Evening Star Newspaper, October 17, 1926, Page 43

NAVAL RADID HOLDS RECORD FOR POWER New Transmitter at San Diego Has Sending Range of 12,500 Miles. Special Dichateh to The Star, SAN DIEGO, Calif., October 16 A vacuum tube transmitter 80 tim s powerful the trans mitter in & broadeasting station has just heen installed in the Chollas Height« Naval Radio Station here. This sending vactum tube radiates 80,000 watts of electirieity and I& said hy naval officials 1o he the most pow- ertul tube transmitter in the world It is four times as powerful as any nther T'nited Siates naval sending sta tion. This broadeasiing device was not designed for telephone nse, hut will he employed for radio-telegraph com- munication, Dajng dots, dashes and spaces. at rate of 100 words a minute. as ordinary Masts 600 Feet High. = Heights i= a remote control station used by the Navy for sending purposes only, The messages leave antenna strung on three masix which £00 feet in height, form triangle 1,100 feet on each side. The “cross arms." or platforms. at the top of the maste are G0 feet long and contain a idge on which electricians may . The actual sending is done from Loma Naval Radio Station, distant acrose San Diego bay by air line. The Port Loma key worka the Chollas Heights sender while receiving is handied at Port Loma €ix tranan liters are employed in the station. The R0.000.watt tuhes replac 200.000.watl are transmitters, Under the new arrangement the station will he able to communieate with Ameri can chips in Any part of the world Auring the night, when the station has a sending range of 12,500 miles; during e day it can span the continent to Fastern points for ahout 3.000 miles, The xet is operated from an alter- nating current commercial power sup. plv. by means of aix 30-kilowatt recti fler tubes, which ean deliver up to 130 kilowatts ar 15.000 v Inchuded is A 20,000-volt master oxcillator, which excites eight 20,000-volt amplifier The approximate antenna current i 300 amperes The significance of found in the decl clals connected with and operation that, If it proves eom- | pletely successful. as they prediet it will, tube transmitters will replace all | large are nemitters such ax are emplayed by the Navy at Washington, | D. C.; Honolulu and Cavite. Japan Also Has a Set, The Chollas Heights set is one of three built recently by an Ameriean company. A second was constructed for the Japanese government, like this in exsential deiaile, though differing in some minor points. It has been rhipped to Japan A third was built for use in South America, but it is re- ported lack of funde has cansed it to he stored at New York, where it had been sent for shipment. The 20.000-watt tube used at Chollas Heights i the largest vacunm tube vet constructed for commercial use. 1t is <o large and becomes <o hot un- der ordinary conditions that the cop- per plate nsed i water-cooled. Twen Trtwo volis of »Imvrlr!l\ re required e tuhns, 0 to 15,000 Che 11 miles and the this station is tion of radio offi it construction 'l'h plnu‘\ take hnm Transm The new 1 Chollax Ileizhts construcied in 1 $350.000. A1 1k siderahle discussion « cation of the siaton ng that it should he I side. T3 miles fawher Mexican horder. Tt is now luc A hill 10 miles from the conter Diego, with o view of hoth moeuntams and Pac The heavy towers are.capalte of withs hori- zontal Pt of nnds Amiatenr hronde fans <uffer n. | ierference from the €tation, accord ing 1o Nawy officers, even when in the immediate viefnity of the station, Among other interesting facts, 30| gallons of water arve reauired every | minnte 1o keep the tubes cool. The | pate transformer weighs 41y tons, énd the total weicht of the sct when | PAcked is AR,A00 ...-nmn PLINY JEWELL HEADS INVESTMENT BANKERS | - | Boston Man Elected President ncl Assnciation at Meeting in Quebec. Other Officers Chosen. By the A< Costs $30,000, itter cost $80.000 tion was originally cost of about | there was con- | erninz the lo. ne maintain 1ted at Rive nopth from the ted on fSan fie Cweean atrd Prowe Octoher was Pliny Jewell president of | Association session of wesi ervis, Chicago Robert R 1 elect tment Bankers America At the closi mecting heve vesterday nis elected were loel Spokane. Arthur H. Gillert Henry 11 Haves, New York H. Moulton. Los Angeies, and Thompkins, New York Alden 1. Little of Chicago, vy Samnel Price. Chica ca 1 divector: Arthur G Chicago, field secreiary. and