N. S. E:dition

Los Ange California August 1922

An Excellent Short Wave Receiver ---Amateur Experimentation Directional Radio --- History of Radio ---W av v Lengths "IF IT'S IN THE AIR, PEERLESS GETS IT"

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1 Switch Lever, complete___ J JOBBERS, DEALERS - This is Bakelite cut to your order, per lb $2.50 the livest and newest popular Peerless Variometers $5.50 and Up priced Radio set on the market. Peerless Variocouplers $3.50 and Up Baldwin Phone Units $6.00 is a big demand for Peerless There Dials 75c Equipment. Now in quantity pro- duction. Immediate delivery if you wire. We will protect you on territory. You will be surprised We carry Everything at our discounts. Just try us. for the Radio Fan and his brother.

PEERLESS RADIO LABORATORIES INCORPORATED 50 Second Street San Francisco, Calif., U. S.A. August, 1922 Radio Journal Page 125 Radio Achievement Here, There, and Everywhere

RADIO JOURNAL makes a sincere effort to meet the demand for both specific and general information concerning radio activities.

illustrated with photographs and diagrams Instructive articles for everyone Directions for Experimenters Entertainment for the "fan" Technical material for the Initiated

Come on in ---It's not too deep !

SPECIAL SUBSCRIPTION BLANK Radio Journal Publishing Co., 1 13 Stimson Bldg., Here is the Los Angeles, California. Gentlemen: I enclose One Dollar ( $1.00) for five months' Little Blank that subscription to RADIO JOURNAL, commencing with the Brings Big Returns. number. Name It Mail Today! Address Page 126 Radio Journal --T August, 1922

562 East Colorado Street The Radio Store PASADENA, CALIFORNIA

PASA-UNIVERSAI. RECEIVING OUTFIT.... $346.00 Kennedy Universal Receiver -type 110 $250.00 Western Electric Headset -type 1002-C 15.00 One Detector Tube 5.00 B Battery 3.00 Edison Storage Battery -5 cell B-4 75 amp. hr. 65.00 Antenna Equipment 8.00 PASA -UNIVERSAL OUTFIT with Willard Wireless Battery 309.00 PASA -INTERMEDIATE RECEIVING OUT- FIT $221.00 Kennedy Intermediate Receiver -type 200 $125.00 Western Electric Headset-type 1002-C 15.00 One Detector Tube 5.00 B Battery . 3.00 Edison Storage Battery -5 cell B-4 75 amp. hr. 65.00 Antenna Equipment _ 8.00 PASA -INTERMEDIATE OUTFIT with Wil- lard Wireless Battery $184.00

PASA-BROADCAST RECEIVING OUTFIT_.-- $139.00 Kennedy Short Wave Receiver -type 281 _ $ 80.00 Western Electric Headset -type 1002-C 15.00 One Detector Tube 5.00 B Battery 3.00 Willard Wireless Storage Battery -6 volt 80 amp. hr 28.00 Antenna Equipment 8.00 Note. The PASA outfits are the bases on which the more complete outfits are built up, and may there- fore be added to as desired in order to obtain complete outfits. ALTA -MAGNA LOUD SPEAKING OUTFIT- type A $241.00 Magnavox Loud Speaker -type R-2 with 18" horn $ 85.00 Magnavox Three Stage Power Ampli- fier -type AC -3 110.00 Amplifying Transformer _ 7.00 Three 5 watt Power Amplifying Tubes 24.00 108 Volt B Battery 15.00 ALTA -MAGNA LOUD SPEAKING OUTFIT -type B $163.00 Magnavox Loud Speaker -type R-3 with 14" horn $ 45.00 Magnavox Two Stage Power Amplifier -type AC -2 80.00 Amplifying Transformer 7.00 Two 5 watt Power Amplifying Tubes 16.00 108 Volt B Battery , 15.00 ALTA -WEST LOUD SPEAKING OUTFIT $179.00 Western Electric Loud Speaking Out- Altissimo Receiving and Loud Speaking Outfit $740.00 fit type 10-A $161.00 Kennedy (This is complete with tubes and power amplifier) Universal Receiver -type 110 $250.00 130 Volt B Battery 18.00 Kennedy Two Stage Amplifier -type 525 85.00 BATTERY CHARGES Western Electric Headset -type 1002-C 15.00 Homcharger Rectifier-10 ampere 50 One Detector and Two Amplifier Tubes 18.00 cycle $ 20.00 Magnavox Loud Speaker -type R-2 with 18" horn 85.00 Homcharger Rectifier -10 ampere 60 cycle 20.00 Magnavox Three Stage Power Amplifier -type AC -3__ 110.00 Tungar Rectifier -2 ampere 50 cycle 23.00 Amplifying Transformer 7.00 Tungar Rectifier-2 ampere 60 cycle 19.00 Three 5 -watt Power Amplifying Tubes 24.00 Tungar Rectifier-5 ampere 50 cycle - 36.00 B Batteries Tungar Rectifier-5 ampere 60 cycle 30.00 24.00 Edison Storage Battery -6 cell 75 amp. hr 78.00 STORAGE BATTERIES Tungar Rectifier -5 ampere 50 cycle Edison 5 cell B-4 75 ampere hour 6-7h 36.00 volts $ 65.00 Antenna Equipment 8.00 Edison 6 cell B-4 75 ampere hour 7 to Altissimo Outfit with 60 cycle Tungar Rectifier 9 volts .. 78.00 $734.00 Prices subject to change without notice. Paul Franklin Johnson August, 1922 Radio Journal Page 127

