St. Jumes LWz WLW Wiz thedrai wert h -WQI WLW SKYW IwsB Hall LWHN KHJ a0 KOA : ‘solos. - KF1 Wou WGN Wiy IWGN Lliwnn wip Theater Samai 30—Musiral program’ from Piccadilly Theater. wilight concert by Ivan Franciscl's Orchesira by the W rehestra; Ide M. Paul prano . S nference in the Bedford M C A. address; special music Gloria Trompeters; songs; George chime o loist 2 e <. WEAF WGY Betts, 4 TO 5 PM 4:00—Organ _recital from Shadyside Presbyterian Church 5 it Concert from the Boston Square and Compass Club; vocal and instrumental program; read vesper services WAL Wl Sermonette sacred chimes concert. ...l .. Spec program B ical program from Carnegie Hall: coarert inder the auspices of Music Lofers’ Arsocis ton, 15—Community LWHN SWEC WFI - WGN from St James’ ChOIF. ... e usplees of the Chure music by choir Chicago Mus: at wrvices Bpiscopal F 30—Recital of Theater : e 5 TO 6 P.M. 00— Roseland Dance Orchestra WHN Organ recltal from St. Peter's Episce by Dr. Frank §. Rogers Program by the children of Emmanans Lutheran School KFUO Classical concert from studio fn Hearst Squere.. KYW Concert_from the Rialto Theater IWBAF Radio recital: -7l recital on the tal by pupl Classical concert, 30—Chora! Evensong ser thedral: organ and choir of sixty voices “The American Indian Idy and_ Mrs. Sflverman 40—Olcott Vaill and his string trio sl Chirch . WGY aders” ‘and philharmon ¢ organ WDW of Anna D vocal sl WDAK vocnl and instri al; organ from Christ Church Ca choir: men and buys pipe by Miss Mosses Wiy S R 6 TO 7 P.M, pel concert. Lesson; hymns by - WSB WLIT cred chimes 5 woo Muniepal e 7 KGW, Mu First Raptist s _Willard B. Wugner. vocal solos Music by the Westminster P'resbyterian Chi hofr 5 i 8:16—Vesper services from ald Av riab Church: talk by Rev. R 8:30—Dinner concert by sburkh cintion Concert by the vocal molos............ - 8:45—Park Street Congregational Church services 77T0 8 BM. 7:00—Bible study period by Mrs. Carl R. Gray. American Prexhsterian Church services. Capley Plaza Hotel Orchestra.. ........... per mervices: concert of seculsr and sacred Harold Tsabell. Orchestra progri KOA @ Presh Athletic Asso- KGO Little’ Symphooy Orchestra: KGO LLCHYC WBZ SKFIL Wiz CWIP, Hotel Pennsyivan Toly Trin'ty Church service 20— Musical _program by “Roxie WEEL, WJAR, WCAP, WCAE from. St 3 T:80—Services from Emmanuel Taptist Church: organ Organ recital and services from the Arch Street Presbyterian Church Organ recital; WIS Little s from’ First Baptist Church , 870 9 P ce McLeod Mills. . Ambassador Hotel . Leonasd Doerwam, zither plaser. and from Hotel Bruns and his Gang WOTS, WWJ and LIWGY Sech WFI Brown Church program. WLS 45— 8:00—Children's Kadin Sun vy Florence Doersam, pian st Svening Olub services from Or- I special - musical program; houe: Trving Shuster and afhl Simon, baritone: Wymen Miler, and Louls Lane. pianis B 8:15—RadioLighthouse Choir; Predcott Fairchild, vio linist; Mrs, Siduey ‘mith, soprano; sermon Hotel Commodore Orchestra. .. ............... 8:30—Boston Federation of < Post Office Clerks' recep tion_and banquet to Senator George H. Moses of New Hampshire and Representative M. Clyde Kelley of Pennsvivanin......... : First Baptist Church services, Minneapolis. .. Services frum First Presbyterian Church of Wal- nat Hills..... 5 Wesley Memorial Mra. Mildred Merrill, jnstrumental . 2 Services from Episcopal Ghur 8:45—Concert by Joseph Knecht's W phony Orchestr from .. WSUL ENX - WBZ KYW s cellist, Wiz wIY WLW SwsB - WRBZ SWos ontralto; Schumann Trio, £ S - Wiz 9 TO 10 P.M. 9:00—Mendelssohn Club of Male Volces; organ. ... WBZ Varied program, vocal and instrumental; Midday Dancing Gardens banjo sextet wolos; winging team...... ST Program 'from Brookiyn Mark Strand Theater. Male Quartet: Celestial Bell Quartet; solos: or- RAD; TRAINES. .. oo eiisaeeet : Watchtower String Quartet; Cloral Singers: Bi- ble lecture Cencert by the Fireside Hour, Church _services. S Ralph Williams and hi strumental OIS 3 Church of Our Father (Unitarian) services...... 