I Class JD£_L5£0 Book ■ Ha COPYRIGHT DEPOSffi Scanned from the collections of The Library of Congress AUDIO-VISUAL CONSERVATION at The LIBRARY of CONGRESS Packard Campus for Audio Visual Conservation www.loc.gov/avconservation Motion Picture and Television Reading Room www.loc.gov/rr/mopic Recorded Sound Reference Center www.loc.gov/rr/record _ I Reinartz Set Photo Diagram — See Pages 7, I RddioDi •7i EVERY Vol. IV Copyright, 1923 R. D. P. Co. Inc. CHICAGO, ILL., SATURDAY, JANUARY 13, 1923 No. 1 ACT ON NEW RADIO LAW COMMITTEE HEARS OPINIONS ON BILL MANUFACTURERS TO FIGHT R.C.A. TO END INDEPENDENTS ALL TO GET UNDER ONE FLAG Victors Over Radio Corporation Sub- sidiary Consider Joining in New Battle — Licensees Hold Meeting (Special to RADIO DIGEST) NEW YORK. — Organization of the inde- pendent Radio manufacturers for a fight to the finish against the Radio Corporation of America, has proceeded to the stage that many such manufacturers not holding Arm- strong licenses are expected to join forres with uhe gn up for & ;li defense. The -la.est group to consider joining in the fight on the side of A. H. Grebe and the Bunnell com- panies, is the Independent Radio Manufac- turers, an organization which recently won a decisive victory over the Wireless Specialty Apparatus Company of Boston, Massachu- setts, a subsidiary of the Radio Corporation of America- It will be remembered by those who fol- lowed the last mentioned suit, that the "Wire- less Specialty Apparatus Company was en- joined by the courts not to practice further advertising of a nature harmful to the char- acters of the manufacturers of crystal de- tector receiving sets who were not infringing certain patents said to be owned by the Wireless Specialty Apparatus Company. Fighting- Body Meets On Thursday. December 28, the Associated Radio Manufacturers, composed of Armstrong patent licensees, had a meeting for the pur- (Continued on page 2) iS '* Little Fred C. Shearer, Jr., the world's tiniest Radio an- nouncer, is a regular star on programs broadcast by WSB, The Atlanta Journal s Radiophone broadcasting sta- tion. He is seen holding his homemade s ban io, on -which he sometimes accompanies himself. The murderous mu- sical weapon to the left be- longs to Ernest Rogers, the WSB star shown below. Master Shearer tickled the nation's funny bone when he recently gave an imitation or Mr. Roger's famous "Willie the Weeper" No Serious Objections Raised — Measure Starts Regular Course (Special to RADIO DIGEST) WASHINGTON — Actual hearings on the important White Radio bill were commenced January 2 before the merchant marine committee of the House of Representatives. The main opposition to the bill came from the army and navy officials who oppose having their operators and stations licensed by another (the commerce) department. However, on all other point's the W and navy departments favored the bdl, Secretary of Commerce r said that his department favored the biE* ard had unm/late need Hoover IL lllH CleptlX Ijiii^AiU lUTTW'VW v~-~ .; - — for its enactment, R. P. Maximum, representing the American Radio Belay League, said that he spoke for the 16,000 licensed Radio amateurs who are members of the league and that he supported the bill in general. Secretary Hoover, Admiral Zigemeier, chief of naval communications; Major L. B. Vender, army signal corps; Eugene Sibley, postoffice department; W. A. Wheeler, department of agriculture; Alfred H. (Continued on page 2) Vaudeville and Radio were first linked up when Ernest Rogers, Radio singing star, was introduced from the stage of Loew"s Grand Theater, Atlanta, Ga., to his audience by a Radio message from WSB, "The Voice of the South" -x-x-x-x-x-x:- TWO NEW OPERAS GO ON ETHER FROM KYW "Barber of Seville" and "Samson and Delilah" Heard CHICAGO. — "The Barber of Seville" January 3 and "Samson and Delilah" on January 5 were the Chicago Opera pro- ductions broadcast by Westinghouse Sta- tion KYW during the opening week of the new year. Both operas were given for the first time during the season and afforded an unexpected treat for Radio- phans. The cast for "The Barber of Seville" (Continued on page 2) COPS USE KOP PLANT TO "COP" CRIMINALS DETROIT.— KOP is the Detroit police department Radio station. KOP is a very good call number — particularly for a police department. The station is used strictly for busi- ness purposes, no programs being broadcast. It is brought into use for hunting criminals, locating stolen auto- mobiles and other official police busj ness. It has proven its worth ^ eral recent criminal hunts. of a ^ry of which on produce sonnn , -*rd -m /shell >wner of the De Forest patents, and any statements to the contrary by anyone are mtrue. ... = "The Radio Corporation of American and ts associated companies are operating un- ler a license acquired from the DeForest company through the A. T. & T. Company md the Western Electric Company who are licensees under the De Forest patents. This icense which the De Forest company ^ranted is open to public inspection, and Ts recorded in the TJ. S. Patent Office. "Nevertheless, pursuant to its attitude ind policy of fairness, it cannot permit a misrepresentation of facts to accomplish what can be accomplished by fair legal methods. The apparatus manufactured and sold by the De Forest company is free from infringement of any existing valid patent of the United States owned by anyone other than the De Forest company, and frees the purchaser of such apparatus from any liti gation." NEW OPERAS ON AIR (Continued from page 1) included the familiar array of former seasons; Mines. Galli-Curci, Claessens, Messrs. Schipa, Rimini, Lazzari and Trevisan. Cimini conducted. "Samson and Delilah" was interesting from the standpoint of debuts, as Louise Homer as Delilah and Charles Marshall as Samson were heard for the first time n these roles with the Chicago Opera. Polacco conducted. FLEWELLING PRIZE CONTEST RULES 1. Contest is open to all Radiophans, whether or not they are subscribers to Radio Digest. Illustrated. The contest is open now and will close January 27 at midnight. Awards will be announced in the February 24 issue of this publication. 2. The object is to locate and award prizes on a competitive basis for the best Flewelling circuit receiving set entered. 3. Prizes are: First, $25.00; Second, $15.00; Third. $10.00; Fourth to Eighth (five prizes) inclusive, $5.00 each. 4. In event of a tie, equal prizes will be awarded both contestants. 5. Judges will be the Technical Staff of Radio Digest, Illustrated. 6 To enter the contest send working drawings and diagrams together with an. article of hom 1,500 to 2,500 words in length describing the making and operation ot an actual Flewelling circuit receiving set. The contestant must build this set and test it before entering the contest. The article must tell: (a) how to make the set, (b) how to operate it, (c) helpful suggestions for getting maximum results, (d) actual airline broadcasting station receiving range using only one tube, first employing only an indoor aerial but no ground, second, using a ground but no aerial, and third, if available, using only a loop aerial. Other combinations and notations on the antenna system used will be considered in the award of prizes. 7 In sending material for consideration in the contest, exclusive publication rights are automatically given to Radio Digest, Illustrated. All articles published, but not awarded prizes, will be paid for at regular space rates. Unused manuscripts will be returned to contestants. 8 In deciding the winners of the contest the judges reserve the right to call for any set entered to be sent in for examination and test. Tubes. A and B batteries and phones will not be required in sets sent in for testing. 9. Manuscripts will be judged from the standpoints of neatness, clarity of expres- sion," completeness, and actual tried success of the set described. 10 Originality in the use of various parts of apparatus other than shown by; Radio' Digest in the Flewelling circuit heretofore, is encouraged and even recom- mended See Rule 6, however, for method to be used in determining the range. NEW YORK'S SHOW DRAWS BIG CROWD MANY ATTRACTED BY EN- TERTAINMENT FEATURES David W. Griffith, Wm. J. Burns, Chaun- cey Depew and E. H. Armstrong Keep Interest Alive Seven New 360-Meter Plants CHICAGO. — Seven new plants managed to <*et the date 1922 on their 360-meter broadcasting licenses by obtaining their licenses during the last week of December. Station WCAE, Pittsburgh, Pa., was also granted a Class B license, carrying with it the use of a 400-meter wave length. The new plants on 360 meters are: WRAM, R. E. Compton and Carthage College, Carthage, 111.; WQAC, E. B. Gish, Amarillo, Tex.; WPAW, Radio Installa- tion Co., Wilmington, Del.; KFCM, Rich- mond Radio Shop, Richmond, Calif.; WPAX, S — W Radio Co., J. R. Shumate, Jr., Thomasville, Ga. ; WPAV, Paul Tin- etti & Sons, Laurium, Mich.; KFAZ, C. H. Weatherell, Reedley, Calif. The Government station at Estevan Canada, reeentlj' established communica- tion with Raratonga, New Zealand, 6,500 miles distant. CONTENTS Radio Digest. Illustrated, Volume i. Number 1, publisked Chicago, Illinois. January 13, 1923. Published weekly by Badio Digest Publishing Company, 123 West Madison Street, Chicago, Illinois. Subscription rates. Yearly Five Dollars; Foreign, Six Dollars; single copies, Ten Cents. Entered as 6econd-class matter April 27, 19->-> at the postoffice at Chicago, Illinois, under the Act of March 3. 1879. "All the Live News of Radio" 1 to 6 Flewelling Prize Contest Rules , /. , 2 How They Do It at WDAP'S Plant 5 Receiving Records Contest 6 The Reinartz Set in Photo Diagram 7 Radiophone Broadcasting Station Directory, Part II, Station Schedules from WAAX to WLAR 8 Editorials; Condensed by Dielectric; Indigest, Humor Column , 10 A-B-C Lessons for Radio Beginners, Chapter II, by Arthur G. Mohaupt 11 Panel Shield Prevents Body Capacity; Ten Variations in Grid Leak Increase Signals; Six Workshop Kinks 12 How to Make and Operate the Reinartz Receiver, an Explanation of the Photo Diagram Shown on Page Seven, by H. J. Marx 13 Radio Digest Standard Conventions; The Reader's View 14 Questions and Answers IS Radio Illustrated, a Page of Pictures 16 Looking Ahead NEW TORE. — Closing with exhibitors leaving late Saturday niight, December 30, the American Radio Exposition at Grand Central Palace here broke all previous records for previous Radio shows. The great crowds, growing every day of the ten days, were literally jammed about the booths and entertainment features on the last night. One feature which held the interest of all was the standard 500-watt broad- casting station which was located on the main floor. Hundreds of well-known per- sons were accorded the honor of broad- casting from the show's station. Show Program Excellent The excellent character of the program arranged for the show undoubtedly caused many persons to attend who might not have done so otherwise. The entertain- ment was not confined to Radio, but in- cluded motion pictures, crime detection and other distinct fields in its scope. On the day following Christmas, Rich- ard Barthelmess was awarded a photo- play medal for his acting in "Tol'able David." Later during the same evening, David Wark Griffith broadcast from the show's station on the subject, "The Type That Need Apply." His talk described the best type of person adaptable to a motion picture career. "William J. Burns Talks On Wednesday night, December 27, William X Burns told the crowd attend- ing how Radio was being used in the detection and capture of criminals. On the same evening Julius Tanner, vaude- ville star, and "Uncle Dave" Cory, famed writer of children's stories, contributed to the show's popularity. On the next night Chauncey Depew attempted to break some broadcasting records. A great many years ago when the wired telegraph first reached around the world, Mr. Depew gave an exhibition of fast sending and his message circled the globe in twenty-eight seconds. Then Thomas A. Edison cut two seconds from Mr. Depew's time. When the^. new mark was recorded Mr. Depew contended he was the best amateur, as the great in- ventor was a professional. "The Major" Shows 'Em How One of the daily features of the exposi- tion was a demonstration of Radio re- ceiving by Major Edwin H. Armstrong, under the auspices of the Radio Club of America. Special apparatus using °-9 vacuum tubes was constructed and u? . for this purpose and an extraordinary system of amplification was used so that the receiving programs could be heard distinctly and clearly by the crowd. Armstrong worked at the show in a special glass enclosed room on the mez- zanine floor. Radio Comes to Rescue of Lonely, Historic Island More About Reflex Circuits, is a feature by Harry J. Marx in the next issue, January 20, of Radio Digest. Mr. Marx has uncovered some interesting new data regarding these "trick" circuits, and will show and tell about three more hook-ups for the home experimenter to try out. Making one tube "work overtime" is always an interesting subject. Buy the next issue and learn more about this type of receiving circuit. A-B-C Lessons for Radio Beginners, Chapter III, will appear in next issue. The "green", novice should not miss any of these simple explanatory articles by Arthur G. Mohaupt. His next chapter will take up the subject of oscillating circuits and the high frequency currents established in them. As these form the real basis of Radio operation, no novice should miss the next chapter. Radio Receiving Sets in Photo Diagram, one of the popular original features of the Digest, will illustrate the new Federal Radio frequency receiving set. This will appear in the January 20 issue. Place your order with the newsstand dealer today. The Effect of Religious Broadcasting, is the subject of an article by Vera Brady Shipman to appear in an early number of the Digest. Will Radio aid in the propagation of Christianity? Does the broadcasting of various denominations* services have a unifying effect? See what this interesting article discloses. The State, City Station Index, to the Radiophone Broadcasting Station Directory, together with the third and last part of the station schedules, will appear in the Digest. Imitation is the sincerest form of flattery. This service is original with Radio Digest, and is the best directory of such stations that anyone can secure. Radio Takes Role as Show Booster SYDNEY, AUSTRALIA. — Radio has come to the rescue of lonely Polynesian Pitcairn Island, which loomed large in fiction and history as the refuge of the mutineers of the British sloop Bounty, years ago. Until now the 200 islanders have been compelled to depend for their news of the outside world upon the occasional visits of ships. Radio equipment has just been | installed, however, and will do much to '-"-e the isolation of the island resi- ! ,0m%eLttarTnn/theenin0ternae-|BE SURE OF YOUR WEEKLY COPY ie. I BY SUBSCRIBING NOW Newsstands Don't Always Have One Left SEND IN THE BLANK TODAY WHEN YOU WANT Radio Digest YOU WANT IT! Publisher, 4-1 Radio Digest. Illustrated, 123 West Madison St., Chicago, Illinois. Please find enclosed check M. 0. for Five Dollars (Six. Foreign) for One Year's Subscription to Radio Digest, Illustrated. Name Address City State _ Broadcasts Effective in Calling Wide Public Attention to Los Angeles Pageant of Progress LOS ANGELES, CALIF.— Radio was re- cently presented to the world in the role of "A Messenger," by the Los Angeles Chamber of Commerce, when they decided to broadcast information concerning the Pageant of Progress and Industrial Expo- sition, which they were to present to Southern California and the world. For several weeks before the opening and during the two weeks of the Exposi- tion which was held a short time ago, Stations KHJ, the Los Angeles Times; KOG, the Evening Herald, and KWH, the Los Angeles Examiner, included Pageant of Progress news, information and pro- grams in the broadcasting of their news bulletins. This was the first time that Radio has been brought into play in connection with an exposition of any kind on the Pacific Coast, and in which the information was broadcast by the newspaper stations. The news matter, broadcast from an edu- cational standpoint, proved from late re- ports to have been more than the success expected. An experimental twenty kilowatt vac- uum tube at Rocky Point, Long Island, transmitting on a wave length, of 19,000 meters, recently handled commercial trans- Atlantic Radio traffic with Great Britain and Germany. ure or piece ■ class in a d to its alma i eiving outfit. RADIO Die; E S T ILLUSTRATED START 'HOOK NIGHTS' FOR ENTERTAINERS BUT NO RADIO CABBAGES FOR THESE AMATEURS Everyone Gets Chance to Broadcast "Act" from New York Plant for Weekly Pr'ze NEW YORK. — The Society Radio of Radio Artists and Audiences, established some months ago to effect a closer rela- tionship between the audiences of Station WHN and the artists who entertain them, held the first of a series of amateur nights on Thursday evening, January 4th. This amateur night was comparable in every way with an amateur night which one might see in a vaudeville theater, and it marked the first opportunity that has been afforded to novice, amateur entertainers to broadcast from an eastern station. Anyone and everyone is eligible to com- pete for the prizes w-hich are offered at WHN each Thursday evening. There is no entrance fee. All that is required of a would-be prize winner is that he write to the station, telling the nature of his act and the length of time it will take to broadcast it. As the time for amateur broadcasting is limited to one hour and a half, no one person will be allowed more than five minutes, nor will it be possible to admit everyone who asks for a place on the program at any one night. However, letters will be answered in the order in which they are received and each person will be advised when he is to appear at Station WHN to try for a prize. Listeners-in are the sole judges of the winners, and they cast their votes by tele- phoning to the station at the conclusion of the program or by writing their deci- sions in a letter so that they will reach the station before Thursday of the follow- ing week. The correct address of the sta- tion for those who wish to enter the con- tests or vote for winners is: Ridgewood Radiophone Station WHN, Ridgewood, Long Island, X. T. NEW HONDURAS PLANT WORKS NEW ORLEANS WNU Handles Traffic of Fruit Firm's Tropical Station NEW ORLEANS, LA.— Another lap to- ward New Orleans' goal as a Radio center is the opening at Tegucigalpa, Honduras, of the first of a number of Radio stations under the auspices of the United Fruit Company. The formal opening took place December 1, and traffic was handled by WNU, the company's New Orleans sta- tion, for several hours. The Honduras station is among the first to generate the high frequency current by means of a 20-kilowatt triode tube. Ac- cording to Crawford H. Ellis of the United Fruit Company office at New Orleans, virtually no trouble with static, usually bothersome in the tropics, was experienced between "WNU and the new- station. Five new stations are being built in the tropics by the concern. At New Orleans the 50- kilowatt transmitter is to be replaced by tube of 20-kilowatts, and greater range is expected. , Two New Tacoma Plants; City Sets Mark for Size TACOMA, WASH. — Two more new broadcasting stations have brought the number in Tacoma up to five, considered a record for a city of 100,000. KFEJ, the Tacoma Radio News Service station, opened up in December with records, news bulletins and advertising material. The idea is a new one, the station broadcasting the names and lines of various firms who sign with them, advising auditors to call the office of the broadcasting station for prices. The other new station is BE1, the Third Signal Company station at Camp Lewis, on the outskirts of Tacoma. The army station operates on 400 meters, sending music and lectures five nights a week. BRITISH LICENSES GO TO NEW HIGH MARK WASHINGTON.