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Volume One AUGUST, 1922 Number Three CONTENTS Radio Journal is published monthly by Radio Journal Publishing Company, 113 MR. O. R. REDFERN Frontispiece Stimson Building, Los Angeles, EDITORIAL COMMENT 129 California. AN EXCELLENT SHORT WAVE RECEIVER EDITORIAL BOARD SAMUEL G. MCMEEN 130 Editor HUGH HARLAN Associate Editor...._.._W. L. POLLARD ROMANCE OF RADIO-PART II - - - FLORENCE G. ROGERS 133 Technical Editor....LEx B. BENJAMIN AMATEUR RADIO EXPERIMENTATION - - W. L. POLLARD 136 Assistant Editor_.FLoRENcE G. ROGERS Art Editor_.. __ C. H. DILLINGER RADIO INSTALLATION AND FIRE INSURANCE WM. W. WIDENHAM 139 SUBSCRIPTION RATES 6 months $1.50 AMATEUR RADIO CALL LIST 7TH DISTRICT 141 1 year 2.50 THE ARMSTRONG PATENT DECISION 144 2 years 4.00 Canadian or Mexican - RADIO RAYS 146 1 year 3.00 HOW NEWSPAPER BROADCASTING STARTED - - - - 148 Foreign, 1 year 3.50 150 Change of Address-Notify us of WAVE LENGTHS E. S. FARNSWORTH any change in your address. Be MIRANDY AT THE TUB-POEM - - FLORENCE G. ROGERS 151 sure to give both your old and new RADIO EQUIPPED MOTOR BUS 152 address. DIRECTIONAL RADIO 152 Because of the fact that intense QUESTIONS AND ANSWERS 153 interest in radio is sweeping the RADIO SIGNALS FOR AIRPLANES 154 entire country, causing a flood of RADIO-CARTOON - 155 inventive and research work, much of which will be duplicated, it is CAT WHISKERS 156 necessary to state that in the event RADIO'S PLACE IN THE SUN 157 of expressions of opinion and va- "ON THE AIR" 160 rious statements from contributors AN ARTISTIC HOME SET DILLINGER 164 and correspondents appearing in C. H. Radio Journal from month to month MOST POWERFUL RADIO TUBE 166 becoming the subject of litigation in INTERFERENCE MAJOR J. F. DILLON 167 courts, or of controversy in scientific BROADCASTING TECHNIQUE 168 circles, and which may involve ques- RADIO IN WAR STRATEGY 174 tions of the priority of invention and a comparison of merit of apparatus, NOTES ON RADIO REGULATION 175 the owners and publishers of Radio PUBLISHER'S PAGE 180 Journal positively and unequivocally disclaim any responsibility for any such expressions of opinion or par- tisan statements. "Entered as second-class matter May 19, 1922, at the post office at Los Angeles, California, under the Act of March 3, 1879." Chicago Representative Young & Ward 308 North Michigan Ave. New York Representative Geo. W. Stearns Flatiron Bldg. Copyright, 1922, by Radio Journal Publishing Company All rights reserved Printed in U. S. A. --iji IllúüüüüüiilllBi -_ 2_-=-. Y=

