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ADIO AGE The MaÇazine of the Hour Price 25 cents 'Fowl OFFICIAL NEWS MEDIUM FOR NATIONAL BROADCASTERS' LEAGUE RADIO AGE INSTITUTE To insure 100% value to readers of advertise- ments, as well as 100% value to the advertisers themselves, radio equipment is now being tested and indorsed by the RADIO AGE INSTITUTE 64 NEST RANDOLPH STREET CHICAGO, ILLINOIS No charge is made for testing and approval, and all merchandise will be returned as soon as possible, transportation expenses to be paid by the manufacturer. Lists of makers of approved radio goods will be published from time to time. SERVICE DEPARTMENT FOR READERS Please ;remember that Radio Age has one of the best radio instructors in the United States, who is ready to answer any technical question. This costs you nothing. In Which Vol. 2 RADIO AGE Proposes Your The Magazine of the Hour Health ITH this issue RADIO AGE Volume 2 JANUARY -FEBRUARY, 1923 Number 1 W enters upon its second year and volume and we take this CONTENTS occasion to say an appreciative Page word to those who have been How to Make a Sharp Tuning Crystal Detector.____..... 3 By FRANK D. PEARNE going along with us through the various interesting stages of Fees for Composers -None for Broadcasters____ 5 By FREDERICK SMITH development in the wireless field. Gen. Squier Sees a New Era 6 We started modestly, but with an abiding faith in the possi- Harbord's Views on Broadcasting 7 bility of making a middle -west- Description of Fixed Condensers Used with Simple Homemade Radio Receiving Sets 9 ern radio publication that would be sufficiently interesting Description of a Loading Coil Used with Simple and Radio Receiving Sets_ 12 helpful to find a field for itself. Here's That Lawsuit Against Grebe 14 Long before the end of our first year readers had been "Hooverising Radio " -Legislation Urgently Needed..__15 registering from every state in With the Radio Trade 16 the union, not to mention sub- Thought Waves from the Editorial Tower 17 scribers in such far -away places National Broadcasters' League 19 as Germany, Brazil, Holland Pick-Up Records by our Readers 21 and Hawaii. Questions and Answers 22 It is an old axiom in the Interference Causes Lawsuit 23 newspaper editorial office that Corrected List of U. S. Stations 26 -27 a good story is a good story the world over. The same holds 500,000 "Attend" Radio Wedding 32 true of a good publication. If it meets with favor among the RADIO AGE is published monthly by fans in the Mississippi Valley RADIO AGE, INC. it will find friends anywhere on the radio map where English Publication office, Mount Morris, Ill. is Editorial and Advertising Offices, Garrick Building, 64 W. read. Randolph St., Chicago. We have tried not only to present valuable and up -to -date FREDERICK SMITH, Editor FRANK D. PEARNE, Technical Editor technical information, written M. B. SMITH, Business Manager by authorities, but we have Mid -West Advertising Representatives: YOUNG & WARD sought to reflect in our pages 308 North Michigan Avenue, Chicago, Ill. a broad vision of radio in its Eastern Representative: GEO. W. STEARNS present social and economic Flatiron Building, New York City, N. Y. aspects and in its tremendous possibilities. Advertising Forms Close on 19th of the Month Preceding Date of Issue. Here are our thanks to the Issued monthly. Vol. 2, No. 1 Subscription price $2.50 a year. Entered as second-class matter September 15, 1922, at the post office at Mount reader- family and our most cor- illorris, Illinois, under the Act of March 3, 1879. dial wishes for the new year Copyright, 1923, by RADIO AGE, Inc. -THE EDITOR. JIIIIIII I!II I!Allllll II II I lll II!IIIIIIVIIIIIIIPII,IIIII IIIPIIII IIII I IIIIPIIIIIII IIIII IIIlillllllllnllllll,IIIII IIIIIIIII IIIIIII IIIIII,IIII OII IIIII I,II ll ll lll'.I III OIn1t IIII I In, Pll tllll llll lll' GI I III, II ll ll lll II!IPIII Illh llll l,ll llllli IIII!IIII IIIIIIIII IIIIIIIII IIIIIIIIIIIIII II IIIIIIIII IIII IIIII IIII IIIlilllllllllllll Illnplll lll ll lll llllllllllll llll llllllllllllll I a E. New Radio Books. E 3 COVERING Details on how to operate a set, how Ea to build a set, principles of vacuum tubes, radio hook -ups etc. Standard and up -to -date Radio books; practical books for the practical man. Each written by an authority and in a manner that makes them easily understood. Ideas for the Radio Experimenter's Laboratory, by M. B. Sleeper $0.75 Radio Hook -Ups by M. B. Sleeper..