M. Gordon, w),:.u,;.' reasurer McCOY UPHOLDS SARGENT Attorney Genernl Auu ted Right to Decide Finally on Paroles. Chief Justice McCoy of the District Supreme Court has xustained the claim of Attorne; W Sargent | that Congress has clothel bim with discretion in approving or disapp-oy ing the action of Federal parole bourds and that the courts huve no urisdic tion to review his nection with the granting Federal prisone; Ren ju H. Covell. a prisoner at Leavenworth, whose parole had heen recommended by a parole bhoard. brought suit for a mandamus to compel A'torney General Sargent to approve the finding and permit his release from prison Sargent Answered that he disap proved the decision of the board and that in so doing had exercised the dix cretion contained in et of Con gress providing for pare Federal prironers. United States Attorney Peyton Gordon represented Mr. Sar gent. while the prisoner had ux coun sel Attorneys Frederick Stohlman and Bertrand Emerson, jr. Counsel for Covell noted an appeal to the Court of Appeals. BRIDGE NOW TOO SLOW. ot assistant edu- | Davis, rank clion n e LONDON, October 16 ®) sens of Mavfair, back from thei tinental holiday. huve so had t - petites whetted by the casinos of France and Monte Carlo that they work. They have purchased priva bling outfits, and roulette or now take the place of bric afternoon and evening parties. thue far have heen limited to small amounts and the games indulged in \ml} by the wealthiest set. Pprineipal communities. I made to customers buvi Frank LaForge, interna Margaret Matzenauer, heard tonight by the radio audience th 'E HE SUNDAY STAR. WASHINGTON, and Mme. who will be ected stations. Kknown composer-pianist a Co. prima ugh WRC and 11 con RADIO GOSSIP AND NEWS A thorough one of the feature In the various irade schools operated | by the Navy, where thousands of men nnnually tralned for civilian trades. The underlying trades taught in the with those taugit by civilian schools in connection with the same trad The naval radio man must know the unding radio of the education in principles of the vy are identical {aame fundamental principles of radio ax thoroughly as men following sim- ‘dnc trades in eivil fife Much of tre practical work of the trade taught | in the Navy schools likewise fs| identical with the practical instruction | in mny vivilian trade school, but in the Navy every effort s made to familiarize the ‘man with the same | types of equipment and the same| types of jobs that he will find on hoard | ship. | in every trade school the equip-| ment used for the instruction of the men is the standard equipment of the | Navy ships in service. The men drilled in operation until they « send and receive at the rate of words per minute hey also udy the theory of radio nd learn to repatr and upkeep the same type of | radio equipment they will find_on ships and at land radio stations. The «chool training is followed by actual experience on vessels and at land stations, so that the men selecti the radio service soon hecome ex- perts in the fullest sense of the world. ave | n 20 Credit for the O1d Set. A movement 1o reeivers at a resson: been indorsed by 7 Western vadio dealers, ling to n report made by the Pacific Radio| Trade Assocfition. That there is goml reason to accept them is voiced hy 80 per cent of the members ‘o this nsso ciation, many of whom ass that ft ix heneficial to their busines: nd that come sets have dgnred in trade | eral times, * The sale of an old receiver | ix helieved th afd materially in creating | A market A new set, just as the sale of a crystal set often inspires the | purchaser to huy a tube receiver, or | perhaps a five-tuhe autfit., | cept used radio e trade-in value per cent of the uggestions as 1o the method of dis- posing of sets turned In as< part pay ment on new outfitx include ihe cre. ation of a central resale hurean i all those tice »of per hould he following or advocatine helleve that an allow cent of the resale n vaiu ndmitting that overhaniing ing ix often necessary hefore the can be resold. Due fo the fluct in prices of nearly all sets mam n thei it is pointed ont, resale values o owrews - it Rattine made or “no name atso difl ult to classify or apy Once started and hacked by lers of the Nation the t the establishment a poticy will aid the indu mater nd it is certain that fans and tenr set makers will co-operate readily, Wired Radio in St, An experiment intended Ag-carat blue-white «olitaire di mond ring, very fine and bril- linnt gem. Beautiful lady’s 18-kt white goid mounting, set 4 diamonds. An unusual barga ne-white dia- lity and work- manship; design, A real barg. rats less %% (or 4% caratls) perfect litaire diamond beautifel cut and Party leav mus? $865 ring, zem. seerifice, ! conrse, telephoné suhscribers of St. Paul with radio hroadeast programs picked up by a central receiving station is being carvied ont by the Tri-State Telephone and Telegriph Co. It is proposed to install lond speakers in the residences of the phone subscribers and offer them entertainment picked up hy a centrally locaged radio receiver, Officials of the company say that they do not plan to superimpose the programs on the regular telephone lines, but to utilize spare wirek for this purpe So far it has proven feasihle, is reported that less distortion and interference is experi- enced by the subscribers, who, of do not have to provide them- selves with radio receivers. On the other hand, it has ita disadvantages over dlo_since the recipients must he satisfied with what selections are sent them Radio Writers Meet. onal Association of Radio t last week in Chicago in with the Chicago Radio nd it The Writers me connection F rosition, he chief purpose of the association, nized during the National Radio Conference in Washington last year, is to prevent the publication of un. truthful articles relating to the radio industry. The nization helfeves there ix sufficient bona fide news rvegarding radio development, as well as material for feature articles, with- out the exazgeration or misstatement of fa Harry Le president of officers ave: Stephen Yorka vice president; honey. . Ihiladelphia, W illing, Mertha the asso of St. tion. L. Coles, Stewart treaxurer, New Yor Louis is Other New Ma- and . zen- |DEATH CLAIMS OFFICIAL OF SUPERIOR FOREST! Alve L. Richey Dies Here While Settling Affairs Before Gomg to Post on Gulf. 4 Alve L. Richey, 46 years old, - pervisor of Superior National Forest, . Minn., was found dead yesterday morning in his the Cosmos Club, where he was a guest. He had heen threatened with angina’ pectoris, His hody was removed to Emergency Hospital and thence to Speare’s nn- dertaking parl 1009 1 street, to await the arrival of relatives, Mr. Richey had recenily, heen ap- pointed district forest fnspedtor of the Gulf States. and had come to Wash- ington to wind up his affairs in ~on nection” with his last post. He was » native of Latonia, Ohio, and entered “*the Forest Ser: in 1911 as a range in the Havden National Forest, \V oming. He attended Colorado State University, and served in different western preserves In the Denver iis ct hefore his promotion to his as. znment at Ky survived by room at his wife and two carats, ahsolutely ..m . :ulll»lrp diamond ring, very fine cut and fiery gem. lady's hand. ng, studded with 8 diamonds and { sapphires. Must be sold at once. $490 Solid platinum bar pin set with 13 large, fine dinmonds, very fine quality “and workmanship, A real bargain. $125 Platinum diamond flexible bracelet. finest quality and work. manslh must he seen to ap- : cost originally sacrifice. $1 350 g KAHN OPTICAL CO. 617 Seventh Street N. W. Opposite Patent Office Between F and G Sts. erening experiences. No. 86: Clear as a Crystal. Smith had been trying a small crystal set to determine what advan- tages, if any. it offered over tubes, when he reached a conclusion regard- ing cla “1 will admit this “i's r‘flr‘(fllnl\ clear. Rut_ do you know why? “Phen,” after all.” A few moments later we were deep Into the mysteries of crystal detec- tors. Smith never bafore had realized | how puzzling such a simple thing | could be. “1 don't see how a crystal like this can alter the nature of electric enr- rent passing through it.” he re. 1 asked. 