MR. O. R. REDFERN

U. S. RADIO INSPECTOR 7TH DISTRICT

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from listeners miles away are greatly prized. If you like Help Keep the Air Clean a certain singer write a letter to your broadcaster telling Broadcasting is a new means of communication, a him so. Give comments on her or his voice as you heard new diversion, and presents to the American public some- it,-whether the voice was clear, well modulated, etc., or thing with startling possibilities. Today the Air is Clean. whether it was distorted. Such letters aid the broad- A speaker broadcasting from KHJ, the Los Angeles caster in getting return dates, and make more certain a Times Radio Station a few weeks ago, laid great stress good program. Aid him if you can. upon the fact that the air is as yet unsullied. One may Each broadcaster is rendering a public service at his listen in to any concert or any speech broadcasted, and he own expense. A little appreciation is his only pay. Aid him by giving him a good now and then, by writing will find that concert or that speech clean. A parent need word a little letter now then, by helping him make his have no hesitancy and and in placing in the hands of his boy or service the more perfect. Be constructive. Aid him. girl a receiving set, and telling him or her to listen in at any time. The air is clean, wholesome, and unsullied. And, above all, for the good of radio, for the good of the A Municipal Problem dealer, the broadcaster, the amateur, the novice, and the Every so often this problem arises : How shall the professional radio man, let's keep the air clean! cities equip their fire and police automotive devices with radiophones? There have been a number of such in- stallations, but as yet there is no full general understand- Aid The Broadcaster ing as to what is the best way. If you enjoy radio concerts and speeches aid your Why not have a symposium, gathering together all the broadcaster in the production of such programs. details of what needs to be done, how it has been done If you want a certain kind of program or a certain so far, what are the particulars in which success has not style of music, and the broadcasters you can hear don't been met, and what can be done to finish the task ? supply that program or that style of music, don't con- "What needs to be done" is perhaps the simplest part demn radio, don't revile the broadcaster. Tell him in a of the problem. It is essential that the apparatus shall gentleman's way just what you want, and then aid him enable the fire -truck, the pump, the police ambulance or in getting it. the patrol wagon to communicate instantaneously with a If KOG, KFI, or KYJ, fails to deliver, tell the oper- central station of one or the other department, not neces- ator in charge, and try and tell him just why he does sarily while actually on the run, but most promptly when not deliver. Remember, he is on the sending end and at rest. The central station shall in turn be able to speak cannot determine how his program is doing unless some to any piece 'of apparatus having radio equipment, and one on the receiving end informs him. this wherever within the city limits that apparatus may The broadcaster is working under handicaps few be. The need of intercommunication between vehicles novices in the radio game understand, and because a cer of the fleet is not so acute, but such a need may exist at tain demonstration failed to come out plainly, or because times. certain stations fail to keep up to a high percentage of The problem of the central station for such a system efficiency, or because all the stations in town do poorly is about the same as that of building a broadcasting sta- for a day or two, we often hear the thoughtless con- tion of the present type, but fortunately the maximum demning radio, and telling their neighbors why radio is required range is small. The less that neighboring cities a failure. Remember, the broadcaster has his difficulties, overhear each other the better, so far as fire and police and it is not fair to knock. Let him know where he is apparatus is concerned.. It is in the vehicles that the failing, then aid him to rectify his errors or to mend his problem gets a little out of the line of regular practice. ways. And, don't knock. The aerial must comply with a number of rather trying If the radio program from each station does not con- conditions ; the radio devices must be able to stand hard tain selections sung by famous artists, remember that the traver, and there must be no need of tuning -adjustments broadcaster and the entertainer are giving their time, for after the first construction of the outfit. The ideal ar- your amusement, free gratis, and that famous artists are rangement will be one in which also there is no need of hard to get; that fifty -watt tubes cost thirty dollars filament -rheostats. apiece, and are difficult to obtain, and that the costs of The most likely source of knowledge about the best running a station are heavy at all times. Entertainers forms of aerials for fire and police apparatus is that sing for the publicity they get out of singing, and the group of amateurs who have equipped their own cars broadcaster sometimes has a difficult time to get anything with radio sets. And there is an amateur in our neigh- but phonograph music. If you know anyone who might borhood who once in a while has been using a radiophone want to sing over the radio take him or her to your wave -band that is wide enough to include more wave- favorite station and effect an introduction. If your lengths than any fire -wagon could encompass, no matter friend really can sing there will doubtless be a place on how often it turned corners. Maybe some of our readers the program. Be constructive, however,-don't kick. have had that experience and know what are the causes Aid your broadcaster! of broad bands with even continuous waves. There are many ways of aiding the broadcaster. A This magazine will be glad to be the clearing house for few have been suggested. Since singers sing for the pub- ideas on the subject, covering the art to date, the unfilled licity they get, they are pleased if someone notices their needs, and suggestions for the solution of the latter. Let efforts and comments by letter. A few letters to a singer them come along and we will do our best at this end. Page 130 Radio Journal --1 August, 1922 An Excellent Short Wave Receiver 139 SAMUEL G. McMEEN

