Evening Star Newspaper, July 21, 1926, Page 20

- RUDOLPH SPEECH ONWCAP PROGRAM Commissioner Will Describe President’s Cup Regatta Plans—Other Features. Plans for the President's Cup regatta, the annual classic for power boats, will be outlined by Cuno H. Rudolph, chairman of the Board of District Commissioners, in a speech to be broadcast tonight by station WCAP. The trophy is of solid gold with a value of $5,000. The first races Jfor the cup are to be held on the Potomac under’ the auspices of the Corinthian Yacht Club September 17 and 18. Commissioner Rudolph will make his speech from 8:30 to 8:4b o'clock. The remainder of WCAP's program is strictly musical. 1t will be opened with the outdoor concert of the United States Army Band at the Sylvan Theater. The Davis Saxophone Octet and the Ipana Troubadours will fol- low in the ordery named with their regular weekly concerts. After Commissioner Rudolph's talk, the Mohawk Male Quartet will give a 15-minute program, and at 9 o'clock the WEAF Light Opera Co. will sing rful opera of Jacques Offen- . “La Fille du Tambour Major" (“The Daughter of the Drum. Major") The Spanish Village Band will close .the program with two hours of dance music. WRC will broadcast this afternoon the concert ‘of the United Statesy Marine Band on the Capitol Plaza. The concert will begin at 5 o'clock. LocalRadio Entertainment Wednesday, July 21, 1926. NAA —Naval Radio Station, Radio, Va. (434.4 Meters). 8:45 p.m.—Weather Bureau reports. 9:55 p.m.—Time signals. 10:05 p.m.—Weather Bureau reports. .WRHF—Washington Radio Hospital Fund Committee (256 Meters). 11 to 12 noon — Current events for shut-ins (daily). WMAL — Washington Radio Forum (212.6 Meters). Silent. WRC—Radio Corporation of America (468.5 Meters). 5 p.m.—Concert by the United States Marine Band, Capt. William H. San- telmann, band leader; Taylor Branson, second leader, conducting, broadcast from the plaza of the Capitol. Early Program Tomorrow. 11:55 a.m.—Arlington time signals. 12 noon—Organ recital by Mrs. Par- ley D. Parkinson, broadcast from the Homer L. Kitt studios. 1 p.m—W. Spencer Tupman's Ho- tel Mayflower Orchestra. WCAP — Chesapeake and Potomac Telephone Co. (468.5 Meters). 6:25 to 6:30 p.m.—Base ball news. :30 to 7:30 p.m.—Outdoor concert by the United States Army Band, Capt. R. G. Sherman, commanding: Capt. Willlam J. Stannard, leader, from the Sylvan Theater, broadcast jointly with WEAF and other sta- tions. 7:30 to 8 p.m.—Davi Octet, from New York Cit 8 to 8:30 p.m—Ipana Troubadors, from New York City. 8:30 to 8:45 p.m.—Talk by Cuno H. Rudolph, Commissioner of the Dis- trict of Columbia, on the President’s Cup regatta. 845 to 9 p.m.—The Mohawk Male Quartet in popular songs. 9 to 10 p.m.—“La Fille du Tambour Major,” by the WEAF Light Opera Col,o from New York City. to 12 p.m.— “Spanish Village Band,” from Arlington roof, Wash. Ington. Early Program Tomorrow. 645 to 745 a.m—Tower health ex- ercises, from Metropolitan Tower, New York City. FIFTEEN MINUTES OF RADIO EACH DAY By Joseph Calcaterra Noted Authority on Radio. All Rights Reserved. Rey Prohibitea, "coroduction Saxophone THE ADVANTAGES AND DISAD- VANTAGES OF A TUBE'S LAPOR ACTION. PAI:TOECIL It is a well known fact that prac- tically every agency of nature which helps us can also hinder us in the accomplishment of our aims. ‘We cannot do without the sun, yet too much of its heat, resulting in raging forest fires and water famines, is about as bad as too little of it. Friction is a wonderful help in many cases, but a perfect nuisance in others. Water can sustain life and also destroy it. Such is the case with the prop- erty of the vacuum tube to generate oscillations ‘or produce waves of high frequency. Radio transmission and