0:15—International Bible Students' Association hour Orchestra; Seaside ‘Hotel Trio and woloist. . direct from Stidio. .......... 3 5 WSAL -woy TKGW rom chapel at Gity. broas WIAR, WCAP, YCAE from ... g 9:30—Germantown Theater O ert by Meyer Davis Orchestra. the Local Theaters' from Vanderbilt I Concert by the Western and The Munn Sisters, soloiets.......... R 9:45—KFI Radiotorial period; musical appreciation taik: K¥I 10 TO 11 P.M. orchestra of wathern Orchestra. .. WLW 10:00—Program from Metropolitan Theate: 40 pleces............ iy Organ recital from Forst M. B. Charch. ... Firat Presbyterian Church of Hollywood services. Dinner concert by Colbura's Orchestra; solos. Tlampton Male Quartet 3 Selections by Rose Mount italph Jones, baritone; Stephen Do'sclalr, organist. Familiar hymns, by Miss Esther Dyke. sopra. “Jeemin scences’ of a. Reporter,” by Willism = Crawford ... 3 . WIY Musical cly ¥ B Choir; vocal olos; ' quintet; Razor entertaines Studio_concert by IKET Wiz LWGY CWHN wrG wey WHB 15— Address: musical’ prog s vary ILutheran Church Classieal program by the International Stidents Four: other artists ardxn's Orchestea E Hofbrau Commandery’ Orchestra 11 P.M. TO 12 MIDNIGHT. :00—Ambassador Concert Orchestra............ . 12 MIDNIGHT TO 1 A.X. 2:00—Tos Angeles Examiner program KF1 > Musical progrum by Ice Cres KNX Midnight frollc by the Orw Mineral Wells. Assoclation; " Or- 10:30-—Dick 10:45—Panssen’s o -Midnight program by + 00 AR erk organ, recital. from Dance music by Theron Dennett a lenes’ Orchestra.., oW WBCN JLKDEA C.WHAR WDAF KDKA KTHS WFAL SWSsUIL ..KFUO st THE SUNDAY STAR, WASHINGTON, D. C, MARCH 29, e Q[}HURGH S]'A"[]NS LONG RANGE RADIO ENTERTAINMENT [ |WRC WILL HAVE SERIES SUNDAY, MARCH 29, 1925 Programs of Following Distant Stations Scheduled for Eastern Standard Time New York Kausas City ¥ Providence .WBBR Ross 54 WOAW Omaha Schenectady Philadelphia Oinclanati {KDKA Pittsburgh New York Springfield WNAC Boston .WBAP Fort Worth dlow. | WHAS Loulsville Detroit Chicago Chicago .WBAP Fort Worth Cincinnati Chicago Atlanta WCCO Mpls.St. Paul Chicazo New York Lo Angeles CWEAR Clevelund Denver, Colo. Los Angelos Lo Angeles San Francisco Portl'd, Oreg. Lo®"Angeles O Boston San Francisco Pittsburgh Fhiludelplia Chicazo Atluntic City - WEAF New York New York Chicago Kuusus ( Philadelphia Atlantic City Schenectady " New York ...KDKA Pittsburgh .. WNAO Boston Cincinnati Chicago New York Atiantie City Philadelphis Chlcago New York Sehenectady Louis Chiea P Fort Wo Prov Kans WBCN WHAS Louisville New York New Yurk Atlanta Kansas City Philadelnhia Philadelphia Porti‘d, Oreg Denver. Colo. .- WFAA ‘Dailas hard D. Hughes. WBON Chicago -EDKA Pittsbargh Oakiand, Cal “WNAC Boston ~WOAW Omaba Montreal Epringdeid Lot Angeies New York ladelphia WEAF New York chenectady Philadelphia Chicago Pittsburgh Tows City Tos Angeles Springfield Chicago WHCN Chicago New York - WEMG Ber. §p., Mch, New York > Boston CCO™ Mpls.-St. Paul Cincinnati Atlanta Springfield Jetterson City New York Springficld L WRCN Chi IWNYC New Fo <~ WCBD Zion, 11, ew York -WBBR Rossv'e, N Y. IWHAR Atiantie tine S WALAR Ataniic City veland Cinclunaty Ohicago Portl'd, Oreg. Los Angeles iladeiphia Hot Sps.. Ark, Tos Angelen San Francisco New York incinna i Dalins Los Angeles Lox Angeles Los Angeicy % Augel. Portl'd’ Oreg. New York Schenectad; Towa City New York WOAW Omaha New York Atlantic City i Kangas City Louis -WCCO Mpls.