WA Jun 1924 .Pdf
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25 CENTS wJ _oikyliwwawtw w w IF w w wwwwwww-- i r i 5eatures in this Issue Newest Development The 'D -Coil 'Receiver wwwwiwww.w.w.www.w.w.www12'2w. w111111. By its designer, K. M. Macllvain The Cruise of the "eAra" W. K. Vanderbilt's Yacht 'Radio for 'Boatmen Motorists ô Hikers Construction of a Portable 'Receiver dummer Radio Described by M. B. Sleeper 1 www.americanradiohistory.com The Standard Tube for all makes of Radio Receiving Sets is the Vacuum Tube that has made possible the IT is and far -reaching application of radio telephony. and that plays the most important part in the operation of your receiving set. Radio messages from government' leaders -from the heads of the world's greatest educational insti- tutions or from those who stand foremost in the arts of the world will serve to bring the human race into closer contact. Cunningham Vacuum Tubes, standard for all makes of receiving sets-built by one of the world's largest manufacturers with unlimited resources - are the product of years of manufacturing experi- ence and the creative genius of the engineers of that great scientific organization, the Research Labora- tory of the General Electric Company. + + :). LA r tf The care and operation of each model of Receiving PRICES ON PATENT Tube is fully explained in our new 40-page "Radio NOTICE Tube Data Book." Copies my be obtained by CUNNINGHAM sending ten cents to our Sat Francisco othee. RADIO TUBES Cunninnhao n tu bes are covered by pat - Now in Effect ruts dated 2- 18 -08. (:- 301A -5 Volts 1 -4 Ampere a n d others isnted Iilament..03.00 1'-219 -3 Volts .00 amp. and pending. Li- Dry Battery Det. & censed for amateur, Amp. $1.00 experimental and en- C-300-3 Volts Cas Con- tent Detector $1.00 tertairunent tt se in C-11-1.I Volts. _lamp. radio communication.nication. Dq Battery Det. and Amp. ',SC veil! Home Office: Special Base. $5.00 Any other ('- 12- $Dollar to C -11 be an infringement. 182 Second Street 154 W. Lake Street 30 Church Street with standard base SAN FRANCISCO CHICAGO NEW YORK el 00 www.americanradiohistory.com NU.192-1 THE WIRELESS AGE 1 The Phones with the New Idea N& K Head Sets mark a new era in radio repro - duction -an era of clearness and naturalness. Designed especially for the reception of musical tones, they record the entire range of the human voice and of musical instruments with extreme clearness and freedom from distortion. This is due to mechanical design different from that of any head set produced in America. And to an extremely careful quality of work- manship almost impossible to obtain in this country. Sold on a comparison basis NOK If, when you use N & K Phones on your own radio set, you do not find that they reproduce all the tones more clearly and naturally than any set you ever used before, and if they do not fit more comfortably, the store where you bought them will refund your Imported money, promptly and cheerfully. We protect dealers and replace any returned phones. N & K Head Set, Model D, 4000 ohms, has extra PHONES large diaphragms and ear caps, insuring better reproduction, better comfort and the exclusion of outside noises. Sanitary, leather -covered head hands. Six feet of stout cord. Retail price $8.50. DEALERS: N & K Phones provide Write for "The Phones the Fans Are Talking the high spot in the radio stocks of About," interesting new descriptive folder. dealers all over America. Racked by TH. GOLDSCHMIDT CORPORATION advertising and strong sales coopera- tion, they are proving attractive profit - Dept. W 6, 15 William St., NEW YORK in with Exclusive Distributors for United States, Canada and Mexico makers. Packed cartons of ten, display material and literature. When a riling to advertisers please mention THE WIRELESS AGE www.americanradiohistory.com O 4 trete LJmencas 9dremos I Radiophone 4view - I' oI. ,XI -o. 9 1 June, 1924-Contents Tour eluthors Editcrial Chat 14 A Radio Reverie of Summer - 17 U7 ALT. S. THOMPSON, JR. (Tele- phone Conversation by Radio) made Pictorial Section - - - - - 18, 19, 27, 32 his first radio set as a boy in 1914, and has studied and experimented with radio The Cruise of the "Ara," By William A. Hurd 20 ever since. During the war he was con- 24 nected with radio in the U. S. Naval Air Radio for Boatman, Motorist or Hiker, By W. F. Crosby Servize. Since leaving the service he has Radio on Mount Hall 28 been pursuing studies in electrical engi- Marcy, By E. Shepherd neering and doing advanced graduate Telephone Conversation by Radio, By Walt. S. Thompson, Jr. 33 work on radio communication at Lehigh University. He informs us that his prin- Selecting Loud Speakers, By Dr. Alfred