reception as we know it today would be impossible it it were not for this property of vacuum tubes to act as oscillators. Radio frequency current generators; modulators; continuous ‘wave transmission and reception; re- generative receivers; superhetero- dyne recelvers would all be impossi- ble if it were not for this property of the vacuum tube to generate high frequency currents, Property of *Tube. On the other hand, the only factor which limits the amplification in a receiver and makes the use of more than two stages of tuned radio fre- quency amplification’ particularly im- possible is this self-same property of a vacuum tube to generate oscil- lations. e The action of a tube as an inde- pendent oscillator for use in trans- mitter and recelver circuits is very interesting. A simple tube oscillator circuit consists of & vacuum tube, with a coil, tuned by a variable con- denser connected in its grid ecircuit. Another coll is connected in the plate circuit with suitable “B” battery, and the two coils are ptaced in inductive relation. to each other, with the polarity of the coils properly ar- ranged to produce oscillations, ‘When the circuit is properly tuned and adjusted, a very slight disturb- ance of the electrical balance of the circuit, such as tuning on the filla- ment current, or connecting in the plate battery, is sufficlent to pro- duoe the initial flare to set the circuit into operation. Builds Up Oscillation. Each additional amplified impulse fed back into the grid -circuit tends to fincrease the disturbing element and to build up the oscillation strength to higher and higher values, within the limits imposed by :the flattening ends of the characteristic curve of the tube. The action which ukn:“gum ‘might of the | coulf R THE MUTT AND JEFF—They Visit the Exposition and Collect Souvenirs. NOBODY CAN SAY T AIN'T PATRIOTIC. TVE SE€&n. EVERYTHING IN THe SESQUICENTEANIAL €XPOSITION AND I'VE GoT A FEW SOUVENIRS T TAKG Home! Ben FRANKUN 1S FoR MY SONL I'AM TAKING THAT TV ATTLE ATUE O NY LIBERTY BeLL TO MY WIFE, AND THAT PICTURe oF G€o. WASHINGTDA 1S For SIR SIDNGY! WHAT SoUVEAMRS DID Yov BUY ™ TAkE LONG RANGE RADIO ENTERTAINMENT WEDNESDAY, JULY 21, 1926 Programs of Distant Stations Scheduled for Eastern Standard Time 4:00—New York: Tea dance musle New : Book review: talk New Yo : Health talk: 5:00—Now York piiote], Waldort-Astorin cago: i m: stories Boston: Kidies: Kijb: Fido ¥ New York: Plano selection: son 3 oz Unel Schenectady : ren’s pmn}?e:g‘nr * ches 6:15—Newaric: Hotel Shelton Ensemb 6.30—"1?“0:1 (‘gnnv' 'n:“ cel Dolice report 7 Pitthburen | Dinner o oneer 5:45—New York: Employment opporinnities: ofchestr: i Grgan recital: Pal H Mooseheart, Tl Orgi Players: Palmer Victorians. T0 6:00—New York: Employmient opportunities: Ernie Golden's pin Orchestra: Tappen's Orchestra ... cal ocal solos: Orcheatr: ‘9‘“ TiMager Sto0k quot 7 Stock quotal “H6te1 Ensemble and Biickaone cag Chapman Tess . Y.: -bhifeve: Voo = uww‘;{f&“w 8 aid Kl ‘Dréam Daddy, Philadelphi: 2 Philadelphia: Vocal and ins le“u:\g C(:‘r;‘r;.tu()‘%l‘:gé”{h ;" Chimes o ; A avenport: Chimes concert 7:00—Hartford. Conn.: Traveler's Jongleurs and 01 Philadeiphia Radio 'Natus concert: mps; philharmo: W 1 oS8 W WCAP, AR, WTAG and WTAM from i Harmonizers tal; song_contest us Young ubade 8, LIB, WCCO, WOC ‘Auditorium ‘progy gram rise time; Fuitariste ews: surpi ;' ingtrumental s0los Ladies' qu Q Night' " hisical ‘program O iewater Beach Hotel, Grchestra ry Park program: Pryor's Ban Orchesira ' D) Seoteh. Detroit: Symphony Orcl P8 ... .. Pittsoursn: The Five Banjo Peppers Richmond Hill, N. Y.: Vocal ~and the Gondoliers Hartford: Carroll's Dance Philadeiphia: Song revie: violin and i vocal and Msirumenta) Chicago: Tefrace