Radio Journal readers will like Mr. McMeen's article, which, by the by, is the forerunner of a series which he is preparing exclusively for Radio Journal. Mr. McMeen is a consulting electrical engineer specializing in communication by electrical means. (No pun intended, Mr. McMeen.) He is one of the authors of the bulky volume, "Telephony," and of the telephone and telegraph portions of the "Handbook for Electrical Engineers." Follow directions in this article, and you'll have a "bully" good receiver, strong on selectivity.

voltage THIS is a description of a re- of 100, and a little better at tiary coil may very conveniently be ceiver adapted to wave lengths 200. brought out through the brass rod or from 150 to 800 meters. It is The primary and secondary coils are tubing on which the coil is carried, by wound one of the large family of re- with No. 28 cotton covered drilling a small hole through the side wire on a four -inch tube of firm ma- of the tubing and passing generative receivers, and no the terminal terial-bakelite or its equivalent pre- wires into the central bore and out at claim of originality in circuit design ferred-and it is of first importance the back end, as in Fig. 2. If solid is made. The circuit was first made that the arrangement of these wind- rod is used as the axis, drill into the known to me by Mr. Oliver Wright, of ings be that shown in the accompany- back end of the rod far enough to California, and the particular arrange- ing drawing. That is, the antenna side join the sidewise hole and so make a ment I have given to its elements is of the primary coil shall be nearest the path for the wires. The rotor should merely that which I have found to be grid side of the secondary coil, and be prevented from turning more than a satisfactory one. Very likely there separated from it two inches. Ft is on one complete revolution by stops on are other sets of electrical dimensions this separation that the set depends for the face of the panel. Otherwise the that would be satisfactory. its sharp selectivity. terminal wires may be twisted off by In the form here described the re- From the primary coil taps are an accumulation of revolutions. ceiver consists mainly of a primary, a brought out at the 30th, 45th, 60th and For the purpose of the rotor mount- secondary and a rotatable tertiary coil, 80th (last) turns. From the second- ing a separation of the secondary coil two condensers, a detector tube, and ary coil taps are brought out at the into halves should be made at the time a power tube used as an amplifier. It 25th, 45th, 60th and 80th (last) turns. of winding it. is able to operate a loud speaker satis- These taps are connected to switch An essential to the is factorily. best result The power tube in this case studs, permitting the quick selection of that the grid condenser shall be as is a VT2 made by the Western Elec- the required portion of either coil. close as possible to the grid of the tric Company, intended to operate on The tertiary coil of 50 turns is detector tube-electrically close, that a filament voltage of 6.5 to 7.5, but is mounted within the secondary coil on is. This can be assured by having no actually operated on six volts at a low a brass rod or piece of brass tubing, wire at all between these two elements, temperature. One is only barely able carrying a knob but not necessarily a attaching one terminal of the con- to see that the filament is aglow. The dial. The settings of the tertiary or denser directly to the grid post of the plate voltage of this type of tube is tickler coil do not make a dial a neces- detector tube socket. given by the makers as 350 volts, but sity, though some may think one a con- The plate circuit of the good results are obtained detector with a plate venience. The terminals of the ter - tube contains the tertiary coil at all

TERTIARY TURNS /l50 D BRIDGING JACK p BRIDGING JACKS r O CUT-OFF JACK p

a! Q 2 MEGOMMS TRANSFORMER > sew,' a PLUGS It1 POWER TUBE 80e u I AMPLIFIER .0005 MF DETECTOR ")0. TURN TuQnO 7 PLATES zg CURN

