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About The Omaha morning bee. (Omaha [Neb.]) 1922-1927 | View Entire Issue (Jan. 24, 1925)
1NTHEWORLD OF RADIO^ Ship Experiment With Short Wave Messages Transmitted From San Francisco to Fiffel Tower. Short wove length wireless tele graphy Is now attracting much atten tion. Signor Marconi has announced that he expects to attain startling re sults in the very near future. The French government is also studying tlie question in connection with the Eiffel lower station. The French authorities have loaned to the Jacques Cartier, a French l.lne cargo carrier und training ship, a jj, .small transmitting station of 400 e 'Watts, with which the. ship's messages l5 have been transmitted direct from Sail Francisco to Eiffel tower on a Ha-meter wave length. Tbe ship has been able to receive Eiffel tower signals sent out on 111 meters, with a 400-watt transmitter similar to the one loaned to the Jacques Cartier, ' the receiving apparatus in lmtli cases consisting of a one-tube outfit. The Jacques Cartlar uses its 400 watt station to forwnrd directly to Taris weather messages received from Alaska. Japan and Russia. This saves considerable time and enables the Tarts weather Bureau to have in a f^w hours sufficient data to draw an accurate weather chart of all the northern hemisphere. The Tarts weather bureau and the Jacques Cartier work in close co operation with the United States weather bureau and with Maj. E. H. Bowie, a pioneer In that branch who has contributed very valuable Infor mation on the subject. Capt. Marcel Coyecque is in charge of the bureau aboard ship, of which A. M. Robert is the wireless chief. The radio as sistants are A. J. Seiaud, U. F. Bols sunade and U. A. Moilton. Difficulties From Bent Wire. Wire that has been bent is* apt to break If an attempt is* made Btrai<hten it out, asui even if it dofcs* liot break it will be w eak where I lie bend oeruiH or, due t*j rrys*talliza-, tion at this point, It may cause high resistance. Even Convict Ccts Europe. An inmate of the Rock view pen! tentiary, near Bellefont, Pa., "tuned in” radio station LUO, Rome, during ttie recent transatlantic tests. More than 30 stations in the United States were picked up by convict radio op , orators in one night. Radio Waves to Be Studied. An exhaustive study of what hap pens to radio waves after they leave the broadcasting stations Is to be made by the Moore School of Elec trical Engineering ot the University of Pennsylvania. Largest Loud Speaker. The largest radio reproducing in* mhument in the world is 11 1*2 feet high and its mahogany bell contains more than 2,500 individual pieces of wool. The aluminum base is larger! than an ordinary car wheel. * Copenhagen Broadcasting. ' . /The new Copenhagen broadcasting » „ station is testing out radio transmis * nV'Ti on 750 meters, and is also trans , *, mitting regular programs on 471 me-1 tfjvters on Sundays, Wednesdays and W * Thursdays. Police to Install Radio. ir Ths Burets Generals of Paris has x. recently been authorized to Install v radio receiving sets, and Is training r -some of Its men in ths use and opera E, tlon of wireless Instruments. y KFGiTIs Now WEMC. >' The Radio Llshthou.se. Berrien Springs, Mich., heretofore known as station KFGZ, recently had its rail letters changed to WEMC, significant of Emmanuel Missionary college. Dirt Reduces Volume. Because dust is composed of metal, £he volume of Hound in the receiver will be cut down if the inside of the .set is permitted to become dirty. To Improve Loud Speaker. Tones from a loud speaker can be Improved if the opening is facing a Winer of the room. The edge of the speaker should just miss the walls. The American Radio Relay league Is gathering statistics in 20 nations ir its survey of amateur radio pro* frees throughout the world. Never use an acid as flux in solder* fpg, ns the acid will attack the cop per in the wire and in a short time the set will not function correctly. ii ■=—— The Finest Radio Receiver In the World The FREED -EISEMANN NEUTRODYNE 4 and 5-Tube Sets, $169.50 