1 added, “It isn't so clear Neither does any 6ne else.” I ad- mitted. “There are a lot of good guesses, however, and it helps you o in general to know what the first place, vou should that there are two kinds of crystals. One is the adjustable tvpe requiring a ‘cat whisker’: the other is the fixed cryatal. Both are highly complicated in so far as the theory of their operation s concerned, but ngly simple in their actual operation. Yours is the ‘cat whisker’ L type, so perhaps we had better con- centrate on that, leaving the other know John Smlth and His Radlo BY FREDERICK C. RUSSELL Car owners throughout the world have followed John Smith in his daily motoring—and have henefited thereby. He also is a radio fan. and is arilling that his fellow fans should be amused and profit by his Smith has a faculty of “Anding out things.” so it 1l pay radia devotees to follow him in The Sunday Star cach w-cek. for a later date. “The fact that vou have to fool | around with the ‘cat whisker " until you find a point where the fine wire meeting a point on the crystal brings in reception best makes it plain you do net have to be very observant ta appreciate that the crystal i8 not uni form in its detective properties. Such cryatals are sald to POARESR A property known As ‘unilateral conductivity Current_can flow through in one di- rection better than in another. thermore, the wire in contact the crystal has much to do with the process of changing the current from the two-way to the one-way kind necessary for operation of the phones, Crystals Rectify. “The crystals of the second class rectify because they do not have high regard for Ohm's law. Varfations in applied voltages cause several oddi- ties in action, with the result that while ,such crystals change the in- coming current from radlo frequency to audio they do it in quite a differ- ent way. And before I forget it I should tell you that there are crysta that fall somewhat in both groups. o1 are usually oxides and . The one most frequentiy used for the ‘cat whisker’' business i lead sulphide and is popularly known as galena. Silicon, tellurium, zinc. ite and carborundum are all possible | s crystals for detection. Silicon and carborundum are used for the second | group where the contact is ||nl|Pl enough pressure to call the adfust- ment fixed. “Now let's see if I can give you a picture of the way the ‘cat whikke combined with galena works. If you | examine such a crystal, you will ‘see | that it Is covered with fine serrations and that they run in one direction only. You have noticed, perhaps, that vou get results only when you touch the ‘whisker’ against the saw-tooth edges or perhaps in one of the de- pressions on the crystal. {" "It it s so difficult to find a point on a crystal where it will work, you can readily appreciate that only a small cross-section of the crystal is heing used to conduct current when a correct adjustment is made. TRix s important. It has much to do with | the capacity of the cry: stal to change ! one kind of current into another. The theory iz that hecause this current at | radio frequency is confined to such a { small area of the crystal, the energy heing picked up by the aerial and I ground is wasted in the form of heat at the point where the ‘cat | | World's Greatest Cone Speaker Value direct-drive unit with eight connections to cone. Adjustable. Full 177 in diameter. Powerful EAYouR HAIR YOUR D. C. OCTOBER 17 whisker' touches the sensitive por- tion of the detector. The resistance of the sensitive portion of the crystal | is =0 high the current is wasted. | Two New Eff | Now if this were the only part of the process, the cerystal would simply | block off current and there wouldn't | be anything at all in the way of energy to operate the phones. The | fact that the sensitive, portion of the rystal and the end of the ‘eat whis. | chang the detector spots introduces two . new effects which are helieved to explain why a direct current is generated in the temperatures and that | | | | phone circuit. “When current passes through d similar metals, as hetween ‘cat whis ker' wire and the galena crystal, heat | may be generated or dissipated. And | if the various parts of the crystal are | at different temperatures an electrical current will be generated. This cur- | rent is direct. And, that is what yvou | need for operation of the phones. | “In other words, the crystal Kills | one kind of ‘the current, hut has to generate another. Of vourse the sec. | ond current follows the first enough | to carry the pulsations which repre- ! sent the variations in electrical vibra- the signals. crystal does not kill off all the lations of the alternating eurrent applied to it, but the direct current it creates i sufficiently powerful to | ont_the other. Aliogether . it'= all very simple. That this form of detactor fs cal Nothing could he clear Next week, No. 87; Problem. (Conyright. hy the T1llman Featurs Sarvice.) The Used Set Now hear your radio set with TELETONE Distributed By H. C. ROBERTS CO. 1926—PART 1. L. T. ALDEN WINS IN I.AWN CONTEST Takes First Prize Followmg W.R.