~-1I,I,Fis i: , 6 VOLTS ALL wit -mines of #26 COTTON COVERED ---eI1I1I1I1I1I+ WIRE B2,100 VOLTS Oe MORE

FIGURE 1. August, 1922 Radio Journal ---r Page 131 times, and either the telephones or the I say "temporary" because for the primary winding of the audio -fre- purposes of short wave reception, say quency transformer, depending on broadcasts and amateur working, the whether the cut-off jack of the detec- use of radio frequency elements is not tor tube is plugged into or not. The necessary. Indeed, the gain from such use of both a bridging and a cut-off use is small, and not needed. For jack at this point, and two or more long -wave and long-distance working, bridging jacks after the amplifying however, the facts are different, but power tube gives complete flexibility. this particular receiver is not the hest Contrary to some popular opinion, for long waves. there is no need of wiring the jacks so Now for a few constructional de- as to put headsets in series when two tails for those to whom the making are used. It is possible to get good of things is a source of pleasure. results even with the headset in the Rotors are practical when merely bridging detector jack and the loud wound on sections of cylindrical speaker on the amplifier, and in some tubing, but of course the more work- reception this has an advantage. The manlike form is that in which the headset speaks too loudly for comfort surface of the rotor ring is a portion on the last jack in many cases. of the surface of a sphere. This form The two variable condensers are can be turned from a single piece of chosen of such sizes as to give the re- FIGURE 2. BRINGING OUT MO- birch, but there is an added charm, quired range and at the same time to TOR WINDING TERMINALS. perhaps mainly mental, in using lamin- make the settings as accurate as possi- ated material made up of three pieces ble without the use of verniers. There Primary switch, 45th turn. of birch three -eighths of an inch appears to be no need of the latter Secondary switch, 60th turn. thick, the grain of the middle piece refinement, though slow -turning de- Primary condenser, 30% of maxi- crossing the others, and glued together vices can be added on -the front of the mum. with casein or other glue. Casein glue panel if desired. The primary con- Secondary condenser, 30% of in its present grade of excellence is denser has 31 plates and the secondary maximum. a war -heritage that all amateur physi- has seven. The stationary plates of Tertiary coil, about as shown in cists ought to know and use. It is the primary condenser are grounded drawing. made from milk. It is mixed cold and and the rotating plates connected to In the actual device under descrip- used cold. Joints made with it can be the blade of the primary -coil switch. tion here the tuner portion and the soaked and boiled in water and will The stationary plates of the secondary tube portion of the apparatus are still hold. The wood can be worked condenser are connected to the grid mounted on separate panels and en- three hours after the joint is made. condenser and the rotating plates to closed in separate cabinets. This is The cost is almost nothing. the negative side of the A battery. not an essential arrangement, as all The rotor may be finished in shellac These precautions are to minimize the the parts could be in one cabinet, but or may be treated first with paste wood effects produced by the capacity of it has the advantage that one can in- filler and then with varnish of the one's body, and they are very success- sert later at any time one or more turpentine variety. But no varnish or ful in this set. stages of radio -frequency amplifica- shellac or other dope is permissible on In tuning to any wave-length one tion between the tuner and the de- the windings of stator or rotor. It is has several choices of settings of coil tector. The tube, socket, rheostat and necessary to have capacitance in series switches and condensers. For maxi- radio -frequency transformer can be or in parallel with the inductances, mum loudness set the coil switches to assembled on a small panel with its but it must be capacitance under con- include the more inductance and the binding posts located to conform to trol, which distinctly is not the case condensers to give less capacity. For the two sets on the adjacent edges of when it is applied between turns by reception of broadcasting at 360 the tuner and detector panels, so that the use of resins. Leave the capaci- meters a good setting of these ele- the temporary insertion of radio-fre- tance tasks to the variable condensers. ments is the following: quency amplification is quite simple. The bakelite panels for the tuner