Garden ‘Orchestr solos. ¥ 2 Baltimore Moosehear! Venice " Orchest W market reporta: Spanish iev- ase_ball results: market reports. Dorts ianist: Punch and Judy: e ket String \Mnigf trumental soloists: Te: i nie congert i WTAG, orine rothers: Harmony Boy: Dodge and his Nantasket Sailors . Orus; loists WEEL Mgty sy % i 2 2 Drake 2222 S cuscomat 385 Wt .,mmfifl‘% .WBZ JWCX. e & 5s0s0ecaons Motsouas vt S 131320, & Ivantg Orchiestra. reci SEEREER - i RADIO INVENTIONS SWAMP .. OFFICE 1,850 Patent Applications . Are Pending, With Work Five Months Behind. Radlo patent applications are al- most overwhelming officials of the radio division of the United States Patent Office. Despite the fact that the number of examiners handling radio patent applications has been almost tripled, the radio division is losing ground before the greatest Influx of applications in the history of the office. There are now 1,850 radio patent applications awaiting action, as com- pared to 1,694 at the first of this year. The radio division iz five months behind the applications. The number or radio applications took such a jump following the popu- larizing of broadcasting that radio had to be divided into a separate dtvision in August, 1924. There now are 12 assistants in the radio divi slon alone. And still they are los- ing ground. » When the radio section was made a separate division in 1924 it was 2,100 applications, or eight months, behind. By the beginning of 1926 this had been cut to five months, or 1,594 applications. Since that time the number of applications awalting action has steadily grown. In February it was 1,686; March, 1,714; April 1,728; May, 1,756; June, 1,790, and July, 1,850, Profits of the government railways in_the Netherlands are increasing. W00, WeAE, L » S wo kaud ;n Bon SRo o i w0 comed oy 2! St 2 & 3 Won, $AT i 8B, A i . WEAR WTAM S 28 2 oon o o instrimenial’ ‘soloini VCAU iy SWS . Il.: Chilg P H ago: Traveiogus, seeing America with Billy Spears health talk Chics 8:30—Loulevilie: International auartet:. solo 8 0: & i usical features ... New York: The South Sea Islande 2 TO :00—New York: WEAR Light Opers Co, WCA WTAG, WCAE, WCSH “an Shicugo: %(ullgnl progran cago: Crawford's Orcl Chicaro: WATAQ Plaers : Carroll's D Hsn'nrd. Conn_; e’ O Philadelphia: Vocal and instrumental soloisis Richmond Hill, N. Y Sprinefield: _Instrumental Minneapolis: * Church " services . 9:20—New York: Radio talk: Hotel 10 TO 11 P.M. :00—Minneapolis: Musical program . 1000 S inen New g flel mond Hill, N. ¥.: Weat sdelphia: LArlie” Bittong'n Cheer artford, Conn.: News and weather Chicago, Henry; et intef m]lfi: o' o g e b, Uppm Club, » R udio - program XSb, tro W WCAU (.; Harmony Singers: Blue Bells of L. I.WAHG tions : gEeessees EhrRsheEs SEEaRsE il 11 7O 12 MIDNIGHT. 11:00—New York: Hotel McAlpin Entertainment icinnati : Re ot o B Bhai ! a larger disturbance in ths plate cir~ cuit, which, ‘being fed back into the grid circuit, . reinforces the dis- turbance in the grid circuit, thereby a greater disturbance in the | plate eircuit, and MMQ limits imposed by the chi c curve of the tube When the -oscillation s ‘buildiog up and becomes constant ampljtude. 3 > L ‘'he proper relation of the grid and | plai &fl- to each other, mdgg:é b HT T0 1 g e e Locomotives in Better Repair. Amerlcan railroads had fewer loco- motives in need of repair on July 1, this year, than at any time since ! compilation of locomotive records | .gan in 10@0..‘-‘:24 ; _ The total number of loc Face Completely Cover- ed. Cuticura Heals. "‘Il face letely covered| ly face was comp! with blackheads, which later turned to les that were hard, large ‘They itched and and scratching caused eruptions. 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