Evening Star Newspaper, April 26, 1925, Page 31

RADID EQUIPMENT TOBE PUTONTRAIN Head Sets to Be Supplied to Passengers on Oriental Limited. Special Dispatch to The Star. s plan for ception on its transcontinen- tal train, the Oriental Limited, in- volves the elimination of the ublqui- tous loud speaker and the dissemina- tion of radio broadcasting only to passengers who may be interested, without disturbance to those patrons who may wish to read, play cards or otherwise amuse themselves without interference. Under this plan in- dividual head sets will be attached to each chair of the observation par- lor, and supplied to each compart- ment The Great ple; test of possibilities over its system, during which an Oriental Limited type of steel com- partment . observation car was equipped with all accessories and with two types of receiving equip- ment, one a super-heterodyne with in- terior loop, nd the other a commer- cial set of the types used by sea coast broadcasting stations to pick up SOS signals right under the of thelr own high-powered This set is equipped with antenna test, among other things, the purpose of determining effective receiving set ns existing alc Railway the prog of this car from St. Paul to the coast and Te- turn, practically every station of any size from Buffalo to Los Angeles was received clearly, and while the car was in the State of Washington it carried through a special program from the Seattle Times, broadcasting from the Olympie Hotel, which it ac- knowledged by wire and listened in as acknowledgments of telegrams were put on the air. During the day's Nort is just com- is the most under condit Northern During the Great | cvening experiences. No. 13: Recharging “A” Battery. Before taking steps to recharge the A" battery Smith was disposed to test the battery with the instruments which he had bought for that purpose. These, I told him, were not essential in determining a discharged battery, but that they were necessary in or- der to see that the battery is always up to par. Being a true radio fan, he had al- ready provided himself with a hydro. meter and a voltmeter. He almost seemed to enjoy the opportunity to use them. This pleasure, however, might have turned into definite dis- may had he proceeded as he planned, for T found him just on the point of testing the “A” battery with a del icat inexpensive voltmeter. “Wait!” I cautioned. “You'll ruin that instrument if you use it to test a storage battery.” “I don’t get that at all,” he said. “It will test all the way up to 45 volts and the storage battery is limited to six.” You're forgetting the amperage. You're using a big automobile bat tefy to operate the filaments of the tubes. That means 120 amperes. You'd ruin this little instrument in- stantly. The amperage of the ‘B' bat- | teries, the dry ones for the plate cir- {cuit, is nothing like this.” He still was puzzled “But Brown uses one of these small voltmeters to test his ‘A’ batteries,” he argued. That is because Brown uses dry cells for the ‘A’ batteries, each of which rates about 114 volts when new. Even so, I wager that if he has a cheap meter like this one he doesn't learn a thing from it when testing the ‘A’ batteries. He should have one with a combination scale thai the readings from zero to five can be seen. You'll need one of these yourself some of these days be- cause the meter you're now using won't tell you a thing about the ‘C’ battery. All of which proves that 2ood things are cheaper in the long run.” John Smith and His Radio BY FREDERICK C. RUSSELL Car owners throughout the world have fallowed John Smith in his dadiy motoring—and have benesfited thereby. Now he has taken up radio, and is willing that his fellow fans should be amused and profit by his Smith has @ faculty for “finding out things) so it will pay radio devotees to foliow Aim in The Sunday Star each week. THE SUNDAY STAR, WASHINGTON, D. 