— Between March and November the number of experimental Radio licenses in England, which are granted only to those competent to make useful con- tribution to Radio research, increased from 8,000 to 18,000. An even greater growth is expected with the recent opening- of several broadcasting sta- tions throughout the isle. MASSACHUSETTS HIGH IN CROSS OCEAN WORK BOSTON, MASS. — Stations in Massa- chusetts form a large percentage of those heard across the Atlan- tic in the amateur transatlantic ten day test, .over 52 New England sta- tions were heard. Among the most notable achievements was that of S. S. Heap of Atlantic, Mass., who got his call across with only a 5-watt trans- mitter. LEARNING WHAT TO COOK TODAY The old problem, "What shall I cook today?" no longer bothers modern housewives who have found a ready solution in the Radiophone. Many recipes and menus are broadcast daily from various large stations over the country by leading chefs and cooking experts. The Mrs. Newly- wed believes it a great help. © K. & H. Radio Helps in Columbus Charity Drive for Kiddies COLUMBUS, O. — One of the most touch- ing events connected with the annual charity "newsie" drive for the poor kid- dies of Columbus, held each year by prom- inent business and professional men of Colur jus, who sell special editions of The Ohio otate Journal for charity, was the Radio appeal broadcast by Attorney Gen- eral John G. Price, of Ohio. Mr. Price sought the co-operation of Station WPAL, of the Superior Radio & Telegraph Equip- ment Company, and was given a place on the weekly program before the charity drive. The smallest Radio set in the world contained in a ten-gxain capsule, was re- cently exhibited in New York city. DAY-LONG SABBATH SERVICES AT KYW MORNING UNTIL EVENING CHURCH BROADCASTS "Old Central Church," Spiritual Haven of Strangers, and Sunday Eve- ning Club Co-operate CHICAGO. — Sunday, December 24, Sta- tion KYW introduced its latest broadcast- ing feature, church services continuing intermittently from 11 A. M. to 9 P. M. This was accomplished by arrangement with the board of directors of the Sunday Evening Club, which gave permission for the installation of a special telephone wire connecting Orchestra Hall with the station. This now makes possible the broadcasting of the Central Church and Sunday Evening Club's services in addi- tion to the regular chapel services con- ducted by the leading pastors of Chicago churches in KYW's studio at 3:30 p. m., Central time. Central Church Known to Transients If there is such a thing as a heart-throb or flash of sentiment in the life of a great city, that spark flashes in Chicago when mention is made of "Old Central Church" which has been the spiritual resting place for years for strangers within the walls of the city. The services of Central Church are conducted by Dr. Frederick F. Shan- non. For seven years before coming to Chicago Dr. Shannon was pastor of the Reformed Church of the Heights in Brooklyn. The feature of the Sunday Evening Club's services is the musical program furnished by a choir of 100 voices under the direction of Edgar Nelson, who was decorated by the King of Sweden. The sermons are delivered by men of national repute, and the entire order of service has long been popular with Chicago residents. POEMS BY LONGFELLOW GO ON ETHER AT WOR Lecturer Honors Poet in Broadcast from Newark Plant NEWARK, N. J. — Oscar I. Lamberger, Ph. D., author and lecturer, broadcast a most interesting talk from L. Bamberger Station WOR recently, entitled. "Longfel- low," illustrated by Longfellow's poems. Dr. Lamberger is a graduate of Leip- zig University and was assistant professor of comparative literature at Leipzig Uni- versity, 1899-1S01. He is well known in Germany and England, chiefly for his translations of English and American classics into German. In conjunction with the late professor, Charles Sprague Smith, of the Peoples In- stitute, N. Y., and John Collier, he organ- ized "The National Board of Review," an organization which on account of its pow- erful influence has done much towards- the making of high grade motion-pictures, ed- ucational and otherwise. Dr. Lamberger is now President of the Longfellow Liter- ary- Society with headquarters in Brook- lyn, N. Y. Plane, Storm Victim, Calls for Repair Squad by Radio LONDON, ENG. — How Radio can speed ahead and tell of trouble has been illus- trated in a recent incident in the airplane service between France and England. A plane in the London-Paris run was dam- aged in a storm over the English Chan- nel, the damage making it necessary to stop as soon as land was in sight. The pilot realized this, and phoned the extent of the damage and the repairs believed necessary. Upon his landing near Calais, he found the mechanics ready to work to replace the damaged parts. Fifteen minutes later, the plane was in condition to continue its trip with its twelve passengers. The plane was only ten minutes late in its schedule when it arrived in Paris. THE ANTENNA BROTHERS Spir L. and Lew P. She Heard His Call of ~n on e Radio world w?" - NationpJ* The - ig ft;- an/1--* RADIO DIGEST ILLUSTRATED REBUILDING OF WBZ STRENGTHENS VOICE SURMOUNTS ETHER BAR TO ALL NEW ENGLAND Improved Springfield Station Uses Two Oscillators and Three Modulators of 250 Watts Each By B. F. Kin? Jlany Kadiophans have doubtless no- ticed that the voice of WBZ, the Westing- house station at Springfield, Mass., is considerably louder and clearer than it was last winter. There is a good reason for this improvement. The station was entirely rebuilt during the summer and is now one of the finest in the country. The original station was opened in Sep- tember, 1921, and was one of the pioneers in the broadcasting field. Only two or three stations now in operation have a longer period of operation record. WBZ was designed to serve New England only, so that its power was limited. But, though it was found to have a consistent range of about 500 miles south and west under good atmospheric conditions, it did not entirely fulfill its purpose. All New England. Hard to Beach New England is peculiar from a Radio standpoint, and for some unknown reason there were several areas in this section that WBZ could not reach. The new sta- tion, however, has remedied this situation and now can be heard clearly on a detector tube alone all over the northeastern part of the country. The new transmitting apparatus is of the same type as that used by Stations KDKA, KYW, and WJZ, although some- what smaller. It has two oscillating tubes and three modulator tubes, each rated at 250 watts. Ten-volt alternating current for tjie filaments is supplied by a trans- former from a 110-volt circuit, and 2000- volt direct current for the plates is sup- plied by a motor-generator set located out- side of the station and remotely controlled from the transmitter. The tubes are kept cooled by a fan mounted behind the transmitter. Antenna on 142-Foot Towers The transmitting antenna is supported by two structural steel towers, 142 feet high. These towers are located on the roof of the company's Radio factory so that the height of the antenna above the ground is 200 feet. The antenna is made up of six phosphor-bronze cables spaced five feet apart and is 220 feet long be- tween insulators. A counterpoise, of simi- lar dimensions, is suspended 130 feet below the antenna. Special arrangements have been made to prevent breakage of the antenna and counterpoise by ice, and a heavy current can be circulated through the antenna wires and down leads to prevent accumulations during ice storms. Shirred Monk Cloth Cuts Out Echoes The studio, which is located on the third floor of the building, is a room of 20 by 23 feet. Heavy carpets on the floor and shirred monk cloth on the walls and ceil- ings eliminate all echoes. Among the musical instruments used are a Knabe- Ampico reproducing grand piano, a Vic- trola, and a Brunswick talking machine. The condenser type microphone, which is standard at present, is hung from a movable and adjustable stand. Its output passes through three stages of amplifica- tion before it goes to the transmitting room, where three more stages of amplifi- cation are provided. The studio amplifiers are housed in a cabinet padded with felt. A small receiver with a loop aerial is used to check the character of. the perform- ances broadcast. Schedule of Operation WBZ operates every night from 7:30 to 9 P. M. Eastern time. Its regular weekly program includes children's stories, agri- cultural reports, addresses, and music. On Sunday, chapel services are broadcast at Z P. M. and church services at 8 P. M. A number of well-known people have ad- dressed the Radio audience from WBZ, including the governor of every New Eng- land state, and Dr. Charles P. Steinmetz. It is stated that more than 2,000 hours of operating time, conservatively esti- mated to be worth $150,000, has been saved to navigation interests in the Great Lakes in a single season by Radio advice as to weather conditions. Carter " TV- WA Y" Radio Plug take two head sets and all types cord tip ter- minals. Price $1.50. Write for Bulletin on Car ter "HOLD-TITE" Jacks and other products CARTER RADIO COMPANY, 209 South Slate Street, CHICAGO THE ONLY KNOB and DIAL WITHOUT A SET SCREW ASK YOUR DEALER "*->=. 4 in., $1.50 3 in., $1.00 'NOB & DIAL CO., Inc. eet NEW YORK CITY Growth in Radio Interest Keeps Uncle Sam's "Lab" Staff on Jump Information Service Installed for Fans, Experimental Investigations Conducted, Radio Relay Perfected, Improvement Made in Various Outfits as Part of Bureau of Standards Work WASHINGTON. — During the past year there has been a remarkable increase in popular interest in Radio communication, according to Dr. S. W. Stratton, former chief of the Bureau of Standards. Dr. Stratton continues in part: "This has been greatly stimulated by the fact that there has become available Radiophone apparatus of satisfactory per- formance, by means of which market and crop reports and other news, music, and entertainments have been transmitted broadcast and received by many persons. This general interest has resulted in a large increase in the bureau's correspond- ence on Radio subjects. Dozens of letters asking for Radio information are received each day, and many of these are of con- siderable importance. Badio Information Service Required "In order to answer such inquiries, as well as to keep the bureau's staff in- formed on current developments, it has been necessary to devote much time to the maintenance of a Radio information service. An unusually large number of visitors have called at the Radio labora- tory, and in order to avoid continual in- terruption of the regular work in progress special arrangements have been made for demonstrating the exhibits of most gen- eral interest. Members of the bureau have delivered a number of lectures on Radio subjects. Electron-Tube Generator Research. "Theoretical and experimental investi- gations were conducted on the power out- put of electron-tube generators. A paper was prepared for publication on methods of testing and rating electron-tube gen- erators. A special form of electron-tube generator was developed for producing sparks of high frequency for use with recording apparatus for recording the pressure cycle in a gas engine cylinder. Work on Badio and Audio Amplifiers "Special amplifiers, using both Radio frequency and audio frequency amplifica- tion, were developed for particular pur- poses, including direction finding, Radio- phone communication with surfboats of the Coast Guard service and reception of material sent broadcast by Radiophony. "A 5-stage amplifier was developed which used 60-cycle alternating current to supply power for the filaments and plates, instead of the usual storage and dry bat- teries. Both Radio frequency and audio- frequency amplification are used in con- nection with a crystal detector. This am- plifier has aroused considerable interest, and is described in a paper which has been published. A special amplifier was developed for amplifying variations in di- rect current, or low-frequency alternating currents. Badio Belay Perfected "A Radio-operated relay has been de- veloped which employs audio frequency tuning and has been found effective for operating other mechanisms. Such a relay can be used for the remote control of BALDWIN Master Type Dealers: New Discounts Hudson-Ross, 123 W. Madison, Chicago 1UAGNJWOK JKl Sladid Dfie Reproducer Suprem® IN Radio, there are no substitutes for the Magnavox electro- dynamic principle. When you purchase Magnavox apparatus you assure yourself the utmost satisfaction. R»2 Magnavox Radio with 18-inch horn (as illustrated) Forstore demonstration, large audiences, dance halls, etc. . $85.00 R-3 Magnavox Radio with 14-inch hotn For homes, offices, ama- teur stations, etc. $45.00 At gooddealers everywhere The Magnavox Co Oakland, Cal. mechanisms by Radio. The relay is rugged and highly selective, and is very useful when moderate strays or consid- erable interference exists. By proper audio frequency tuning it has made clear tape records of messages when interfer- ence was so severe that an experienced operator could not copy the message at all by the use of his phones. It can be used for reception at fairly high speeds. Relays of this type have been constructed for various applications in the Signal Corps and other branches of the Govern- ment service. Equip Surfboat; Communicate Five miles "At the request of the Coast Guard, Radiophone transmitting and receiving equipment was installed on a 36-foot mo- tor-driven surfboat, and successful com- munication in both directions was main- tained during a demonstration over a dis- tance of about 5 miles from shore. "The antenna used on the boat was a single-turn coil antenna, of which the hull of the boat formed a part. A special mul- tistage amplifier was constructed for use in this work. Pind Better Alcohol for Arcs "An investigation was conducted to de- termine the most satisfactory denaturing formula for alcohol used to supply hydro- gen in the arc chamber of small arcs, and several kinds of denatured alcohol were found which gave more satisfactory op- eration than ethyl alcohol, which was used as a comparison standard. Preliminary developments were made on a short-wave arc using electrodes submerged in alcohol. "Improvements were made in a method of locating an airplane in flight transmit- ting Radio signals. Two trucks equipped with crossed-coil direction finders were used, and results of satisfactory accuracy were obtained. Other work has been done on direction finding and related problems for the Air Service. Test Makes of Receiving- Sets "A comprehensive investigation has been made on the construction, design, and performance of representative types of Radio receiving sets. Methods of testing RADIO MAILING LISTS 12,400 Radio Dealers, i-overine U. S. by statee Per M $ 7. 50 1,614 Radio Mfr,.. coverine U.S. by states. PerliBt 15.00 1.757 Radio Supply Jobbers, coverinE U. S. by states. Per list 15. 00 260 'Radio Stations Pe: Ii?t 4.00 257 Mfre. who make and assemble complete Radio Sets Per list 4.00 25,000 Radio Amateurs & Mfrs. of Radio Stations. Per M 7. 50 Ask for price list covering Canada and England. Send remittance with orde . Trade Circular Addressing Co.. 16G W. Adams St., Chicago, III. and standards of performance have been developed for receiving sets, and publica- tions covering various classes of sets are in preparation. Some of this, work has been conducted in co-operation with com- mercial testing laboratories and retail trade organizations. "The -bureau has co-operated with the National Fire Protection Association in the preparation of a revised rule for Radio installations for the National Electrical code." Makes Music on Glasses with Fingers for WEAF NEW YORK. — One outstanding musical novely of the present season broadcast from Station WEAF, of the American Telephone and Telegraph Company, was that of recent date when Charles Wold, famous for his work on musical glasses, gave a special program. For many years Mr. Wold has toured the country with these musical glasses, fifty-two in all. Mr. Wold wets his fingers and by rubbing over the edges of the glasses, which con- tain no water, the skill of his touch pro- duces music of exquisite sweetness. Isaak Newlin, an Alaskan Eskimo, in his early twenties, is a Radio operator of marked ability. FOR YOUR RADIO Saves you 50% of the usual coat and you get an unconditional WRITTEN 2 YEAR GUARANTEE Best battery buy on the market to* day. Thousands of satisfied users. e-Voit 40 Amp. 'SIEIIcVaVIO^ 6 voit *« 950 6-voit $4 4.50 WAmp. J.4&=:|| 100 Amp. **»== AtA mboat our rubbtr container* WORLD BATTERY CO. 60 E. Roosevelt Rd. — Dept L. CHICAGO, ILLS. New York Of 370 Seventh Ave, 44T X J HEN happi- V V ness °r ca" lamity is about to come, it can be known beforehand." — said Confucius. Insure complete Ra- dio happiness with a Grebe Receiver. Licensed under Armstrong TJ. S. Pat. No. 1113149 A. H. GREBE & CO., Inc. Richmond Hill, N. Y. DELICATE SOLDERING Both the manufacturer's and amateur's problem on all fine work is readily solved by the instrument constructed for this particular purpose. A\ The Post Soldering Iron Platinum Heating Unit Interchangeable Tip Universal Current MSTS $6.00 ONE-HALF ACTUAL SIZB Awarded Certificate of Excellency. N. T. Evening Mall Badio Institute From your dealer or write $6.00 POST ELECTRIC COMPANY, D«" S'eV?or£""1s RADIO DIGEST ILLUSTRATED HOW THEY DO IT AT WDAP'S PLANT She- at the Wt .^^hSS semblc of WUAr broadcasting staljon. Ch'«g-& »n*«r> standing a of the orchestra. »elow deliver- dent Coolidge, •»".?*„";, Pallophoto- f„eg an address mto 'he "<„ dcast ^ phone, whj' en • , from WUT. voice, recorded on a n • were nat- Schenectady. The resenerg beheved u/al ^tTfi^'fi'** hand" the voice to De "Jazz Nomads" Send Wicked Tunes Into "Doughnut" as Lady Visitor Looks On Reporter Gets "Inside" Tells How Drake Hotel Plant, Chi- cago, Puts Sunday Evening Program on Air By V«ra Brady Shipman "Say, fellows, aren't you going to play 'Three o'clock in the Horning?' You've been on fifteen minutes and we've had twenty requests." And the jocular voice which the "Drake Radio Family" knows so well announces — '■ — "By special request the Campus Nomads will play " I visited the Drake broadcasting Station "YVDAP Sunday evening. The broadcast- ing room is not so privately enclosed as many, and the chance guest can get a won- derful idea of how they do it at WDAP. ("We do Atlantic Pacific," as the an- nouncer adds.) Microphone Resembles Doughnut The room is heavily hung with draperies on three sides with the fourth side open. Before a microphone which looks like a large black doughnut with smaller dough- nuts around the outer edge, the orchestra plays, the soloist sings and the speaker talks to the great unseen, as though the audience were hidden in that doughnut. A red electric light bulb flashes on when the microphone is open, when the operator in the adjoining room opens the switch which opens the air to the broadcasters. Intense silence drops at the moment the light flashes on. The orchestra if not ready, quickly assembles itself, and in- stantly the opening chords are sounded. When the number is finished, silence until the red bulb goes out. Then the hubbub resumes until the next red flash. Glimpse at Musicians The Sunday night program I heard was given by the Campus Nomads, a group of five Northwestern University students who are jazzing their way to knowledge, and the Drake Hotel Orchestral Ensemble of five soloists under the direction of Henry Sellinger. Also pianologues by Jean King Leighton with Anne Mortensen Herre at the piano, were sent forth over the air in Miss Leighton's regular fashion of interesting dialect. Two grand pianos in the broadcasting room are used for every kind of musical entertainment, all of which are under the personal direction of Mrs. Saida Bal- lentine. The Drake station, which unlike others in Chicago, is privately owned, began its existence atop the Wrigley building a year or so ago and is owned by two Chicago men, Thorne Donnelley and J. Elliott Jenkins. Goes to Transmitter Boom By the courtesy of the announcer-oper- ator (oh, how he hated to let a woman in, and I can't blame him), Ralph Shukart, otherwise called "The Sheik of the Drake," I was allowed to go silently into the oper- ating room. Here the operator broadcasts his announcements through the same kind of a "doughnut" microphone, which catches every room sound as well as long- distance wire telephone interference. Here the operator listens in on the musi- cal program and times his announcements accordingly. The second operator, M. L. Green, courteously gave me some of the data needed for this story. Pine Peeling- Pervades Plant I meant to stay just a short time, but I found upon leaving that I had been there nearly two hours. The time flew and the informality, the courtesy from the owner on down to each assisting operator, and the comradeship which exists throughout this station strengthened the feeling that the listener in always obtains of the "Drake family." As I left the top floor of the Drake, the boys at the telephone were still an- swering "Oh, yes, Madam, they have played 'Three o'clock' and I am sure they will play it again before the evening is over, Yes, Madam, glad you called." Close Large Business Deal by Air; 'Bugs' Aid COLUMBUS, O.— Except for the cus- tomary written confirmation and accept- ance, a business deal involving several hundred dollars brought to a successful close by Radio recently by the Columbus State Company, it has been announced by H. W. Webb, secretary and treasurer of the company. Amateur operators were the exclusive "agents" in this matter. Frank Hahne, tin and sheet iron worker of Savannah, Georgia, is an old customer of the Columbus Slate company and also is a code Radio enthusiast. On Thanks- giving morning, he sat down to his trans- mitting set and sent a message to the Columbus firm. It was picked up by an amateur in Cincinnati, who in turn relayed it. R. C. Bohannan, with the Erner & Hopkins company, Station WBAV, received the message at his home and called Mr. Webb on the telephone. Mr. Webb at once quoted by telegraph the price on sea green slate, according to the amount wanted. The next day, ' Hahne sent the written confirmation and also a Radio confirmation. A return telegram acknowl- edged the order and the deal was closed. This is believed to be the first time in the Radio history of Ohio that business has been negotiated through amateur Radio stations. Device Photographs Voice on Film Reproducing Message for Broadcast Flickers of Tiny Mirror Record Speech on Pallophotophone Film — Developed Strip Gives Natural Tones — Weeks', Denby's and Coolidge's Speeches Reach All Corners of U. S. at Once by Means of Instrument By B. S. Beach, Christmas greetings and messages to the people of the United States from Vice President Coolidge, Secretary of War Weeks and from Secretary of Navy Denby were broadcast on Christmas eve from Station WGY, the General Electric trans- mitter at Schenectady, N. Y., without their being present, or speaking, in fact. This was the first time that three leading executives of the country ever attempted to extend their greetings in a way that reached the four corners of the country simultaneously. The feat was made pos- sible by use of the Pallophotophone, a new device for photographing the voice and later reproducing it with perfect clear- ness. How Xt Was Done The machine was set up in a hotel in Washington ten daj s before. The vice president and the war and navy secre- taries spoke into a small recording horn. As they did, their voices caused a small diaphragm to vibrate to which is attached a tiny mirror, scarcely smaller than the head of a pin. This oscillation or flicker- ing of the mirror reflected a beam of light upon a moving photographic film, thus recording the human voice accurately with the overtones, the delicate shadings of speech, and all other characteristics which make one voice sound different from another. Develop Film, Reproduce Messages * The film was then taken to Schenectady and was broadcast twice on Christmas eve from the WGY studio, the first time at 7:30 o'clock Eastern time, during the regular Christmas program and then again at 10:30 o'clock for Radiophans in the western states. In reproducing, the film is passed before a strong ray of light and the zigzag mark- ings photographed on it by the sound waves create electric waves which pass through an arrangement of vacuum tubes and produce sound waves again which are sent directly into the Radio broadcasting apparatus without the use of a microphone or any sort of a pickup de- vice ordinarily used. Value of Device The feat of recording the speech of a person in a distant city is believed to have introduced an entirely new element in Radio broadcasting — the possibility of making a master record and then broad- casting it days or weeks later from any Radio station in the country. The reality of the characteristics of the reproduced and broadcast voices was evinced by thousands of complimentary letters received by WGY from fans who praised the feat. The following is to WGY from W. C. Crews, who listened in on a single tube, non-regenerating set, 500 miles away from Schnectady, N. Y. : "Calvin Coolidge, Weeks and Denby came in just grand, almost as though they were in the next room — sounded as though it was the real thing. Had you not said something about Photophone I never would have known the difference. To me it seemed marvelous. "I am sure thousands of fans through- out the country would be interested in knowing the outcome of the experiment, as it related to Europe as well as know- ing something in detail about the Photo- phone, and it is suggested that when re- sults are definitely known that they be given to RADIO DIGEST for a story." Give Set to Wounded Vets SPRINGFIELD, O. — Mrs. Albert A. Wright, of this city, is the chairman of a committee of the Woman's Auxiliary of the Springfield American Legion, which on Christmas Day presented a complete Radio receiving set to the wounded world w?" veterans of Ward 27 at the Nation?