Evening Star Newspaper, May 26, 1922, Page 24

xpert Advice on Radio No. 11.—How to Use Soldering Tools. BY A. HYATT VERRILL, Expert on Radio Technology. Every person who makes, uses or installs a radio apparatus should know how to use a soldering set, for soldering is a very important part of making wireless outfits. There are but three things necessary in order to solder. Firat, the soldering “iron” or soldering “copper”; second, the solder, which is a mixture of lead and tin, and, third, a flux of some sert. Many amateurs and beginners make & great mistake in using resin as & flux, for while resin will do_fairly well on brass, copper or tin, which is bright and clean, it is very unsatis- factory in electrical work. It is liable to form masses or film over the metal and act as an insulation. Prob- ably the best flux for all-around use is chloride of zinc and sal ammoniac. You can probably get this at the nearest tinsmith's or plumber's, but it is easily made and consists merely of bits of zinc dissolved in murfatic (hydrochloric) acid. Add sinc to the acid until no more is dissolved. Then add sal ammoniac in the proportions of two ounces of sal ammoniac to each quart of the chioride of zinc so- lution. When dissolying the zinc in the acid place the acid in a large jar and add the zinc slowly, or immerse an old battery zinc in the acid so that it will not fume and boil over. Do not get a small copper. These do not hold heat for any length of time, and just as fine work can be done with a sharply pointed large "OPper. he first step in preparing solder’ is to “tin” the soldering iron” or “copper.” and here is a good method of procedure. Heat the cop- per until it melts the solder readily upon touching the point of the cop- per to it, then brighten and clean the copper with a flat file. Rub it on some sal ammoniac, on a clean board, and then run it back and forth on the solder until it is brightly coated with a film of solder on all sides, near the tip. 1t at first vou do not succeed In getting a good coat of solder on the copper, heat it again. brighten it with the fils and repeat the rubbing with sal ammoniac and solder, or, brush on some of the flux solution and then rub it in the solder. To solder any metal you must have the parts to be soldered clean and bright. Then wet the part to be sol dered with the flux, using a stift brush or a stick with flattened end. Ha: the copper d hot, but never red hot, or you will have to tin it over again, rub it on the board with the sal ammoniac. Dip the point in the solder until a little to it and touch it té the pl soldered. If the parts are clean a the flux good, the solder will in- stantly spread from the copper and will adhere to the parts you wish Soldered. If the two parts to be joined are wires twisted together, you should hold the hot copper against them until the wires are heated and the -melted solder trates between the twists and o ings. With large or thick plec metal this will b for, if the parts cold, the will not hold firmly, or at all. ture, let the copper get slightly cool or to the point where the solder ad- heres to it in a thick pasty form. Then, when enough solder has been accumulated on the desired spot, heat the copper well and amooth oft neatly. You will, no doubt, have some trou- ble at first, for there is & little knack required in order to judge the tem- perature of the copper. This metal is best suited to various ki; sizes of work. but as br: per—which are the most metals in radio work—are the easiest of all-to solder, you will have a com paratively easy job—a little practice will make you perfect. If you wish to solder iron to cop- per or brass te iron, as a wire to an iron water or steam pipe, you will find some difficulty in getting the solder to adhere to the pipe or iron unless it is first “tinned.” To do this is by no means easy and it is best done by having the iron bright and clean and using pure muriatic acid instead of the regular flux; also by using a solder which is “hard” or contafns more tin than lead. If the iron is in such a position that you can heat it, you may tin it easily b: applying muriatic acid and a sheet of tinfoil, after which it may be soldered readily. For eoldering zinc, use a flux of