and Up. Imtllltd la your home complete. Aerial extra. F.aiy payment! A. HOSPE CO. 1513 Dougins St. Antenna Selector Performs Wonders Sharpening Up Tuning of Reflexes Any tuning device used as an an tenna coupling unit on a reflpx set operated within a half a mile of broadcasting stations which will en able one to tune out these stations so effectively that it becomes almost necessary to search for them the same as distant stations certainly will find favor with fans having trouble in getting selectivity. It is well known that any receiv ing set not having the inherent quali ty of at least partial selectivity fore stalls any possibility of enjoyment of radio programs. This Is true particu larly in cities where conditions are exceptionally severe. Most any of the standard circuits will give satis factory results where these conditions do not obtain. In congested areas radio enthusl asts must be more careful in the se cult with regards to its coupling to the secondary or grid circuit, from the equivalent of one half to 1G turns tight or close coupling. This gives us considerable flexibility with what is usually a fixed or aperiodic pri mary, To bp able to vary at will in a most simple manner from a minimum to maximum number of turns is one of the most efficient and practical meth ods of obtaining real selectivity. No impairment of tonal qualities makes this method most desirable. The pros and cons of aperiodic pri maries have been discussed so many times that most experimenters are more or less familiar with them, and will at once appreciate the possi bilities of the selector, especially since its use is not confined to reflexes, but also may he used with radio fre four turns each, wound near the out side ends of the rotor. Ilnnhing L'p the Selector. The primary is connected in this manner: Hold the selector with the rotor shaft facing toward the front. From left to right we should have four turns wound about a quarter inch from the left hand edge, right over the secondary winding of 40 turns, with the inside or last turn connected through the rear rotor shaft to the outside winding of four turns on the rotor. The inside or No. 4 wire on ttie rotor should be joined (the winding on the rotor is one piece of wire) to tlie inside winding of the. remaining four turns arid the extreme (lid connected through the front rotor shaft to the Inside turn of the fourth part of the primary winding. If built piuperly we should have a that there Is an additional control in the primary circuit which will ef fect great selectivity. More volume will he had with this method because of the larger amount of energy picked up by the aerial and inductively transmitted to (he grid of the first tube through the secondary. A loop or Indoor aerial is only a substitute for an outside aerial and consequently does not pick up quite so much energy. With Special Sets. Iri attaching this selector to certain other types of reflex sets It Is only necessary to connect the secondary winding lo the grid and through the secondary of the ief|exed audio trans former filament of the first tube with the tuning condenser shunted across the secondary. The antenna and ‘ 1-- ' ' In the event that this small con denser is not going to be used, con nect one end to secondary winding of the oelector to the grid of the first tube ami the remaining end to the grid of the reflexed audio transform er in the usual manner. Figure 1 shows the entire circuit using the selector. The Complete Circuit. The circuit shown in Figure 2 is by no means new; blit it certainly Is an efficient one. In volume it will equal most three tube regenerative sets and will bring In plenty of distance 01^ the loud speaker. It is easy and simple to operate, having only one main con trol, vet tune* very sharply. The selectivity obtainable Is ideal for city receiving. The “C" battery, which has been incorporated In this diagram will be appreciated by many. It is an iu lerilun of receivers. Refb-x receivers, notwithstanding their splendid vol ume. have suffered much because of their poor selectivity. In