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Show THE SAUNA SUN, SAUNA. UTAH Longest Concrete Arch Bridge in World (Copy tor Thin D?partiunt supplied American Legion vew PEACE-TIM- Service.) by the WORK, E LEGIONS PROGRAM The army which was mobilised for war ten years ago Is now being mobilized for works of peace. The whole force of the American Legion Is being movement thrown Into a nation-wide vetof community service. World-wa- r erans In Legion posts throughout the country are planning and carrying out activities by which the" hope to better conditions in their communities. Community service work Is not a new thing to the Legion. One of the purposes for which it was organized wns to continue in peace time the service to the country which Its members gave during the war. Many posts already 'have outstanding community service projects to their credIs concrete the new Mendotu bridge at Minneapolis longest One mile in length with 12 piers 120 feet high, the It was dedicated to war heroes. There Is a roadway of 43 feet it. They have built community houses, urch structure In the world and cost $2,000,000. camps and swimming pools, fresh-ai- r width over which pass many thousand vehicles each day. libraries. They have conducted expositions, sponsored hoy scout troops, established playgrounds, encouraged education and given relief in disasters. I5ut this year community service Is the thing on which the I.egion Is centering its attention. Every one of Its 10,000 posts has been directed by a Lab" Receiver. The R. B. Considerable Interest has been aroused all over the country by Keith Henueys nrtleles on the Lab circuit which has been appearing In Radio Broadcast Magazine. In a Issue of the same publication, John Brennan, technical editor, describes the construction of such a receiver, which, although employing only four tubes, Is sufficiently sensitive, and produces satisfactory volume, for average requirements. Reference to the accompanying dlngram at once brings to our mind at least one unusual feature. We note that It reads from right to left Instead of ylce versa. The reason that the apparatus has been laid out for signal progression from right to left Is that, by so doing, connection between the colls, sockets, and transformers, etc., are made as short as possible. In some Instances the connections between certain apparatus in the original model require no wire at all, the lugs themselves being long enough to meet and be soldered together. Wiring Behind Tube Sockets. This novel form of construction also enabled practically all the A," "R," and C wiring to be carried behind-thtube sockets and to be cabled. The cabling Insures against feed back between the various units comprising the receiver, Mr. Brennans receiver re-ee- One of Gotham's Six Sleighs Gets a Chance e tf them would probably he noticed, nnd It Is in New York city, and ufter the recent heavy snowfall the owner'of one of and gave some friends a Jolly ride reminiscent of old times. WOMAN GEOGRAPHER naturally to best advantage To inate these as much as possible. tralization by the Rice method Is May Be the Temporary White House Reports- - being received by Dan Sowers, director of the uetivity, show that the order Is being carried out with enthusiasm everywhere. The convention mandate left to the Individual post the selection, of the service to perform. Kadi post was called on to determine the undertaking which would most advance the of t lie community In which the post Is located and to dedicate itself to the accomplishment of that undertaking. The work being done varies according to the requirements of the different communities. Records of the work achieved are kept and reports nre made to state and national Legion headquarters so t hat the entire organization und the public may have the benefit of each post's experience. The Legion believes that by uniting In unselfish effort and neighborly helpfulness, its 700,000 members can bring about an appreciable betterment of conditions in many localities. These local Improvements taken In total become of national importance, and the Legion feels that it Is rendering a service to the country Just as reul as service of its members the war-tim- e When the Legionnaires start to France for their national convention aid a pilgrimage to the battlefields cemeteries of the- World war, It inThe Willard hotel Washington, which la being prominently mentioned and as temporary executive mansion while the White House- - Is undergoing exten- is the hope of the Legion, us expressed sive repairs, starting March 5 next. U was in this hotel that President and by its last convention, to have performed work which will have exempliMrs. Coolidge made their home while Mr. Coolidge was rice president. fied the Legion ideal of service la every city and town In America. well-bein- I an American union, has been elected president of the newly formed Women Geographers club.. ..She Is well fitted for the post, being an author, lecturer and photographer. She has traveled extensively and at present Is In Europe In a hospital recovering from Injuries she received while traveling in Spain. Tony Tommy to Visit Mr. Coolidge g Two California Post Erects 30-Fo- Redwood Arch ot redwood arch over t he main highway at the southern entrance to Exeter, Calif., has been constructed by Exeter Post No. 94 of t he American Legion. The' arch Is 30 feet high and 40 feet wide, and hears the name of the city in large letters. The upright pillars are four feet square and covered witli redwood hark. tne pillar hears the American Legion emblem wtiile the oilier bears the emblem of the American legion auxilThe crosspiece is of redwood, iary. two feet square, 'above which Is fixed the name of the city. The name and the emblems are illuminated at night by concculcd lights, which are turned on and off by an eight-da- y clock. Work on the arch was done by the Legionnaires under the direction of Fred ILiucnstein, who designed the structure. Every member of I lie post furnished one day's labor, either or by proxy. SENT TO SEVILLE Cl Will Train Officers of iasirm'tlim lias been (S. J.) organized by the (Vi'nl.-of American Le-county gloii posts to train nllieers of the t Ions posts in lie ritualistic work of Thomas named by American exposition Spain. E. Campbell, who has been President Coolidge as the Commissioner to the great soon to be held In Seville, Chief Tony Tommy of t lie Seminole tribes, otherwise known as Chief photographed with his wife when on a shoeing tour in Miami. Chief Tommy Is to Journey to Washington where tie will present his formal request to Prcrid mt Coolidge for cithern hip and ask that the Semin ules be permitted to remain In their everglades homes. 