chioride of zinc without the sal am moniac, while for aluminum you mu use a speclal solder, which may be purchased of dealers in automobile supplies and without any flux what- ever. (Copyright, 1922.) Tomorrow—*'Some Useful Hints." New Apparatus and Devices By Ralph Brown, Radio Engineers=—s=—cu=2l A RELAY FOR RECORDING RADIO SIGNALS. Every radio experimenter will recos- nize the value of a sensitive relay. The new enthusiasts will also realize the advantage of recording telegraph sig- nals which they may not be able to read at high speed, but which might be easily deciphered if printed upon a tape. This can be done when the relay is used with a recorder. The jeweler who desires to ring time signals on a glarga gong may do so by connecting his gong circuit direct to the relay. With fa suitable arrangement he can auto- Ematically set his master clock directly Efrom the incoming radio time signa The relay operates directly in serie: r in parallel with the head receivers £ the radio set. An amplifier is only ecessary with the receiver and re- ay when signals are below average intensity in the head receivers. The s. to a great extent. tone se- ective, and signals of equal intensity which cannot be readily differentiated ¥ the ear may be individually re- orded, providing a reasonable dif- erence in tone Irequency exists be- ween them. The relay is extremely sensit| eak signals, but at the same time is very ruzged and wilt withstand con- iderable abuse. It is a sound-oper- ted device. with no electrical or agnetic amplifving _circuits. 'small air jet inflates a rubber A ! dia hragm, on which a movable spring, contact rests. Adjacent to the jet is ‘a standard telepnone receiver, con- inected to the radio receiving set. An ncoming signal, audible .in the re- eiver, is conveyed to the air jet. jcausing it to flare. This allows the idiaphragm to deflate, bringing a bpr!nx contact fn touch with a fixed onta This closes a local circuit, which is in series with a six-volt bat- tery, and to which a tape recorder, bell, buzzer or ordinary telegraph sounder may be connected. When the | incoming signal ceases the air jet im- mediately returns the diaphragh to its original position and opens the local circuit. This process is repeated for each dot and dash of the incoming signals and perfectly and speedily re- produces them. The air pressure feed, which is supplied by a minia- ture blower, need only be given an inftial adjustment. It will function thereafter with no further adjust- ment. The additional uses to which such a relay may be put are numerous. A certain university uses it to flash time signals with a high-power scarchlight. It is certainly a decid- edly valuable addition to radio. ey JOIN RADIO ASSOCIATION. Over 500 Become Members of New Organization. More than 500 Washington radio en- thusiasts' have become members of the American Radio Association in the past week, tae national headquarters of the organization, located at 1403 H street northwest, announced today. “The number of ladies applying for membership is surprising,” said J. M. Cohen, secretary. Mr. Cohen said that organizers will be started out imnfediately to interest radio “bugs,” and predicted a large branch of the organization in this city. A_clubroom. which connects with the offices of the association, furnishes a place for gatherings to hear concerts and speeches by radio. MY NEW *RADIO ‘WONT work! T WONDER IF RALF CAN “TELL ME WHAT'S WRONG ? BY RADIO TODAY Complete Programs of Radio Broadcasting Stations. NAA—Naval Radio Station, Radio, Va. 10:30 a.m.—Meteorological report on 5,950 meters of arc transmitter. Noon and 10 p.m.—Time signal, fol- lowed by weather report and ship or- ders. 10:30 p.m.—Naval press news, wave length, 2,650 meters. WWX—FPost Office Department. 10 a.m.—Weather report for the Dis- trict of Columbia, Pennsylvania, Ohlo, Maryland, Virginia and West Vir- arketgram (fruit and on 1,100 meters. 30, 5 and 3:30 p.m.—C. W. Mar- ketgram telegrams on 1,980 meter: 5 p.m.—Wholesale dairy report 1,160 meters by radiophone. 0 and 8 p.m.—Market report on 1,160 meters by radiophone 9:50 p.m.—Weather report. WMU—Doubleday & HIll Electric Company (360 Meters). 4:30 to 5:30 p.m.