Bemidji Daily Pioneer Newspaper, May 26, 1922, Page 3

FRIDAY EVENING, MAY 26, 1922 HOW AMATEUR CAN BUILD A RECEIVER Instructions_for Settinn Up the Antenna and for Assembling the Tuner. i 1l In orqer to filuk up s sufliclent energ; with the simpie radlo recelving set nal to #n antenna consisting of one or more wires suspended in: the lnsulu(ed from all gv:qmuled xfluterlu] and the other tentllm\l toza gmund' usually’ the water supply plpe. The height of an antenna used.-with a small receiver should not-| hQ less than 30 feet, As th¢ received energy” va- ries directly as the height of an anten- na, the higher the antenna the louder will be the signals or volce produced. The length of an antenna for short wave reception should not be less than 50 feet nor should it be longer than 200 feet. The minimum wave length to which a simple receiver can Le f adjusted for electrical resonance will f be above that used by amateurs if the receiver be connected to an an- tenna 200 feet or more in length. A simple radiophone receiver cap- able of picking up radiophone sta- tions similar to KDKA at East Pitts- burgh, can be assembled by a novice for frém_ $4 to §$15, depending upon the builder’s ability to use his hands. If the .builder will construct most of his apparatus he will appreciate it much more and probably will under- stand more about ‘its operation than if he buys a set already made. How- ever, for those who have not the abil- ity or the time to spend constructing their own apparatus the following de- scription will not only give the details ¢ as to the construction of each com- ponent part of a receiver but also what standard ready-made parts can be purchased and used in its stead. The material can be purchased at any electrical supply store. 2 In erecting a simple antenna for use with the receiver shown in the - A diagram, the antenna proper and the lead-in are of stranded hard-drawn copper. wire, strand No. 22, costing about 1 cent per foot. The two insu- lators are of molded material.and can be purchased for about 25 cents each. The antenna shown is supported be- tween a house and a pole. It may be found more convenient to support it between a tree and a house, two houses or even between two chimneys on tlie same house. In bringing down the lead-in care should be taken that it is kept as far away from grounded material as possible and when bring- ing thiough the wall or under the win- dow into the house it should be brought through some sort of an .insulating tube, such as rubber or bakelite, In making the ground ‘connection, the same kind of wire can be used as was purchased for 'the antenna. You cun clean a section of the waterpipe thoroughly and solder the grouuzd wire to it. MAKING THE TUNER To make a tuner for this receiver, the following raw material will be re- quired : Piece of cardboard tubing three inches outside diameter and five inches long, costing about 10 cents. 100 feet No. 22 double cotton-cov- ered magnet wire costing 25 cents. Standard slider (see sketch) for % by .% brass rod, 40 cents. 1 six-inch length of % by % brass rod (square) 20 cents. 2 binding posts (see sketch) 20 cents. 2 circular blocks of wood whose diameter is just equal to the inside diameter of the piece of cardboard tubing and between 3-8 and 1-2 inch thick. Some shellac or varnish is also re- quired. - ~2 CARDBOARD TUBING The L £ tiibe: it is neeessnry £o " connpct.one. terni- ,! on_top of the coil and should be cap- r nud,,; of .the wire on the tube. Startin: onblia)t, 1868 rom one end of the mullmmd tube wind on the No. 22:D}C. C. e wWithin oheé-halt inch of {he other' end of the tube. | Fasten one end of the winding 'to the tube but allow some surplus wire on the other end for making a connec- tion. After the winding is in place give it a coat of shellac or varnish to hold the turns in place. Assemble ‘the circular-cut pieces of wood in the | geometrical center of the square blocks and then shellac or varnish them for the appearauce’s sake. When thoroughly dry slip the two end blocks into the wound tube and by means of a few finishing brads én through the cardbogrd: tube, fasten the end blocks to the wound The slider is t6 be' moimted able of making contact with any turn In order to e the insulation from the wire nder the rod where the slider moves back and forth; wrap a piece of sandpaper around a thin piece of wood and using another piece of wood as “a- guide, sandpaper the insulation from the winding. Drill a hole one- eighth inch in diameter through the slider rod about one-fourth inch in from each end so that the rod can be fastened by screws to the end blocks. -After the slider rod is fastened in place see that the contact finger on the bottom of the slider can at all times make, good contact with the windivg. Mount. a: binding post . on either end of -the coll, attaching one by means of a wire to the. slider rod und the other to the end of the wire wound on the tube and the tuner is complete. A tuner can be purchased already assembted for about $3.50 to $4.00. LINKING MOVIE AND RADIO British