N. Goldsmith 33 cipal hobby is fishing - not DX fishing either. but the old -fashioned piscatorial The D-Coil Receiver, By K. M. Macllvain 34 sort. Increasing the Range of the Super -Heterodyne, By William J. Smith 37 are pleased to note that Hall E. WEShepherd (Radio on Mount Marcy) The Boy Scouts of America, By Pierre Boucheron 38 who has been completing some research Wildemess,'By work at Yale University, has just been Radio in the Canadian Sinclair Arthur 40 admi-,ted to the practice of law. We wish The Right and Wrong of Receiver Tuning 42 for him the attainment of fresh mountain peaks in his chosen profession. Peeps Into Broadcasting Studios, By W. A. H. 44 CROSBY (Radio for Boatman, World Wide Wireless 48 WF.Motorist or Hiker) has been a radio amateur since 1407. He was in the Best Bets in Humor 52 marine business for twelve years, design- ing, testing and building motor-boats and Afloat and Ashore with the Operator, By William S. Fitzpatrick 53 yachts. He is now interested in the full A Set for expío Cation of radio in motor- boating. Radio the Summer, By M. B. Sleeper 54 Mr. Crosby was responsible for the be- 10,000 Boys Wanted ginning of the first New York radio 57 supplement-that of the Globe. He also Chasing Squeals, By R. A. Bradley 58 started the Amateur Modulator which he conducted for two years. Amplifiers, By Louis Frank - - - 6o le." M. Macllvain (D -Coil Receiver) Condensers, By Donald Gordon Ward 6z graduated from Tufts College. He then served in the Navy as an operator, Radio Frequency Circuits, By Henry Baron 64 stationed at London, England. Follow- ing the war, he entered the service of the Radio Engineering, By John R. Meagher 65 Radio Corporation of America in the Selected Radio Hook -Ups for the Home Builder bb traffic and engineering departments. He was transferred to Belmar. N. J., for en- Information Desk 68 gineering on marine transmission and reception. There he assisted in the Broadcasting Station Directory - 69 design and construction of marine trans- mitte -snow used in Marion, Mass., for High Lights in Radio Development 71 transmission to ships at sea. He is now engaged in the development work of New Appliances and Devices - - - - 72 Trans- Oceanic reception for the Radio Stations Worked and Heard Corporation. Mr. Macllvain reports 92 three children, all interested in radio. Amateur Radio Stations of the United States 95 PUBLISHED MONTHLY AT WIRELESS PRESS, INC., 326 BROADWAY, NEW YORK LOS ANGELES, CALIF.. 456 So. Spring St. CHICAGO. ILL.. 410 N. Michigan Ave. GREAT BRITAIN AUSTRALIA Coast Puhliehero l'o. Wheeler & Northrup 12 -13 Henrietta St., London 97 Clarence St.. Sydney C S W. Yearly subscription in U. S. A., $22.50- Outside U. S. A., $3.00; Single Copies. 25 cents. Entered as second class matter Oct. 9, 1913. Post Office. New York. N. Y., under the Art of March T. 1879. Copyright, 1924, Wireless Press. Inc. When subscription expires you will find a renewal blank enclosed. Return with remittance promptly. James G. Ilarbord, l'res L. MacConnach, Sect. George S. DeSousa, Treas. H. L. Welker, Adv. Mgr. H. H. Reber, Bus. Mgr. Major Jerome W. Howe, Editor C. S. Anderson, Associate Editor Because certai, statene its and expressions of opinion from correspondents and others appearing in these columns from time to time may be found to be the subject of controversy in scienr tic circles and in the courts. either now or in the future and to sometimes involve questions nr of invention and the comparative cf apparatus priority merits em toyed in wireless signaling, the ownersi and publishers of this magazine positively and emphatically disclaim any prlvitY or responsibility for any statements nfpinion or partisan expressions if such should at any time appear herein. Printed In U. S. A. THE WIRELESS AGE Is a member of the Audit Bureau of Circulations, www.americanradiohistory.com In radio the Neutrodyne is the ultimate for selec- tivity and clear, true reproduction, as well as for power and ease of operation. THOMPSON NEUTRODYNE means the best radio principle plus the engineering skill of an organization that has been building radio and wireless apparatus for over fourteen years. The THOMPSON is a factory- built -not an assem- bled -5 -tube Neutrodyne. What this means to you can be demonstrated by any good dealer. Price $150 without tubes or batteries. THOMPSON MAGNAPHONE is built upon an entirely new principle that gives purity of tone in any volume -yet no battery cur- rent is needed. The THOMPSON MAGNAPHONE is $35 ar all good dealers. R. E. THOMPSON MANUFACTURING CO. Manufacturers of Wireless Apparatus for the U.S. Army and Navy and numerous foreign governments l50 NASSAU STREET NEW YORK, N.Y.