Evening Star Newspaper, November 20, 1927, Page 36

WORLD RADIO PACT NEARS COMPLETION 79 Nations Expected to Rati- fy Treaty Regulating In- ternational Uses. to adjournment liotelegraph reprosents the fruit of s of on the 1 resentatives gathe world vention the rules n in erder to wor prevailing confusion tional vadi nee radio waves do of the new tre is appirer and shore stations of every land, primary users of r are to be erned by a strict code, to which every country must adhere under interna tional law that Wlly becomes the law of the i convention X replaces tho 1912, the last radio. uses of don convention international t Radio Bands Allocated. Undoubtedly, the most important rccomplishment of the confer- the allocation of wave bands various radio serviea ence to the aircraft and experimental will operate under a frequencies. hereaf! hedule of . National tions ean deviate from quencies only when it is a that no interference on interr ehannels will result. The American listener has had his present program band retained Furopean listeners have heen : virtually the broadeasting ban wanted. Most of ‘the services obtain- ing all .of the waves from 10 to 60.- 000 kilocyeles (30,000 to 5 meters) are the mobile (ship) and point-to-point services, for radio finds its portant use in communi atin ships at sea or from ships to shore, or between far-flung coun Amateurs Recognized. Tn the scale of allocations the ama- teurs obtained recognition in inter- national law for the first time. But they did not get all the channeis they wanted on account of opposition from countries, like Great Britain, havinz comparatively few amateurs. The realm in which they have dwelt, the short waves, has been corefully re- stricted for their future ope: ternationally, though they I Specifically, the amateurs will have exclusive use of the hands from 7,000 to 7,300 kilocycles (42.8 to 41 meters) and 14,000 to 14,100 kilocycles to 20.8 meters) and they will shar with mobile and fixed stations the bands from 1,715 to 2,900 kilocyeles 0 to 4,000 Below he *“pur- kilocycles (85 to 13.1 meters, now virtually gatory” of the radio spectrum, is an unreserved area in which amateurs and_experimenters ars left free to work as they pleas 210,000 Sets in Czechoslovakia. So greatly had radio interest in- ereased in Czechoslo ia that the number of licensed sets in recent years has grown from 5,000 to 210,000, the American vice consul at Prague, Frank P, 8. Glassey, has reported to the Department of State. One sta- tion is serving this audience, and two more are planned. DID YOU KNOW THA It is not possible to determine the number of stages of amplification in a set by counting the number of con- densers and the number of transform- ers between the audio frequency stages? There are, in radio, what are known as ‘“untuned stages."” These require no variable condensers for control. The efficiency of an aerial that is plugged into a floor socket depends to a large extent upon the nature of the wiring of the building? An aerial merely is an electrical pick-up device and, obviously, if the wiring through the house is run through metal pipes there will be an undesirable shielding effect. This explains why some per- =ons who have tried these condenser plugs have found them ineffective, while others have been quite enthusi- astic over the results obtained. ADTO. SERVITE o Siperlenced men who have the cquipment to fix your io at your home. Night or day. edy’s Radlo Service” Adams_205 and| NEVeY G grpsti when using '4’?2&%' i ; ' ) Ohms per Volt for B-Eliminator Operated Sets Your ar is untrustworthy. With- out some definite means of com- parison, how do you know that you are getting the best reception from your set? Spend a few minutes on your radio — with @ Weston Vol before broadcasting time begins. Note the difference in the power and quality of reception simply by making the necessa: indicated by your ‘‘Weston”. Ask your dealer for Model 489, 1,000 ohms per volt, for B-Elim instor or battery operated sets. Other D. C. and A. C. models for every type of radio, listed in Cir- cular J, and mailed upon request. WESTON ELECTRICAL INSTRUMENT CORPORATION Newark, N. J. WESTON | RADI NSTRUMENTS ‘-\T—vc—'.