^ * diers' Home in Dayton. The ward are those suffering fnr shell shock and woun/1 -■»" overseas, RADIO DIGEST ILLUSTRATED SERVICE OF BRITISH RANKS BELOW U. S. ENGLAND TRIES NEW PLAN IN LICENSING Canadian Radio Official Declares Amer- ican Standards Are Models in Britain OTTAWA, CAN.— Lieut. Com. C. P. Ed- wards, director of Radio in the depart- ment of marine at Ottawa, Ontario, has just arrived back from a visit to Great Britain, where he went as technical ad- visor to the Hon. Ernest Lapointe, minis- ter of marine, in connection with the imperial Radio scheme. Interviewed by a representative of RADIO DIGEST, Commander Edwards de- clined to make any statement about the imperial Radio project until Mr. Lapointe returns. The matter was still under dis- cussion when Mr. Edwards left and conse- quently he has no knowledge of the deci- sion finally reached. Consents to Cross-Exaniinatoin He consented, however, to undergo a cross-examination at the hands of RADIO DIGEST on the subject of Radio develop- ment in Great Britain. "What actual progress," he was asked, "is broadcasting making in the British Isles?" "The first broadcasting station was opened while I was there," replied Com- mander Edwards. "An entirely different scheme from ours and that in the United States is being followed. In Britain the principle of granting licenses to different people has been rejected. Licenses are granted to a specially established broad- casting company which is authorized to establish stations in each territorial area until the whole ©f the British Isles is covered. Seven or eight stations are con- templated, London, Birmingham and Man: Chester being among the centers chosen for the location. Britain Not Up on Quality "In the matter of quality of transmis- sion and also in the matter of programs the British stations have not yet achieved the high standards attained by the first- class stations in the United States. They would appear to be about where your sta- tions were twelve months ago, but there is little doubt that when they enjoy the same experience in broadcasting as the stations in America and Canada they will approxi- mate to the same standards." Hold American Standards as Models • "Is public interest in Radio keen?" he ■was asked. "Decidedly so, and it is growing by leaps and bounds every day. The Prince of Wales, for instance, has already spoken via the London station several times." "What reputation does the stations in the United States enjoy in Great Britain?" asked the RADIO DIGEST representative. "I was surprised and delighted to find the reputation for reliability and accuracy held by the American direction finding sta- tions stood very high." In fact, they are regarded more or less as models whose standards should be emulated as far as possible." Official Books Give Data on Simple Sets Uncle Sam's Circulars Describe Crystal and Electron Outfits WASHINGTON. — To meet the great pop- ular interest in the use of Radio receiving apparatus, the Bureau of Standards is publishing a series of circulars 'descrip- tive of simple receiving sets. The first two of this series are Bureau of Stand- ards Circulars 120 and 121. These two circulars describe the receiving sets which use crystal detectors. The third paper of this series is Bureau of Standards Circular 133. This circu- lar is a description of an electron tube detector and gives instructions for its operation. A receiving set employing an electron tube detector is more sensitive than a set employing a crystal detector and may be expected to give more satis- factory results. The tuning devices, an- tenna, lightning switch, ground connec- tion, and telephone receivers with which this electron tube detector is used may be those previously described in Circu- lars 120 and 121. This paper describes in detail the vari- ous parts which constitute the electron tube detector unit and gives illustrations showing the arrangement of these parts in the complete assembled unit. Detailed instructions for operating this set are also given. WGI Studio Gets Organ MEDFORD HILLSIDE, MASS.— A motor-driven reed organ has been in- stalled in the Station WGI studio in a specially prepared room, and regular ->n recitals by the best organists in *-v will be given frequently. The -^cially built for the Amrad !£5ts of two manuals, - stops. Book Reviews Home Radio— How to Make It. By A. Hyatt Verrill. This book is particularly adapted for the amateur that desires to know how to make Radiophones. Twelve full page illustrations and diagrams. Price, 75c. Radio Experimenter's Hand Book. By M. B. Sleeper. This book will help in the selection and the construction of simple apparatus for transmission and reception of Radio telegraph and telephone signals. Price, $1.00. Elements of Radio Telephony. By Wil- liam C. Ballard, Jr., M. E. A reliable, au- thoritative discussion, in simple form, of the essential principles of Radio telephony and their application. The use of math- ematics has been almost entirely avoided. Price, $1.50. Radio for the Amateur. By A. H. Packer and R. R. Haugh. The underlying prin- ciples of Radio thoroughly explained in simple language and understandable il- lustrations. This book will teach you how to construct and operate a receiving set successfully. Price, $1.50. The Radio Amateur's Handbook. By A. Frederick Collins. A new revised edition of this book is just out. It is complete, authentic, and informative work on Radio. Fully illustrated. Price, $1.50. Radio Receivers for Beginners. By Snod- grass and Gamp. Answers the universal question, "How can I receive Radio?" Price, $1.00. Radio First Aid. Illustrated with work- ing drawings and complete data as to the necessary equipment and cost of con- structing from the simplest to the most modern Radio outfits at home. Price, $1. How to Retail Radio. A new book tell- ing of tested plans and methods and policies for the dealer in Radio. Financ- ing, location, store equipment and arrange- ment. Price, $2.00. Radio Reception. By Harry J. Marx, Technical Editor Radio Digest Illustrated, and Adrian "Van Huffiing. A simple trea- tise on Radio reception. Beginning with the elementary principles of electricity, it carries the reader on into the essentials of Radio telephony. The most successful methods of Radio reception are explained and special reference given to practical tuning. 230 pages, with 130 illustrations. Price, $2.00. The booh department of the Radio Di- gest is prepared to send yon any of the books on Radio published, whether listed in onr Book Review or not. Let us know what book you want, send us your check and we will see that the book is mailed to you. Postage stamps in payment for books not accepted. Send money order or check. Book Department, Radio Digest Illustrated, 123 W. Madison St., 'Chicago, 111. "SANTA" NOTES IN AIR BRING CHEER TO KIDS Goodfellows, Hearing Youngsters' Letters, Lend Hand MEDFORD HILLSIDE, MASS. — Tan- gible evidence that the Santa Claus letters read over the Radiophone from Station WGI made a hit, not only with old Santa but with other Radiophans who listened in, is shown in several cases that came to the attention of the Amrad Station management. One letter from four little children of Italian parentage to Santa, sent to WGI and broadcast, asked Santa for a "good reading book and some games, with a choo-choo train for little brother and a sleeping Mama doll for little sister, because there would be no Christmas at their house, since papa had had to spend all his savings for big sister's funeral." Within five minutes after this letter was broadcast, a representative of the Somerville, Mass., lodge of Elks telephoned for confirmation of the name and address so that they might help the unlucky youngsters with a Christmas dinner. A second telephone message came from a Cambridge business man who wanted to see that Santa brought them a basket of toys and playthings. Over 1,000 letters to Santa Claus were received by WGI and broadcast. Fraternities Have "Nights" MEDFORD, MASS.— The first of a series of fraternity and club nights was held at Station WGI recently, when the Boston Masonic Club had a night, with a special program under the direction of Pres. W. L. Terhune of the club. A card was recently received at Schenec- tady, N. T., from Mauli, Hawaii, saying that signals from WGT had been clear. "ALL-AMERICAN" Amplifying Transformers Two years of successful use all over the world guarantees permanent satisfaction. Kaaio ana Audio Frequency. SEND FOR CIRCULARS RAULAND MANUFACTURING CO. 35 South Dearborn Street Chicago RECEIVING RECORDS? SEND 'EM IN— IN the last issue of RADIO DIGEST the complete, verified list of receiving records to date was published. During the week, the following new and supersed- ing records were made. In order to inform new readers, the rules of the contest can be found in the last issue. The complete list of records, revised and with rules, will appear in the February 10 issue. Station — Miles Away — Holder and Location CFAC — 1650, R. A. Deger, Dayton, O. CFCN — 1650, H. R. Wunder, Cheviot, O. CJCG — 1375, D. J. Morris, Weir, Tex. CKCK — 1450, D. J. Morris, Weir, Tex. KDYW — 1025, C. B. Martin, Springfield, S. D. KDZF — 1850, C. H. Nolder, Cincinnati, O. KFAP — 1950, A. M. Tobias, East Orange, N. J. KFBD— 1375, W. M. K. Young, Kansas City, Mo. KFCF— 1300, R. Talbott, Grinnell, la. KFCK — 1100, R. A. Deger, Cheviot, O. KFDB — 2025, H. R. Wunder, Cheviot, O. KFDF — 1150, H. R. Wunder, Cheviot, O. KFV — 1125, C. B. Martin, Springfield, S. D. KJJ — 1325, C. B. Martin, Springfield, S. D. KJR — 1500, W. M. K. Young, Kansas City, Mo. KNI — 2075, R. A. Deger, Dayton, O. KON — 1900, F. Brinnon, Urbana, O. KOP — 1175, D. J. Morris, Weir, Tex. KPO — 1400, L. Snider, Sioux Falls, S. D. KSD — 1700, N. E. Parr, Albany, Ore. NOF — 1100, C. B. Martin, Springfield, S. D. WCAH — 1075, D. J. Morris, Weir, Tex. WCAY — 1050, D. J. Morris, Weir, Tex. WCN — 1200, W. M. K. Young, Kansas City, Mo. WDAJ — 2175, G. L. Harms, Portland, Ore. WDAR — 1175, C. B. Martin, Springfield, S. D. WEAF — 2450, N. E. Parr, Albany. Ore. WFO — 1000, D. J. Morris, Weir, Tex. WGAY — 1000, D. J. Morris, Weir, Tex. WGR— 2175, N. E. Parr, Albany, Ore. WIAO — 1050, D. J. Morris, Weir, Tex. WJAD — 1625, G. F. Cory, New Bedford, WJAP— 1200, D. J. Morris, Weir, Tex. WJAZ — 1200, C. B. Martin, Springfield, WMAT— 1500.N. E. Parr, Albany, Ore. "WO A A — 1525, G. F. Cory, New Bedford, WOAC— 1050, D. J. Morris. Weir. Tex. WRL — 1100, W. M. K Young, Kansas City, Mo. $866,000 TO REPAIR NA VY RADIO PLANTS Congress Hears Heating and Light- ing of Station Costs $956,000 in Year WASHINGTON. — Some very interesting facts regarding naval Radio activities have been brought out during recent hear- ings on the naval appropriation bill by Congress. The statement was made dur- ing the hearings that $866,300 was spent during the past year for repairs to worn out parts of Radio stations and that $956,- 000 was spent for heating, light and power in naval Radio stations. There are at present 100 naval Radio stations operat- ing, which is a reduction from last year of 37, of which number 62 are Radio com- pass stations. Answering a question by one of the congressmen, the expert who was on the stand stated that in 1922 the Navy Depart- ment has spent $2,510,421 on Radio ap- paratus, while it is asking for $1,823,255 for next year. The maintenance costs have been reduced, it is said, and they are now lower than they have been for many years. During the course of the hearings, the statement was made that the Navy Department is allowing commercial concerns to take over such stations as the Navy does not need. In response to a question as to the amount spent in 1922, the expert said that it was roughly $3,000,000, but the Navy Department desires to cut this consider- ably and the request for the appropria- tion was reduced to approximately $150,- 000 per month for 1923. With ship work it is running about $250,000 a month gross for all Radio work. It was said that there has been a great increase in non- commercial traffic. In Canada the Royal Canadian horse artillery has met with great success in its maneuvers by directing artillery fire from an airplane by means of Radio com- munications. IMPROVED REINARTZ CIRCUIT My highly improved circuit brings in all important sta- tions on both coasts and the Mexican border without any distortion or other noises. We dance to music from Atlanta received on one loud Baldwin unit. Build one of these supersensitive sets from my blueprints and specifications. Price 50e or with a perfect and com- plete double wound spidenveb cod $3.00 by mail. No other windings used. Photo of my set on a glass panel with every order. Everything clearly shown. Cheap and easy to build. Easy to operate. S.A.TWITCHELL, 1925 Western Av.. Minneapolis, Minn. Tell Us Your Radio Troubles OUR ADVICE MAY HELP YOU Give full particulars, make of instrument local condi- tions, type and length of aerial. No circular letter propo- sition. Each case is individual. Enclose 25c and addressed stamped envelope to Radio Information Bureau 627 First Avenue North, MINNEAPOLIS. MINNESOTA "SPARK PLUG" HITS ON ALL CYLINDERS CHARITY DOLLARS ROLL IN AS FANS CHUCKLE KFC Announcer with Novel Scheme and Bits of Comedy Swells Fund for Poor By A. M. Ottenheimer SEATTLE, WASH.— A new phase of Radio broadcasting presents itself almost every day, but one of the latest to come to light is of a nature entirely different from any previously revealed. The Seattle Post-Intelligencer, opera- tors of KFC, a 100-watt station, during the Christmas season every year conducts a campaign for funds for the needy of Seattle. This year, however, Radio, through KFC, was put in use and when the drive was finished, the Seattle station had the assistance of a station in San Francisco, one in Calgary and another in Denver. The announcer at KFC, who has dubbed himself "Spark Plug," devised a system whereby the dollars literally rolled into the fund. He explained that for $5, which was to be turned into the fund, KFC would play any record requested. Each request was acknowledged and the announcer, a man with a keen sense of humor, had fans for hundreds of miles around rocking in laugher at his remarks. A small triangle, which he tinkled upon the receipt of each call, he explained as the clank of the cash register. His re- marks were novel and the affair created much comment. Frisco Plant Joins in Scheme The campaign began early in December and on December 8 the operators at KFDB, the Mercantile Trust Company sta- tion on Telegraph Hill, San Francisco, heard "Spark Plug" explain his plan. The plan was simple: upon the promise of $5 from any auditor, KFC was playing any record requested. The operator at KFC was struck with the idea that he might find some customers in San Francisco. So he called KFDB and offered to play any record for Calif ornians — with the same ?5 poor fund proviso. The idea took instantly. Customers began to come. Then a new phase was added. A Seattle fan would call for a record. KFC would transmit the call to KFDB, and the latter would play the rec- ord. The strength of the San Francisco station made it possible for Seattle con- tributors to the fund actually to dance to San Francisco music. CFCN and XFAF Recruited CFCN, the W. W. Grant Radio, Ltd., station in Calgary, Alberta, Canada, then joined in and the $5 contributions from Canadian listeners were obtained in the same manner. KFAF, the Western Radio Corporation outfit in Denver, Colo., also took part in the performance for one night. KFC made an appeal td President Hard- ing to contribute $10 to the fund. KFDB picked it up and relayed it on. Other sta- tions across the continent relayed it to Washington, D. C, stations. KFDB also broadcasted a call for contributions to every governor in the United States, ask- ing other stations to relay the message on to its proper destination. The triangular conversations between Seattle, Calgary and San Francisco were carried on late at night, the San Fran- cisco station operating under its experi- mental license call of 6XB, but hundreds of Radiophans stayed up late at night just for that purpose. Several hundreds of dollars were "Radioly" raised for the' fund. For the first time in history, airplane races have been reported by Radio. FRESHMAN Variable Grid Leak and Micon Condenser Combined Clarifies Signals, Lowers Fila- ment Current, Increases Battery Life, Eliminates Hissing. Unbroken range — zero to 5 Meg- ohms; all intermediate points. Fixed capacity, .00025 M. F. Price Only $1.00 At your dealers — otherwise send purchase price and you will be sup- plied without further charge. Manufactured by Chas. Freshman Co., Inc. 97 Beekman Street, New York City RADIO DIGEST ILLUSTRATED The Reinartz Set Its Construction and Operation The photo diagram illustrates a Reinartz regenerative receiver designed and built by Benjamin E. Freund in the Radio labora- tory of the Chicago Salvage Stock Store, Radio dealers located in Chicago. The efficiency of this simple regenerative set is surprising to many Radiophans. Un- doubtedly it is one of the most satisfactory receivers. On page thirteen, Harry J. Marx explains how to make and use the set illus- trated here. Turn to Mr. Marx' page and you'll want to make a Reinartz receiver. .0005 Mfd. Plate Condenser Plate Inductance Switch Tuning Inductance Switch X+ *45^ x-* femartz Wou.nd >pider Web Coil 5hoWingiaps Vernier Filament Rheostat .0005 Mfd. Variable Condenser -X- .00025 Mfd. Variable Condenser ■w- .002 Mfd. Phone Condenser -\\ MM RADIO DIGEST ILLUSTRATED Radiophone Broadcasting Stations Corrected Every Week — Part II (NOTE.— The second part of the- schedule list appears below. The first appeared last week and the last part, together with the city-station index will appear next week.) WAAX. Crafton, Pa. Radio Service Corp. WAAY, Youngstown. O. 500 mi. Tohrling Hayner Music Co. Daily ex Sun, 5:30 pm, reports; 8:15-9 pro. music. Eastern. WAAZ. Emporia. Kans. 250 mi. Hollister-Miller Mo- tor Co. Daily ex Sun, 7-8 pm, weather, entertain- ment. Central. WAH. Eldorado. Kans. 4S5 only. The Midland Refin- ing Co. Daily ex Sat. 10:30 am. 1:30 pm, markets, vreatber. Sat, 1 pro, same. Central. WAJT. Marshall. Mo. Kelly-Vawter Jewelry Co. WAJU, Yankton. S. D. Yanktou College. WBAA. W. Lafayette. Ind. 50 mi. Purdue University. Fri. 7:15-7:30 pm, educational lecture. Central. WBAB, Syracuse. N. Y. 1.000 mi. Syracuse Badio Tel. Co. Mon. Wed, Sat, 7:30-9:30 pm. concert, agriograms etc. Eastern. WBAD, Minneapolis, Minn. Sterling Elec. Co. WBAF, Moorestown. N. J. Fred M. Middleton. WBAG, Bridgeport. Pa. 4S5 also. 300 mi. Diamond St. Fibre Co. Daily. 11:45-12 m. markets, weather. Eastern. WBAH. Minneapolis. Minn. 200 mi. The Dayton Co. Daily ex Sun. 1-1:30 pm, 3-3:30. 5-5:30. 9:30-10. Sat. 11-11:30 am. Wed. S-10 pm. Central. WBAJ. Toledo. O. 300 mi. Marshall-Gerken Co. Daily ex Sun. 12:05-2 pm, 6-7:30. news, music, reports. Tiles Thur. Sat, S-9 pm. concert. Eastern. WBAN. Paterson. N. J. 200 mi. Wireless Phone Cor- poration. Daily ex Sun. 9:15-9:45 am, 10:30-11. 1-1:15 pm, 2:15-2:30, 4:30-5:30, music. Sat. morn, only. Eastern. WBAO. Decatur. 111. James Millikin Univ. WBAP, Fort Worth. Texas. 400 and 4S5 only. 1,500 mi. Fort Worth Star Telegram. Daily ex Sun, 9:45- 10 am, 11-11:30 am, 3-3:30 pm, 3:45-4 pm. Daily ex Sat and Sun. 7:15-S pm, 9:30-10:30 pm, news, reports, concerts. Central. WBAQ. Mishawaka, Ind. Lyradion Mfg. Co. WBAU, Hamilton. O. Republican Pub. Co. WBAV, Columbus. O. 500 mi. The Ernor Hopkins Co. Daily ex Sun, 12:30-1 pm. Mon, 7-9 pm. Cen- tral. WBAW, Marietta. O. Marietta College. WBAX, Wilkes-Barre, Pa. 200 mi. John El. Stenger. Jr. Three nights of week, not regular. WBAY. New York. N. Y. 400 only. 1,500 mi. A. T. & T. Co. Daily, 11-12 am, 4:30-5:30 pm. Thurs. 7:30 pm on Eastern daylight saving. WBL, Anthony Kans. 200 mi. T & H Radio Co. Mon. Wed, Fri, 10-11 pm, concert, lecture. Sat, 11-12 pm. concert. Sun, 10 am, 4-5 pm, church service. Central. WBS. Newark. N. J. 100 mi. D. W. May. Inc. Mon, Wed, Thur, 7:30-8:30 pm, reports, music. Sun. 9- 10:30 am, 1-3 pm, church service. Eastern. WBT, Charlotte, N. C. 4S5 also. 500 mi. Southern Radio Corp. Daily ex Sun, 11 am. reports. 8 pm, music. Sun, 7:30 pm, church service. Eastern. WBU, Chicago. HI. City of Chicago. WBZ, Springfield, Mass. 400 only. 500 mi. Westing- bouse Elec. & Mfg. Co. Daily ex Sun, 7:30 pm, children's hour: 7:45, markets, weather, lecture: 8-9, concert. Sun, 3 and 8. church service. Eastern. WCAB, Newburgh, N. Y. 150 mi. Newburgh Daily News. Daily ex Sun, 1 pm, 2, 3, 7. Mon. Fri, 10:30 pm. Eastern. WCAC, Fort Smith, Ark. John Fink Jewelry Co. Tests only. WCAD. Canton. X. Y. 200. 4S0 also. 300 mi. St. Lawrence Univ. No regular schedule. Eastern. WCAE, Pittsburgh, Pa. 400 only. Kaufman & Baer Co. WCAG, New Orleans. La. 200 mi. Clyde R. Randall. Daily ex Sun, 6:45-7 pm, news, time. Thur, 8:30-10 rim, concert. S:m, 2-4 pm music. Central. WCAH. Columbus, O. 150 mi. Entrekin Elec. Co. Tues. Fri. 7-9 pm. music. Wed. Thur, Sat, 7-8 pm, music. Sun, 10-12:30, church service. Central. WCAI, San Antonio, Tex. Southern Equipment Co. WCA1, Univ. Place, Neb. 4S5 also. 100 mi. Neb. Wesleyan. Univ. Daily ex Sun, 11 am. weather. news. Wed, 9 pm, music, lecture. Central. WCAK. Houston, Tex. 100 mi. Alfred P. Daniel. Daily ex Sun, 7-7:15 pm. music. Wed, S-9:15, con- cert. Sun. 3-4:30 pm. concert. Central. WCAU Northfield, Minn. 500 mi. St. Olaf College. Thur, 11 pm, music. Sun, 8:30 pm. music, concert, lecture. Central. WCAM, Yillanova, Pa. Yillanova College. WCAO, Baltimore, Md. 100 mi. Sanders & Stayman Co. Daily ex Sun, 12-12:20 pm, 5-5:20. Mon, Wed. 7:30-S:30 pm. Eastern. WCAP. Decatur. 