-St. Peur Tos Angeles A Dallax New York Los angetes ot Sps... Ark, Los Angéles ox Angeley San Franciseo Los Ang Los Angeles - WBAP Fort Worth ing OF .UNCHEON CONCERTS Three Programs of Tea Music Also ‘Will Be Added to Schedule This Week. By inaugurating a series of lunch- eon concerts and with the addition of three programs of tea music a week station WRC this week will eliminate a half dozen more of Washington's silent hours. Beginning tomorrow, WRC will present the first of the luncheoen concerts, which will be played by Sidney Seldenman's Shore- ham Hotel Orchestra from 10 o'clock to 2 o'clock. On Wednesday, the Irv- ing Boernstein Hotel Washington Orchestra will provide the luncheon music, and on Friday the Vincent Lopez Hotel Mayflower Orchestra will take the air at the noon hour. Sharing the late afternoon hours with the Meyer Davis New Willard doncerts. this week will be the dance orchestras of Le'Raradis and the May- flower Hotel. Under the new schedule the Willard trio, directed by Augustin Borguno, will play Monday, Wednesday, Thurs- day and Friday afternoon. The Lopez Hotel Mayflower Orchestra will pre sent its concerts Tuesday afternoons and the Meyer Davis Le Paradis Band will take over the Saturday afternoon concerts, 1925—PART 1. John Smith and His Radio BY FREDERICK C. RUSSELL Car owners throughout the world have fullowed John Smith in his daily motoring—and have benefited thereby. Now he has taken up radio, and is willing that his fellow fans should be amused and profit by hs evening experiences. Smith has @ faculty for “finding out things” 80 it will pay radio devotees to follow him in The Suiday Star each week. No. $—The Simplest Recelver. A request from ¥mith to come over to talk radio with him the evening following our lunch-table discussion about the tuner showed that he had gained a little lead on the young son, whose superior radio knowledge had become such a source of annoy- ancesto father. When I reached the Smith household the big machine was set for the strain of an opera, Jput, down on the floor, Smith and Smith junfor were busy with a few wires and knick-knacks which they insisted would soon be a receiving set. “You know,” sald Smith, divulging his discoveries, “I get puzzled when I try to figure out those wiring dia- grams, but when I actually start to make a set and follow the Instruc- tions it's really very simple. I find 1 have an end of a wire here and one there, and very often common sense tells me where to attach them.” “Fine!” I sald. “You've got the right idea. About the best way to dis- RADIO GOSSIP AND NEWS The rellable range attained by high-frequency or short-wave trans- mitters, with relatively low power, at night Is reported great, and the num- ber of such naval and commerclal stations is increasing, according to Capt. Ridley McLean, director of na- val communications. Daylight trans- anic communication by these sta- has also been reported at con- nges, but such operation is not used us frequently as at night, he explained. These facts, together with the proposal to transmit motion pictures by radio in the near future, impresses Capt. McLean with the ra- pidity and possibilities of modern radio development The Navy is working toward ehort wave lengths in order to get its service away from the crowded broad- ng band. Considerable success has attended the efforts of the naval radio engineers to design and operate ow-power short-wave sets, especlal- v at Bellevue, D. C. From the Los Banos radio station at Manila, Chief Radioman Harry Kidder reports that with a high-frequency receiver he built himself he picked up 44| amateur stations in the United States This is believed to be the first report of short-wave reception in the Phil- ippines. His antenna consisted of a single strand of No. 20 DCC - wire 25 feet long and stretched horizontally anly 6 feet high. Radiomen at the San Diego Radio School, in California, have buflt a transmitter of 100-watt power which transmits on 70 and 50 and has been heard in the States and in Australia Radio central at Washington oper- ates a high-frequency set in its rou- tine work every night.” The work of | the airship Shenandoah Is well known on short wave lengths. Not to be out- done by their fellows of the air, the radiomen at Lakchurst, the home port of the Shenandoah, have built a simi- lar transmitter under the direction of Gunner W. Almour. This set operates with three 50-watt tubes and is of the master oscillator type. In transmitting, a duralumin