'C.,__'AP]"{IL"QG, 1925—PART 1. rused the radio advertisements and had seen a batter: harger operating from the house current which he felt he should buy. “Of course you need a charger,” T agreed. ‘“After we leave the battery at the service station I'll drive you around to one of the radio “Good enough. “But why have the battery recharged if I'm going to buy a charger?” “It's just a matter of efficiency,” I explained. ‘“The charger you select probably will be of the 2-ampere type, which means that it will charge the battery at the rate of two amperes an hour. This is very satisfactory for use with a set that does not con- sume at more than this rate, because all you have to do is run the charger about as long as you run the set. But when the battery is 'way down like this, you'll find it a genuine economy and satisfaction to have it charged at a much higher rate. The plates are probably sulphated, and to clear them up it is sometimes necessary to keep charging the battery even after it shows a specific gravity reading of 1,875. Many radio owners are not get- ting the best results from their sets fust because they let their storage batterles run 'way down before buy- ing a charger. You want to start with a clean slate.” With the charger definitelv decided upon, Smith then asked a few ques tions regarding its use. eedn't fear overcharging v," I answered to his first Just remember how you often drive all.day with your auto mobile generator charging the battery at @ rate varying from elght to four- teen or more amperes. See that you have distilled water up to within half inch of the tops of the plates of the cells and thep use the charger gen- erously. “Yes, it is perfectly safe to let it run during the night. Connect a dou ble pole double-throw switch so that you can switch the battery to the set or to the charger without fussing with wires. SIX STATIONS GIVEN CLASS A LICENSES Four Changes Announced in Rat- ing of Present Broadcasting Units by Officials. Six new broadeasting stations were added to the list of the’Department of Commerce this week. All of the six plants received class A licenses. In addition to receiving the new comers, the department authorized four changes, three of which put sta tions already on the air officially into class B, and the fourth transferred WEAY, the Iris Theater, Houston, Texas, from class C to class A. WEAY will use 500 watts on 270 meters. Three transfers to class B were WDWF, Cranston, R. T., 500 watts, 440.9 meters; WJAR, Providence, R. I., 500 watts, 9 meters,and WORD, Batavia, Tl 2,000 watts, 275 meters. Although 275 meters is mot recog nized as a class B wave length, the Batavia station expressed its willing ness to remain on that band provided it were permitted to jump to 2,000 watts. Department officials believe that the increased power on the A wave length will not cause serious in terference during the Summer. The six new class A stations are WJBD, Ashland, Wis., 100 watts, 233 meters; WFKB, Chicago, 100 watts, 217.3 meters; WIBC, La Salle, TIl., 100 watts, 234 meters; WCRBZ, Chicago Heights, 11l, 50 watts, 217.3 meters: KFWF, St. Louis, 250 watts, 214.2 meters, and WNARB, Boston, 100 watts, 250 meters. The latter station, WNARB, is expected to be a supple mentary station to WNAC, Boston, a class B plant. 1t is notable that on the list of new comers is none from the Pacific coast, which for weeks has not entered a new broadeaster. France Censors Radio. Radio communication in France will be subject to police supervision fol- lowing a recent order of the minister of the interior. A special service has been organized at the surete general (which corresponds to our Depart ment of Justice) whereby future air conversations and messages will be censored by the officials who will “listen in.” The reason given for this movenient is the possibility that the enemies of the country may use radio stations to spread harmful propagan PLANE’S RADIO SET HEARD 2,000 MILES Signals Sent on Short Wave Picked Up at 8t. Paul, Minn,, and Tampa, Fla. A distance of 2,000 miles was suc fully worked with a short-wave set in a Navy plane in flight during a recent test held at the Naval Air Station, Anacostia, D. C. Sig nals from the plane, u' Navy DI-4B type, were