many Instances where a set that has been designed primarily for loop reception and Is used with an out side aerial there is a noticeable In crease in volume with proportionate decrease of selectivity. In this case, unless an efficient antenna coupling unit is employed it might be just as well to stick to the loop. The prob lem resolves itself into using some type of antenna tuning nr coupling unit that will provide maximum vol ume with the degree of selectivity originally intended. Furthermore, it is not only desirable but really neces sary that the device be of such a nature that Its use does not Involve complicated changes in existing cir cuits and that it can be attached very easily. IJke Changing Antenna. We know that the coupling or re lationship between the antenna sys tern of a circuit and tlie grid or sec ondary circuit must necessarily lie in creased as the wave lenglh Is in creased, in order that the energy or current in the secondary system be at maximum value. Again, It can be demonstrated that the relationship or coupling between these two circuits he reduced w lien great selectivity is de sired. This gives us our working basis for Ihe selective tuning unit, or "selector,” which Is to be de scribed. An easily understood analogy dem onstratlng the above paragraph may he had from the popular regenera tive three-circuit tuner, especially when It in being used near a power ful broadcasting station. Suppose we are listening to WAEF, operating at 492 meters, the set being operated at maximum or near maximum volume. When we wish to tune to a local sta tion on a lower wave lenglh and use only the secondary tuning condenser to accomplish this, we find that the set will begin to squeal. For this lower wave length We find that it is necessary to readjust our regenera tive control. In other words, we change the degrea of regenrratlve coupling for the various stations operating on different wave lengths. Ill a reflex set we find that our seler tlvity would be increased if we could efllclently change the degree of coup ling for the different wave lengths and not sacrifice sny volume. As already mentioned, selectivity at the expense of volume is not the object. Sharpens fp KeHetes. A selector has been developed which can readily be made part of any re flex circuit and Improve its selec tlvity to a remarkable degree. it can also be used with advantage on reflex sets designed for loop rerep tion, ns well as many other 1ypes of circuits. The use of this selector per mits the control of the primary clr quency ami regenerative circuits or in fact, wherever a selective antenna tuner is desired. Another point in it a favor is that no important changes are necessary to incorporate it in a receiving set. Details of This l nit. Roughly speaking, the selector con sists of a secondary winding of about 40 turns with a primary of IK turns, wound in such a manner that one-half the turns of the primary are fixed on the outside of the secondary while the temaining half of the primary rotates within the secondary. While this may sound like something extremely com plicated, it is comparatively simple to make. It becomes difficult only when one tries to make it after the fashion of low loss coils, because mechanical support of some kind is ah. ost an absolute necessity. However. 1t will repay those w’ho have the patience to make one in a low loss type. If an old variometer Is handy, strip off all the wires and on the stator wind 40 turns of No. 22 or No. 24 wire. Right over this wind four turns about one-quarter Inch from the outside edge, III the same dire» tion as the turns on the secondary and four turns on the opposite edge, making eight turns of tile primary wound in two sections of four turns each right on top of the secondary. Leave enough wire on the ends of the inside turns of the primary wind ings so that they may l»e connected to the remaining part of the primary which is to he wound on the rotor of the variometer in the same fashion as the primary was placed on the sec ondary—namely, in two serf Ions of II--. primary winding which