mast 28 | feet high on the roof of the gigantic hangar is used. To date the station has been heard over 700 miles n day- light and 3,100 miles at night. New Zealand, England and France have reported this station. Withsan in- crease of power, a crystal to control the frequency and a new 40-foot mast, wprovement is expected An aeronautical radio but 50 pounds, with a range of | 15,000 miles, is now in use at the| marine flying fleld, Quantico, Va. This set sends on a short wave length, varying from 60 to 80 meters. Mes- sages from this set were recently received on the island of Guam. in the western Pacific, 10,000 miles west of Quantico and 15,000 miles east. The messago was sent at 2 a.m., East- ern standard time, when a greater part of the world Is in darkness to- ward the east than toward the west. Because of the fact that radio waves travel botter in the dark than in sun- light, and as equipment of this nature has never been known to send 10,000 miles in daytime, it is considered cer- tain that the message traveled ecast- erly, by the longer but darker route. The set is operated with two 50-watt acuum tubes, and is of very com- pact design, measuring not over 2 feet square. This long-range, light- weight radio equipment, with a very small power input, has been developed for use on aircraft of the Navy and Marine Corps, a field in which light weight is a prime factor. Several commercial stations are also using short-wave transmission’ suc- cessfully, and three experimental sta- tions are carrying on tests. The com- set welgh- | having mercial stations as WGH, Tuckerton, N. J. operating on 103 meters to Germany; WIZ, New Brunswick, N. J., on 43 meters, transmitting to Buenos Ailres; WQN, Rocky Point, N, Y., op- erating on 60 meters to Europe; WIR, ew Brunswick, J., on meters, and WQO, at Rocky Point, N. Y., ex- neécted to be ready for use about May 1. 6XI, at Bolinas, Calif, sends on 85 meters to Hawail at night; 6XO0, in Hawali, sends on 146 meters to Mar- ali nd a new statio 770 Phone us before 10 a.m. and we will call for, fully charge and return your Radio.Battery the same evening for $1.50. Smith’ North 9928 North 4896 Battery and Radio Service 2119 18th St. N.W. ] Distributors of Exide Au- tomobile and Radio Bat- teries. Experfenced automo- tive eclectriclans an 7 22 at Belfast, Me will shift to now using 114 meters, meters on May 1. Working Against Frauds. The radio-buying public of the fu- ture will be afforded more protection than has been possible in the past according to Alfred M. Caddell, secre tary of the American Radio Associa- | tion, who annolinced yesterday that | the association had taken steps to co- operate with the Better Business Bu- au in an effort to eliminate fraudu- lent advertising and merchandising from the radio market. This has ad- mittedly been a handicap from which the more honorable manufacturers, dealers and the public alike have suf- fered, many unscrupulous adventurers taken advantage of the new- | ness of radio to exploit purchasers of radio devices. Studying X-Ray Interference. Members of ‘the medical profession, belonging to the American Medlcal Association are hoping to prevent their X-ray machines from interfer- ing with radio broadcast reception To this end the executive secretary of the association applied to the Depart- ment of Commerce for information on methods of shielding electrical medi- cal apparatus. sviewing the situation, Burgess of the Bureau of Standards states in part as follows: “Inter- ference to radio reception caused by electrical apparatus is nearl due to spark discharges which | up oscillatory currents. The effects of these currents can cause troubl in two s—they may be radiated inte: space, or may be carricl by merns of the electric. power wire and In elther case may be picked up by radio receiving sets. . Many types of diagnostic and therapeutic electri- cal apparatus operate on high-volt- age direct current obtained by means of mechanical rectifiers