heard in 8t. Paul, Minn., and Tampa, Fla., but were not heard at stations” much nearer. was in communieation with the Naval Radio Research Laboratory at Belle vue, D. C.,, on a 20-meter wave length up to a distance of 60 miles, at which point signals from the plane were no longer heard, later reports telling of the reception with good audibility of the signals in St. Paul and Tampa This appears to be a pecullarity of transmitting sets using very short wave lengths. Sxperiments with this type of radio equipment by the Nayy during the past vear have shown that signals on wave lengths below 40 meters have what {5 known as a “jump-over” ef fect—that is, they travel only mod erate distances, then disappear for a distance varying from 300 to 700 miles, reappearing at distant points. The light-weight transmitter in the plane used only two receiving tubes and the reception of signals from the set 2,000 miles away is believed to be a record for heavier than aireraft radio equipment Receiving in the plane while in flight, using the 20-meter wave length, was possible only up to 40 miles, due to the excessive interference ex- perienced from the fgnition system of the engine. This is due that _each of the 24 sp the Liberty engine with plane is powered acted ting stations, sending out nals in bout the same of the radio set (20 meters). Like most spark stations, these signals are very broad and difficult to tune out Attempts are now being made to overcome this difficulty This development of high-frequency, short-wave radio equipment for use in afreraft in flight. is based largely on experiments that have been carried on for the past few months at the Naval Research Laboratory at Belle- k plugs of which the 15 transmit strong slg wave length C. The plane | the fact | NEW STUDIO TO HAVE NOVEL LIGHT EFFECTS| WJAZ to Mark Epoch in Radio Broadcasting Facilities When Work Is Completed. Distinctive developments in lighting s St effaots will play an important and un 1l part in WJAZ studio broadcast Ing from its new location in the Straus Building, Chicago. In 1923-4 the Zenith Radio Corpo tion owned and operated station W. at the Bdgewater Beach Hotael, Chi 1g0. This station was known o the entire radio world, and when Zenith | s0ld this station hundreds of thou sands of letters were received appeal- ing to WIAZ to come back on the air. Although the station was sold, the call letters were retained and the radio listening public will soon hear the fa millar WJAZ going out over the radio waves. These old listeners and a host of new. friends will again be able to hear the high-class, pleasing programs previous| associated with Zenith WJIAZ broadeasting. The new studio will mark an epoch in the construction of radio broadcast ing apparatus. The entire twenty third floor in the beautiful ne us Buliding will be utilized by the studio, ym and execu tive offices h corpor: The studio architectural furnishings will be in ish style, with Louis X1V period furniture.” Orlental rugs, beavy drapes and rich ries will further enhance the effect. Accous an experts have arranged interiors that the delicate pitch of the violin and the deep, resonant tones of the Fass viol will all be harmoniously per fect in their transmission. Dr. M. Luckiesh, director of Lighting Research Laboratory, the has been secured to plan and direct the indirect illumination for this studio. Dr. Luckiesch author of books | which are gen ceepted as au- | thoritative works on lighting, afong | them being the following: “Light and | Shade and Their Appiications, ual Illusions,” “Ultraviolet and “The Languagt of Color. | Austria Cuts Interest Rate. | VIENNA, April | officials discount rate hs | duced from 13 per cent. The banks h: | charges one-quarter 80 that trade I | will be made at cent annually | interest on saving: reduced to % j Austrian been re- to 11 per red their per cent, ass firms per » time the s has been cent lowy There are nearly of operations in watch 50 different kinds manufacturing a STORES, INC. Special Announcement il 2o R e o UL CORBY’S LARGE and BOND BREAD