Scientists Have Some Success' in Wireless Transmission of Motion Pictures. . British scientists are reported’ to have met with more or less success. in developmg a method of transferring motion pictures~ by radio. Some months ago a photograph was trans- ferred by wireless from the Copen- ‘hagen newspaper, the Politiken, to Eng- land, and later from England to a ship in mid Atlantic, so that the possibil- ity of linking the movies with the new art is not remote. If perfected the new development of the already- versatile art will make it possible for one to see on his own re- ceiving instrument things that are hap- pening at a great distance. For instance, g ship is sinking at sea. The transmitting station. of the vessel, in- stead of sending a message of the dis- aster, sends a picture that anyone with a receiving set will be able to sece just as the present broadcasting programs are heard. That all sounds remote now, but the telephome was considered even more so, and the wireless, even after ‘Marconi’s immortal message had bridged the Atlantic, was generally be- lieved to be akin to the idea of per- petual motion. P } - aaeny I'§ TIPS TO THE RADIOIST E | ¢ s s A crystal detector cannot be 1 + satisfactorily amplified. z i Insulate ends of aerial wires $ with several small insulators. i Wherever possible run aerial $ wires at right angles to electric } light wires. : The lead wire should be the H size of the ‘combined number of % wires in the aerial. ; Gas piping makes a poor ground, but the cold water pipe H ground Is excellent. H A crystal detector {s never as. ; efficient as a vacuum tube detec-; ¢ tor no matter what instruments are connected to it. i Within three to five miles fror H a broadeasting station indoor H one wire aerlals about 40 feet long stretched from room to room, are generally satisfactory with crystal detectors. f “Tuner. right of way. | General Grant was observed on April | 27 this year and that of Lee will be ob- ..SQBBQNB?PQB THE PIONEER e 2w BTN LEGION ‘MAN, AID TO CUPID ‘Henry Sullivan, Phaenix (Ariz) Or. ganjzation Enthusiast, as J. P., Ties Many “Knots. Having secured plenty of experience In braving the perils of the deep while | a member of the navy -during the war, Henry J.| Sullivan of Phoe- nix, Ariz., is now helping to launch the several ships of matrimony | Y hishome ¢ty men r | StAYe thelr v (Lg;: barks they 3 .»'rze K ot Justicy of the Peace Sullivan to unslip the lines of their, singley plpssedniess. Mr. Sullivan Is dlso thé man who started the “Under one head, the American Legion i slogan bliich - has been adopted by ull the war organi- zations of his home county to ad- vance the interests of the service men, carry on hospitalization work, elimi- nate drives and working generally for the behefit of the men who served their country. As Mr. Sullivan himself expresses it: “All war organizations in the countyhave united under one head for the purpose of centralizing our work. ‘We expect to lend our efforts largely to hospitalization work and in other ways serving the disabled serv- ice men by placing the responsibilities on the various departments of govern- ment where they belong rather than by ndvpnung their rlghts in a slip- shod’ f{lsluon d FORCE PERSHING TO SPEAK Len\onnzlrn of B:mert Illinois, Hold Up ‘old Commanders Car and > i Demand an Address. Géneral Pershing was captured while “attempting to pass through friendly territory by a group of Amer- ican Legion men at Bement, Ill. The old leader of the A. E. F. started through the town on an interurban trolley-car, but Legionnaires, aided by Pershing Addressing Legionnaires. a powerful ally in the person of the motorman, gathered in front of the | trolley and demanded a speech, The rear platform of the car was turned into a speaker's stage and “Black Jack” addressed the service men and their friends for ten minutes. The Legionnalres -were marshaled to- gether by Sidney Morgan, their, post commander, who stood on the plat- form withhis,.0ld .general, and. it was not ‘until he had given the word that the ; former: members of Pershing's command would give the trolley the Adjusted Gompensation Wins, AdJjusted compensation won a de- cided victory in the nation-wide ref- érendum by the United States Cham- ber of Commerce—4,116 chambers voted favorably, 2,657 against the measure. The United States chamber has opposed the bill from the start. The commerce hody in Toledo, O., pro- tested the .questionnaire which was | sent out as being unfair In the way it presented the subject. Carrying On With the American Legion — e 4 . i A community playground will be made’ by the Legion at Nashville, Tenn., the ex- ml m bearingthe ex- of them misslon; ship of: a {Southern, sion, 1 giol cost Bhicle Smin $300 to clothe cach of his soldfers. The inis_ costfig bups§189, the War depart- { ment states. P The only woman field clerk In the | army is ) Jean Hodson of Sun | Francisco, Cal, secretary to Major | General Morton. She holds the rank | of sergeant major. Y The Legion in both North and South will henceforth observe the