in the high- voltage circuit, which method in near- - always accompanied by spark dis- charges. Other tyvpes employ induc- tion coils which have interrupters in the Jow-voltage lines. Such apparatus is also often equipped with spark gaps to protect the apparatus agalnst surges. In working this kind of equipment, there are many intentional or acci- dental spark discharges. “In order to prevent the radiation of the effects of the spark discharges | into space and along power lines, it is neccessary to surround the aps paratus with metal screens and by- pass the power lines with condensers. The metal screen should be well | constructed and grounded and com- pletely inclose all apparatus produc- ing spark discharges. s “Types of apparatus which employ electron tube rectifiers or which rec- Director mist,” he assured me. world was mine if I had a slight idea as to how the gimplest set works.” junior, over to a friend's house to borrow a fixed condenser, 5o Smith could talk freel for the simplest set, and one that probably wouldn't wor! the need nectlon, an inductance of some kind, a crystal detector and a pair of ear Crystal detectors are of sev- eral varieties, some being very cheap and very pesky, while others that are scaled higher in price are quite sat- Isfactory. The wise radioist just goes to the accessory store and buys the The inductance, as I told you before, can'be merely a coil of wires that you can tap at any turn you desire. The telephones are a story but, for yeur purpose, just picture them as delléate electro- magnets operating upon a thin di phgram which, in vibrating, gives the | being the microphone at the phones. best they have. in themselves same registered on broadcasting “The next thing is to connect these simple units so that they |a circuit, for you know that all ele trical instruments operate only when | the circuits are complete rect. |ing in. energy lead-in ductance device, ergy is picked up from whatever turn of the inductance coil you tap and is then detector and through it tune cover how your big set works Is to start building a small soon the two meet and you're ready to talk super-heterodynes as fluently as forelgn exchange. You're an opti- “I'd think the one. Smith laughed. He said this while Smith, most favorable conditions, but an aerial, a ground sound valubs that are station. and Start with the aerial, and conducts it down wire to one end of the tuner. the i led to the crystal to the gre “You know that ti with the radio waves you The torage Butteries ed Called for and delivered AUTO [ | RADIO Open Daily Until 8 P.M. Bundays. 10 to 18 NOON 1d Reliable Battery Servic o 21 H St. N.W. E Pretty except under you con- form cor- for here is| where the radio frequencies are com- The aerial gathers the faint to the The en- tuner is used to bring the aerial-ground circuit into want to catch, but perhaps you forget that the frequencies of these high that you couldn't begin to hear them with the ear phones. waves may be alternating or oscillat- |ing several hundred times j Something has to be done to change waves are so radio r second. tify the high voltage without me- chanical contacts probably do not produce interference to radio recep- (Continued on Page 33.) Y VY VvV v v W L Wt aeion o Indlacapolis, Iadiana. ENJOYS LARGEST SALE OF ANY LOUD SPEAKER AVE you ever listened to radio over The Amplion? ‘The creation of the oldest loud peaker makers. The largest sell- ing loud speaker. Don 't fail to hear it—in comparison | Youwill agree it has the finest, purest, clearest, most natural tone. Ite sensitivity—its flawless repro- ductionover the entire musical scale—its vol- ume will amaze you, Dealer's name lnqlfdter- ature mailed on request. by o ‘THE AMPLION CORPORATION OF AMERICA Executive Offices: 280 Madison Avenue, New York Suite X Territorial Representatives: K. S. Byrd & Co. 221 N. 11th St. Philadelphis, Pa RADIO CALLBOOK Always Up-to-Date Changee Mailed to you Esch Moath for a Yoar Up-to-date