constats of four turns wound over the secondary, connected In series with ths rotor windings, the remaining end of which Is connected to the other four tarn winding over the secondary, giving us In effect a primary wound In vari ometer fashion. To adapt this tuner to popular re flex models where the use of an out Fig. 1. New roil which sharpens tuning. side aerial Is desired It Is only BP' es siiiy to connect the two secondary posts to the set In the same manner as the loop Is ordinarily connected The condenser which was used to tune to loop will control the second ary. The antenna and grntind con nections nr* made to the primary In the usual way. Tuning is accom plished In exactly the same Planner a* heretofore', with the exception ground are connected as usual to the primary. In still another reflex it i# a hit more difficult to connect be cause of the fact that the secondary of the present tuning unit is tapped so as to allow neutralization of the ieflexed tube. If the variable selector be tapped at a point about two-thirds from the be ginning of the secondary winding the unit may be connected exactly as is the present tuner. T'nless this be done the use of the neutralizing small capacity condenser will be to no avail. Sermo'n Over Radio Boon in Batl Weather Holyoke. Mass., Jan. 9. — Even though some pastors are averse to having Sunday morning church serv ices broadcast because of the fact that many will stay away from the churches, one cannot deny that in cases of stormy weather broadcasting the services accomplishes one of the main objects of church teaching, namely, to make better men and women of us. This Is true because the sermons reach those who are confined to their home# by reason of the weather, and the lessons are so driven home. A splendid evidence that such is the case is to be had in a letter received recently by West inghous* station WBZ from a listener in th.s city: ‘ Yesterday we were 'shut-ins tem porarily. Hut we went to church \ ia radio. And we renlibed what a really fin* thing WBZ is doing in broad casting church services on Sunday mornings.” [expensive set and can be readily con *.rucied of the following part*: 1 variable selector. 1 .0(105 mfd. variable condenser. 1 midget condense! 2 20 or 3o-ohm rheostats. 2 Jacks, 1 open circ uit and 1 duuble circuit. 1 reflex radio freqnency trans former. 1 audio frequency transformer, high ratio. 1 audio frequency transformer, low ratio. 2 sockets. 1 crystal detector 2 .001 fixed condensers. 1 .00025 fixed condenser. 1 .0005 fixed condenser. 1 7x1 ^ panel and baseboard. Energy i>f Aerial*. A loop aerial picks up the least amount of energy of all the aerials. An in^or aerial about 20 feet long and of one wire will pick tip more than a loop while on outdoor aerial will gather more than the other two. and a long aerial more than a short one; but the ping one also picks up other disturbances which are objec t humble. HroaJiU'ting in Stwtlrn. The Ahth bolagc-t Radiol junst, which holds the broadcasting monopoly in Sweden, will take over t lie stations »t Stockholm and Gothenburg on January 1. This organization plans to Improve programs and will do a certain amount of broadcasting dally. . Where Shall We Go Tonight? What far distant city shall we visit tonight? Shall it be #_* New York, San Francisco, Winnipeg or Atlanta? You may Dr MaeMilUn be immediately transported to the city of your choice. You may search out the finest entertainment there. Radio puts "hhp° fj^wppk^of you in contact with wonderful programs of music, lectures, February. ^ t£e sermons, world news, etc. zenith exclusively Take your choice of either of the proved radio receivers °j] ^ ^rther11 ox shown below. Both have demonstrated that for long distance, quality reception, there is nothing finer. * # * I , cn©£DPS©n Oeutrodyne Radio Wherever radio is known the Neutra dyne is preferred. And the Thompson represents the Neutrodynp at its best. Through walls of local interference it rra'-hes out and brings in any desired sta tion clearly and with unusual volume. Easy tuning. No squealing or