__{ DISTRIBUTOR NATIONAL ELECTRICAL SUPPLY CO. 1328-30 N. Y. Ave. Main 6800 THE SUNDAY STAR, WASHINGTON, e — — — — —— FRENCH RADIO INVENTOR VISITING UNITED STATES Count Guy du Bourg de Bozas Here for Polo and to Confer With Experts. Press. Count Guy du Bourg ed French inventor in the field of radio electricity and | of a distinguished and wealthy family of France, arrived from ris recently in search of polo play | iferences with American radio » | l dio laboratories of the | Confer- | tof the aerl 145 miles |long as a tiny lamp flares with ities and scientific many parts of the e hoth hen- | France and Ttaly s for his in- ored the Count de ventions. 307 “Wired Wireless” Popular. amg by “wired use in The and iz re-| popular. | o] are an- | Distribution of pr wirele has heen in I H e for the past venr ported o have proven very |"The installation expense is said very small, and the pre very re The Trouble Shooter Says: | 1 any of those who call on me for service were to see me (rying to drive | to their homes with my automobile |in reverse gear, they would think me {due for the padded cell. It is almost | unthinkable that 1 would do such a | | thing, and yet if 1 did it would be no | | more ‘absurd than some of the things | | which I note them doing with their | | rtadio sets. | | "When they are tryinz to find trou- ( ble they go about it backwards, is, they vt with the and work back and more or | through the set to the varic tits until they come to the ae The proper place, of course, art with the ae | the ground, takin en route. The trouble with hackwards is that any radio set is =o designed that whatever comes in over the botfom of the picture shows the schematic cley + proposed by Mr. Jenkins for the guidance of air 1 semi-circul fated energy i amete ations would he about 25 miles apart. Other di: ams show vertical antennae at cach transn g station d the ¢ n the plane, with lamp which assures the pilot that he is on the course. | RADIO-BLAZED AIR HIGHWAYS | OVER LAND AIM OF INVENTOR i i v Hitio it | troubles is amplified throug whole outfit. You've got to start at the bottom of it, and in his case the bottom is the top. 3 " Then there is another angle to it. air trails of the future, to guide speed- | ot PPt SEREEE FIINYTOK Tike & | Suppose, for instance, the radioist is ing planes through fog and stormand | string of beads laid zig-zag over the | trying to find out some trouble in the around mountain; he radio beacon | landscape, Jenkins says. They are in-| ‘B eliminator. Suppose aisq i e hs I Jed = iathrd trom thE CAliE | EXDEGRIVE, (chating Sio S;move) than ithe || ere Hiafnb ftrouble ftitere nd s L fornla const to Hawall. This stralgh | Present arc light “windmill tower” |f URKeFIEE WIS Che (TS ITIC U8 Dath, however, cannot well be used | beicons which they replace succ R e Tat Fe acpiles oo ek over land on account of the many de-| [ully in fozsy weather. L Tt 1 Dl or PBEIHY. - Mt ol tours in mountainous country. | R | et R tampers Witk ile shy. A virtual aerial roadway, penetrat-| Among construction projects of a | adjustment on the detector lead. ing Ylinding storm and cireling high | rajlway company i China are a print- | Instead of finding out the trouble, he peaks, 1s oned now by C. Francis | ing plant, a steel garage, three schools, | is putting trouble into the set and | Jenkins, Washington inventor. The |an gutomatic telephone station and a | making it just that much more diffi- | aviator would be sure of his path Sultith HovenWHa L P | The diagram at through fs By the Associated Press ) be used in either direction simultane- v Radio today is expected to blaze the | OUSly. he new automatic transmitter sta- <0 | hospital. "THE NEW ELECTRIC | ATWATER KENT Model 36 IS HERE No Batteries—No Eliminators—No Worries Plug in like you would an Electric Toaster and forget everything except PERFECT QUALITY of reception. $1 7650 compLeTE Including Set, Tubes, Model E Speaker, Installation, etc. . CONVENIENT TERMS : Call MAIN 906 and Arrange for a FREE TRIAL IN YOUR HOME MONARCH RADIO SHOP 18th and L Sts. N.W. ant energy, which has been transmit- | ted by radio stations at short intervals on the route being flown. Radio bea- | cons at present utilize sound signals, but Mr. lieves a pilot will find it easier watch light signals, which take less | attention. Each radio transmitter used in Mr. § Jenkins' system is a_short-wa: { power automatic station, and has di- | {4 rectional characteristics, making a | channel in which the pilot flies with certainty. A little light on the