—Base ball scores announced. “Norma.” soprano (Sel Uni); “Nocturne, _piano (Chopin) “One, Two, Three, Four” (Anon), Mr. Gallagher and Mr. Shean (Gallagher and Shean), “Caprice Creole” piano (Albeniz); “Poor Little Me,” fox-trot (Benny Davis ome Into the Gar- den, Maud,” tenor (Balfe); “Ballet of plano (Hadlev); (Rose-Friend), (Anon), “Andante” Appas. sionate,” plano (Soro); “Honey fox-trot (Donaldson-de Sylva) the Sapphire Sea” (Snyder), -Co With » Fan' i Moon o y Delig! “By Gones," fox-trot (Kortlander-Al- pert): “Melodie in F.” piano (Rubin- stein). Base ball scores announced. val Afr Station, Anacostia (412 Meters). 8 to 9 p.m.—Program of music. NOF—) WPM—Thomas J. Williams, Inc. (360 Meters). 12:30 p.m.—News items; reports on stolen automobiles. SYN—National Radio Institute (360 Meters). 6:30 to 7 p.m.—Radio spark code. 360 Meters). 8:50 p.m.—Instruction in radio. 9 p.m.—Concert. WVP—United States Signal Corps G WWJ—Detroit News (Eastern Stand- ard Time). :30 a.m.—Tonight dinner household hints (360 meters). 9:40 a.m.—Music (360 meters). 10:15 a.m.—Weather meters). 11:55 a and report €485 m.—United States Naval Ob- servatory time signals relayed by telegraph (360 meters). 12:05 p.m.—Music (360 meters). g P ‘Weather report (485 meters). :40 p.m.—Market quotations (360 meters). 5 p.m.—Complete sport world news (360 meters). :30 p.m.—Program of music by ridges, contralto; Lee results; Frank B White, Webster School Orchestra of! n | ment | New I DONT wiow! COME IN. AND WE'LL ASK HIM. NEXT THE I GOT THE WHIMWHAM FLIPPERFLAP AN’ THE BAMBAM CONNECTED WITH THE DODAD! Pontlae, !ednl Mary ’smm, mezzo soprano. University of Missousl, newspaper night. (360 meters.) ‘WGY—General Electric i Sokemeeniy, Ny (300 THeter: Eastern Standard Time). 0 p.m.—Stock quotations. 6 p.m.—Base ball scores; stock quo= tations: late news bulletins. 6:30 p.m.—"Alice in Wonderland 7:40 p.m.—“What the state is doin to restore crippled children to health. 7:45 p.m.—Concert program.—piano, violin and baritone solos and read- ing! “ 10:30 p.m.—Popular program by the Cnr‘p'et City Quartet of Amsterdam, N. Y. - KDKA—Westinghouse Pittaburgh (300 Meters—Eastern Standard Time). 9 to 9:15 a.m.—Music. 11:30 a.m. to noon.—Music. of all league innings. scores; theatrical weekly dress talk. p.m.—Popular concert. p.m.—Special news. govern- market report; summary of York Stock Exchange; weather report. 7 pm—"A Look Into the Futur exter S. Kimball, dean of tI College of Engineering of Corn University and president of the Amer- ican Society of Mechanical Engineers. 0 p.m.—Bedtime and Uncle Wiggly stories for children. 8 p.m.—A variety of classical Vo y Miss Clara Huhn, prano, ai ted by the Century Male Quartet of the Pittsburgh Chamber of Commerce; violin selections by Nathan Weinberg. Base ball scores. 9:55 to 10 p.m.—Arlington time sig- nals. 2:30 —Resul base ball games bi’ 6 p.m.—Base ball feature: 6:15 6:45 KYW-—Westinghouse, Chicage (380 Meters — Central _ Daylight-Saving Time—Same as Eastern Standard Time). 9:25 am.—Opening market quota- tions, Chicago Board of Trade. 10 a.m.—Market quotations at one- half-hour intervals until 1 p.m. 1:20 p.m.—Closing market quota- tions. 15 p.m.—News and market re- port. 3 pm—American and National League base ball team line-ups; pros. ress of games every half hour there- after until their close. 4:15 p.m.—News, final market and financial returns. 6:30 p.m.—New! financlal returns. 7:15 p.m.—Children's bedtime storle: |_8 to 9 pm—Program of music by Katherine Spring. soprano; Alice Lucas, contralto; Frank Morris, yoe- deler; Bertha Kribben, first violin; Ethel Murra cello; Amory Hunt, second violin; Dorothy Condit, violin. 9 pm. ws and sports. 9.05 p.m.—Special features as na- nounced by radio phone. WJZ—Westinghouse, Newark, N. J. (300 Meters—Eastern Daylight-Sav- ing Time—Deduct One Hour). § a.m—Agricultural reports and prices as released by New York, New Jersey and federal bur 10 a.m.—Program of music. 2.m.—Program of musics Noon—Agricultural report; er forecast: program of music. 1 p.m—Weather forecast; program of music. 2 p.m.—Shipping news; program of music. 3 p.m.—Base ball scores; program program final market and weath- i of music. 4 pm—Base ball scores; | of_music. p.m.