111. Central Radio Service. WCAQ. Defiance. O. 200 mi. Tri-State Radio Mfg. Co. Daily. 11:30-12:30 pm, 3, baseball: 6-6:30. baseball. concert: 8, special program. Central. WCAR, San Antonio. Tex. 200 mi Alamo Radio Elec. Co. Mon. Thurs, Sat, 8:30-9:30 pm, concert. Sun, 11 am, church service. Central. WCAS. Minneapolis. Minn. 200 mi. Wm. H. Dun- woody Industrial Inst. Mon, 8-8:45 pm. music, lec- tures Central. WCAT, Rapid City, S. D. 485 only. 300 mi. S. D. State School of Mines. Daily ex Sun, 9:30 am, 12:30 m, 3 pm, weather, reports. Mountain. WCAU, Philadelphia, Pa. 485 also. 500 mi. Dur- ham & Company, Inc. Daily ex Sun, 11:30 am, 2:30 pm, 6:30. reports, music. Tues, Fri, 10-12 pm, con- cert. Sun, 2-4 pm, music. Eastern. WCAV. Little Rock, Ark. J. C. Dice Elec. Co. WCAW, Quincy, HI. 200 mi. Quincy Elec. Sup. Co. (Quincy Herald.) Daily ex Sun. 8:45 am. markets: il. markets: 1 pm, markets: 5, music, baseball. Tues, Wed. Thurs, Sat, 8:30-9:45 pm, concert. Sun, 6:30- 7:30 pm, religious. Central. WCAX. Burlington, Vt. Univ. of Vt WCAY. Milwaukee, Wis. 4S5 also. 500 mi. Kesselman- O'Driscoll Music House. Daily ex Sun. 11 am, re- ports. Mon, Tues, Thur, Fri, 8:30-9:30 pm, music. Sun, 7:30-8:30 pm. church services. Central. WCE. Minneapolis, Minn. Findley Elec. Co. WCK, St. Louis. Mo. 50 mi. Stix Baer & Fuller (Grand Leader). Mon, WTed, Fri, 6:45-S pm, concert, lecture, bedtime story. Central. WCM, Austin. Tex. Univ. of Tex. WCN, Worcester. Mass. 485 also. 100 mi. Clark Univ. Daily, 11:15 am. 5:15 pm, weather. Evening program irregular. Eastern. WCX, Detroit, Mich. 400 and 4S5 only. 1.000 mL The Detroit Free Press. Daily ex Sun, 10:35 am, WCX Woman's Club; 2 pm, news; 2:15, stoek reports; 2:50, weather markets; 4:15. markets, music. Daily ex Sat, 8:30-10 pm, week starting Dec. 11 and al- ternate weeks thereafter, concert ; 7-S :30 pm, week starting Dec. 18 and alternate weeks thereafter, con- cert. Sun, 2:30 pm. 4 pm, church services. Central. WD AC, Springfield, HI. Illinois Watch Co. Time and weather, spark only. WDAE, Tampa, .Ma. 485 ^Iso. TOO mi. [Samps Daily ^SimZs. ' Wed, Fri, 8-10 pm, music, lecture. Eastern WDAF. Fansas City. Mo. 400 and 485 only. 500 mi. Kansas City Star. Daily ex Sun, 3-4 pm. reports, music; 6-7, educational, bedtime story, etc. Mon, 0Wed, Fri, 8-10 pm, concert. Sun, 3:30-5:30 pm, t »usic. Central. Il'AG, Amarillo. Tex. J. Laurance Martin. shAH, El Paso, Texas. 485 also. 300 mi. Mine & in elter Supply Co. Daily ex Sun, 10 am. news, re- ■ s. Tues. Thurs, Sat. 7:30-8:30 pm, music. Moun- alSO Syracuse, N. T. 485 also. 200 mi. Hughes Corp. Daily ex Sun, 12 m, reports. Wed. Sat, Z concert. \ollege Park, Ga. 485 also. 300 mi. A & W. ,.-_,... Co. Daily, 9-10 pm. concert etc. Central. M .fc/ L'artford. Conn. 150 mi. Hartford Courant. motor-dtSun. 2:30 pm. 3:30, 4:30, 5:30, music; 7:40. cralld i.'ory; 8:15. concert. Eastern. bidiiea u,onTljie. Fla. 485 also. 250 mi. Florida specially n. Daily. 11 am, time, weather, 3-3:15, ■•HI reci'^- 8-9:3° music. 10:05-10:20 pm. re- ■""-v tv x. Automotive Elec. Co. -U 2.000 mi. Drake Hotel Tues, 4* Dm, 6 pm, 10 pm. dance music. music. Sun, 8:30 pm, 9 pm, WDAQ. Brownsville. Pa. 200 mi. Hartman-Riker Elec. & Mach. Co. Daily ex Sun. 10:30-10:50 am, music; 12:50-1:10 pm. music, news, weather; 5:05-5:30 music. Tues. Thurs. Fri, 9:15-10 pm, concert Sun, 5 pm, chapel. Eastern. VVDAR, Philadelphia. Pa. Lit Bros. WDAS, Worcester. Mass. Samuel A Waite. WDAU, New Bedford. Mass. 500 mi. A H. Smith. Wed, Fri, 7:45-10 pm, music. Sun, 10:30-12 m, 5-6 pm, church services. Eastern. WDAV, Muskogee. Okla. Daily Phoenix. WDAX, Centerville. Iowa. 500 mi. First Nat'l Bank. Daily ex Sun, 11:30 am, reports, news. Mon, Thur, 7:30-9 pm. concert. WDAY, Fargo, N. D. 485 also. 300 mi. Daily ex Sun. 12:15-12:30 pm, 7:30-8:15, reports, news, music. Central. WDM. Washington. D. C. 50 mi. Church of the Cov- enant. Sun, 10:30 am, church service; 3 pm, lecture; 7:30, church service. Eastern. WDT. New York, N. Y. Ship Owners Badio Service. WDV, Omaha, Neb. 100 mi. John O. Yeiser, Jr. Daily 7-8 pm. Tues, Sat. 12-1 am. Fri, 10-10:45 pm. Sun, 2-4 pm. Music. Central. WDY, Roselle Park, N. J. Radio Corp. of America. WDZ, Tuscola. 111. 70 mi. James L. Bush. Daily ex Sun. every half hr.. 8:30 am-12:15, Chicago Board of Trade quotations. Tues, Fri, 7-8 pm, concert, enter- tainment. Central. WEAA, Flint, Mich. Fallain & Lathrop. WEAB, Fort Dodge. Iowa. 4S5 also. 600 mi. Stand- ard Radio Equipment Co. Daily ex Sun, markets every 30 min. from 9:40 am to 12:40 pm, 5:15 pm, 7-S pm, music: 8:15, bedtime story; 9:45, weather. Wed, Sat, 10-11:15 pm, dance music. Sun, 10:30 am, 4:30 pm, 7:30 pm, church services. CentraL WE AC, Terre Haute, Ind. 4S5 also. 75 mi. Baines Electric Service Co. Daily ex Sun, 10:15 am, weather; 12-1 pm, 5-6, music. Central. WEAD. Atwood, Kan. 485 also. 150 mi. N. W. Kansas Radio Supply Co. Daily ex Sun, 11-11:30 am, markets, music; 12, markets; 1:45 pm, markets; on half hour 3:15 to 5:45, news sports. Tues, Wed. Thurs. Sat, 7:30-9, cor cert. Sun, 11 am, church service; 3 pm, sacred music; 7:30, church service. Central. WEAE, Blacksburg, Va. Polytechnic Inst. WEAF, New York City, N. Y. 400 only. 1,500 mi. Western Elec. Co. Daily ex Sun, 4:30-5:30 pm. Mon, Wed. Thur, Sat, 7:30-10 pm. Tues, Fri, 7:30-S pm. Eastern. WEAG. Edgewood, R. I. Nichols-Hineline-Bassett Lab. WEAH, Wichita, Kan. 485 also 50O mi. Lander Radio Co. Daily ex Sun, 9:10 am, 10:40. 11:40, 12:30 pm, 1:30, 3:15, reports. Wed, Sat, 8 pm, concert. Every third Sun, S pm, concert. Central. WEAI. Ithaca. N. Y. Cornell Univ. WEAl, Vermillion, S. D. 300 mi. Univ. of S. D. Mon, Wed. Fri, Sat, 7:30 pm, music, lectures. Cen- tral. WEAK. St. Joseph. Mo. 100 mi. Julius B. Aber- crombie. Thur, 8-9:45 pm, concert. Central. WEAM. North Plainfield, X. J. 75 mi. Burough of N. Plainfleld. Daily, 7:30-8 pm, music, police news, etc. Eastern. WEAN, Providence, R. I. 50 mi. The Shepard Co. Daily ex Sun, 3-5 pm. 6-8, music, bedtime stories. Men. Wed, 8-10 pm, concert. Eastern. WEAO, Columbus, Ohio. Ohio State Univ. WEAP, Mubile. Ala. 485 also. 50 mi. Mobile Badio Co. Daily. 4-5 pm. 7-8:55. Central. WEAR. Baltimore. Md. 4S5 also. 200 mi. News & American Pub. Co. Daily ex Sun. 2-2:30 pm, 6:30-7, weather, music, news. Thur, Sat, 7:30-9:30 pm. Eastern. WEAS. Washington, D. C. 200 mi. The Hecht Co. Daily ex Sun, 3-4 pm. Wed, Fri. 7-S pm. Eastern. WEAT, Tampa, Fla. John J. Fogarty. WEAU, Sioux City, la. 50 mi. Davidson Bros. Co. Daily ex Sun, 9 am, 10, 11, 1 pm. reports, Ltws. Mon, Wed, Fri, 8:30 pm, concert. Central. WEAV, Bushville, Nebr. 200 mi. Sheridan Elec. Service Co. Wed, Fri, Sun, 8-9 pm, concert, news, etc. Mountain. WEAW, Anderson, Ind. 25 ml Arrow Radio Lab. Mon, Wed, Fri, 7:30-S:30 pm, concert, news, etc Central. WEAX. Little Rock. Ark. T. J. M. Daly. WEAY. Houston, Tex. Will Horwitz, Jr. WEB, St. Louis, Mo. 800 mi. The Benwood Co., Inc. Daily ex Sun. 9-9:10 am, 12-12:45 pm, 3-4. Wed, 7-9 pm. Central WEH. Tulsa, Okla. (300 S. Main St., Eldorado. Kans.) Midland Refining Co. WEV, Houston. Tex. 485 also. 500 mi. Hurlburt- Still Elec. Co. Daily ex Sun, 10 am, 5:30 pm, weather, roads. Tues, Thur. 8 pm. concert. Central WEW, St. Louis. Mo. 4S5 also. 100 mi. St, Louis Univ. Daily ex Sun, 9 am, 10, 2 pm. reports. Cen- tral. WEY, Wichita, Kan. 485 also. 500 mi. Cosradio Co. (Wichita Beacon.) Daily ex Sun, hourly, 8:40 am- 12:40 pm, stock markets. Daily, 10:45 am and 4:30 pm, weather; S-10 pm, sports, concert, lecture; 10:45 weather. Sun, 8:10 pm. church service, concert. Cen- traL WFAA, Dallas, Texas. 400 and 4S5 only. 1,500 mi. Dallas News and Dallas Journal Daily, 10:15 am, reports; 12:30-1 pm, address; 6:45-7, bedtime story; 8:30-9. music. Tues, Thur, Sat, 11-12 pm, music. Central. WFAB, Syracuse, N. T. 100 mi. C. F. Woese. No definite schedule. WFAC, Superior, Wis. 400 mi. Superior Radio Co. Daily, 7-7:45 pm, news. CentraL WFAD, Salina. Kan. 250 mi. Watson Weldon Motor Supply Co. Daily ex Sun, 8:45 am, 9:45, 10:45 11:45, 1:30 pm, reports. Tues. Thur, Fri, 8 pm, concert. Sun, 11 am, church service; 8 pm, concert. Cen- tral. WFAF, Poughkeepsie, N. T. 200 mi. H. C. Spratley Radio Co. Daily ex Sun, 10-10:30 am, 11:30-11:45. 1:30-2 pm, 4-4:15. Tues, Thurs, Sat, 8:15 pm. fea- ture program. Eastern. WFAG, Waterford, N. Y. 340 only. 300 mi. Radio Engineering Lab. Wed. Sat, 7:45-10 pm, concert. Sun, 2-4 pm, church service. Eastern. WFAH, Port Arthur, Tex. Elec. Supply Co. WFAJ, Asheville. N. C. Hi-Grade Wireless Instrument Co. WFAM, St. Cloud, Minn. 485 also. 100 ml. Granite City Elec. Co. Daily ex Sun. 3:30-4:00 pm, markets; 7:30-9, entertainment. Central WFAN, Hutchinson, Minn. 485 also. 500 mi. Hutchin- son Elec. Service Co. Daily ex Sun, I pm, markets etc. Central. WFAQ, Cameron, Mo. Cameron Radio Co. and Mo. Wesleyan College. WFAS, Fort Wayne. Ind. United Radio Corp. WFAT. Sioux Falls, S. Dak. 485 also. 400 ml Argus Leader. Daily ex Sun, 10:15-12:15 pm, 2:15, reports; 7:30 pm. music. Tues, 8-9 pm concert. Central WFAU. Boston, Mass. Edwin C. Lewis. WFAV, Lincoln, Nebr. 485 also. 300 ml Univ. of Nebr. Daily ex Sun, 10:10 am, weather, markets. » Sat, 9:00 pm, concert Central. WFAW, Miami, Fla. Daily Metropolis. WFAY, Independence, Kan. 500 mi. Daniels Radio Supply Co. Daily ex Sun, 12 m, 4 pm, news. Mon, Tues. Wed, 7:30-8 pm, entertainment. Thur, Fri, 7-8:30 pm. Sat. 7-9 pm, music. Sun, 11 am, church services. Central. WFAZ, Charleston. S. C. 400 mi. S. C. Radio Shop. Daily ex Sun, 12 m, reports, news music. Tues, Thur, 8-10 pm. Eastern. WFI, Philadelphia. Penn. 400 and 485 only. 350 mi. Strawbridge & Clothier. Daily ex Sun, 1:16 pm, news; 3:30-4:30, concert: 5:30-6. sports. Mon, Fri, 6:30-7 pm. Radio talk. Wed. Fri, Sat, 7:30-8:30 pm, con- cert. Fri, Sat, (alternate weeks) 7:30 pm, concert at 8:30 pm. Sun, 4 pm, church service. Eastern. WFO. Dayton. O. 4S5 also. 300 ml Rike-Kum!er Co. Daily ex Sun. 9 am, 11. 4 pm, music, news, re- ports. Mon, Wed. Fri, 8 pm, concert. Sat, 11:30 pm. concert. Central WGAB, Houston, Tex. 250 mi. QRV Radio Co. Daily ex Sun, 8:30-9 am, police reports; 1:30-2:30 pm, concert, agriograms; 4-5, concerts, police reports. Central. WGAD, Ensenada, Porto Rico. 250 mi. Escuela His- pano Americana de Radio Telegrafia, Inc. Sat and Sun eve. WGAH, New Haven, Conn. New Haven Elec. Co. WGAJ, Shenandoah. la. 100 ml W. H. Gass. Mon, Thur, 7:30-S pm. Central. WGAK. Macon. Ga. Macon Elec. Co. WGAL. Lancaster, Pa. 35 mi. Lancaster Elec. Sup- ply & Construction Co. Mon, Wed. Fri, 7-8 pm, concert, lecture. Sun, 3-3:30 pm, church service. Eastern. WGAM. Orangeburg, S. C. 150 mi. Orangeburg Radio Equipment Co. Daily ex Sun. 10 am. markets, weather; 11:55, time: 4 pm. Radio talk, markets, baseball; 6, music, lecture: 10, time, weather, en- tertainment. Sun, 11 am. church service; 11:55, time; 10 pm. time, weather, music. Eastern. WGAN, Pensacola, Fla. Cecil E. Lloyd. WGAQ, Shreveport, La. 500 mi. Glenwood Radio Corp. Daily ex Sun, 8 pm, music. Sun, 11 am, 7:30 pm, church service. Central. WGAR, Fort Smith. Ark. Southwest American. WGAS, Chicago. HI 1,000 mi. Ray-di-co Organiza- tion, Inc. Daily ex Sun, 9-9:20 am, 11:15-11:30. 1:30-1:45 pm, 2:45-3, 5-6, music. 12:15-12:30 pm, 4-4:15, 4:30-4:45, reports. Wed, Fri, 10-11 pm, music. Central. WGAT, Lincoln. Nebr. 100 mL Am Legion, Dent, of Nebr. Mon, Wed, 9 pm, announcements. Fri, 9-10 pm, patriotic program, concert. Sun, 3-5 pm, sermon. Central. WGAU, Wooster, O. Marcus G. Limb. WGAW, Altoona, Pa. Emest C. Albright. WGAX, Washington C. H., O. 75 ml Badio Elec. Co. Daily ex Sun, 9 am, 2 pm, music, news. Mon, Wed, Fri, 9:30 pm, concert, news. Sun, 10:30 pm, sermon. Central WGAY, Madison, Wis. 100 mi. North Western Radio Co. Daily ex Sun, 9-10 am, financial news; 11:30, news, opening markets; 4 pm, news, closing markets. Mon, Wed, Thurs, Sat, 7:30-8:30 pm, concert. Sun, 10:30-12 am, sermon. Central WGAZ, South Bend, Ind. 200 ml South Bend Tribune. Daily ex Sun, 9-9:30 am, household bints, menus; 2-3 pm, music, 7-8 pm, music Central. WGF, Des Moines, Iowa. 485 also. 300 ml Register and Tribune. Tues, Fri, 7:30 pm, entertainment. Sun, 5 pm, church service. Central. WGI, Medford Hillside, Mass. 4S5 also. 200 mi. Am. Radio and Research Corp. Daily ex Sun, 7 am, set- ting up exercises; 9:30. 11:30, 3:25 pm, music; 10:31 am, 1:30 pm, 3, 6. 6:30, reports, news. Mon, Wed, 7 pm, entertainment. Tues, 8:30 pm, fashion talks, concert. Thur, Fri, 9 pm. concert. Sat, S pm, con- cert. Sun, 4 pm, concert; 6:30 pm, reports; 7:30, church service: 8:30 concert. Eastern. WGL, Philadelphia. Pa. 2,000 mi. Thos. F. J. How- lett Tues, Thurs, Sat, 7:15-11:30 pm, concert. Eastern. WGM, Atlanta, Ga. ' 400 only. Atlanta Constitution. WGR, Buffalo, N. T. 485 also. 300 mi. Federal Tel. 6 Telg. Co. Daily ex Sat and Sun, 12:15 pm. weather, agriograms; 2, music; 3, lecture; 4 music; 5:30, reports; 7:30, bedtime stories; S:10, concert. Eastern. WGV, New Orleans. La. Interstate Elec Co. WGY, Schenectady, N. Y. 400 and 4S5 only, 1,000 mi. General Elec. Co. Daily ex Sun, 11:55 am, 12:30 pm, 6, 10, reports, time, sports. Mon, Tues, Thur, Fri, 2-2:30 pm, 7:45, concert Fri, 10:30 pm, special. Sun, 10:30 am, 4:30 pm, church service. Eastern. WHA, Madison. Wis. 485 also. 600 mi. Univ. of Wis. Daily ex Sun, 12:30-1 pm. weather, markets. Tues, Thurs, Fri. Sat, 12-1 pm, weather, markets, time. Tues, 8-9 pm, concert. Fri, 8-9:15 pm, news, concert. Sat, 1-1:20 pm. instruction. Central. WHAA, Iowa City, la. 200 mi. State Univ. of la. Daily ex Sun. 8-8:30 pm, lecture, concert, sports, news. Sun, 10:45-12 am. church service. Central. WHAB, Galveston, Tex. 300. 4S5, 600 also. 500 mi. Clark W. Thompson Co. Daily ex Sun, 9:45-10:15 -am, 3 pm, 5 pm, reports, music, news. Mon, Wed, Fri, 8 pm, entertainment Sun, 10 am, church serv- ice. Central. WHAC, Waterloo, la. 150 mi. Cole Bros. Elec. Co. Daily ex Sun, 6:15 pm, news, sports. Mon, Wed, Fri. 9:30 pm, concert. Central. WHAD, Milwaukee. Wis. 485 also. 100 mi. Mar- quette Univ. Daily ex Sun, 10:58 am, time; 11:20, weather. Wed, 7:30-8:30 pm, music, entertainment. Central. WHAE, Sioux City, la. 200 mi. Automotive Elec. Service Co. Daily ex Sun, 12:30-5:30 pm, music, reports. Thur. 7 :30 pm, music. Central. WHAF, Pittsburgh. Pa. 200 mi. Radio Elec. Co. Daily ex Sun, 11:30-12 m, 3-3:30 pm, music, news, Sun, 9-10, music. Eastern. WHAG, Cincinnati, O. 100 ml Univ. of Cincinnati. No definite schedule. WHAH. Joplin. Mo. John T. Griffin. WHAI, Davenport, la. 30 mi. Radio Equip. & Mfg. Co. Daily ex Sat and Sun, 2-2:30 pm. 4:30-5-30. 10-11. Sat. 10-11 am. 2-2- :30 pm, 5-5:30. 11-11:30. Central. WHAK, Clarksburg, W. Va. Roberts Hdwe. Co. 50 mi. No definite schedule. WHAI, Lansing. Mich. 200 mi. The Capital News. Daily ex Sun. 9:15-9:45 am. 12:30-1 pm, 3:45-4:15. 7:30-8:30. Sun. 2:30 pm. Central WHAM, Rochester, N. T. Univ. of Rochester. WHAO. Savannah. Ga. 100 ml Frederick A Hill. Daily, 9:30-10 pm. Eastern. WHAP, Decatur. Ill 100 mi. Dewey L. Otta, No definite schedule. WHAQ, Washington, D. C. 75 mi. Semmes Motor Co. Mon, 7-8 pm, lecture on automobile upkeep, music. Eastern. WHAR, Atlantic City, N. J. Paramount Radio & Elec. Co. WHAS, Louisville, Ky. 485 also, 1,500 ml Courier Journal and Louisville Times Co. Daily ex Sun. 4-5 pm, 7:30-9. Sun, 9 :57-10 :45 am, 4-5 pm, church service. Central WHAV. Wilmington, Del 200 ml Wilmington Elec. Spec. Co. Daily ex Sun, 12-1 pm, music. Mon, Wed, Fri. 6-8 pm, concert Tues, Thur, Sat, 6-7 pm. music. Eastern. WHAW, Tampa, Fla. 50 mi. Pierce Elec. Co. Daily ex Sat, Sun, 12-1 pm, 4-5, music, agriograms. Sat, 12-1 pm, 8-10, music, entertainment. Eastern. WHAY, Huntington, Ind. 75 mi. Huntington Pub. Co. Daily ex Sun, 12 m. 3 pm. music; 1:30 pm. 6. re- ports, sports. Mon, Wed, Sat, 8 pm, concert. Cen- tral WHAZ, Troy, N. T. 400 only. 500 mi. Rensselaer Polytechnic Inst Mon, 8:15-9:30 pm, music. East- ern. WHB, Kansas City, Mo. 400 and 485 only. 1,000 mi. Sweeney Auto & Tractor School. Daily, 10 am, 3 pm, 5, weather. Daily ex Sun, 2 pm, ladies' hour; 7, bed- time stories. Tues, Thurs, Sun, 8-10 pm. concert. Central WHD, Morgantown. W. Va. 100 mi. W. Va. Univer- sity. Daily. 4-6. 7-7:30, news etc Eastern. WHK. Cleveland. O. 300 mi. Warren R. Cox. Daily ex Sun, 1:30-2 pm, 4-4:30. 6-6:30. Tues, Thur, Sun, 8-9:30 pm. Concert Eastern. WHN. Ridgewood. N. Y. Times Printing & Pub. Co. WHX, Des Moines, Iowa, 50 ml Iowa Radio Corp. Daily, 12:30-1 pm, 6-6:30. Sat, 3 pm, sports. Cen- tral. WIAB, Rockford, HI. 50 mi. Joslyn Automobile Co. Tues. Fri, 8:30-9:30 pm, music. Central WIAC, Galveston, Tex. 485 also. 200 mi. Galveston Tribune. Daily ei Sun, 12:35 pm, reports. Tues, Sat. evening concert Central WIAD, Ocean City, N. J. 200 mi. Ocean City Yacht Club. Fri, Sat, Sun, 8-12 pm. Eastern. WIAE, Vinton, la. 75 ml Zimmerman Radio Co. Tues, Thurs, Sat. 9 pm. music, news. Wed, 8 pm, band concert. Sun, 2:30 pm. music. Central. W!AF, New Orleans, La. 300 mi. Nola Radio Co. Sun, 10-11 am, music, lecture. Central. WIAH, Newton, la. 200 ml Continental Radio & Mfg. Co. Daily 12:30-1 pm, music, news. Mon, 7:30- 8 pm. Central _ WIAI, Springfield. Mo. 100 mi. Heer Stores Co. Dally ex Sun. 10:30-11, reports, news. Tues, Thur, Sat. 7:30-8:30 pm, music. Central. WIAJ, Neenab, Wise. Fox River Valley Badio Supply W I AK, Omaha, Neb. 485 also. 300 mi. Daily Journal- Stockman. Daily ex Sun, 7:45 am, 9:10, 10:15. 12 m 1:50 r>m. 3:50, markets, weather. Central. WIAO. Milwaukee, Wis. 200 also. 100 mi. School of Encineering. Mon. Tues. Thur. Fri, 10:15-10:80 am; 11:30-11 45, news; 11:45-12:10 pm, lecture: 5-6 pm, news: 7-7:15, music; 7:15-7:30, lecture. Cen- tral WIAQ, Marion. Ind. Chronicle Pub. Co. WIAR, Paducah, Ky. 150 mi. J. A Rudy & Sons. Daily ex Sun, 11-12 am. markets, weather, news, music: 4-5 pm, same and sports; 7:30-9, concert, lec- tures, etc. Sun, 11-12 am, church service. Central. WIAS, Burlington. la. 400 ml Hawk-Eye Home Elec. Co. Tues. Thurs, 8-9 pm, concert. Central WIAT, Tarkio, Mo. Leon T. Noel. WIAU, Le Mars, la. Am. Trust & Savings Bank. WIAV, Binghampton, N. Y. N. Y. Radio Lab. WIAW, Saginaw, Mich, Saginaw Badio & Elec. Co. WIAX, Lincoln, Neb. 200 mi. Capital Radio Co. Thur, S pm, music, entertainment Sun, 2:30 pm, 8, 9, church service. Central W1AY, Washington, D. C. 200 ml Woodward & Lothrop. Daily ex Sun, 10:30-11:30 am, 2-3 pm. music. Sat, S-10 pm, concert Eastern. WIAZ, Miami, Fla. Flagler St, Elec. Supply Sales Co. WIK. McKeesport, Pa. BOO mi. K. & L. Elec. Co. Daily ex Sun, 6:30-7 pm. Tues, Thurs. 9:30-10:30 pm. Sun. 1:30-2:30 pm and 6:30-7 pm. Eastern. WIL, Washington. D. C. 100 ml Continental Elec. Supply Co. Daily 5:30-7 pm., music, entertainment. Eastern. WIP, Philadelphia, Pa. 400 and 485 only. 1,000 mi. Gimbel Bros. Daily ex Sun, ^:30-3:30 pm. Mon, Wed, Thur, 7-7:30 pm. Tues, Fri, Sat, 7-12 pm. Sun, am, pm, church service. WIZ, Cincinnati, O. 4S5 also. 200 mi. Cino Radio Mfg. Co. Daily ex Sun, 12 m, 3:30 pm, 7-8, reports, entertainment. Central WIAB, Lincoln, Nebr. 200 ml American Badio Co. Mon, Wed, 8:30-9 pm. Central WJAD, Waco. Tex. 485 also. 500 mi. Jackson's Radio Engmg. Lab. Daily ex Sun. 12:30-1 pm. mar- kets, news, music; 3:30-4, news, music; 6-6:15. sports: 8:45-9:45, concert, news. Sun, 11-12 am, church service; 3:30-4 pm, music; 6-6:15. sports; 8:45-9:45. music. Central WIAE. San Antonio. Tex. 485 also. 500 mi. Texas Radio Syndicate (Evening News). Mon. 9:30-10:30 pm. Tues, Thurs, Sat, 7:30-S:30 pm, concert. Cen- tral WJAF, Muncie, Ind. 100 mi. Muncie Press and Smith Elec. Co. Daily ex Sun, 3:30-4 pm. Mon, Wed, Fri, 7-8 pm. Sat, 6-7 pm. Central. W1AG, Norfolk. Neb. 4S5 also. 150 mi. Norfolk Daily News. Daily ex Sun, 10:30 am, 12:15 pm, 3:30, 5:30, reports. Central WJAJ, Dayton. O. Y. M C A WJAK, Stockdale, O. 4S5 also. 250 mi. White Badio Lab. Daily ex Sun, 10:30-10:50 am, music; 11:05- 11:20, reports, news; 6-6:30, music, news. Wed, 8-9 pm, concert. Sun, 2-2:45 pm, church service. Central. WJAL, Portland. Me. Victor Radio Corp. WJAM, Cedar Rapids.Ia. 50 mi. D. M. Perham. Mon, Wed, Fri, 7-S pm, music. Central. WJAN, Peoria, 111. 300 mi. Peoria Star and Peoria Radio Sales Co. Daily ex Sun. 11:30 am. markets, weather; 1:30 pm, closing markets, agriograms, bond news; 6:15. sports. Tues, Thurs. Sat, 9:15-9:45 pm, concert. Central. WJAP, Duluth. Minn. 200 mi. KeUey Duluth Co. Mon, Thur, 8-9:30 pm, music. Sun, 11-12 m, pipe organ, 12-1 pm, church service. WIAQ, Topeka, Kans. Capper Publications. WIAR, Providence, R. I. The Outlet Co. WIAS, Pittsburgh, Pa. 150 mi. Pittsburgh Badio Supply House (Pittsburgh Leader). Daily ex Sun 11-11:30 am. 2:30-3 pm. Mon, Tues, Fri, 7-8 pm. Eastern. WJAT, Marshall. Mo. 100 mi. Kelley-Vawter Jewelry Co. Daily ex Sun, 2-2:30 pm, 5:35-6, concert. Cen- tral WIAX, Cleveland, O. 485 also. 500 mi. Uruon Trust Co. Daily ex Sat pm. Sun, 9-9:45 am, 10-10:45, 2-2:45 pm, 3-3:45, music, financial reports, news. Eastern. WIAZ, Chicago, 111 Chicago Radio Lab. WJO, Granville. O. 25 mi. Denison Univ. Tues, Thur, 5-6 pm. educational lectures. Sun, 5-6 pm, religious stories. Central. WJH, Washington, D. C. 100 mi. White & Boyer Co. Daily ex Sun, 1-2 pm, music. Tues, 7:45-10 pm, music. Eastern. WJK. Toledo, O. 300 mi. Service Radio Equipment Co. Daily ex Sun, 2-3 pm, reports. Mon, Wed, Fri. 7:30-9 pm, concert. Sat, 2-5 pm. sports, news. Sun 11-12:30 pm, 7:30-S:30, church services. Eastern. W1X. New York, N. Y. De Forest Radio Telephone & Telegraph Co. WIZ, Newark, N. J. 1,500 mi. Westinghouse Elec & Mfg. Co. Daily ex Sun, 15 minutes hourly from 9 am to 6 pm; 12-12:30 pm; 7-10:15 pm. Miscellaneous program of highly varied nature. Sun, 3-l(r:15 pm, music. Eastern. WKAA Cedar Rapids. la. 200. 