4u . i tii a. Gen-Wi- N. Two Samson choke coils, 85 millihenries. One Sami on output Impedance, type O. One Tube Iknitschmnnn bypass denser, 1 I ' ! con- mfd. One Tube Deutsclimann output condenser. 4 mfd. One Elect rad Royalty variable res. !& meg. Oue Electrnd filament switch. One Elect rad grid condenser. 0.00025 mfd. One Elect rad fused metallic grid leak. 4 megohms. Two Irarhstntfl, j ampere and ampere. Two Frost pin Jacks. One Precise ml.rodonser, type Otft, 50 mnifd. Nine XL binding posts. One Rodion binding post strip. Inches, One panel, 7 by 21 by ornilcn. One Fritz cabinet. So that a power tube inny be used In the last audio stage, the filament wiring to tlds soeket Includes a sep arato i ampere filament ballast, such -- y A 1C9E. dials. Two Marco Four sockets, air gap. audio Tw'o Amertran frequency transformers, first and second stages. One XL neutralizing condenser. tyjte A 0 Some simple means of effectively controlling the output from an audio frequency amplifier la almost imperd ative since broadcasting stations have come Into vogue. the receiver or cutting In resistance on the rheostats governing the flow of current to the tube filaments are commonly used to reduce loud signals, but both methods have characteristic fanlts. By means of the simple additions shown, a smooth, even control Is provided that directly regulates the energy applied to the amplifier tubes. Neu- Lab circuit tuning coils, . Illuminated Additions ta Control Audio Frequency Output arr prac- 1 densers, type -- elim- tically independent of frequency, or. snld In another way, one adjustment of neutralization will be sufficient whether the set Is being tuned to (lie long or short broadcasting wave lengths. , References to the diagram shows that two r. f. choke colls are employed in the tuiier circuits. Both of these nre Samson So millihenry chokes. They are shown In the diagram between the numbers 0 and 7, nnd 27 and 28, That In the secondary circuit of the antenna tuner Is useful In preventing oscillation of the circuit at the extremely high frequencies of about 3,750 kc. (about 80 meters). In the detector plate circuit the choke Is employed to prevent r. f. currents passing through thq primary of the audio transformer. Across the secondary of this first transformer Is connected a variable resistance unit of soft, 0 10 ohms maximum. This nets ns an efficient. volume control. In the output circuit nre arranged an audio frequency output impedance unit nnd large capacity condenser so hat the diaphragm of the loud speaker may he operated free from the excessive drag likely to lie Imposed upon ft by the d. c. component of the high I. potential on the plate of the final tube. The audio Impedance unit employed here Is a Samson tapped output colt, and, due to the fact that the Impedance of fids coll may he approximately matched to the characteristics of the loud speaker on account of the tappings, better quality Is possible. The condenser employed at tills point bus a capacity of 4 mfds. The following list of parts Is recommended In Radio Broadcast : List of Parts. Two Cardwell 0.00035 mfd. con- mandate of the national convention at Philadelphia to swing Into action on the problem of making the United States a better place in which to liva Mrs. Harriet Chalmers Adams, wife of Franklin Adams, counselor of the When Rice neutralization Is employed, this shielding Is very much to be recommended, for, otherwise, lmnd capacity effects There are but six sleighs remaining ' got It out a panel shield. employs as a Brachstut. The other three tubes are connected with their filaments In parallel, and are controlled by a single ampere ballast. Regeneration In the detector circuit is accomplished by means of a small variable condenser of 50 nvmfd. The Precise condenser may be used at this point. The colls employed In the circuit are of the binocular type. These are now obtainable on the market, and, though full constructional details, with diagrams, are given for these by the author of the Radio Brondenst article, many builders will no doubt prefer to buy the colls ready made. They are mentioned in the above list of parts. The layout of the apparatus Is quite an Important point and It Is recommended that the original be followed In this respect (b) Transformer System of Coupling; Idea Applied to Reactance Coupling. f In Fig. A the scheme Is shown where a transformer system or coupling Is and In Fig. Ii the same idea Is applied to resistance coupling between the detector and first amplifier tubes. Since a control of volume is desired primarily, the resistance used should' he a potentiometer of high- - value and the grid should be connected to the slider arm. The Immediate function of the potentiometer is to control the amount of current applied to the grid of the amplifier tube, thus controlling its output, since t lie grid functions us a trigger regulating the amount of current in the plate circuit. When using tlds' system In the case of resistance coupled amplification the potentiometer takes the place of the grid leak. Under no circumstances should the rheostats of the audio frequency amplifying tubes be used to control the volume of their oatput, since distord tion will Invariably be the result Radio Organ Playing Differs From Concert new art has developed with the Introduction of the pipe organ in rudio broadcasting studios the radio organist. Playing for radio transmission requires a very special technique. Much time must he spent In acquiring, a knowledge of the requirements for Special arrangements broadcasting. of st ops must be made and combinations worked nut so as to produce the liest harmonious effects for the listeners. The greutest organists tuny be u A total failure In broadcasting concerts for radio audiences if they have rnt first worked out the new form of playing before microphones, according t E. Schenk, who pluys for tin radio audience on Wednesday and Friday noons. Microphones must be placed in special positions In the stuos, so ns to get the very best results and the control operator must be alert to properly modulate the amplifier through which the music passes Into the station. Erwin VVLV tran-.-mlttin- Big Industrial Baby In less than six years of development, the young radio Industry has grown to a point where It d"es hal worth of hu'ncs a billion dollars ; tr. in supplies aid equipmei.; eii-t |