—Base ball scores; of music. Trade-ln Value $37.50—No Money Down We have only 263 of these Beautiful, Sparkling Diamonds, in a great variety of 14 and 18 karat een and white gold mountings—for ladies and gentlemen. As an investment feature, we will allow you $37.50 AT ANY TIME as a trade-in payment on a larger diamond. Another thing—fér a short time only you can secure one on our special terms of NO MONEY DOWN AND $1'A WEEK, For the Girl Graduate —a Gruen W-ist Watch; 15- jewel. No extra charge for credit.. $25 $1 Weekly—Wear While You Pay 708 Seventh Street N.W. | ,N\ml ///4 /7 S AN Z = | ESTABLISHED 1888 of Square Dea! 84 Years 6 p.m.—Weather forecast; -agricul- tural reports; shipping news: program of music. 3 7 p.m an in the Moon Stories”; fln:l b‘n_s; Lllm“ by theaipes p.m.—Special concert by the Meyer Davis Bellevue-Stratford oreh r't,or Phlladelphia. . 10:52 to 11 pm.—Arlington time signals. 11:01 p.m.—Weather forecast. WGI—Medford, Hillside, Mass. (360 Meters—Da: lnl t-Saving Time—De- and music. $:30 p.m.—Music. 920 F Street old. manship. appreciate them. 920 F St No!' 1 CANY HEAR ATHING BUT A BUZZ, Buzz, BUZZING! WWEe W maker’s, New York (360 Meters—Daylight-Saving Time—De- duct One Hour). 1:40, 5:40 and 10:30 p.m.—Music and chilgren’s storis * 'POPE USES RADIO. What {s believed to be the fr: use of radio by the Vatican in tra: mitting an ofMcial message to Ameri- ca is a message received from His Pope Plus XI, through Mgr. papsl pro-secre. tary. of extraordinary ‘écclesiastical affairs, to Ja, A. Flaherty of Phil- ad supreme knight of the Knights of Columbus. The radio ‘message contains the full, formal ap- probation of Pope Pius of the Knights of Columbus $1,000,000 Amerjcan wel- fare work in Italy now operating un- der the auspices of the holy see and the explicit donation of Pontifical land to the Knights for their work. ASSIGNED TO COLLEGE. Capt. Edward E. Jackson, naval In- spector at Philadelphia, has been or- dered to take a course of instruction at the Newport Naval War College. —_— ORDERED TO BUREAU POST. Commander Miles A. Libbey has been detached from duty with the de- stroyer squadrons, Atlantic fleet, and assigned to. duty with the bureau of engineering, Navy Department. MEDICAL CORPS CHANGES. Transfers of Officers Include As- signments to Beed Hospital, Orders to medical officers of the Army assign Majs. John Dibble and Frank D. Francis and Capt. Herbert H. Price to the Walter Reed Genera Hospital, this city; Capt. John M Welch to the Army Medical School this city, and the following-name: to Carlisle barracks, Pa.: Capts Harold O. Brown, Leland E. Dashiell Otis L. Graham, Stanley G. Odum, Charles F. Snell, Alfred R. Thom ir.; Cornell O. Bailey, Thomas Calladine, jr; William D. Gill, Geor: P. McNeiil, jr., and Walter F. To\lc” 941 Penna. Ave. : : OPEN SATURDAY EVENINGS UNTIL 9 P.M. Stores All Over the Land TWO.-STORES e IN WASHINGTON 941 Pa. Bell’s “2&1” Summer Sale Starts Tomorrow EVERY SUIT IN BOTH STORES REDUCED Values from $22.50 to $37.50 at 3”.75‘ - $2|.75 $23.75 'fActual $15 Heavy Imported White Flannel Trousers, $7.90- g We make it a strict policy not te carry over merchandise—that’s one of the rea- sons that you get the very latest and newest styles—alwaye at both Bell Stores. Consequently we cut prices just as early in the season as we can—and make it so attractive to you to buy that we clear out our stock of clothing. You will find every late sport model in tweeds, mixtures and herringbones, as well as the conservative and dressy blues and grays. Regular sizes—talls, shorts and stouts in plenty—you can be fitted in just what you want—not just a few suits, but a great big stock—that’s the “why” of the sale so early—the stock is too big. - Strictly Hand-Tailored, Superior Grade PALM BEACH SILK MOHAIR OOL CLOTH SUITS All the newest shades—in every model for both young and Stouts, slims, stubs, regulars—sizes 32 to 50—fancy models and conservative models—1 button, 2 buttons, 3’ but- tons—single and doullc breasted. Every suit is hand- tailored to fit and wear, with piped seams and real work- None better made. Come and see these to o) RECISTERED _REQISTERED U.S BATEMT OCT SR THE GENUINE CLOTH MFD. BY GOGDALL WORSTED CO. The instant you see this label you that it's genuine Palm Beach. ell Clothes Shops Ave.