485 also. 200 mi. H F. Paar. Daily ex Sun, 12:45 pm, reports; 5:30, re- ports, agriograms; 6-7, music. Thur, 11-12 pm, music. Sun, 4-5 pm, church service. Central. WKAC, Lincoln, Neb. 400 mi. Star Pub. Co. Tues, Fri, S-9:30 pm, concert, entertainment. Central WKAD, East Providence, R. I. Charles Looff. ,W!5AE' Wichita Falls, Tex. W. S. Radio Supply Co. WKAG, Louisville, Ky. Edwin T. Bruce. WKAH, West Palm Beach, Fla. Planet Radio Co. WKAK, Okemah, Okla. Okfuskee Countv News. WKAL, Orange, Tex. Gray & Gray. WKAN, Montgomery, Ala. 200 mi. Alabama Radio Mfg. Co. Daily ex Sun, 3:30 pm. 8:30, music, news. Eastern. WKAP, Granston. B. I. Wilcox Flint WKAQ, San Juan, Porto Rico. Badio Corp. of Porto Rico. WKAR. East Lansing, Mich. Mich. AgrL College. WKAS. Springfield, Mo. 100 ml L. E. Lines Music Co. Daily ex Sun, 6:30-7 pm, sports. Mon, Fri, Sat. 8-9:15 pm, music. Central. WKAV, Laconia, N. H. Laconia Radio Club WKAW, Beloit, Wis. 100 mi. L. M. Turner. Daily 12-12:15 pm. 7-7:30, concert. Central. WKAX, Bridgeport, Conn. 75 mi. Wm. A Macfarlane WKAY, Gainesville, Ga, Brenau College. WKAZ, Wilkes-Barre. Pa. 100 mi. Landau's Music Co. No definite schedule. Sat, 8-12 pm, dance music .. §,HP' u am' s pm- church service. Eastern. WKC, Baltimore, Md. 500 ml Jos. M Zamoiski Co Tues, Thurs, Sat, 7:30-9:30 pm. Eastern, daylight saving. WKN, Memphis, Tenn. Riechman-Crosby Co. WKY. Oklahoma City, Okla. 485 also. 500 ml Okla- homa Radio Shop. (Daily Oklahoman.) Daily. 12 m. weather; 7-7:30 pm, sports, specials; S:30-9:30. con- cert; 9, weather, news. Sun, 3:30-4:30 pm, concert. Central. WL2. Fairfield, O. U. S. Armv. WIAC, Raleigh, N. C. N. C. State College. W1AF, Lincoln, Neb. Johnson Radio Co. W1AG, Minneapolis, Minn. 400 and 4S5 only. 1 000 mi. Cutting & Wash. Radio Corp. Daily ex Sun, 9:30-12 am, music, market reports; 1:30-3 pm, music, farm news, styles; 3:30-4:45, markets, music; 6-7:30, farm news, children's hour. Thur, Fri, Sat, 8-9 -3t pm, concert. Sun, 4:30-5:30 pm, church services. Central. WIAH, Syracuse. N. Y. Samuel Woodworth. W1A1, Waco. Tex. 485 also. 1.000 mi. Waco Elec Supply Co. Daily ex Sun. 9:30 am. 10:30. 2:30 pm" music, reports. Tues. Thur. Sat. 7:45-8:45 pm. music. Sun, 3 pm, church service. WLAK. Bellows Falls. Vt. Vermont Farm Machine Co. W1AL, Tulsa Radio Co. Tulsa. Okla. W1AM, Springfield, O. 100 mi. Morrow Badio Co. Mon, Wed. Fri, S-9:30 pm, dance music Central W1AN, Houlton, Me. Putnam Hdwe. Co. WIAO, Scranton, Pa. 100 mi. 4S5 also. R. C Ehrhardt and J. H. Jones. Mon, Wed, Fri, 7:15 pm, bedtime stories, reports, 8-9:45 pm, music Sun,' 7:30 pm, music; S:30, church services; 9:15, music. Eastern. W1AP, Louisville. Ky. W. V. Jordan. WIAQ. Kalamazoo, Mich. 100 mi. A. E. Schilling Daily, 10-12 pm, music. Central WIAR, Marshalltown. la. 50 mi. Meikel Music Co. No definite schedule. (The third and last part of the station schedules will appear next week. With this will appear the city- statiou index.) RADIO DIGEST ILLUSTRATED PLANT OWNERS IN BETTERMENT GROUP ORGANIZE TO IMPROVE BROADCAST SITUATION Washington Station Proprietors Send "Feelers" to Learn Public Wants in Radio Entertainment WASHINGTON. — Definite action which may insure the permanent improvement of the Radio broadcasting situation in the District of Columbia was taken when own- ers and representatives of all broadcast- ing stations here met at the City Club as guests of Harold H. Levi, general mana- ger of the Hecht Company, owners of Station WBAS, and formed the Radio Broadcasters' Association of Washington. The membership includes representa- tives of concerns operating broadcasting stations in the District of Columbia only. C. O. Fisher, manager of the Radio depart- ment of Woodward & Lothrop, was unani- mously elected president. A committee was appointed to prepare and arrange publicity for a questionnaire to determine the wishes of the public concerning the nature of Radio entertainment desired. The most important action taken was im- proving the arrangement of broadcasting schedules. To Study Public Bemand Mr. Levi urged those present to co-oper- ate, organize and make a study of the public demand for Radio entertainment. C. O. Fischer and Chief Radio Inspector Terrell, who was elected an honorary member of the association, spoke briefly. Mr. Terrell described methods pursued in other communities, particularly New York City, where station operators have made every effort to co-operate for greater efficiency on the part of broadcast- ing stations, and likewise for the greater benefit shared by the public and listeners in. As the object of the session was the furtherance of co-operation between oper- ators of broadcasting stations and the public dependent on the entertainment supplied by these stations, it was decided by all those present to eliminate so far as possible long waits between the announce- ments and the actual broadcasts of selec- tions on Radio programs. Radio to Assist China Missions Phones and Airplanes to Help Work of Methodist Episcopal Church in Orient BOSTON, MASS. — Word has been re- ceived by the Methodist Episcopal mis- sionary department that Radiophones and airplanes are to be used as an aid in car- rying on missionary work of the church in virtually inaccessible parts of China. This announcement is made by the com- mittee on conservation and church ad- vancement, the statement further adding that the decision was reached at a confer- ence of missionaries in Tzechow, West China. Rev. James Maxon Yard, new executive secretary of the centenary, in China, sent the news to Rev. Paul Hutch- inson, editor of the Chinese Advocate, and the latter relayed it by Radio to the com- mittee in America. The Tzechow district is several weeks' journey from Shanghai and the missionaries there can see the mountains of Thibet from their headquar- ters. It lies in one of the wealthiest prov- inces of China, Szechuen, with 60,000,000 inhabitants. The Radiophone and air- plane at present are the only means avail- able for communication and quick trans- portation. KITCHEN, BUSINESS HELPS TO WGI FANS Women's Club Expert Gives Tues- day Cooking Tips — Market News Four Days MEDFORD HILLSIDE, MASS.— Sever- al new features have been added to the broadcasting program of WGI, Amrad station here. In the afternoon on Tues- days, the Amrad Women's Club has an hour, and for a time a series of helpful cooking lessons by Mrs. Christine Freder- ick, director of the Applecroft Efficiency Station, will be given. The first lesson was "The Bride's Own Cooking Primer," a lesson intended for newlyweds. The broadcasting of information of in- terest to business men has proven so popu- lar that the regular program has been enlarged and includes the following: Mondays, at 6 p. m., a weekly review of conditions in the iron and steel industry, prepared by the Iron Trade Review; Tuesdays, at 6 p. m., Babson business re- port, assembled by the Babson Statistical Organization and reviewing the economic situation of the past week; Wednesdays, at the same hour, "News of the Wool Market," prepared by the Commercial Bulletin and arranged so that the layman as well as wool dealers and merchants may be interested; Thursdays, "Weekly Review of the Shoe and Leather Industry," prepared by the New England Shoe and Leather Association, same hour. Radiophone Used to Direct Movie Rex Ingram Controls Crowds in "Prisoner of Zenda" by New Device Predicts Wider Use of Air Waves by Farmers Weather Bureau Chief Sees Steps Beyond Forecasts Stage WASHINGTON. — A great future in- crease in use of Radio by farmers is fore- cast in the report of Dr. C. F. Marvin, chief of the weather bureau, to the Secre- tary of Agriculture. "The great value of Radiophony as a means for disseminating weather fore- casts and warnings to the people already has been demonstrated," Dr. Marvin pointed out. "Its future usefulness can. not be estimated." Extension of telephone lines into rural districts overcame only a part of the diffi culty of giving the farmer the latest weather advice, the report continued. Then came Radio. "Thousands of farm- ers installed such receiving apparatus during the past year, and are now obtain- ing the weather forecasts and warnings which are so important to their operations, as promptly and effectively as the business interests in urban communities," said Dr. Marvin. LOS ANGELES, CALIF. — Radiophony has found new application in the hands of Rex Ingram, director of "The Prisoner of Zenda," in giving commands to the young army of extras in the great corona- tion scenes. It was during the height of the recent Radio popularity that the brilliant young director undertook to transfer to the screen Anthony Hope's celebrated ro- mance, "The Prisoner of Zenda," which was dramatized by Edward Rose. . In the course of making "The Four Horsemen," Mr. Ingram had encountered an obstacle in the control of the thou- sands of actors in the big scenes. He had in that case used a wire telephone with success. But with the advent of the Radiophone, he saw one undeniable supe- riority in the newer instrument; that there need be no switchboard operator to delay the transmission of his direction. Practical use of the Radio idea brought approval from Mr. Ingram. The working out of the scheme was not so complicated as he had anticipated. By placing subdi- rectors to issue orders to every group in the crowds at the coronation scenes, and so arranging the position of these subor- dinates as to hide them from the camera, and equipping them with receiving ap- paratus tuned to the same wave length as the transmitter he used, he was able to direct the entire mass of people with great success and instant response. Radio Carries Coolidge's Voice into Distant Homes WASHINGTON. — Vice President Coo- lidge has received some interesting com- munications in connection with the broadcasting of his talk on Americanism which was sent out by Station WGY at Schenectady, N. Y., on Christmas Eve. A great number of communications have reached the Vice President, including one from Jasper, Ind., Carthage, Mo., Gypsum, Kans., Greensboro, Ala., and other distant places. The communication from Carthage says in part: "Your message was as clear as though you were speaking to us ten feet away." From Gypsum comes the following: "Articulation and modulation were as per- fect here through a loud speaker as though I had been there." From Omaha, Neb.: "This address was received in our home, every word per- fectly audible and very clear, and it al- most fills one with awe at the thought of the great possibilities of the future of the Radio as a servant of the public." Champ Canary Warblers Entertain from Chicago CHICAGO. — Probably the most novel features of any program broadcast by Radio was recently sent out from Station KYW. This entertainment was given in connection with a recent midnight show and consisted of the singing of twelve champion roller canaries. These birds were the prize winners in the Interna- tional Roller Canary contest held at the local Hotel Sherman. Several of the wee yellow warblers have toured the world, and have the distinction of having sung at the Crystal Palace in London before King I George. R-A-D-I-O BUY HERE FOR LESS Radio Supplies purchased here are sold under a positive guarantee of satisfaction. We carry the largest new stock of first quality merchandise. Complete Parts for Reinartz Circuit Includes 17x18 Formica Panel, 1 Bakelite Socket, 1 How- ard Vernier Rheostat, 23 Plate Condenser, 11 Plate Con- denser, 3 Switch Levers, 2 Dozen Switch Points, 1 Reinartz Wound Coil, 1 Variable Grid Leak, 8 Binding Posts, 25 Feet Tinned Wire, 1 Base for Coil, 1 Mounting Base Board, and 1 Diagram to Construct This Set. Complete . $11.45 ORIGINAL TYPE "C" BALDWIN UNITS $4.95 COMPLETE PARTS FOR REGENERATIVE SETS This includes 2 Variometers, 1 Coupler, 3 Dials, 1 Rheostat, 1 Cunningham Detector Tube, 1 Bakelite Socket, 1 Mahogany Cabinet, 7x18 Formica Panel, 6 Binding Posts, 1 Switch Lever, 12 Switch Points, 2 Stops and 1 Diagram to construct this set. Set is <£1 H QC capable of receiving 1,000 miles if installed with outdoor aerial «p J. # •«/** ~~ VARIABLE CONDENSERS $4.30 Value, 43 PLATE, now. $1.75 $3.10 Value, 5 PLATE, now. $1.25 $3.70 Value, 23 PLATE, now. $1.45 $2.70 Value, 3 PLATE, now. $1.15 $3.30 Value, 11 PLATE, now $1.35 AvM-T*. Westen, E|ectric ph()nes> $7#95 Each Phone Cap is covered with large soft rubber ear cushions, and an aviation leather helmet goes with each set! These are the only phones to pass the Government specifica- tions for sensitiveness and loudness, the requirements called for in aircraft reception. U. S. A. 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Spaghetti Tubing yard Cord Tip Plugs Lightning Arresters 2-Slide Tuning «1 QC Coils, at ipi.JWJ 3-Coil Honeycomb Mountings, £?.. $4.20 Phone Caps, for mostly Of. all phones ASM. Signal Corps Hot Wire .*»s» Anti-Capacity Switches Lightning Switches Hydrometers, now at Radiocite Crystal, at $1.50 $2.65 45c 35c FORMICA PANEL J" thick, Square Inch.ljc BLACK OR BROWN WE GUARANTEE ALL MERCHANDISE PURCHASED OF US Mail orders filled same day received BUY HERE FOR LESS CHICAGO SALVAGE STOCK STORE 509 South State Street, Chicago, W 10 RADIO DIGEST ILLUSTRATED Radio Digest ii d TRADE-MARK Published by the Radio Digest Publishing Company, Inc. 123 West Madison Street Telephone State 4844-4845 Chicago, Illinois E. C. RAYNER, Publisher Chas. F. Smisor, Editor Evans E. Plummer, Managing Editor Harry J. Marx, Technical Editor Eastern Representative, Jacob Miller, 2126 Broadway, New York Telephone Columbus 2390 Pacific Coast Representatives E. J. Wood, 251 Kearny St., San Francisco Telephone Kearny 1472 H. M. Morris, 417 Western Mutual Life Building, Los Angeles Telephone 12011 PUBLISHED WEEKLY SUBSCRIPTION RATES Single Copies. 10 Cents Vol. rv Chicago, Saturday, January 13, 1923 No. 1 Radio Brings Cheer First Year's Popularity of the Science RADIO is a great many years older than many re- alize. That is in a strict sense, it has existed rather obscurely for many years. But it was about this time, a year ago, that the Radiophone sprang boldly into the limelight and grew in popularity at a breath- taking pace, until it reached its present status as an institution almost as firmly established as if it had grown steadily for a decade. Eadio, in its recreational phase, has achieved pop- ularity more quickly and more consistently than almost any other thing the American public has ever known. It has come to stay. It is spreading across the world. Conservative estimates have placed at better than a million the number of interested auditors who are equipped with Radio receiving outfits varying from home-made crystal sets, built of scraps, at an outlay of a quarter of a dollar, to magnificent tube sets of values up to a thousand dollars. The number is ex- pected to double during the ensuing year. Radio reaches everywhere. Few barriers prevail against it. It defies time, space and matter. Every day reveals some new phase of its usefulness. Home, hospital, school, hall, store, office and factory are entered and entertained by it. It is too large a thing for the human mind even to conjecture at the ultimate development. Meanwhile, however, the Radio-minded of the na- tion are celebrating a milestone in Radio 's endeavors with mingled awe at its great strides of the past, and wonder as to what it will do in the future. The Radio receiving set is speedily establishing itself as a fixture of the American home, and is as permanent and neces- sary as telephone or baby carriage. Bringing Peoples Close Together Air Communication Results in Removing Barriers IT IS difficult to keep one 's feet on the ground when contemplating the possibilites of Radiophone com- munication. They stagger the imagination. Radio is a utility of great value and like all discoveries and inventions it is causing a revolution in our civilization. Every day sees new opportunities for service along dif- ferent lines of activity. Experimenters are working night and day on im- provements. The greatest development in broadcast ing has been made through the use of the vacuum tube and future possibilities of immense improvement in this one feature are confidently expected. There is one important factor, however, in this re- cent product of the inventive genius so active among our citizens that is fraught with tremendous signifi- cance. That is the effect that it will have on the ages- long struggle of the human race for attaining a perfect system of society. Radio now is and "will become more so, one of the greatest influences along the lines mentioned, for it removes effectively those barriers of time, space and lack of communication, and brings the peoples of the world close together. It will act as a great impetus to the movement to establish an international, or world- wide, language, and play no small part in assisting the race to reach the goal destined for it by a beneficial Providence. Fundamental Definition Lacking What Radio Means to Hundreds of Thousands THE word Radio has as its fundamental definition the means whereby concerts, plays, operas, football scores and the like are brought iuto the individual home with the expenditure of little money and a com- paratively small amount of labor. To a certain extent this is true, but there is now vastly more than that connected with the science itself, has been in the past and will be a hundred times more in the future. Today Radio is the very heart string of the mer- chant marine of the world. It is the safeguard of the tourist and sailor when miles away from home on the "■n Vess expanse of the world's oceans. True, lives "~v ' lost regardless of Radio, yet how many more "" «* fld by the fleetness and magic of the Condensed By DIELECTRIC There are times when a piece of news would never be noticed by us stuck down in a corner somewhere on an inside page of the daily journal. After hearing the announcement from Station DOE of the theft of a large number of five dollar Federal Reserve notes, and their numbers, then we plainly saw the news item to that effect in the paper we had just carefully perused. The trouble in the circuit when such a thing happens to any of us probably lies in our optical bulbs; one of these is directional, the other fixed. One oscillates before the printed page, while the other never leaves the filament rheostat that gentle fingers are persuading to mount ever higher! It is no easy thing to read all the news and at the same time keep ambitious hands from ruining the set. However, speaking of bank notes, I never knew even one of their numbers personally. Will England send its Radio Premier to this country to beseech our aid in co-operating with them in their effort to keep American made sets off the British mar- ket? Receiving sets manufactured in the United States are admittedly superior to theirs, but they must needs develop the industry to themselves. A British broad- casting company has been granted a charter which in- sures that concern at least two years' monopoly in this line. From the American Radio Exposition held in the Grand Central Palace, New York city, many items of general interest were given the listeners in, one of these being a wedding ceremony with two couples participat- ing. It is rather a strange experience to hear the parson proclaim, "I pronounce you man and wife," when neither of the contracting parties are visible to the majority of the invited guests. The most aggravating part of it all, perhaps, is to be unable to contribute the usual rice and old shoes to the newlyweds. Some means will be provided in time whereby we listeners may play a more active part in starting a Radio-married couple on their life journey. For instance, we might shock them. At that same exposition, we heard a speech broadcast by vice-president Griswold, of the American Telegraph and Telephone Company, in which he called our atten- tion to the problems of the future in Radio broadcast- ing. We were advised to consider the necessity of plac- ing this great source of entertainment on a sound busi- ness basis, as considerable sums of money are required to maintain broadcasting stations and to give to the pub- lie what it desired to hear. Then, the following evening, we heard (those of us who were listening to WJZ) a rather, different aspect of the subject. We were told that the expense of broadcasting was to be less the con- cern of the Radio audiences, than that well-organized stations should be supported by public approval made manifest to the ruling authorities. Whom are we to believe? Read column .four, page one, of RADIO DIGEST, of December 23rd issue. Shall we put all our eggs in one basket? Good news for the "silent period" fans! KSD announced two evenings a week when virtually no broadcasting would be done by stations in St. Louis, Mo. Others are learning to keep quiet, though it 's a slow process. Many of you may have heard the music from Station WMAF and not known the identity of the owner of that station. If other men of wealth would do as Col. Edward Green has here done, devote some of their means to the furtherance of the science of Radio, we could advance even more rapidly than is now the case. He has provided an equipment in his laboratory, which is second to none, of such experimental value that im- portant discoveries may be looked for from this source. The appealing feature of it all is that any amateur' may visit the place and, without expense, benefit by whatever he finds of new ideas. This is in marked con- trast to the monopolistic spirit which seems to be per- vading some quarters at the present time. Not that I would suggest hampering the purely business phase of Radiophony, rather, to extend the field of operation beyond the narrow confines of a single corporate inter- est. We will continue to need diversified application to this mammoth industry, if we wish to develop all of its latent possibilities. Like reading a dime novel detective story just before retiring for the night, it is a bit disturbing to hear hold-up descriptions direct from police headquarters. That station in Detroit, Mich., with the well-chosen call letter — KOP — is responsible for my having spent a restless night on a recent occasion. In forboding tones I heard of two cases of highwaymen successfully accom- plishing their nefarious purposes, and could easily vis- ualize the whole exciting drama. Each character was carefully described as to dress, weight and the beautiful finish of his treasured automatic, and in both cases I was informed that these criminals were heading in my direction. With so vast an audience it is quite possible that the leading men were detained before they had gone very far. The incident serves to impress one anew with the utility of Radio broadcasting; not, how- ever, with the need of spending money for blood curdling literature. Music with your meals is possible without the cost of employing an orchestra. Simply tune that station which is transmitting an orchestra concert for your bene- fit