birthdays of Generals Lee and Grant, rival lead- ers of the Civil war. The birthday of served January 19, 1923, i1 that setygnil from |+ 20U will Wder “"mm \z’flY" qn DAILY PIONEER WANT ADS BRING RESULTS | present Mouglpoy: is garbed in cloth- §° “An*MissusJohnsen, be --nFe' t: g ,K ol Little folks instantly recognize Kellogg’s Corn Flakes from imitations! They know the delicious Keltoge flavor and they know that Kellogg’s are never tough or leathery or bard to eat! Kellpgg’s Corn Flakes are so superior in flaver aad in cn;p crunchiness that once you know Kelloga's you will always serve Kellogg’s! And, Kellogb s sh,ould be best hecause they are the original Cqrn Flakes-—— the ‘most dehghtfu cereal ever made! TInsist upon Kellogg s —the kind in the RED and GREEN package, becapse none are genuine without the’signa- ture of W. K. Kelogg, origina- tor of Corn Flakes! \ "~ Only a Short Time Left to Enter the “Nash’s Delicious Coffee” Word:Contest $1,855 in Cash Prizes OMEONE will win be $250.00 richer, and so on. prizes. Just sec how many words you can make out of the letters in the three words “Nash’s Deli- cious Coffee” (such as ah, nice, dclicious, clean, coffec, etc.) Send in your list before it is too late. All lists must be mailed before postoffice closing time on Friday, June Sth. 500.00; someone else will get ¢ You have just as good a chance as anybody at the big There’s no catch in this contest. Everybody has an equal chance. 75.00, another will It costs nothing to try. You don’t have to buy or sell any- thing. But if you send one label from a can of “Nash’s Delicious Coffee” with your list, you will qualify for a Targer prize than if you sent no lahel. If you send 3 labels With your list, you will qualify for a stjll larger prize. See schedule of prizes bilow. Whether you, epter this contest or not, you wxll be well rowarded anywa you try— Tt’s a real achicvement in coffec blending—Dbased on ex- havstive study and practical tests—a coflec so carefully selected, blended and roasted that it makes a uniformly rich, smooth, delicious and refreshing cup of coffec, whether you use hard or soft water. It neutralizes hard or alkaline water and brings through the full coffec flav it takes the gamble out of coffec-making. K Popular hostesses and discriminating houscwives serve Nash's Delicious Coffec. friends—it wins the approval of the family. Your coffec taste will telt you. Always the same—every can of the same high standard. Air- eleancd —no chafl, no bitierness—makes a erystal-clear cup of coffee. Shipped same day a5 roasted—*hot roasted” crispy freshness, pro- tected by moisture-proof hermetically sealed “Napacans.” Sold by grocers in one- and three-pound containers, : . . w V(G ANSWERS WIL = H 3 T ok Vbt 2 Lahels = : : 100.00 G 5 . . : 80.00 B 00, 60.00 =2 e 40,00 25.00 £1,555.00 860.50 £420.00 Send in Your List at once—qualify for the hig DO It NOW! cash prizes by enclosing the labels with your list. Address, Contest: Manager, NASH COFFEE CO- 1330 Quincy St., N. E., Minncapolis, Minn. — RULES OF CONTEST 1. This contest Is open fo apy man, woman, boy or girl in Ameriea, except amployees of ‘Tho Nash Coffee Co. and their relatives. ‘There is no entrance fee of any kind. 2. Use only one ide of the paper on which you write your list. your list of words in alphabetical order and number them. Write your full name and address in the upper right hand corner of each sheet. 4. In any one word, do not use any lettor oftencr than it appears in the words “Nash’s Delicious Coffee,"” 4. The judges will eount only English words found in Webster's New International Dictionary. 5. Ohsolete, compound or hyphenated words may be included in your Jist if found in the dictionary mentioned above. Either the singular or plural of & word may be used, but not both of them, 6. The same spelling of a word will be counted only once, even thought it muy have different meanings. 7. Two or more people may co-operate in t will be nwarded:to any such group, and 1o any one houschold or family. 8 It you send Igbels with your list, each label must bo complete, as wrapped around the fuce of cach can of “Nash's Delicious Colfee. 9. All lists will receive equal considerntion, whether labels are ment or not.. 10, 'The prizes will he awarded for the largest list of words that qualify. w person pending in llw largest corre r the nearest correct list will win the fi The one sending next best i will receive second prize, cte er consideration, such Luess orarmange: meng will have apy. bearing in awarding prizes. -However, by writ as plajn an possible, or by typewriting your list if possible, you wil assist the judges In’ conntinie every word that qualifics, 11, In case of n tic, the full amount of the prize will bo awarded-to-cash contestant tied. . 12, The prizes will be awarded by o committee of impartial judges. 15 AN lista mast bo mailed by, post offico clowing time, Friday, Juno 8, 1922, 1.5 Tha 9rlw winners will be announced two weeks after the, close of ~ contest, Writo contest, but only one prize one prize will be awarded