instru- | ment board burns brightly while the | plane is in the channel and dims as | the plane deviates from its course. Navigation of airplanes at present, Mr. Jenkins says, depends mainly on a sight of the ground over which the pilot is flying. Flying by night is hazardous in foggy weather, because the pilot must fly dangerously low for sight of guiding objects, The prin- cipal aim of his invention is to per- mit pilots to avoid possible crashes by | flying well over obstructions. Ik This plan, Jenkins believes, Is more | satisfactory for the sinuous land | routes from field to field than the di- | rectional radio beam stations recently set up at San Francisco and Honolulu. Objections to long straight beams as | land guides are avoided by breaking up the course into short sections, which can be turned readily and can How much do you spend on radio power? =) I R, i3 i = = ! This new-type “B” battery will give you better reception at less expense on any loud speaker set, HECK back over the past year and see how much it has cost you for power to run your radio. Then put Ray-O-Vac batteries in your set. At the end of the year you will find that you have spent much less on radio power than you ever spent before . . . for these batteries have remarkably long life. You will soon notice also how much better reception you are get- ting . . . because Ray-O-Vac bat- teries deliver non-pulsating direct current, with uniform voltage. Smooth, even amplification of every radio wave naturally results, You can buy Ray-O-Vac batteries from any leading dealer in radio supplies. Ask for them by name. FRENCH BATTERY COMPANY MADISON, WISCONSIN Also makers of Ray-O-Vac “A" and “C" batteries, Rey-O-Vac flashlights and batteries end Ray-O-Vac ignition batteries RADIO IS BETTER WITH BATTERY POWER NOVEMBER 20. 1927—PART 1. 16,926 AMATEUR STATIONS IN U. S. D. C. I Returns' to Radio l | l | Increase of 2,000 Noted in First‘.’,,,,, AHe b ot | Report of Radio Division of | Commerce Department. The vision mere vor wenruary vepori of the Radio i the Department wf made a separate entity by ronr the bu 26 last upon cstablisnment of the ¥ leral Radio Commission, has Just hecn submitted to Secretary ¢ by W. D, Terrell, chiet. < the fiseal year ended June the number of amateur trans stations increased from 14, iy first lengths of Much eredit is < for th siven ti r contribution to th lort-wave transmis. e also commendad rindered fol hurricane and flood when, in_some ar providw the o ommunication with the adio test cars of the en greatly improved by of additional equipment v possible determine the field st of transmitting stations at distant points operating on wave ler between and 600 met n wiil be |k in the Gener Who listener b and it i W‘ i . R . . nths 50 Commission Insists | mitocn ncies of stat 5 operating on \\‘l\yw‘l-":n:l!l.‘.fll::n.l 50 *o Stations ANNOUNCE e tor easuring trequenci below 50 meters. Thes t cars also Selves Frequently ave equipped for the examination of ion t applicants for radio operators’ lice At the end of the fiscal year <hips were equipped \ilities, as compared W ious year. A\ total of 9 o Commi again Is receiving complaints i1 broadeasting stations fail 1o themselves with sufli nd s calling the broadeasters to the quirement that they annouce call letters and location “as quently as practicable.” Frequent announcements, held the commission, are not only of assistance to the listener, larly one at a distance, but 1 to permit Federal o supervisors to keep check on jions to see that they adhere strictly to their assigned frequen- cies. The orders of the commission require announcements at least 15 minutes during operation, t where they would br Federal 0 wit 1 nounce spections « en- " |ing th i, re- v fre- WEAR SPECIAL SUITS. | WMAQ Trio Presented With Uni- forms by Fan Family. CHICAGO, (P).