| & E. Inspection Along Cabin John Car Line. | gones, 5519 Sherter place, while Mr. and Mrs. M. J. Cox, 5523 Sherfer place, won third_prize Mr. Sharpe announced awards, which consisted of ribbons, will be' made each year for the best lawns. He also said his company is going to give special recognition of window boxes, now displayed hy resi- dents on the section of Prospect avenue where the car line run: Prize winners at a_recent hortie: tural show conducted by the club were announced as follows: First prizes—Mrs. H. S. Mrs. Laura Stanford, Mrs, 1. that the T. Alden, 5711 Sherier place, was A h\-':p::: awarded first prize for having the |rer. Manuel Tralle. Mrs. Richard Cor- best kept lawn nlong the (abin John | rell. Mrs. F. C. Rittue. Mrs. F. H ear line by Melvin (. Sharpe, execu- | Lore. Mrs. R. H. Reid. Rayvmond Jun tive seerefary William F. Ham, | cal. Mre. R. K. Adams. Mrs, Emil president of the Washington Railway | Rloomquist. Mrs. W & FElectric at 2 meeting of the | Brewood. Mrs. W. F. Holtg Mra, Potomac les Garden and Land- | Ronald Thring, Mrs. Keigle, Mrs. R. F. Ay night. Second pri: Mancill, Mrs. Fred Amberger, R. E. rrded to Mr, and Mrs. John T, Stebbin tional AAAAAAAAWE CAN MAKE ANY RADIO SET heat varies in different | 816 F STREET N.W WASHINGTON’S MOST RELIABLE Open Evenings Get Your Tubes Ready for ‘the Good Fall Programs Your Tuhes MUST he at their heat. Ace vou 1f not. why not let us them p in the wonderful Post Reacti- """ We Test Them Free! 1 Tube 3 Tubes 35¢ $1 1f_sour tubes fail to respond v treatment we make no You risk nething. We 'make tubes like new or you pay us nothing. AMERICAN BRAND Straight Line Frequency - Condensers 0003 Balanced Amplifier LoudiSpeniter $5.95 Radiola I $19.50 Jewett Cone Speaker (Adjustable) $8.99 Gepuine Radio Corp. of Ame LOOPS $2.95 2,000-Mile Range $3.95 Reg. $1250 806 12th Si F. Jackson, A. H. | “IfIt’s Not Right—Bring It Back”’ [ Tratning School, Mrs. R. C. Lake. Mra R. D. Smith and Mrs. J. P. Cochran. Second prizes—Mrs. Lura Stanford [Ttour), Mrs. H. S. Sherfer. Mrs. J. A. Scherrer, Mrs. R. R. Rennett, Charles Summers, Mrs. E. C. Rittue, Mre. Keigle, Raymond Juncal. Mrs. R. D. Smith, Mrs. Charles Goude, Manuel Fraile, Mrs. Preston Goulder, Mrs. R. H. Reid, Mrs. §. Stebbins, Mrs. Frank Ernst, . F. Dement. M Fred Amberger, Mre. Bradley, N tional Training School. Mrs. R. €. Lake (two). Charles Reckeweg (1wo), Mrs. G. W. Hughes and R. E. Adams. Third prizes—Mrs. Lura Stanford | Mrs. George Williams 4|hr"‘) Charles | Summers. Mrs. 1. A two), Mre. E. C. Rittue. Mrs. Keigle, Mra. R. (. Lake, Mrs. Charles Goude, Mrs, R. H. Reid, Mrs. S. Stebhins. Mrs. Ronald Thring. Miss Martha Sherier, Mrs. F. C. Oxleym and Miss Maude Lewis. WORK HOUSE Open Evenings ic Model 60 5-Tube Set Reg. !fi'l h'lw in highly fin- ished mahogany cahinet 100-amp. Storage A Battery 6 Volts Fully charged; . hber case Apco $18.50 Noiseless A Bauery Chlrger $12.50 > The Crowning Adventure of Burgess Radio Batteries They flew over the North “Pole with Byrd N May 9, 1926, history was made ... American history ...World history ... undying history. . Lieut. Commander Byrd, in his fearless 1500-mile flight across the top of the world, adds another thrilling triumph to the long, proud list of American achievements. Radio went along, for radio has become vital to the lives and success of explorers and adventurers. Burgess Batteries wentalong, sharing the fate — sharing the hardships and the mander %ory of the expeditions of Com- yrd, the Detroit Arctic Expe di- tion, and Capt. Donald Machllan. It is eminently significant that in these glorious triumphs of American courage and American equipment where the test of men and their tools was the test of the survival of the fittest, that the standard products of the Burgess Battery Company were selected, used and “carried on” under extreme and unprecedented conditions. BURGESS BATTERY COMPANY GENERAL SALES OFFICE: CHICAGO Canadian Factories and Offices: Niagara Falls and Winnipeg IIlI f;m WHOLESALE DISTRIBUTORS BURGESS: BATTERIES National Electric Supply Co. 1328-1330 N. Y. Ave,, Daily use of this pure fragrant, antiseptic Talcum Powder helps to overcome heavy perspiration and is soothing and refreshing to theskin. | Soap the. Qintrent % and 0c. Taleum e, Seld here_Semp: Laders Cuticura Shlvhl Washington, D. C. ' A Fresh Supply of Phone Main 6800 - BURGESS BATTERIES Can Be Had at THE POST RADIO 816 F St. N.W.