vue, D the Marine flying field at. Quantico, and the Naval Air St tion, Lakehurst, N. J. Experimental short-wave sets at these stations, op erated from the ground, have been able to nd signals heard in New Zealand, besides being able to receive the same distance. It is hoped that the adaptation of short-wave radio equipment of extreme light-weight will open up a new field for the use of radio in aircraft | That much settled, Smith procured the hydrometer and proceeded to test the storage battery. Here his experi- ence as a seasoned and conscientious car owner came in handy, for he knew how to take the specific gravity reading of the battery solution, the electrolyte, and knew that a recharge was in order when each cell lested s than 1,200. But then the ex- features of radio entered Te explained that he had pe- [HE HUBSPRIVG FioR COVERING SALF- %‘\Wf’%’?‘&?}%fi?’& AR ;;’/"5’.«6“&'&7“3 ¥ NN/ i awé« T ® 50c Weekly Payments 4 & '.%‘ge}u\\‘-m e g A Sale of Hundreds of Sanitary, Long-Wearing Congoleum and Neponset New Grass Rugs 50c Weekly Payments Specials in Imported Grass Rugs Sale of Seconds of GOLD SEAL Brand 9x12 Feet, Room Size, $3.98 6x9 Feet, Room Size, $2.49 36x72 Inches, for Halls, $1.49 6x9-Foot Congoleum Rugs, Seconds of $9.00 Grade. .. ...$4.69 7V5x9-Foot Congoleum Rugs, Seconds of $11.25 Grade. . .$6.89 9x12-Foot Congoleum Rugs, Seconds of $18.00 Grade..$10.95 27x54 Inches, Scatter Size, 49c 3x9-Ft. Gold Seal Congoleum Rugs...$2.49 24=In. Grass Runner, for halls, stairs, yd., 29c Genuine Crex Grass Rugs 1x9-Ft. Gold Seal Congoleum Rugs..$3.49 Just what you require to brighten up the reception hall. Attractive designs in blue, brown and green. Note the low Gold Seal Congoleum Rugs i 6x9Ft. 8x10Fe. 9xizF. 9x12 Feet, Special, $16.20 - $7.95 $10.95 $11.95 Heavy Basket Weave Fiber Rugs 9x10"2 Feet, Special, $14.25 9x9 Feet, Special, $12.38 Offered at a special low price. Shown in all the pop- ular Summer colorings. 6x9 Ft. 72x9 Feet, Special, $10.13 6x9 Feet, Special, $8.10 9xI12 Ft. 8YxI10Y; Ft. $9.95 1,000 Yards Nairn’s Inlaid $14.95 $13.95 9x12-Ft. Genuine Fiber Rugs Congoleum and Linoleum Neponset New Mosaic and Tile Patterns Designs stenciled on both sides. Colors are green, $KR.95 “Factory Seconds” through to the back. s blue and brown... Colonial Rag Rugs—Size 25x50 Inches o, “Facte For kitchens, 49C Square yard 6x9-Foot Size, Spe Quaint hit-and-miss designs. Plain border. Spe- 69C bathrooms, porches (AN A 2L stay at Cut Bank on Ea unday, ter services were received with rness from Denver, Colo. da. as groups of foreigners have used various means to spread reports det-| rimental to French finance and credit, which has reacted on the Bourse. 12c 1o Commencing Monday Morning ' A DGS STORE NEAR YOUR HOME No, you will have no trouble at- taching ‘the charger. The wire to be attached directly to the positive ter- minal of the storage battery, or In directly through the switch, will have a red covering. The battery’s posi tive pole is either marked Pos, P or plus, or is distinguished by a red circle.” Smith began to feel that his method of learning radio was becoming more clea Ordered to Active Duty. Maj. Edward D Warfare Sei has been ord: Department f trainin, and more pos circles to it Next Week, No. 14: The A B C of Bat- Anderson, Chemica! ice Reserve, of this city red to report at the War active duty ynder tive, but there were no | rrsse & 7 A R g ) VA A AT AN 8| .o ¢l CONGOLEUM Sweeper A Sweeper of merit. mahogany finish. Imitation 9192919 SRS Vi < &\ "9 28\ AP 9 %Y AN - O L Tt A, N TY AR T =5 NS SIS TR A s 50c a Week Pays for a Guaranteed Vacuum Sweeper 1f we mentioned the maker of this sweeper you would recognize it instantly. We are not permit- ted to do so, however, while mak- ing this low-price offer. Come in and let us demonstrate. $29.75 Liberal Credit Is Yours at WASHINGIONS GREATEST FURNITURE STORE, .CASH = CREDIT Seventh and D Streets N.W. &s V@V 7\ O Patterns go cial. TIdeal for bedside or bathroom. .. Sanitary and serv- iceable. Sq. Yd. 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