howling. Every tone comes clear and distinct. Long distance. Rare selectivity. The instrument shown above Is a 5-tube receiving set, embodying two stages of Radio tones, through the wood hell of The model shown has six tubes two S tuned radio frequency amplifications, de- the Music Master, become life like and stages tuned frequency amplification, <!e lector, and two stages of audio amplifica most pleasant to hear. There can be no tector and three stages audio frequency lion. Neat and attractive cabinet with harsh lies < 01 linniness. The tones are pure amplification Solid mahogany cabinet, compartment in bottom for batteries. and natural. A great instrument that r'osts n trifle more but does a lot more Look it over. brings out the best in any radio set. See it. NEBRASKA BUICK AUTO COMPANY LINCOLN OMAHA I SchninlUr A Mueller Piano Co. Troup Auto Supply Co. P. A. ( lark Motor Co , Itrnion Continental Furn anti Carpet Co. j A. Fflotpo Co. Wilhur Brandt, Inc. W. Peperkorn, Florence Council Bluffi, la. . . 1 RADIO ] -—> Program for January R. (Courteev of Radio Digest). By Associated Preaa. WM AQ. Chicago News (447 T»): 6 Ufee ele girls. a orchestral 8:30, Radio photo logo**, it, Chicago theater revue. Wl.S. Chicago (345) 7. entertainers. 7:20-11'. revue, organ, harmony girl*, or i lir.vi i ., WON. Chicago Tribune (3761: 0 organ i.:30. concert; 8. classical: 10. orchestra KYW. Chicago (5 3«): 7. <nn.cri. * musical: 9:«1 Youths Companion. 9.3... classic; 12*2. carnival. WKBH. Chicago (370): 7. Sunday school leson. orchestra; 9 reading". Hawaiian guitaiists. JO, orchestra; 11. program. WLW. Cincinnati (420: 0. concert, in. strumental uulntet I'W.X Cuba (400) : 7.30 concert. WFAA. Dallas News ( 472 9). 8 »«. vio lin: II. preheat ra WOC, Davenport (498): 7 :0. religion? di'-. osMion; 9 orchestra, songs KOA, Denver (323). I" orchesira. WW.r. Detroit News (516); 6. Newi or « healra. W BAP. Ft Worth St nr Telegram ( 4 h 2 9 i : 7:30. orchestra: 9:30. musical. KN\. Hollvwood (337 ); » niuic: 10. featres 17. orchestra; 1 popular alng-r WI)AF Kansas CJitv Star (411 ): 6-7 KIM. J.os Angelen Times (395)- 8. oi • hestra; 8:30. children: lu. features; 12 orchestra; 2 I,oat Ang-1* WHAS. Louisville Time* (322 4): 7::: 0. concert. W.MC, Memphis Commercial Appeal 1.103 9): 8 bedtime; 8:30. classical WCCO Min"* *-)ot :«.St Paul (417): 8. • ophles; 9:15. hockey game: 10. or School of the Air. 11:41. Xighthawks chestra. CK AC. Montreal (425); 6:30. concert: 7 3<». studio: 9.30. dance WJZ. New York (455): 6. orches»»-a: 7 talks; 7:20. soprano. 7:30. motion pictures; 7:45, soprano: 8. Jewish history; R :c nlayers; 9:30. orchestra KHN New York (380): 6 3«. orches tra 7:30. entertainers; 10:30. orchestra WOR, Newark (405): 7. string quartet, 7:11. pianist. 9. cellist soprano. KQO Oakland (312): 6 concert; 10, ':!•* club, guitarist; 1?. dance, soloists WOAW. Omaha (522 3) 6, dramatic. 6.30, announced 6 :45. program; 9. pro gram 11, orchestra: ll:3o. organ. WPAR Philadelphia (391 ): 6:36 talk WFI. Philadelphia (395): 6. talk; 7. talk. 7.15. talks. KDKA. Pittsburgh (3691)- 6 30 Rlch ard. the Riddler: 7.36 hand WCAE. Pittsburgh (462 ): 6 30 Uncle Kaybee; < 45, movie 7:3musical j KOW. Portland Oregonian (492): 12. orchestra. KPO. Pan Francisco (423): 6 Jfl. tea daneant; 10, danc* WHY. Schnectady (380): * 30. orches tra "ongs KFOA. Seattle ( 455 ): s 45. program. 10-30. dance. 12:05 orchestra WBZ. Springfield (337 ): 6 15. history! 6:30 trio. 7 hockey game KSD St I-oui" Post Dispatch (149 1). R sv rnphonv «n hestra WRC Washington (4C9): 9:30, dance I 10:15. organ / — ■ ' -V WO AW Program ^ j Muturduv. January 14. f. n. m—Dramatic hour i:5v> p in—To be tnnouruyj, 6 45 p n —Dinner prugram 5 p in —Program 11 p. in Krank ifud*k and hia Omaha '■ ik h t ingaleit Argentina's Best Months. The best radio months in Argentina are between April and September, when static is at its worst in the Knifed States, due. of course, to the reversed seasons in the southern con tinent. With the opening of the radio sea son a large demand for receiving sets >s anticipated from Buenos