at the dinner hour. RADIO INDI-GEST The Grid Choked Up with Tears and Leaked Why did the tube howl? Because an electron passed round the plate, but found not a bite had been put on the grid. Hook the Two in Series Dear Indi — The following was "lamped" in a so- called newspaper "Radio" department. $145 ll-Plate invariable Condenser Please tell me how to hook-up said "invariable" condensers. The same paper also mentioned the use of "negative" B batteries. Do the dealers pay you the price when you purchase a "negative" B battery? — F. W. L. He Usta Be Out Till He Listened "In" Long into the night she sat watching The fire that but feebly burned; The hour of midnight solemly tolled, But yet he had not returned. What could she do to keep him at home, Keep him away from that club? While love springs eternal hope will not die, Traps must be set for that ' ' hub. ' ' But now you'll find him always at home, And proudly to you he '11 own, That he 's never been out since the day She bought him a Radiophone. — Popular Wireless (London.) Even Poems Have Meter Pa: "I see Radio is sent according to meters." Ma: "First it was the gas meter, then the electria. meter, then we get an automobile and Will uses it to meet her every night and now it's Radio wavemeters. " Dancing at Radio Frequency He wondered why "The Blue Danube Waltz" didn't sound just right. Then he found he had plugged in the two-step amplifier. We Like Radio but We Eat First When a Radiophan tells his wife, who is holding sup- per for him, that he wants to listen in just one more minute — he is usually picking a minute half an hour away. Well, You Need a Ground Notatube: "What's in the Radio concert pro- gram?" Whataset: "Concert in A Minor." Notatube: "Probably Massa's in the coaled, coaled ground." Three Cheers for Marconi! LawyeT: "Now, if you will let me have some of his love letters" — Ex-Sweetie (suing for breach of promise): "I haven't any. We both had Radio sets." She Listens in for Him Ida: "I can't afford a Radio receiving set." Angela: "How foolish! What is your hubby's aver- age income?" Ida: "Oh, usually midnight." RADIO DIGEST ILLUSTRATED 11 A. B. C. Lessons for Radio Beginners IN" CHAPTER one we learned about the nature of electricity and about the dif- ferent kinds of electric currents that -ed in modern Radio practice. We also look up the subjects of electrical pressure, current flow, and resistance, and learned that pressure is measured in volts, current flow in amperes, and resistance in ohms. The entire chapter ought to be carefully reviewed before a study of this second chapter is undertaken. In this chapter we will discuss electric circuits and magnetism, two very impor- tant subjects with which everyone should £*S 2U12-Z&. Cell .Q be familiar who wishes to understand the whvs and wherefore"s of Radio operation. The Electric Circuit In order that an electric current can flow, it is necessary to have a complete and uninterrupted conducting path or ring. This unbroken path over which an electric current flows is called an elec- tric circuit. The complete circuit in- cludes three essential parts: First, a source of current flow which may be either a battery or a dynamo; second, the appar- atus in which the energy of the electric current is consumed, and third, the neces- sary connecting wires and switches. In Figure 5 we have illustrated a sim- ple electric circuit consisting of a dry cell as the source of the electric current, a buzzer in which the energy of the cur- rent is consumed, and the connecting wires containing the switch or key K. As long as the key is open, there is a break or gap in the circuit and hence no current can flow: but as soon as the key is closed, the circuit becomes continuous and the dry cell is then able to cause a current to flow and to operate the buzzer. Al- though this is only a simple electric circuit, still its operation is the same as that of a large power circuit in which a large water wheel driven generator is delivering several thousand horsepower by means of a high tension (voltage) transmission line to a distant city. cell St. e rzz! 8 ■IZ, B ' JU £ — Every electric cell, storage battery or dynamo, always has two terminals, one positive and one negative. The positive terminal is the one at which the current leaves the generator and flows to the en- ergy consuming device, while the nega- tive terminal is the one at which the current returns and again enters the gen- erator. The wire conducting the current away from the generator is hence known as the positive side of the line, and the other wire over which the current re- turns is the negative side of the line. Thus, in Figure 5, A is the positive ter- minal of the dry cell and the wire ABC is the positive side of the line, for through it the electric current flows from the cell to the buzzer. The wire DKE is then known as the negative side of the line, for through it the current returns to the cell. Sometimes the earth or ground is used as the negative side of the line for conducting the return current. In Fig- ure 6 we again have a simple buzzer cir- cuit, in which the current leaves the cell at the positive terminal A and flows through the key K to the buzzer at B. The current then leaves the buzzer at C and enters the ground at E, it flows through the ground to G, and then returns to negative terminal of the cell at F. Note carefully how a ground connection is represented. For making a ground con- nection the wire can be connected to a F7C 7 water pipe by means of a special "ground clamp," or else it can be connected to an iron rod or pipe which is driven down into the earth to a depth of sis or eight feet. Ohms law The amount of current (No. of amperes) flowing in a circuit depends upon the applied electrical pressure (volts) and the amount of resistance (ohms) offered by the circuit to the flow of current. The higher the pressure, the more cur- rent will be caused to flow; also with a high resistance the same pressure can cause less current to flow than if the resistance is small. There is an impor- By Arthur G. Mohaupt Chapter II t.int law which combines these three fac- tors. This law is known as Ohm's Law, and states that the number of amperes of current flowing in a circuit is equal to the number of volts pressure divided by the number of ohms resistance. Thus, if a storage battery can exert a pressure of 6 volts, and the resistance of the fila- ment of a vacuum tube is 3 ohms, the number of amperes of current flowing will be equal to 6 divided by 3 or 2 amperes. Since at a given pressure the current flow (No. of amperes) depends upon the resistance of the circuit it is evident that we can control the strength of the current by regulating the amount of re- sistance. A device consisting of a vari- able resistance and used for regulating the current flow in a circuit is called a rheostat. It is always connected in series in a circuit so that it forms a part of the circuit and all the current must flow through it. A rheostat is illustrated at A in Figure 7. The current leaves the storage battery at the positive terminal P, and enters the rheostat at R. The rheostat consists of a number of coils of high resistance 'wire connected between a series of contact points over which the end of a rotating lever moves. In the position in which this lever is in Figure 7, the current must first flow through all of the resistance connected in between A and B before it can flow on through the filament of the tube. Thus by rotating the lever any amount of resistance can be cut in or out of the circuit, and the current correspondingly decreased or in- creased. As the current strength in- creases, the filament of the tube burns brighter, while with a decreased current the filament glows less dim. The amount of current flow (No. of amperes) in a circuit is measured with an instrument known as an ammeter. An ammeter, like a water meter, is always connected "in series" in a circuit so that the entire current to be measured must flow through it. As is illustrated in Figure 7, an ammeter is represented by a circle with the letter A in it. As the current flows through the instrument, the pointer indicates on a scale the num- ber of amperes flowing. The two ter- minals of an ammeter are marked P (positive) and N (negative). TVhen con- necting the instrument into the circuit, the positive terminal must always be connected to the positive side of the line, and the negative terminal to the negative side of the line. Magnetism. Although magnetism is a very broad and interesting subject, we will be able to take up only a few of the important points which are necessary in order to understand the fundamental principles of Radio. We are all familiar with the small horseshoe magnet and have per- rrG.9 formed many interesting experiments with it. A magnet will pick up only small pieces of iron and steel; but no other metals. Hence iron and steel are used so extensively in the construction of electrical apparatus and machinery, for they are the only metals which will carry magnetism or can be magnetized. However, a magnet does not possess its power of attraction over the entire surface, but only at certain places near the ends of the magnet. These spots where the magnetism seems to be con- centrated are called the poles of the mag- net. A magnet always has two poles, one called the north pole and the other the south pole. If we lay a piece of stiff paper over a magnet on a flat surface and then sprinkle iron filings on the paper, these filings will arrange themselves along definite lines as is illustrated in Figure 9. These lines are called magnetic lines of force or merely lines of force, because the magnetic force of the magnet seems to act along these lines. These lines appear to come out of one end of the magnet, the north pole, travel around through the surrounding space, and enter the magnet again at the other end or south pole. The entire col- lection of lines of force is commonly called a magnetic field, or magnetic flux. Whenever an electric current flows through a wire or any other conductor, that conductor is surrounded with a mag- netic field in the form of circular lines of force, all of which have the conductor as a common center. They all become larger as the distance from the conductor increases. Such a circular magnetic field is illustrated in Figure S. The direction in which the magnetic lines of force act around the conductor depends upon the direction in which the electric current flows. If the current is reversed, the lines of force act in the opposite direction around the conductor. The strength of the circular magnetic field, that is, the number of magnetic lines of force, depends upon the strength of the electric current (No. of amperes) — the larger the current, the more lines of force encircle the conductor. We can never have an electric current without also having the magnetic field aronnd it. Such magnetism is known as electro- magnetism. If the strength of the electric current changes, the number of lines of force also change. If the current increases, the lines of force expand around the wire and increase in number; while if the current decreases, the lines of force shrink to- gether and decrease in number. If the cur- rent flow stops altogether, all of the lines of force collapse and disappear within the wire. Since a change in current strength causes a change in the magnetic field around the wire, an alternating or pulsat- ing current which is constantly changing in strength, is surrounded with a variable or everchanging magnetic field. As the alternating current increases from zero to a maximum value in one direction, the lines of force expand outward around the conductor; and as the current again decreases to zero, the lines of force also shrink together and collapse within the conductor. As the current reverses and increases to a negative maximum, the lines of force again expand, but this time act in the opposite direction. With the current again decreasing to zero, the lines of force again collapse. An alternating current is thus sur- rounded with a variable or pulsating mag- netic field. Such a magnetic field, we will learn in the next chapter, plays an im- portant part in the operation of all Radio transmitting and receiving apparatus. In fact, the entire art of Radio is based partly upon the possibility of establish- ing such variable magnetic fields. The Third Chapter With this chapter we have practically completed our study of the electrical fun- damentals of Radio, and are now ready for the third chapter in which will be taken up the subject of oscillating cir- cuits. Oscillating circuits and the high frequency currents established in them form the real essence of all Radio opera- tion. The third chapter is, therefore, a most important one; and no one who de- sires to learn all about Radio can afford to miss that chapter. Lightning Arrester The construction of a lightning arrester shown in the illustration uses the brass ends of shot gun shells for making the - Pur«M OWT Mi-ttt CAP AWOTAProee/Jz'sCSEV -USJD I2GUAGC SHOT GUN SHELLS, &URN OUT PAPCff^ TOSCT S/*"wATCRGtJ»&S -Iff / .«=■= TOSET body. A short tube is used between the shell ends. The base is made of bakelite or porcelain. — George M. Swallow, Daven- port, Iowa. ATWATER KENT Immediate Delivery Dealers: Write for Discounts Hudson-Ross, 123 W. Madison, Chicago To Yearly Subscribers Only Limited Number of BOUND VOLUME TWO RADIO DIGEST Volume Two 13 Numbers July 15— October 7, 1922 Now Ready for Delivery- Post Prepaid, Only Parcel $ 2.00 On account of the limited supply, the sale of these bound volumes No. 2 is limited strictly to those readers of the Radio Digest who have subscribed for a year. TO NEW SUBSCRIBERS One year subscription to Radio Digest and ^J ^7 ^^#"^ both bound volumes 1 and 2 *P # • v/ v/ By subscribing now for one year to the Radio Digest you get both BOUND VOLUMES 1 AND 2, 26 numbers, with one year's subscription for $7.00. or either volume 1 or 2, FREE with a year's subscription to Radio Digest . . ALL ORDERS MUST BE SENT DIRECT— No orders on this offer will be accepted, through subscription agencies, news dealers or other sources. Check, money or express orders (no stamps) must accompany all orders. $5.00 Supply Limited — Better Harry TEAR HERE— MAIL COUPON I PUBLISHER, RADIO DIGEST ILLUSTRATED, 123 West Madison St., Chicago. Illinois. ■ I hare already subscribed to the Radio Digest for one year, I so please reserve me one bound volume Number Two for whiek I I am enclosing check — M. O. for Two Dollars. I Please reserve me Bound Volume Number One and also Num- | ber Two and one year's subscription to the Radio Digest, a Illustrate- 1, for which I am enclosing check — M. O. for Seven J Dollars. I Name ■ Address — ^^^ J City Stat* RADIO DIGEST ILLUSTRATED Panel Shield Prevents Body Capacity I Grounding Shafts Aids in Eliminating Capacity Finding that I still had considerable trouble from body capacity in the opera- tion of a Copp circuit receiving set, even after the panel had been carefully shielded, WORKSHOP KINKS? EARN A DOLLAR— THERE are many little kinks worked out at home that would aid your fellow Radio worker if he only knew about them. There are new hook-ups, new ways of making parts and various unique ways of op- erating sets at are discovered every day. RADIO DIGEST is very much in- terested in securing such material. Send them in with full details, includ- ing stamped envelope so rejected copy may be returned. The work must be entirely original, not copied. RADIO KINKS DEPARTMENT, RADIO DIGEST, 123 West Madison St., Chicago, 111. I investigated for the trouble, found it and got rid of it in the following manner: The body capacity appeared to come from the arrangement of shafts for the movable sections of both the aerial con- denser and the variocoupler which carried it to the front of the panel and outside of the protection of the grounded shield. The trouble was overcome by changing the connections to both the condenser and the variocoupler. The sketch is self-explana- tory.— E. H. Rankin, Lakewood, O. Plugging in the Aerial Where the aerial lead-in enters the house I fastened an ordinary electric light socket with screws to the wall and con- nected the lead-in to one of the two screws in the socket. To the other screw is con- GKOOND ^ nected to the inside ground wire. A small piece of ordinary drop light cord is at- tached to the aerial and ground binding posts. The other end has a regular light plug attached. When ready for use I in- sert the plug. — William Graham, Chicago, 111. Long Distance Receiver The articles required for this set are one variometer, one 23 or 43-plate variable condenser, phones, batteries, detector tube, socket, rheostat and grid condenser. The variometer is split, or, in other words, where one end of the stator is con- nected to the rotor metal plate, this lead .001 or .boos ROTOia. STATOR is taken off and the rotor is used as the plate inductance and the stator ends are connected, one side in the grid and the other side in the ground. Using about 28 voits on the plate and cuwith an aerial about 60 feet long, seven tourist 'H?h J* °"^end andt ?? **«* high at -■■.ii " V he following stations have been * AS? M^sTrega? WHAS> PTO, WHB, ^d by tiix. COPP CIRCUIT RECEIVING SET y* CONNECT AERIAL LEAD-IN TO ROTOR. OF CONDENSER- CONNECT TO STATOR. orcoNDENsea.. Sz _a! CONNECT TO REAR. BEARING OF ROTOR. ON VARIO-COOPLER.. / CONNECT TO FRONT BEARING OF ROTOR. ON VARIO-COUPLER-. ■sh^j-m; SHIELD A-*- A- B- Bt *PH0N6S'' WDAP, WFAF, WOC, CKAC, WWG, KTW, WBAP and WPAA. If the amateur has difficulty in getting this set to operate, he should reverse the A battery, or if he has a rather large aerial he may get better results by using the tap where the two halves of the rotor are joined. — Samuel Wells, Atlantic City, N. Y. Mounting for Honeycomb Coils Homemade coils are difficult to mount and are a nuisance if placed on the table in front of the cabinet. The coils may be I -yo I S TO 6"- 0OIL.S MOUNTED ON PrtNEU. /"IN held in an upright position with a strip of tin which is from 5 to 6 inches long and about y2 inch wide and bent as shown in the illustration. After shaping the strip, mount it in a convenient place on the cab- inet panel. If two coils are used, four binding posts are necessary, two of which are mounted just below each coil, then enough wire is taken off the coil so that it will reach to the binding posts and still have enough wire to let the coil move back and forth on the tin bracket to cause re- generation. The other binding posts are put on the panel in the same way, except that it is put a little over and under the other coil, S~T7AEK/al vltfiG£ 10 VOLTS o/e/K 1/oi.ri even then by moving the coils closer together or farther apart it will cause regeneration, providing they are connected right. If three coils are used and one is to be sta- tionary, the stationary coil wires may be drawn through the panel and pulled up firm to it so that it will rest easy against the panel and connect it. The other two coils are put on as shown in the illustra- tion, except that one coil will be on each side of the stationary coil. If regeneration is desired from a two coil hook-up the diagram gives one that received up to 200 miles distinctly. This hook-up I am using with great success.— Kenneth "Voeck, Baraboo, Wis. Homemade Multiple Headset Usually when a receiving set is work- ing good there are more persons want- ing to listen in than there are headsets. If there is one headset at hand a multi- ple hearing device can be made from a good, sound cigar box. Procure some rubber tubing, 3 or 4 feet for each per- son, and drill holes in the sides of the box for the tubing to fit in snugly. Tune in as loud as possible and detach the receivers from the headset and place them in the box. Each member of the party listens in through a rubber tube with its end placed in the ear. — Glenn E. Ganfin, Escanaba, Mich. In buying or building a receiver, select a design capable of rendering selective tuning. Signal Light on Loud Speaker A friend of mine arranged a handy at- tachment for my loud speaker, which, after my first carelessness in leaving my battery connection on, has saved me much trouble and expense in recharging the battery. He attached a small automobile lamp and socket on the base of the loud speaker by spreading the twisted wires sufficiently to slip them over the socket. The wires were held together on 2ach side of the socket with tape. The ends of the wires were connected to the back of the loud, speaker. When connections are made with the loud speaker the small light is a constant reminder that the current is on, and I never forget now to disconnect the battery circuit when I am through using the instrument. — J. Howard Howe, Lewis- ton, Idaho. MYERS TUBES Dealers: Write for Discounts Hudson-Ross, 123 W. Madison, Chicago SOMERVILLE TERMINAL TAGS Sc READINGS ANTENNA HI-VOLTAGE + GROUND HI-VOLTAGE — OUTPUT LO-VOLTAGE -+- INPUT LO-VOLTAGE — TICKLES MODULATION "Slip under any Binding Post — Like Washers" "The Original and Best" at Your Dealer or Direct Somerville Radio Laboratory 43 CORNHILL, BOSTON, MASS. [Ten Variations in Grid Leak Increase Signals Procure ten switch points, one switch knob, one grid condenser and one bind- ing post. Fasten the switch on the panel. In the track of the switch place the switch points spaced equally about one- half inch apart, then between the first two points draw a light line with a soft lead pencil. Between the next two BINDING POST ^K GRID CONDENSER WITCH KNOB GRIOLeAK. 1/ draw a heavier line and so on, drawing heavier lines until you have made five grid leaks, then make the hook-up as shown in the diagram. Place the switch spring on the point No. 1. If the signals are heard, but not loud enough, turn to the next two, and so on until the signals are heard the best. — M. Hindert, Peoria, 111. Mount for Spider Web Coils The illustration shows a tray-like sup- port for holding spider web coils. It is made of wood to the dimensions given, INSERT 5PIDER.WEB COILS IN GROVES. although any width may be used suitable to the diameter of the coils. The coils slide in the grooves. Binding posts may be placed on either side. — Irving A. Brown, Anthony, R. I. Phantom Tuner S19.7S will brine one of these raarvelously sensitive instruments to your address, prepaid- No aerial, ground. loop or radin frequency used. All parts highest quality. Cutler Hammer, Remler. Dubelier, etc mounted on genuine bakelite panel. Complete instructions fur- nished for wiring. No soldering necessary. Have music on Btrip of lamp cord one hour after set arrives. Our Phantom gets over distance and is practical using detector only. Wind lamp cord in auto top and tune in music while driving. We've done it often. Send stamp for booklet and learn the Phantom story VESCO RADIO SHOP. Box D-704. Vacaville, Calif. INCREASE YOUR RANGE BY ADDING A PERFECTLY CON- STRUCTED VARIABLE CONDENSER TO YOUR SET II PLATE $1.25 23 PLATE 1.40 43 PLATE 1.75 Mail Orders Pilled Same Day Postage Extra No Personal Checks Accepted B. K. Ford & Co.'"