international call book com- plled by Orrin B. Dunlep,Jr, Radio Editor, he New York Times. Inchades 4 colummns 1 readings, owners, wave lengtte, Bend $1 for book including month- Iy service for 78 sccurate. Correction pages have gummed edges easily attached in back of ‘the book. Send cash, check,stamps or mooey order. DUNLAP’S RADSO CALL BOOK SERVICE Bex 88, Flushing, N. Y. these into frequencles that are with- in hearing range. “Here's whera the cry figures. The phone series with the detector. tal detector inaugurate the new are connected in | 166 of the Metropolitan mean that one of the phone wires is[ 00 8t the new attached to the post of the detector | yn the tWer where the higher frequency is enter- | gig OP0iban Tower i ing, while the other 1s attached to| o0 @ COCH: — LUN, speech the post of the detector that leads to S the these Mtatio the ground connection. The phones, Y Hta therefore, register the audible sounds that the detector makes possible. “With such an arrangement, how- ever, you wouldn't hear a thing until the 'waves you were catching were varied at the broadcasting station by some one talking, singing or playing into the microphone.’ Just then Smith junior came run- ning back with the small artic known as a fixed condenser. Sm Beuigan and I stopped a moment to wat Ryder. him connect it in series with the phones—that s, he connected it across the circult of the phones just as though he were cutting the phones out altogether. | “Now what's that for? mith asked. The boy shook his head and mum- bled something about the Jones lad| getting better results that way | “What it does,” I said, “is to furnish | an easy path for the high frequency | to pass through the circuit. Other-| wise, it would all have to. pas: through the circuit of the phones and would be seriously hindered by reason | of the high resistance they offer. These condensers are a whole story in themselves, and you'll probab a number of them in your big se “Do you hear that? Smith ad dressed junior. “If we're going to zet anywhere with our rad know why we get results, Just guess at things. L they wer ners. Smith for a boom radio health Life roadcasting -seventh floor o Tower Monday x setting-up exe company Radio Play Announced. “Our Minister,” a farm 5 T3 Lty S Fers night by pla Thompson and ¢ ‘Return For $1.50 and work adio stock 403 C St. N.E. inc. 93095 X | Next Week, No. 10—Splitting Sta-| tions. (Copyright, 1925, 1 . Electric for Rent Ullman Feature Compare ifs Performance with that of Hundred - \ Dollar Sets Hoover on Radio Program. Secretary of Commerce Hoover wiff AR ons that will b up every morning for the rad cises arranged by th drama England, wil the W ,;3 was wirtten b: rge 1 WE |Loan Another 'Recharge and Your Radio Battery Stanton Battery Service Willard Service ‘ Vacuum Cleaners Insuranc{ studid thy =ht af b an W Factory-Mounted— Ready to Wire Youbuy Arr-AmaxSextor withallthe parts properly mounted on panel and baseboard. Wire it in one delightful evening. . . . . Price$42.00 Avr-Amax Jusior(1-tube) Price $22.00 Win an ALL-AMAX Set -— by submitting a SLOGAN. Aslk at Your Favorite Radio Store. Listen in with a real Radiola * RADIOLA means quality. RADIOLA 111 with two Radiotrons WD-11 and operates in- ly on dry batteries. RADIOLA 1Il-a *83. with four Radiorons WD- 11, headphones and Radiola For distance But it means value, too—not high price. Radiola III and III-a are probably the biggest values in radio today. They mean clear tone, dependable performance, fine construction. They mean all the fun of radio— of getting what you want—and getting it clearly— music, lectures, bedtime stories, sports—everything. And at small price! If you can’t begin with a Super-Heterodyne— tunzo in now on a $35 Radiola Ill —and get the fun! Buy it from a reliable dealer, expert in service and installation. - Radio Corporation of America “Sales Offices: 233 Broadway, New York 10 So. La Salle St., Chicago, Tl 28 Geary Street, San Francisco, Cal.