—Russell Prat, Ran som Sherman and Joe Rudolph, fun makers of Station WMAQ, Chicago, | now wear special suits of exotic hue when they broadeast their daily fea- | ture. a m 1 “potpourri.” | suits were donated by faiily at Kenosha, Wis. Electrify Your Radio! Trade in Your Old “A” Battery on an “ABOX.” The Only Elimi- nator That Eliminates Batteries. ABOX $32.50 Allowance on 2.50 Old Battery NET $30.00 installed | SMITH’S it 18th & Col. Road North 9928 4896 RADIO CONE SPEAKER The Spi'rit of Old Buccaneers! HE lure of treasure trove! All are vividly suggested in this full-rigged galleon. Its rich old Ivory finish and protecting ornamental frame are beautifully decorative. The large 17" free-edge conme—driven by a new super- powered armature type unit—absolutely guarantees you fullest volume, plus REAL TONE PURITY—the kind you've always wanted. Make your home the port for this fascinating rover of the seas! Ask to heer it— TODAY! at your dealers. Tower Mfg. Corp. 122 Brookline Ave. Bosten, Mass. A real ship model and grea: speaker all in one! COMPFLETE LINE OF TGWERS SPEAKERS ON DISPLAY 816 F St. NW. TOWERS SPEAKERS AND CONES SMITH’S 18th and Col. Rd. See QOur Display . S tre 1 of Navigation | ot which are oper- | st meters | division | the | banacen check the frequencies of stations | frequencies | 3 ler period in its existence. 51 3 in-| * ship radios was made dur- | ‘RADIO GOSSIP AND NEWS The bromidie remark that “radio still | personages who talk over the radio, it in ite infancy” happily is passing | shouid be kept in mind that most of i forgotten things. | them have more dist hed voices | This is true hecause even the mo than the loudspeakers would seem to Wl even the most e 1 radio spoils radio’s proponents must r < them in it the days of infancy » is & pecu parted, and that the art now in the case its way to lusty healthy liar same of vomer r of repro. s<chold’s re. has one of < mo s which most | trial destined fo |have found in their pathw in the first enough charlatans, veell me: . but well grounded 1ce felt in the nu days of its ning has'an alto. the vocal oadeaster operated t of which now so plainly i stride to success and influence i » national scheme of was too strong and too importa to be stifled by 1 { swaddlinz elothes, and the | finds its toothless days definitel hind and raitles rel same scrapheap wh theories, the same | ents to Be Pooled. pater things ts and that er 1 A v eross. wed by s o Assoc notions udo speci m the thr and while truly we said before, never in the < hasg it been so really g it is right now No more is radio in its infancy. No more is the time of radio’s first firm steps put off until the morrow which so often never comes. R with all the’ ch: marked its early days and now nitely has entered Today < to make available most into the b sedom in aper lic 1l eliminate much of the li it has it is beli . Har try © mohile pool o is done rrange d the plan at the recent the directors tn ¢ which aefi- | nother and a new- al per- He was Colby, It has moved into it with s accompiishments to jts credit, a long list of lessons learned through ardu onus experien nd millions of well wixhers in its train. That its success during this m er era_will he of an even more impre: character than that written during the flush and nov elty of « first association h public popularity seems soundly certain. ndid ~«d a Washington Bond Geddes, as exe- The latter’s duties as National Associat ded his newspaper ma [ cutive Baker | secr of Rr for the R | tion tihe ters in N - ity in charge of es Sa Voices Have a Sameness. nent headquar- Tn all fairness to those prominent a fan { The BREMER-TULLY COUNTERPHASE has been little advertised in the past because demand has exceeded supply. Satfsfiec! customers for six years have been telling their neighbors. “If it's a B-T it’s the best,” is what they say. Others may make greater claims, but B-T prove it in performance. B-T is greater today than ever, and stronger. There is $25,000,000 behind the COUNTER- PHASE distribution. B-T engineering ability has always kept ahead of competition. B-T circuits are protected by patents. Every B-T product has been a great success. After all—the manufacturer’s past record is your only real insurance! How else can you decide? Have you seen the 80-page B-T Booklet? Your copy is here. 2REMER-TULLY MFG. COMPANY 520-532 South Canal St., Chicqgo Exclusive Whoiesale Distributor DOUBLEDAY-HILL ELECTRIC CO. 715 12th St. N.W. Write for Franchise Main 4680 Authorized Bremer-Tully Dealer Come in and Let Us Demonstrate This Set Les Kohler Battery Service 3419 Conn. Ave. Clev. 844 AUTHORIZED Bremer-Tully Sales and Service ®anio SERVICE sruoio Tivoli Bldg., 3319 14th Open Lves. Col. 9946 gw»#naw444444444444444441 DOWNTGWN EXCLUSIVE DEALER Sets on Demcnstration F Street Store STAR RADIO CO. 1350 F St. 409 11th St. X % * * %* » * 2 208 8.8 8.8.8.2.2.2.2.2.2.8.8.8 2 2.18.8.2.2 4