Aires. Re cently an American company organ ized the Association Argentina de Broadcasting. with 350 members, mostly dealers in radio apparatus. This company pays a fee broadcasting and also publishes a monthly maga zine. It is estimated that 90 per rent of the radio imports come from the Knifed States Approximately 100, OOtt receiving seta aie now used in Ar gentitta l.onofviiv of Dry Pells. Because he.it hasten* the evapora tion of the run tent* of dry rell bn? Dries, they should he kept in a cool ! dry plate. an<! should alwny* he Moih] in an upright position, never on their side Radio Goods 1924 Exports Large Department of Commerce Re port Shows Total of $5,000,000. Kxporis of all classes W electrics! equipment for the year 1324 will *p proximate $83,000,000 and will exree l the 1323 total by about *12,090,090, according to the electrical equipment division of the Department of Com mence. 'Phis estimate is based on trade figure* for the first 11 months of t lie- tear and does not include ligute* covering exportation of such electrical equipment as motor cars, the built In motors of machine tools and the like. As has been true since radio as sumed a commercial role, the expor tation of storage batteries, both pri mary and secondary, again showed a decided increase In 1924 over that of the previous year. In the case of primary batteries, however, the gain was probably due principally to the ^ marked increase in the shipments of ^ flashlights—$632,307 for the first 11 months of 1324, as against $455,Sal for the same period of 1923. Of special interest is the radio business Itself, which, due largely to the evergrowing market caused by the dissemination of radio knowledge throughout the world, together with the ever-growing tendency In other countries to remove restrictive meas ures that have hampered the manu facture and use of radio and the greater freedom granted to broad casting stations in operation and under process of construction by each foreign government In question, have also contributed toward malting our 1924 exports in this class practically twice that of 1923. Our radio exporis. by value, for the year just passed will undoubtedly exceed $5 609,000. Foreign Market Survey. Ruben A. Rundqtilst, chief of the electrical division of the department >f commerce. has sailed from New York to investigate market possibili ties in Central and South American countries for American radio ami electrical equipment. His itinerary will include Venezuela, Columbia, Costa Rica, Nicaragua. Guatemala and Mexico. Mr. Rundquist will make particular inquiry into the question of available sales aeeneiee for electri cal manufactures of the United States, especially a« to radio poods. \ aliic of Low-Los« Apparatus. Low ]os9 apparatus in a set add'' greater selectivity, more volume and reception over long distances. Low • loss instrument* are designed to re duee loss of energy from absorption, resistance and leakage, thui more energy can be utilized in the circuit, greatly Improving the results. Many Srek Training. More students are enrolled in the i-b" spond^nce course of the |Vm>vlv .nl.i State ctolleye Than in anv • • r of the mrrespondente courses offer* <1 by the department Br*t Ratlin Pliers. Tl e im.-t u«pfu] pliers for tfoilding • • * ivinjc ate of the small round* nose t > pe. with cutting jaws. “I WOULD JUST AS SOON BE WITH OUT A NEWSPAPER AS WITHOUT A RADIO SET.” Do You Know A $14.50 Crosley 1-tube Radio will put you in touch with the ENTIRE RADIO WORLD? DECIDE NOW to see how well you like radio by buying a small set. Ask About Crosley at BEATON DRUG COMPANY PATTON MUSIC COMPANY MICKEL MUSIC COMPANY UNION OUTFITTING COMPANY OAKFORD MUSIC COMPANY If You Want to Put More Money in a Set, Ask Them About 2- Tube Crosley .$18.50 3- Tube Crosley .$30.00 Tryrdyne . $50.00 Tryrdyne Special . $60.00 Garod 4-Tube Neutrodyne . $100.00 Melco Supreme Acmedyne . $100.00 Freed-Eiseman 5-Tube Neutrodyne $150.00 I Freed-Eiseman Deluxe . $175.00 Freed-Eiseman Console . $285-00 Abort Sets Distributtd by Auto Electric (it Radio Corp. OMAHA \__f