\:;^lT ,£~ ^ tifetfeW REAL CABINET TYPE $< LOUD SPEAKERS Not just a common horn built into a cabinet. Beautiful— Com- pact—THE TONE OF FINE CABINET PHONOGRAPHS. Make your two-step set a HOME ENTERTAINER. All SPI- ROLAS are of the best construction, with fine, rubbed finishes ana are absolutely guaranteed. SPIR0LA DUPLEX— uses any headset. Satin black (DB) finish $3.85. Oak (DO) or mahogany (DM) finish $4.85. SPIR0LA SIMPLEX— uses Baldwin or other unit Black (SB), oak (SO), mahogany (SM) finislt. same prices as DUPLEX. SPIROLA CONCERT— complete -tflth built-in unit and cord. Oak (CO) or mahogany (CM) finish $12.50. •*■ At dealers or postpaid (C 0. D. if preferred) L. H. DONNELL MFG. CO., DEPT. D, BOX 70, ANN ARBOR, MICH. 1 RADIO DIGEST ILLUSTRATED How to Mr % an^ Operate the Reinartz Receiver An Ey* Nation of the Photo Diagram Shown on Page Seven By II. J. Marx Tijf-page 7 contacts and binding posts in position HE photo diagram Shoy^flain the first. Before placing the two right upper and the following arti -^rReinartz binding posts in position, slip a small .002 construction »nrt nst. .oivino- sot mfd. fixed condenser under these two posts. In the set shown, a condenser having a 1-inch space between terminal holes, made the mounting on the phone posts easy. Next mount the switch levers and knobs so that they "feel" right when turned. The two variable condensers follow In order, and the vernier rheostat is the next to be fastened to the panel. construction and use jeiving set merative tuner. Th y Benjamin was designed and bufrt associated E. Freund, technical j Stock Store, with the Chicago S;o. The Reinartz Radio dealers, of Ch and efficient, has tuner, highly sensi'..xtensively by the long been used ve amateurs of this long distance reiarity with the great country, but its p. Figure 1 body of Radiophone listeners in, has been only short lived. The panel layout and circuit diagram accompanying this article are those used by Mr. Freund in making the set which is pictured in photo diagram. Farts Required The set, if constructed exactly as shown, will require one bakelite or formica panel 18 inches long by 7 inches wide and i35 inch thick, eight binding posts, two three- inch dials, one rheostat dial, three switch levers (%-inch shanks) and knobs, 16 switch contacts (%-inch shanks), six switch stops, three fiat head nickeled wood screws 1% inch long, one 23-plate variable condenser, one 11-plate variable condenser, one variable grid leak and condenser, combination CO to 5 megohms and .00025 mfd. respectively), one stan- dard four-prong tube socket, one .002 mfd. fixed phone condenser, one vernier fila- ment control rheostat, No. 14 tinned bus wire for connections, and, one spider web coil Reinartz wound. The latter in this case is known as the "BarrChasCo" inductance and is made by the BarrChas Radio Coil Company of Springfield, Massachusetts. However, the photo diagram is illustrative of the method of winding a similar coil in the event one so desires. Extras Necessary In addition to the parts there will be needed phones, a hard or soft tube, B bat- tery, -and A battery. This circuit will function well with any tube, provided the correct plate voltage is used. With Cunningham 300 or other soft tubes a B battery or plate voltage of 22% will be ample. With a WD-11 and other hard tubes, 45 volts or more should be used. A six-volt storage battery is indicated in the photo diagram. This is proper for lighting the filament of a standard tube, but a battery of only four volts should be used with a Myers tube, and of only one and one-half volts (dry or wet cell), with the WD-11 or TJV-199 tube. The base used in making the set il- lustrated was of poplar and is designed so that the entire assembled panel and mounted apparatus will slide into the cab- inet which affords the ultimate housing. The cabinet can be made to suit one's fancy or can be purchased already finished. In the latter case, the panel dimensions should be made to agree with the space allowed for the panel in the finished cabinet nearest approximating the necessary size. Drilling the Panel The first step in the construction is the drilling of the panel. It is here suggested that bond or other tough finished paper be pasted on the panel with library paste. The paper should be stretched tightly and should be smooth against the side of the panel to be the front when finished. After the paper is mounted securely and dry, the holes nec- essary to be drilled should be laid out in pencil on the paper. After making sure that the holes are located properly on the paper, the centers should be center- punched carefully. Figure 1 shows the dimensions for locating and drilling the panel for the set shown on page seven. Three drill sizes are necessary, %, %, and % inch. After drilling the holes, the paper may be peeled off, and the sticking parts can be rubbed off with a moistened cloth. It is to be noted here that no holes are indicated for the mounting of the panel on the base. However, if it is de- sired to follow the design shown, drill these holes Vs inch in diameter, % inch from the bottom edge in the center of the panel and 1% inches from each end. Steps in Assembly To make the assembly more easy, it it advisable to insert and lock the switch The tube socket, variable grid leak-con- denser combination, and Reinartz spider web should then be fastened to the base in the relative positions shown in the bottom photograph of page seven, which view is of the base, looking down on it from above. Mounting Spider Web Coil Mounting the spider web coil should not be difficult and can almost be left to the will of the builder. In the set shown a "BarrChas" coil was used and was only laid, not fastened, on a circular disk isfactorily, if one desires to affect an economy here. The coil should be mounted with the eight tuning inductance leads toward the front, the three grid Inductance taps to the rear right, and the four plate induc- tance taps should be at the rear left, as one faces the front of the panel. Wiring1 the Set Properly More good sets go wrong from im- proper wiring than from any other single reason. It is for this reason that the con- ventional wiring chart shown as Figure 2, and drawn by Mr. Freund, should aid in placing the connecting tinned copper bus wires properly. The photo diagram, page seven, also will aid in making these connections. Make all bends neat, and ALWAYS SOLDER to the taps, apparatus or bind- ing posts. It is to be forewarned here that the eight tuning inductance taps (top center switch) would best be left unconnected until the last, as their positions will in- terfere with soldering other connections. Purchasers of the manufactured "Barr- Chas" spider web inductance will receive with it a printed circular which will aid materially in assembling this outfit. The Figure 2 layout is designed to re- semble the front of the panel and base of the set in a fiat projection so as to show the necessary connections more simply. It will be noted that the two top taps on the right, or grid inductance, switch, are connected together. This was done only to secure balance, that is, so that both the right and left switches would have four contacts on the front of the panel, and hence, look symmetrical. Explanation of Finished Set For both the builder and the interested Reinartz owner, the operation explanation Figure 2 of panel material, which was supported % inch away from the wooden base by use of a %-ihch long spacing washer un- der the disk in the center, through which a wood screw was fastened. A small, ten cent disk talking machine record, new, can be used to support the coil very sat- Kellogg Radio may be valuable. The photo diagram shows the necessary external connections and names the parts in a proper fashion, and so as to avoid confusion. It is difficult to give definite sure-fire rules for the positive working of a sensi- tive regenerative set. That is what the Reinartz Is. It is only possible to lay down general rules for the possible op- eration, and let the experimenter's ex- perience carry him on from there. The left and right condensers should be set at zero capacity (all the plates out). The plate inductance switch (left) should rest on the bottom contact point. Tuning inductance switch (center) is left on about the center contact, and the grid Inductance switch (right) should be also on the con- tact point next to the bottom. The rheostat may be adjusted now until the hissing or howling (oscillation) point is just approached. Probably the best advice to give (at least the most practical) is to vary the center and right switches until the signals come in best. Then adjust the 11-plate variable condenser (right) until the best position is found. Next it is advisable to vary the plate inductance switch and the 23-plate condenser (left) until full regeneration without distortion is obtained. Small changes in the adjustments now may even better the reception. It is neither advisable nor necessary to burn the tube filament very brilliantly. See how low the rheostat can be turned once and you may be surprised at the good results. The antenna system for best results with this set should not be much over or under 100 feet in length. RADIO SUPPLIES STORES Prompt Service— Quality Goods— Priced Right Radio Division TELEPHONE MAINTENANCE CO. 20 S. Wells St. Franklin 3986 5206 W. Madison, Austin 7041. 1122 E. 47th Si L.ok tor the TELMACO Sign GOV'T. RADIO STORAGE BATTERIES All absolutely new Signal Corps Batteries. Edison 3 cell type liB-J $4.50; Willard 4 cell type SYK-13 $4.25: Wil- lard 2 volt 40 A. H. for WD-11 tubes $4.75; 6 volts Edi- son $7.75; Edison B Battery elements 4c each. FLEWELLING .006 CONDENSERS Bakelite mounted with binding posts. Set of three $2.90. FLEWELLING SPIDER WEB COILS Easier tuning; clearer signals; Green silk wound $1.75 ea. FLEWELLING VARIABLE GRID LEAKS Give clearer music, louder signals on any circuit, 75c. REINARTZ LATEST SPIDER WEB COILS Double green silk winding on Bakelite spider $1.95. VERNIER FOR VARIABLE CONDENSER Fits any condenser. Requires no extra space, 95c. HI-POWER AMPLIFYING TRANSFORMERS Best made. Louder signals. Cannot bum out. $2.95. Call Book of all Canadian Stations, $1.25. S000 Meter long wave couplers. $7.95. We save you money. Tell us what you need. QUALITY RADIO SHOP, RICHMOND, IND. for Better Results 1, Easy to Mount— Simple to Operate Variometer Microphone All Bakelite moulded var- iometer. Two rotor and three stator terminals. Standard wound. For panel or base mounting. No. 501 Each $8.00 Dial Four-inch, all Bakelite. Non-warping, reinforced construction. No. 502 Each $1.25 Standard Microphone. Super* sensitive. The result of twenty- five years experience. No. 21 Each $8.90 Plug The Kellogg plug fits all jacks. It is of strong construction and handsomely finished. No. 501 Each $1.00 Head Set The value of extremely light and very small head sets in Radio receiving is most evident when using Kellogg head receiv- ers, which, however, have proved as sensitive and thoroughly ef- ficient as they are light in weight and small in size. Jack Positive contacts, con« stant spring tension. Dur- able insulated frame. Variable Condenser No. Each 501^4 Conductor. .$1.10 502—2 Conductor. . .75 503 — 3 Conductor. . .80 504 — 4 Conductor. . 1.10 505 — 6 Conductor. . 1.25 No. 69A No. 69A Head Set, 2400 ohms Each $10.00 No. 69C Head Set, 2000 ohms Each $8.00 No. 74A Head Set, 1000 ohms (Single). Each $5.00 This condenser is of the dec- remeter type and is unusu- ally well constructed. No. 601 11 plate wit*- 5 plate Vernier. Knob anu 4-inch Dial. Each $6.75 No. 602 11 plate without Ver- nier. Less Knob and Dial. Each $4.50 No. 603 23 plate with 5 plate Vernier. Knob and 4-inch Dial. Each $7.75 No. 604 23 plate without Ver- nier. Less Knob and Dial. Each $5.50 No. 605 43 plate with 5 plate Vernier. Knob and 4-inch Dial. Each $8.75 No. 606 43 plate without Ver- nier. Less Knob and Dial. Each $6.50 KELLOGG SWITCHBOARD & SUPPLY CO., CHICAGO \S^ «*~rifc> 14 RADIO DICES LEU ST R AT E D RADIO DIGEST STANDARD C AER-IAU Y JL, GROUND o — o LOOP I CONNECTED WIRES | + JUMPED OIS UNCONNECTED WIRES — 4>__ A BATTERV 6V. SEE NOTE - — "eS battery zz\ v up (MOTE— THE HEftVV SHORT UltSE. REPRESENTS CARBON AINO IS ALWAYS -+■ OR POSITIVE . THE LONG- THIN LINE REPRESENTS ZINC AND IS ALWAVS — OR NEOATIVE. — Jf— FIXED CONDENSER. . -Jtf VARIABLE" CONDENSER. . O BINDING POST. SINGLE POLE SINGLE THROW SWITCH SINGLE POLE DOUBLE THROW SWITCH. DOUBLE POLE SINGLE 0 THROW SWITCH. °— '~ DOUBLE POLE DOUBLE THROW SWITCH. ■'■''.■V DOUBLE POLE DOUBLE VC THROW CONTACT s-vr^^o* SWITCH. o-' ^S2> tfwwm n^m,SPnugt,ve t^VyVVVSA-0 POTENTIOMETER. o-AA/VWV* RHEOSTAT GRID LEAK 1 AND CONDENSER IRON CORE CHOKE COIL. AUDIO FREQUENCY, 5 OR. IR.ON CORE ' TRANSFORMER- RADIO FREQUENCY OR AIR. CORE TRANSFORMER-. REVERSING SWITCH. CONTACT SWITCH. jg TICKLER C_ COIL ARRANGE- MENT SHOWING TICKLER.. SECONDARY LOOSE COUPLER.., VARIO COUPLER. (TAPPED PR.IMARV) VARIOMETERS o-TftTffrffTfY-o SINGLE SLII *-• VVyVU "— ° TUNING COI DE L. TWO SLIDE TUNING COIL ^7ocV?OOi ° THREE SLID °-' 000 00^ TUNING COI DC L. | <®> PT HONEYCOMB COIL. —Taj- — SPIDER WEE) COIL- AMMETER. VOLTMETER. MILLIAMETER-. 'JDIOrJ, THREE ^EMENT OR. V.IODE TUBE Ik dj^ ORE^3VALVE REct,^\Rowe : filament CRYSTAL DET. A « TELEPHONE RECEU OR. HEAD SET. LOUD SPEAKER Sv J)' SPRING JACK. J) J-v-' 1) 2 SPR.1NG JACK. <*- SPRING JACK. 3 SPRING FILAMENT CONTROL JACK 5 SPPJ-ING FILAMENT CONTROL JACK The Reader's View A Flea for Grand Opera from the Metropolitan Let me add a word to the plea for broadcasting Grand Opera from the Met- ropolitan Opera Co. All who have had the privilege of listening in on the operas as -iven by the Chicago Civic Opera Co. will ree that Station KYW, with the co-op- Radio Receiving Sets a Mittmm <■ ' Federal DX Type 58 Radio Receiver As the seventeenth of the series of standard receiving sets, Radio Digest presents herewith the Federal DX Type 58 Radio Receiver, manufac- tured by the Federal Telephone and Telegraph Company of Buffalo, New York. This receiving unit employs the use of a tuned primary and tuned secondary circuit, one stage of Radio fre- quency amplification, a detector and two stages of audio frequency amplification. The circuit is non-regenerative, extremely selective, and in ad- dition, is very efficient. Full installation and operation instructions will be found on page six. Although the amateur may not' possess this par- ticular make of apparatus, it will be well for him to study the diagram fand instructions carefully. The points of similarity in standard types of re- ceiving sets will enable the beginner to benefit materially. Vacuum Tube Sockets Grid Leak r^vwvwvw-i and — Condenser tt Radio Frequency Transformer Secondary of Coupler Audio Frequency Transformers Rheostats — AA/VW^- Potentiometer — WA/\tyVW — , Primary Coil of Coupler Variable Condenser ■#■ lapped 5witch for Rough Wave Length Adjust- ment Dial. Controlling Coupling between' Circuits Dial&rWave Length Adjustment" of Secondary Peepholes +o Observ/e Whether Tubes are Lighted Tapped Switch for Fine Wave Length Adjustment 6V. ;'B" BATT. ZZVoS. Knobs Controlling Filament Lt£h+in| Knob Controlling Amplification Jacks Controlling Stages of Amplification 4-5V p d'l'M'W'l-l'Hv- a IS RADIO DIGEST ILLUSTRATED Radiophone Broadcasting Stations Corrected Every Week — Part III State, City, Call Alabama: Auburn, WMAV Birmingham, WOAY, WST Mobile. VVEAP Montgomery, WKAN Arizona : Phoenix, KDYW, KFAD, KFCB Tucson, KDZA, KFDH Atk&Ds&s * Fort Smith, WCAC, WGAR Little Rock, WCAV, WEAX Pine Bluff, WOK California: Altadena, KGO Bakersfield, KDZB, KYI Berkeley, KQI, KRE Del Monte, KLN El Monte, KUY Eureka, KNI Fresno, KDZH, KMJ Glendale, KFAC Hanford, KFBD Hollywood, KFAR Long Beach, KSS Los Angeles, KDZF, KDZP, KFCL KFI, KHJ, KJS, KNN, KNV, KOG, KUS. KWH, KXS, KYJ Modesto, KXD Oakland, KFBN, KLX, KZM Pasadena, KLB Reedley, KMC, KFAZ Richmond, KFCM Sacramento, KFBK, KVQ San Diego, KDPT, KDYM, KDYO, KFBC, KFFA, KON San Francisco, AG1, KDN, KDZG, KDZW, KDZX. KFDB, KLP, KLS, KPO, KSL, KUO, KZY San Jose. KFAQ, KQW, San Luis Obispo. KFBE Santa Ana, KFAW Santa Barbara, KFHJ Stanford Univ., KFGH Stockton, KJQ. KWG Sunnyvale, KJJ Taft, KFEB Venice, KFAV Colorado: Boulder, KFAJ Colorado Springs, KFFQ, KFBV, KFCK, KHD Denver, DD5, DN4 KDZQ, KEEP, KFAF, KFDL, KFEL, KLZ Trinidad, KFBS Connecticut: Bridgeport, WKAX Greenwich, WAAQ Hartford, WDAK Middleton, WOAS New Haven, WGAH, WPAJ Delaware: Wilmington, WHAV, WOAT, WPAW District of Columbia: Anacostia, NOF Washington, WDM, WEAS, WHAQ, WIL, WIAY, WJH, WMU. WPM, WWX Florida: Jacksonville, WDAL Miami, WFAW, WIAZ Pensacola, WGAN, WLAV Tampa WDAE, WEAT, WHAW West Palm Beach, WKAH State, City, Call Georgia: Atlanta, WGM, WSB College Park, WDAJ Decatur, WAAS Gainesville. WKAY Macon, WGAK, WMAZ Savannah, WHAO Idaho: Boise, KFAU, KFDD, KFFJ Moscow, KFAN Thomasville, WPAX Wallace, KFCC Illinois: Belvidere, WOAG Carthage, WRAM Chicago, KYW, WAAF, WBU, WDAP, WGAS, WJAZ, WMAQ, WNAJ, WPAD Decatur, WBAO, WCAP, WHAP Mattoon, WQAL Peoria, WJAN Quincy, WCAW. WCAZ Rockford, WIAB Springfield, WDAC Tuscola, WDZ Urbana, WRM Indiana : Anderson, WEAW Evansville, WNAM, WOAU Fort Wayne, WFAS Greencastle, WLAX Huntington, WHAY Indianapolis, WLK, WOH Marion, WIAQ Mishawaka, WBAQ Muncie, WJAF Richmond, WOZ South Bend, WGAZ Terre Haute, WEAC West Lafayette, WBAA Iowa: Ames, WOI Burlington, WIAS, WLAT Cedar Rapids, WJAM, WKAA Centerville, WDAX Council Bluffs, WPAF Cresco, WNAG Davenport, WHAI, WOC Des Moines, WGF, WHX Dubuque, WQAK Fort Dodge, WEAB Iowa City, WHAA Le Mars, WIAU Marshalltown, WLAR Newton, WIAH Shenandoah, WGAJ Sigourney, WOAD Sioux City, WEAU, WHAE Vinton, WIAE Waterloo, WHAC, WMAR, WRAN Kansas: Anthony, WBL Atwooa. WEAD Beloit, WPAR Eldorado. WAH Emporia, WAAZ Hutchinson, WLAS Independence, WFAY Liberal, WMAG Manhattan, WNAK, WTG Parsons, WOAJ Salina, WPAD Topeka, WJAQ, WPAM Wichita, WAAP, WE AH, WEY Kentucky: Bowling Green, WNAB Frankfort, WOAK Louisville, WHAS, WKAG, WLAP Paducah, WIAR State, City, Call Louisiana: New Orleans, WAAB, WAAC, WCAG, WGV, WIAF, WWL Shreveport, WGAQ Maine: Auburn, WMB Houlton, WLAN Portland, WJAL Maryland: Baltimore, WCAO, WEAR, WKC, WNAY Frostburg, WPAQ Massachusetts: Boston, WAAJ, WFAU, WNAC Dartmouth, WMAF Medford Hillside, WGI New Bedford, WDAU Springfield, WBZ Worcester, WCN, WDAS Michigan: Ann Arbor, WMAX Bay City, WTP Dearborn, WWI Detroit, KOP, WCX, WWJ East Lansing, WKAR Flint, WEAA Kalamazoo, WOAP, WLAQ Lansing, WHAL Laurium, WPAV Saginaw, WIAW Minnesota: Duluth, WJAP, WMAT Hutchinson, WFAN Minneapolis, WBAD, WBAH, WCAS, WLAG, WLB Moorhead, WPAU Northfield, WCAL St. Cloud, WFAM St. Paul, WAAH Missouri: Butler, WNAR Cameron, WPAQ Columbia, WAAN Independence, WPAG Jefferson City, WOS Joplin, WHAH Kansas City, WDAF, WHB, WMAJ, WOQ, WPE Marshall, WJAT Rockport, WMAD St. Joseph, WEAK St. Louis, KSD, WCK, WEB, WEW, WMAY, WRAO Springfield, WIAI, WKAS, WQAB Tarkio, WIAT Webster Grove, WOAL Montana: Billings, KFCH Butte, KFAP Great Falls. KDYS Havre. KFBB Polytechnic, KFED Nebraska: David City, WRAR Fremont, WOAE Hastings, WKAM. WQAY Lincoln, WFAV, WGAT, WIAX, WJAB, WKAC, WLAF, WMAH, WQAP, WSAS Norfolk, WJAG Omaha, WAAW,» WDV, WIAK, WNAL, WOAW, WOTJ, WOV Rushville. WEAV Tecumseh, WTAU University Place, WCAJ State, City, Call Nevada: Reno, KDZK, KFAS, New Hampshire: Laconia, WKAV New Jersey: Atlantic City, WHAR Camden, WRP Jersey City, WAAT, WNO Moorestowri, WBAF Newark, WAAM, WBS, WJZ, WOR N. Plainfield, WEAM Ocean City, WIAD Paterson, WBAN Roselle Park, WDY Trenton, WMAL, WOAX New Mexico: Roswell, KNJ State College, KOB New York: Albany, WNJ Amsterdam, WPAS Binghamton, WIAV Buffalo, WGR, WWT Canton, WCAD Cazenovia, WMAC Ithaca, WEAI Lockport, WMAK Newburgh, WCAB New York, KDOW, WBAY, WDT, WEAF, WJX, WLAW, WWZ Poughkeepsie, WFAF Rochester, WHAM Ridgewood, WHN Schenectady, WGY, WRL Syracuse, WBAB, WDAI. WFAB, WLAH, WNAN Tarrytown, WRW Troy, WHAZ Utica, WSL Waterford, WFAG . North Carolina: Asheville, WFAJ Charlotte, WBT Raleigh, WLAC North Dakota: Fargo, WDAY, WPAK Grand Forks, WOAB Wahpeton, WMAW Ohio: Akron, WOE Canton, WWB Cincinnati, WAAD, WHAG, WIZ, WLW, WMH Cleveland, KDPM, WHK, WJAX Columbus, WBAV, WCAH, WEAO, WMAN, WPAL Dayton, WA1, WFO, WJAJ Defiance, WCAQ Fairfield, WL2 Granville, WJD Hamilton, WBAU, WRK Lebanon, WPG Lima, WOAC Marietta. WBAW Springfield, WLAM, WNAP Stockdale. WJAK Toledo, WBAJ WJK Warren, WLAZ Washington C. O., WGAX Wooster, WGAU Youngstown, WAAY Oklahoma: Ardmore, WOAA Enid, WNAF Muskogee. WDAV Norman, WNAD State, City, Call Okemah, WKAK Oklahoma City, WKY, WMAB Okmulgee, WPAC Tulsa, WEH, WLAL Oregon : Astoria, KFBM, KFGG Corvallis, KFDJ Eugene, KFAT Hood River, KQP Marshfield, KFBH Medford, KFAY Pendleton, KFFE Portland, KDYQ, KFEC, KGG, KGN, KGW, KQY Salem. KFCD Pennsylvania: Altoona, WGAW Bridgeport, WBAG Brownsville, WDAQ Clearfield. WPI Crafton, WAAX Easton, WMAP Erie, WOAV Grove City, WSAJ Johnstown, WTAC Lancaster, W8AL McKeesport, WIK Parkesburg, WQAA Philadelphia, WCAU, WDAR, WFI, WGL, WIP, WNAT, WOO, WW AD Pittsburgh, KDKA, KQV, WCAE, WHAF, WJAS Scranton, WLAO, WQAN, v WRAY State College, WPAB Villanova, WCAM Wilkes-Barre, WBAX, WKAZ, WNAH Rhode Island: Cranston, WKAP Edgewood, WEAG East Providence, WKAD Providence, WEAN, WJAR South Carolina: Charleston, WFAZ, WNAQ, WOAH Orangeburg, WGAM South Dakota: Rapid City, WCAT Sioux Falls, WFAT Vermillion, WEAJ Yankton, WAJU, WNAX Tennessee: Knoxville, WNAV Lawrenceburg, WOAN Memphis, WKN, WPO Abelen'e, WQAQ Amarillo, WDAG, WRAU WRAU Austin, WCM, WNAS Beaumont, WMAM College Station, WTAW Dallas, WDAO, WFAA, WRR El Paso, WDAH, WPAT Fort Worth, WBAP, WPA Galveston, WHAB, WIAC Houston, WCAK, WEAY, WEV, WGAB, WRAA, WSAV Laredo, WW AX Orange, WKAD Plainview, WSAT Port Arthur, WFAH San Antonio, AS6, DM7, WCAR, WJAE, WOAI Stanford, WOAZ Tyler, WOAF Waco, WJAD, WLAJ, WWAC Wichita Falls, WKAF State, City, Call Utah: Ogden, KDZL Salt Lake City. KDYL. KDYV, KZN Vermont: Bellows Falls. WLAK Burlington, WCAX Springfield, WQAE Virginia: Blacksburg, WEAE Fortress Monroe, WNAW Portsmouth, WOAQ Washington: Aberdeen. KNT Bellingham. KDZR Central ia, KDZM Everett, KDZZ, KFBL Lacey, KGY Pullman, KFAE Seattle, KDZE, KDZT, KFC, KHQ, KJR, KTW, KZC Spokane, KFDC, KFZ Tacoma, BE1, KFBG, KFEJ, KGB, KMO Walla Walla, KFCF Wenatchee, KDZI, KZV Yakima, KFV West Virginia: Clarksburg, WHAK Morgantown, WHD Wisconsin: Beloit, WKAW Kenosha, WOAR Madison, WGAY. WHA Milwaukee, WAAK, WCAY, WHAD. WIAO Neenah, WIAJ Superior, WFAC Waupaca, WPAH Wyoming: Casper, KFCQ, KFDF Laramie, KFBU Alaska: Fairbanks, WLAY Hawaii: Honolulu, KDYX, KGU, KYQ Porto Rico: Ensenada, WGAD San Juan, WKAQ Canada: Calgary, CHBC, CHCQ, CFAC, CFCN, CJCY Edmonton, CHCC, CJCA Fort Frances, CFPC Halifax, CFCE, CJCS Hamilton, CKOC Iroquois Falls CFCH Kitchener, CJCF London, CFCX, CHCS, CJGC, CKQC Montreal, CFCF, CFZC, CHCX, CHYC, CJBC, CKAC, CKCS Nelson, CJCB Ottawa, CHXC Regina, CKCK St. John, CJCI, CKCR Toronto, CFCA, CFTC, CHCB, CHCZ, CHVC, CJCD, CJCH, CJCN, CJSC, CKCE, CKCZ, Vancouver, CFCB, CFYC. CHCA, CHOC, CJCE, CKCD Walkerville, CFCI Winnipeg, CHCF, CJCG, CKCB, CKZC, CJNC Cuba: Havana, PWX (NOTE. — The third and last part of the schedule list appears below. Next week the first part will appear. ) WLAS, Hutchinson, Kan. Hutchinson Grain Radio Co. WLAT; Burlington, Ia. Badio and Specialty Co. WLAV, Pensacola, Fla. 200 mi. Elec. Shop. Inc. Daily ex Sun, 8-9 pm, music, entertainment. Cen- tral. WLAW, New York, N. T. New York Police Dept. WLAX, Greencastle, Ind. Greencastle Community Broadcasting Station. (Putnam Elec. Co.) WLAY, Fairbanks, Alaska. Northern Commercial Co. WLAZ, Warren. O. Hutton & Jones Elec. Co. WLB, Minneapolis, Minn. Univ. of Minn. 100 mi. Daily ex Sun. 12-12:30 pm, 7:30-7:50. Central. WLK, Indianapolis. Ind. 485 also. 500 mi. Hamilton Mfg. Co. Daily ex Sun, 11-11:30 am, 12-12:30 pm, 2-2:30, 3-3:30, 5r5:30, reports. Tues, Thur, 8:30- 10 pm, concert. Sun, 2-4 pm, 8:30-10. Central. WLW, Cincinnati, O. 485 also. 500 mi. Crosley Mfg. Co. Daily ex Sun, 10 am-3 pm, music, reports. Tues, Thur, Fri, 8-10:30 pm, music, news. Sun, 11 am, church service. Central. WMAB, Oklahoma City, Okla. 500 mi. Badio Supply Co. Daily ex Sun. 9:30-10:30 pm, music. Fri. 11:30- 12:30 pm. Central. WMAC, Cazenovia. N. Y. 330, 250. 