__ .75 Radio Design Data by M. B. Sleeper .75 P. Construction of New Type Trans -Atlantic Receiv- ing Set by M. B. Sleeper .75 Construction of Radiophone and Telegraph Re- ceivers for Beginners by M. B. Sleeper .75 How to Make Commercial Type Radio Apparatus by M. B. Sleeper .75 Wireless Telegraphy and Telephony Simply Ex- plained by A. P. Morgan 1.50 Experimental Wireless Stations by P. E. Edelman 3.00 A B C of Vacuum Tubes Used in Radio Reception by E. H. Lewis 1.00 Any of these books will be sent prepaid to any part of the world on receipt of price. Remit by Draft, Postal Order, Express Order or Registered Letter. For Sale by Radio Age, Inc. a 64 West Randolph Street Chicago, Ill. e E. B I ° ir How to Make a Sharp Tuning Crystal Detector (Here it is -the long distance crystal set) By F. D. PEARNE SINCE the atmospheric con- extent, but is this due so much up and thrown on the scrap heap? ditions have cleared up to to the inefficiency of the crystal It is usually taken for granted such an extent that carefully as it is to the tuning arrangements that any old type of a tuner is designed crystal sets are getting usually used in connection with all right for a crystal and as a rule distances never before dreamed of, them? the crystal set is furnished with the lowly little crystal is again It is very seldom that one sees a single circuit inductance which, beginning to attract attention. the finer type of tuning apparatus it is true, is capable of bringing Everybody wants to know about associated with the crystal. The in the 360 meter stations fairly that long distance crystal set, and Germans experience no difficulty well, but it will also respond to in this article we are going to in covering long distances with a wide range of wave lengths and show how this set is made and a crystal, but they use the same as a result, any stations having why it is called the long distance carefully made tuners in those waves from 200 to 600 will come crystal set. Some fans seem to sets as they do with the audion in on the 360 meter wave adjust- think that the crystal set is not type, so why not give the crystal ment, nearly as strong as the 360 as sensitive as the audion bulb, a chance, or at least an even break meter station, which makes it which may be true to a certain with the audion, before it is given practically impossible to hear any AERIAL A 2. B /ND/NC POST .0005 CONDENSER G ND/NG POST 0.1. A I. BINDING POST VARIOMETER 8.P -T PHONE CONDENSER .0025n.r PHONE 5 CONDFNSER 8.P -T/ F/CURE-A Gi 8 /ND /NG POST GRCUNO 4 RADIO AGE -"THE MAGAZINE OF THE HOUR" selection entirely through without lower binding posts marked "D -1" Halt Radio frequent and noisy interruptions. and "T -1" as shown on the drawing. Tax An The proposed Chicago radio ordi- And another thing which makes extra variometer might then nance, which has been under considera- confusion particularly bad is the be added to make the set regenera- tion since last summer, struck another fact that often several stations tive. This of course should be static screen and was put over for broadcast at the same time, on placed in the plate circuit. To further consideration early in January. waves of the same length. A adjust the set, the coupling should The ordinance. drawn by the de- single circuit set is incapable of be set at maximum, that is, the partment of gas and electricity, was selecting any one of these waves windings of the rotor of the vario- designed to protect radio fans and the by itself, which must be done if coupler should be in a horizontal public generally from hazard to life clear reception is to be expected. position. The crystal should then and property by improperly constructed be adjusted and the variometer outside aerials, and provides a fee Figure "A" shows a crystal de- turned until the signals are heard, for inspection, which the radio user tector receiving set, so designed must pay. This fee ranges from $1.50 then the coupling is gradually re- to $3 per set. that sharp tuning is easily obtained. duced, that is, the rotor should The parts are easy to construct At a public hearing of the council be turned at a slight angle and committee protests against the ordinance and yet are rugged and durable. then the variometer is again ad- A series condenser of .0005 M. F. were plenty, the support coming only justed until the signals come in. from the representatives of the depart- capacity is provided, to permit This process of changing coup- length the ment of gas and electricity. Chairman two wave ranges, and an ling should be carried on until Adamowski gave everyone who wished extra binding post for the addition the tuning becomes very sharp an opportunity to talk and protests of an audion detector is also added.