275 only. 500 mi. C. B. Meredith. No definite schedule. WMAD, Rock Port, Mo. Atchinson County Mail. WMAF. Dartmouth, Mass. Bound Hills" Radio Corp. WMAG, Liberal, Kan. 75 ml. Tucker Elec. Co. Daily ex Fri, Sun, 7:30-8:30 pm, music, news. Fri, 8-9 pm, concert. Central. WMAH, Lincoln, Neb. 100 mi. General Supply Co. Daily ex Sun, 2:15 pm, music, news. Mon, Thur, 7:30 pm, music. Central. WMAJ, Kansas City, Mo. 485 also. 600 mi. Dally Drovers Telegram. Daily ex Sun, 8:15 am, 9:15, 10:15, 11:15, 12:15 pm, 2:15, weather, markets. Cen- tral. WMAK, Lockport, N. Y. Norton Labs. WMAL, Trenton, N. J. 100 mi. Trenton Hdwe. Co. Mon. Thur, 7:30-9 pm, music, lecture. Eastern. WMAM, Beaumont, Tex. Beaumont Badio Equipment Co WMAN, Columbus, 0. 50 mi. First Baptist Church. Sun., 10:30-12 m., 7:30-9 pm, church services. Cen- tral. WMAP, Easton. Pa. Utility Battery Service. WMAQ, Chicago, 111. 2,000 mi. Chicago Daily News. Mon. Wed, Fri. Sun, 7-7:30 pm. Sat, 4:35-5 pm. Tues. Thur, 9:15-10 pm. Central. WMAR. Waterloo, Iowa. Waterloo Electrical Supply Co. Schedule not established. WMAT, Duluth. Minn. Paramount Radio Corp. WMAV. Auburn. Ala. Ala. Polytechnic Inst WMAW, Wahpeton, N. D. 50 mi. Wahpeton Elec. Co. Daily, 7-7:30 pm, music, sports, news. Cen- tral. WMAX. Ann Arbor, Mich. K. & K. Radio Supply WMAY. St. Louis, Mo. 1,000 mi. Kingshighway Presbyterian Church. Sun, 11 am, 8 pm. Tues, 7-8 pm, church services. Central. WMAZ, Macon, Ga. 250 mi. Mercer University. Daily ex Sun, 5:30-6 pm, 7-7:30, 8:30-9:30, music Tues, Wed, Thur, 10:30-11 am, chapel. Eastern. WMB, Auburn. Me. Auburn Elec. Co. WMH, Cincinnati. O. 485 only. 500 mi. Precision Equipment Co. Daily ex Sun, 11 am, 4 pm, reports. Mon, Wed, Sat, 8:15 pm, entertainment. Central. WMU. Washington, D. C. 100 mi. Doubleday-HUl Elec. Co. Daily, 4:30 pm. concert, sports. Thurs, 8.9. concert. Eastern. WNAB, Bowling Green, Ky. 500 mi. R. D. Nichols. Daily ex Tues, 4-5 pm, 7:30-9, music. Central. WNAC, Boston, Mass. 200 mi. Shepard Stores. Daily ex Sun, 4-5 pm, dance music. Tues. Thur. 7-8:30 pm. Wed. Sat. 9:30-11 pm, Fri, 8-9:30 pm. Sun, 11-12 am, 6:30-8:30 pm, church services. Eastern. WNAD. Norman, Okla. 200 mi. Okla. Radio Engineer- ing Co. Daily ex Sun, 7:45-8:15 pm, news. Cen- tral. WNAF, Enid, Okla. Enid Badio Dist. Co. WNAG, Cresco, Ia. Hothert Badio and Electric Shop. WNAH. Wilkes-Barre, Pa. Wilkes-Barre Radio Re- pair Shop. WNAJ, Chicago. 111. Benson Co. WNAK, Manhattan, Kans. Manhattan Radio Supply Co. WNAL, Omaha, Neb. R. J. Rockwell. WNAM, Evansville, Ind. 200 mi. 485 also. Ideal Apparatus Co., Inc. Mon, Wed, Fri, Sat, 10-11 am, music, reports; 3-4 pm, 7-8, entertainment. Sun, 3-4 pm, music. Central. WNAN, Syracuse, N. Y. Syracuse Radio Telephone Co. WNAQ, Charleston, S. O. Charleston Radio Elec. Co. WNAP, Springfield, O. 200 mi. Wittenberg College. WNAR, Butler, Mo. C. C. Rhodes. WNAS, Austin, Tex. Tex. Radio Corp. (Austin States- man). WNAT, Philadelphia, Pa. 500 mi. Lennig Bros. Co. Daily ex Sun, 12:15-1 pm. Wed, Sat. 7:30-9:30 pm. Sun; 2:30 pm, 4:30, church services. Eastern. WNAV, Knoxville, Tenn. People's Tel. & Telg. Co. WNAW, Fortress Monroe, Va. Henry Kunzmann. WNAX, Yankton, S. D. Dakota Radio Apparatus Co. WNAY, Baltimore, Md. Shipowners Radio Service. WNJ, Albany, N. Y. 60 mi. Shotton Radio Mfg. Co., Inc. Daily ex Sun, 10-10:15 am, market reports. Wed, 8:15 pm, concert. Eastern. WNO, Jersey City, N. J. Wireles3 Telephone .Co of Hudson Co.. N. J. WOAA, Ardmore, Okla. Dr. Walter Hardy. WOAB, Grand Forks, No. Dak. 50 mi. 485 also. Val- ley Radio. Daily ex Sun, 10-11 am, 2-2:30 pm, en- tertainment, reports. Sun, 3-4 pm, music, church service. Central. WOAC. Lima, O. Maus Radio Co. WOAD, Sigourney, Ia. Friday Battery & Elec. Co. WOAE, Fremont, Nebr. Medland College. WOAF, Tyler. Tex. Tyler Commercial College. WOAG, Belvidere, HI Apollo Theatre. WOAH. Charleston, S. C. 200 mi. Palmetto Radio Corp. Mon, Thur, Sat, Sun, 10 pm-1 am, music. Eastern. WOAI, San Antonio. Tex. 485 also. 1,800 mi. South- ern Equip. Co. Daily ex Sun, 10:30 am, 12:15 pm, 3, 6, news, markets. Wed. 7:30-8:30 pm, concert. Sun, 9:30-10:30 am, 7-8:30 pm, concert. Central. WOAJ, Parsons, Kans. Ervin's Elec. Co. WOAK, Frankfort, Ky. Collins Hardware Co. WOAL, Webster Grove, Mo. William E. Woods. WOAN, Lawrenceburg, Tenn. 1,000 mi. James D. Vaughan. Daily, 8-9 pm, concert Central. WOAQ, Portsmouth, Va. Portsmouth Radio Assn. WOAP, Kalamazoo, Mich- Kalamazoo College. WOAR, Kenosha, Wis. H. P. Lundskow. WOAS, Middletown, Conn. 100 ml. Bailey's Radio Shop. Daily ex Sun, 4:15-6 pm, music. Sat, 9-12 pm, dance music. Eastern. WOAT, Wilmington, Del. Boyd MarteU Hamp. WOAU, Evansville, Ind. Sowder Bowling Piano Co. WOAV. Erie, Pa, Penna. Nat'l Guard. WOAW, Omaha, Nebr. Woodmen of the World. WOAX, Trenton. N. J. 342 only. 300 mi. F. J. Wolff. Intermittent schedule. WOAY, Birmingham. Ala. John M. Wilder. WOAZ, Stanford. Tex. Penick Hughes Co. WOC, Davenport, Ia. 400 and 485 only. 1,000 mi. Pal- mer School of Chiropractic. Daily ex Sun. 10:55 am, time; 11, weather; 12 m, chimes; 2 pm, markets; 3:30. talk; 5:45 chimes, ex Wed; 6:30, sports; 7, concert; 10 pm, concert. Wed only. Sun, 9 am, chimes; 1:45 pm, 6, concert; 7, church services; 1, concert. Central. WOE, Akron, Ohio. 100 mi. Buckeye Badio Service Co. Mon, Wed, Fri, 7-8:15 pm, music, agriograms, sports. Sat, 4-4:30 pm, music, sports. Eastern. WOH, Indianaoplls, Ind. 1,000 mi. Hatfield Elec. Co. (Indianapolis Star.) Dally ex Sun. 10-11 am, music; 10:15, financial, markets; 1-2 pm, music; 1:20, mar- kets; 4-5 pm, music; 4:15, police notes; 4:50, sports. Mon. Wed. Sat, 8:30-10 pm. Concert. Central. WOI, Ames, Ia. 485 also. 200 mi. Iowa State College. Daily ex Sun, 9:30 am, 12:45 pm, 9:30, music, weather. Central. WOK, Pine Bluff, Ark. 485 also. 500 mi. Ark. light & Power Co. Tues, Fri, 9-10 pm, concert. Sun, 11-12 m, 7:30 pm, church services. Central. WOO, Philadelphia, Pa. 400 and 485 only. 500 mi. John Wanamaker. WOQ, Kansas City, Mo. 485 also. 1,000 mi. Western Radio Co. Mon, Tue, Wed. Thur, 9:45 am, 10:55. 11:30, 12:30 pm, 2, 7:30, time signals, reports, etc. Fri. 1:15 pm, sacred service. Sat, 8 pm. concert. Sun, 7 pm, concert. WOR, Newark, N. J. 400 only. 2,000 mi. L. Bamberger & Co. Daily ex Sun, 2:30-4 pm, 6:15-7, music, talks, Tues, Fri, 8-10, music, entertainment. East- ern. WOS, Jefferson City. Mo. 485 also. 1,500 mi. Mis- souri State Marketing Bureau. Dally ex Sun, first 15 min. of every hour from 8 am-g pm, markets. Daily, 5 pm, music, markets. Mon, Wed, Fri, 8-9:30 pm, concert. Central. WOV, Omaha, Neb. B. B. Howell. WOU, Omaha, Neb. Metropolitan Utilities Dist. WOZ, Bichmond. Ind. 485 also. 300 mi. Palladium Printing Co. Daily ex Sun, 12-12:25 pm, 4-5, 6:30-7, music, markets. Central. WPA, Ft. Worth. Tex. 485 also. 1.000 mi. Fort Worth Record. Daily ex Sun, 10:58-11 am, time, 2:30-3 pm, 6-6:30, 9-9:30. Sun, 3-3:30 pm, 9-9:30. Mon. 11-12 mid. Central. WPAA, Waco, Neb. Anderson & Webster Elec. Co. WPAB. State College, Pa. Pa. State College. WPAC, Okmulgee, Okla. Donaldson Radio Co. WPAD, Chicago, 111. 1,000 mi. W. A. Wieboldt & Co. Daily ex Sun, 12:30-1:30 pm, 6:30-7, music. Central. WPAF, Council Bluffs. Ia. Peterson's Radio Co. WPAG, Independence, Mo. Central Radio Co.. Inc. WPAH, Waupaca, Wis. Wisconsin Dept, of Markets. WPAJ, New Haven, Conn. Doolittle Radio Corp. WPAK, Fargo, N. D. North, Dakota Agricultural Col- lege. WPAL, Columbus, 0. Superior Radio & Tel. Equip. Co. WPAM, Topeka, Kans. Awerbach & Guettel. WPAP, Winchester, Ky. Theodore D. Phillips. WPAQ, Frostburg, Md. General Sales & Engineering Co. WPAR, Beloit, Kan. 50 mi. R. A. Ward. No definite WPAS, Amsterdam, N. Y. J. & M. Electric Co. WPAT, El Paso, Tex. Saint Patrick's Cathedral. WPAU, Moorhead, Minn. Concordia College. WPAV, Laurium, Mich. Tinetti & Sons. WPAW, Wilmington, Del. Radio Installation Co., Inc. WPAX. Thomasville. Ga. S-W Radio Co. WPE, Kansas City, Mo. 300 mi. Central Radio Co. Sun. 6-7 pm, church services. Central. WPG, New Lebanon, O. 485 also. 1,500 mi. Nushawg Poultry Farm. Daily ex Sun, 12-12:15 pm, news, 6- 6:30 pm, markets Mon, Fri, 8-9:45 pm, music, farm program. Central. WPI, Clearfield, Pa. Elec. Supply Co. WPM, Washington, D. C. 200 mi. Thos. J. Williams. Inc. (Washington Daily News.) Daily ex Sun. 12:30 pm, news. Mon, 8 pm, concert. Eastern. WPO, Memphis, Tenn. 100 mi. United Equip. Co. Daily, 7:15-8:15 pm. music. Central. WQAA, Parkesburg, Pa. 1.50O mi. Horace A. Beale, Jr. Daily. 10:30 pm. Eastern. WQAB, Springfield, Mo. Southwest Missouri Stato Teachers College. WQAC, Amarillo, Tex. E. B. Gish. WQAK, Dubuque. Ia, Appel-Higley Elec. Co. WQAL, Mattoon. 111. Cole County Tel. & Telg. Co. WQAP, Lincoln, Nobr. Am. Radio Co. WQAQ, Abilene, Tex. West Tex. Radio Co. WRAA, Houston, Tex. Rice Institute. (Continued on page 9) RADIO DIGEST ILLUSTRATED STATION SCHEDULES (Continued from page S) WRAM. Carthago, 111. Robert E. Comptoa ami Carthago WRAN. Waterloo, la. 100 ml. Black Hawk Elec- trical Co. Dully « Sun. 5 pm, 5:30, concert, news. Hon, Wed, Kri. B:80-9:I6 pm, concert. Sun, 11:15, church services. Central. WRAR. liavid City. Nebr. Jacob Carl Thomas. WRAU. AmariUo. Tex. Dally News. _ , WRAY. Scraiiton. Pa. 4S5 also. 100 ml. Radio Sales Corp. Dally 61 Sun. 11 am. music; 12 m; reports; 3:30-5:30 pm. reports, music; 7:8:30. bedtime stories, music. Sun. 3 pm, chapel. Eastern. WRK, Hamilton, O. 1.000 ml. Doron Bros. Eleo. Co. Tues, Thur. 9-10:30 pm. music, lecture. Sun, 10:80 am. church service. Central. WRL. Schenectady. N. Y. Union Collogo Radio Club. WRM, Vrbajia. I1L 300 mi. Unly. of HI. Mon, Thur, 8:30-8:50 pm, 9-9:30 news, talks, music Cen- tral. WRP. Camden, N. J. 250 ml. Federal Inst, of Radio Tel«. Daily ex Sat, Sun. 10-10:45 pm, music, news, agriograms. Eastern. WRR. Dallas. Tex. 485 also. 200 ml. City of Dallas. Daily ex Sun. 12-12:30 pm. weather: 3-3:30, sports, markets, news; 7-7:15, police news; 8-8:30, music. Sun, 11 am, church service; 7-8 pm. police news, church service. Central. _ WRW. Tarrytown. N. Y. 1.000 mL Tarrytown Radio & Research Laboratory. Daily ex Sun. 10:30-12 m. Mon. Thur. Sat, 6:15-7 pm. 7:30-8:30. 10:30-12 pm. Sun. 1-3 pm. Eastern. WSAJ. Grove City. Pa. Grove City College. WSAS. Lincoln, Nebr. 485 also. 700 mi. Nebr. Dept. of Agrl. Daily ex Sat pm and Sun, 9:30 am, 9:45, 10, 10:30. 10:45. 11. 11:30, 11:40, 11:50, 12 m. 1:15 pm, 1:30, 1:45. reports. WSAV. Houston. Tex. 300 mL C. W. Vick Radio Const'n. Co. Mon. Tues, Fri. 8-10 pm, concert, enter- tainment. CeutraL WSB, Atlanta. Go. 400 and 485 only. 1,500 ml. At- lanta Journal Dally ex Sun, 12-1 pm. music; 2:30, reports; 4-4:45 pm. music, reports; 5-6 pm, 7-8. 10:15-12 music. Sun, 10:45 am, 5-6 pm, 7:30-9, church services. Central. WSL. Utlca. N. Y. 500 mi. J. & M. Elec. Co. Dally ex Sat. Sun. 11-11:30 am, 2-2:30 pm. 3-3 :3U. 4-4:30. 5-5:30. music, news. Mon. Wed, 8-9 pm. Sat, 11- 11:30 am, 5-6 pm, 8-9. Sun, 10:30-12 m, 7:30-9 pm. Eastern. WSY, Birmingham. Ala. 2.000 mi. Alabama Power Co. Mon, Wed, Fri, 3-3:30 pm. 8-S:45, reports, con- cert. Sun, 11 am, 7:30 pm, church services. Cen- tral WTAC. Johnston, Pa. Perm Traffic Co. WTAU, Tecumseh, Neb. Ruegy Battery & Elec. Co. WTAW. College Station. Tex. Agricultural and Me- chanical College of Tex. WTG. Manhattan. Kan. 48S only. 75 mi. Kan. State Agrl. College. Daily ex Sun. 9:55 am, weather (code). Central. WTP, Bay City, Mich. 75 mi. Ra-Do Corp. Mon, Wed, Fri, 1:30-2 pm, reports, news; 6:30-7:30 pm, concert. Central. WW AC. Waco, Tex. 485 also. 200 mi. Sanger Bros. Daily ex Sun, 10 am, weather, 1:30 pm, music. Mon. Wed, Fri, 8:45 pm, music. Central. WWAD, Philadelphia, Pa. Wright & Wright. Inc. WWAX, Laredo, Tex. 150 mL Wormser Bros. Daily ex Sun, 4:30-5:30 pm, music. Mon, Sat, 8-9 pm, music. Central. WWB, Canton. 0. Daily News Printing Co. WW I. Dearborn, Mich. 200 ml. Ford Motor Co. Wed, 10-11 pm, music, lectures. Eastern. WW1, Detroit, Mich. 400 and 485 only. 1,500 ml. Evening News. Daily ex Sun, 9:30-9:40 am, household hints: 9:40-10:25, health talks; 10:25-10:30 am, weather; 11:55-12 m, time; 14:05-12:45 pm, music; 3-3:30 music; 3:30-3:35, weather; 3:35-4:15, markets: 5-6, sports; 7:30-10, entertainment. Sun, November 11, and every other week, 11 am, 4 pm, church services. Sun, fill in weeks, 2 pm, 7:30, church services, special Eastern. WWL. New Orleans. La. Loyola Univ. WWT, Buffalo. N. Y. 200 mi. McCarthy Bros. & Ford. Daily 3-4:30 pm. 7:30-9:30. Eastern. WWX, Washington. D. C. 1,160 only. 600 mi. Post Office Dept. Daily ex Sun, 10 am, weather; 10:30, markets. 12:30, 2:15, 3:30. markets, 5 pm, 7:30, markets; 9:45, weather. Eastern. WWZ, New York City. 200 mi. John Wanamaker. Daily ex Sun, 1:15-2:15 pm. Tues, 7:30-9 pm. Fri, 7:30-8:30 pm. Eastern. (Note. — This completes the station schedule list The first part will appear again next week.) Multiple Phone Connectors Dress fasteners make ideal devices for holding- the tips of phone cords, and sev- eral of them connected together in a block make a multiple holder. Turn up or saw out two circular disks from panel stock or battery jar sides, also make a ORESS SNAPS BETWEEN KOeOER DISCS. HOLES FOR. CLAMPING RUBBER DISCS TO CETHER- . wood base to mount the disks orr with the dress fasteners between them. The wire connecting to the fasteners is shown by the dotted lines. — Dr. T. D. Morgan, Rome, Ga. Horn Attachment An inexpensive attachment for a loud speaker may be made of an old leaky bulb used on a battery hydrometer. One may ATTACH TO END OF HORN CUT OFF HERE. INSERT PHONE. *_ be obtained from a garage or battery charging station. Cut out. the larger end and insert a receiver. The other end may be slipped over the end of the phonograph horn. — Knud Overgaard, Kimballtown, la. Use Little Effort to Wind Honeycomb Coil The satisfaction of proudly exhibiting the ordinary man's ability to make this or that as well or better than the "boughten article," is likely more pro- nounced in the Radio enthusiast than in any other hobby, and this article is to show how any kind of honeycomb coil may be made with very little trouble. First of all, determine the number of turns you want, as this matter is im- portant in selecting the size of wire to be used. Number 24 single cotton covered is about right for small inductances, and Number 28 S. C. C. for large ones. If possible, secure a heavy cardboard box two inches in diameter and cut it into rings one inch across in the manner of a napkin ring. The start is made under auspicious circumstances. However, such a tube is not always at hand. Then take a piece of soft pine and work it down to a diameter of about 1% inches, cut some heavy wrapping paper into long strips, the width being about equal to the length of the round pine stick, and with well- strained shellac coat one side of the paper, wrap it neatly around the stick until you have built up a tube of 2 inches diameter. Some oil or waxed paper wrapped around the stick before laying on the paper tube will greatly aid in slipping the coil off the tube when the winding is completed. After the tube is thoroughly dry, and has had another one or two coats of shel- lac, it is ready to cut into rings. Don't throw the stick away; it will be needed again. Cut about two inches off one end of the round piece of wood, drill a hole through the center of the small piece, and take a nail just a trifle larger than the drill hole and drive it through the drill hole up to the head, which will leave about an inch of the point of the nail protruding. Take the longer piece of round pine and set it on end and drive the nail into it, in the center, if you can, but this is a matter of little moment. This is your winding form. The nail is used to hold it in the vise, or if you have loaned that out, fasten it on the work bench. This allows one end to be revolved for your winding while the other end holds your work up- right and in front of you. Take a strip of paper and measure around the stick, marking the exact diam- eter on this strip, and mark off 24 equal spaces on it, numbering each mark from 1 to 24, so that if there were a line num- ber 25 it would just fall under the lap of number 1. Now, in a straight row all the way around the stick, drive a pin through the center of each mark, into the wood as far as you can drive it without its bending. If you bend a pin pull it out and dp bet- ter on the next one, as a bent pin will interfere with your winding. After one row of pins has been put around the stick, slip one of the rings over the end of your stick down to where the row of pins will stop it, and then drive another row of pins around the stick, each pin to be as close to the end of the ring as possible, so that the ring will not slip. Now, if you have the 24 spaces marked and numbered so that the numbers are visible to you, you are ready to begin winding. Put the end of the stick that holds the work in the vise, hold your spool of wire in one hand, with a few inches of wire sticking out, wrap it around the pins 9 and 10, thence to 21 and 22, going laterally across, then back again to and around 8 and 9, then over and across to 20 and 21, then to 7 and 8, 19 and 20, 6 and 7, and so on, until you have returned to where you started from, which in the few minutes you have been at work, gives you exactly 24 turns. At this point, espe- cially if making a large number of wind- ings, it would be well to make a tally sheet, so that if interrupted, you have not lost count. After the desired number of turns has been made, it is well to cut the wire a few inches away from the coil, secure the loose end with a weight, or get Willie to hold it, while you drop a small gob of hot sealing wax on it to hold it in place. Now, the coil is ready to apply a fixitive or coat of something to hold it rigid. Shellac can be used for this, putting on only enough to hold it in shape, but collodion is probably better for that purpose, and a couple of ounces will paint a good-sized coil, always remembering that collodion is very inflammable and will dry in a few minutes. After this is dry, remove one of the rows of pins and slip the completed coil off the form and mark the coil inside with the size wire, date, and more important, the number of turns. In starting your winding, especially a large coil, it is well to take a sheet of paper and map off each zigzag of your winding so you won't lose your place, as, for example, 9-10 to 21-22 8- 9 to 20-21 • 7- 8 to 19-20, etc, When you have reached 10-11 to 22-23, you are ready to go. The expense of constructing a multiple wire antenna may be reduced and its efficiency increased by placing one or two insulators in the rope connected to the bridle instead of inserting an insulator in each individual wire. R-A-D-I-O BUY HERE FOR LESS Radio Supplies purchased here are sold under a positive guarantee of satisfaction. We carry the largest new stock of first quality merchandise. Complete Parts for Reinartz Circuit Includes 1 7x18 Formica Panel, 1 Bakelite Socket, 1 How- ard Vernier Rheostat, 23 Plate Condenser, 11 Plate Con- denser, 3 Switch Levers, 2 Dozen Switch Points, 1 Reinartz Wound Coil, 1 Variable Grid Leak, 8 Binding Posts, 25 Feet Tinned Wire, 1 Base for Coil, 1 Mounting Base Board, and 1 Diagram to Construct This Set. Complete. ., $11.45 °try&n#. BALDWIN UNITS • • • $4.95 COMPLETE PARTS FOR REGENERATIVE SETS This includes 2 Variometers, 1 Coupler, 3 Dials, 1 Rheostat, 1 Cunningham Detector Tube, 1 Bakelite Socket, 1 Mahogany Cabinet, 7x18 Formica Panel, 6 Binding Posts. 1 Switch Lever, 12 Switch Points, 2 Stops and 1 Diagram to construct this set. Set is $1.95 VARIOCOUPLERS, $4.50 Value, Now $1.75 HONEYCOMB COILS 1,500 Turns $1.50 1,250 Turns 1.50 1,000 Turns 1.25 750 Turns $1.00 250 Turns 75c 150 Turns 60c 100 Turns 50c 75 Turns.. .^..r. 40c 50 Turns 40c 35 and 25 Turns 40c $8.50 Guaranteed 3,000 Ohm •head phones $3.65 RHEOSTATS 45c Sponge Rubber EAR CAPS, Pair 50c DIALS, 2, 3 and 3^ in...r.,. . . . . 25c EBB#8?£ TRANSFORMERS $4.50 VALUE, NOW $2.95 GREWOL DETECTORS $1.65 Signal Corps Super Sensitive Microphone Transmitters, $2.45 Solid Copper Aerial Wire, IE. mi . ,...«*»»»' ,fi.10e "60c 95c 100 ft. Spaghetti Tubing. yard ,..., Card Tip Plugs Lightning Arresters 2-Slide Tuning