FIGURE FOUR- SHOWING THE "GIZZARD" OF MR. McMEEN'S SHORT-WAVE RECEIVER Page 132 Radio Journal August, 1922 thick. The former is seven by eleven screws. inches On first mention the use of set here described for exclusive and the latter seven by nine such screws may seem broad- inches. They are to be unsightly, cast reception, not caring to listen for brought to a beau- but it is not so. 'Well countersunk tiful velvet finish by the simple use they ships or amateurs. In such a case all come very nearly adding to the but the of 00 steel wool, rubbed in straight good appearance, used turns for 360 meters may lines and the corners are be omitted from lengthwise. On this matt sur- easier for the amateur the primary and face worker to ' secondary coils. That the whole arrangement of holes finish truly in that is, the primary can be way than with glue. will have 45 turns and the secondary laid out in pencil and all the Some of the best insta drilling done from ament makers will have 60, with consequent greater the front. Careful are using the screw method today. drilling generally will leave Of compactness. holes clean course the end grain of the wood is on both sides, but by drilling from the exposed If the set, further, be made with when the corners are merely the original intention front one puts the rough edges of lapped and of using a power holes, screwed together, but the tube as an amplifier, and if any, on the back. Laying end grain of mahogany not for gen- out in pencil finishes well eral experimentation with tubes in keeps both sides clear of if treated with paste filler. layout -scribing in the end. general, then there is no need of using Three -eighths inch is a satisfactory A super -bottom is fitted to the de- a rheostat on the last tube at all. thickness for the cases of the sets. tector panel, this being attached to the Obviously there will be no danger of Of all the ornamental woods, ma- panel at such a location that it will over -energizing the filament of a 7.5 hogany is least liable to warp and just slide in upon the actual bottom. volt power tube when directly con- split. Its ease of working and the It is not attached to any other part of nected to a three -cell storage battery, good finish it takes make it desirable. the set than the front panel. unless the tube be in circuit while the battery is receiving The corners of the cases may be There is a vigorous ending just the possibility that of a full charge, glued or fastened with flat -head some one may -a practice which it care to reproduce the is hoped is not general.

FIGURE THREE-SHOWING THE FRONT OF MR. McMEEN'S RADIO SET

HAIL THE RADIO SLEUTH himself an antenna was the source of opolization mischief. of the sources of supply The palm for the inauguration of necessary in constructing radio ap- The public service company was aerial detective work goes to Los An- paratus. glad to know of his discoveries and We geles. Ned Lawrence, writing in remedy them believe that the best interests of the in the first two cases, radio communication Los Angeles Herald, tells of the self- and the small boy was duly penitent. are served by the establishment of various local imposed detective activities of a radio limited power BROADCASTING stations, classified ac- fan whom one interference too many ORGANIZA- cording to service, operating on def- rendered desperate. He fitted up his TIONS UNITE inite wave lengths, geographically automobile with a small antenna on Announcement has been made of placed at distances far enough apart to top of the car, adjusted the formation of the Radio Broad- minimize interference, and this so- his head- casting Society ciety pledges phones, tuned his set to the disturbing of America composed itself to assist and en- signals and of twenty-five broadcasting organiza- courage the establishment of such sta- started on his way. He tions circled about in his territory, tions in the United States. In part its throughout the country. moving declaration of principles always toward the point where the in- is as follows : Every person in any way interested terference seemed most pronounced. We believe that radio communica- in radio is admitted to membership. tion should at all Finally he would locate the signals in times be under the The Radio Broadcasting society, a comparatively small regulation of our government and for- which will further area, and then ever the art of radio in would pursue subsequent investiga- so safeguarded by law that it every way, believes that the will never fall best in- tions until he located the origin of the under the control of terests of radio communication are disturbance. any selfish group or monopoly. served by the establishment We of various believe that the privilege of local limited power stations operating In three experiments he traced the listening in should be available trouble to the on definite wave lengths. to a faulty transformer on the public and the American boy at all electric One of the important aims of the -power wire, to a high tension times without charge, and we call to society wire which had is to have all patented radio rubbed against the our standard all amateur and other devices for branch of a tree, and in transmitting and receiving the third in- radio organizations that oppose the placed freely upon stance a small boy's attempt to build the market without proposed system of rental and mon- operating or receiving restriction. August, 1922 Radio Journal Page 133 Romance of Radio By FLORENCE G. ROGERS

This is the second installment of Mrs. Rogers' very interesting History of Radio. The first part appeared in the July Radio Journal. Radio is the Marvel of the Age. Herein are traced the early developments that preceded the present achievements in radio. Dip into it-it's a real Romance. More will follow in the September issue.

the of O many wonderful made to cross a river without other cient writ it is termed "stone in- conductors than the water itself ; but Hercules." discoveries and of ventions have been it was not until the last autumn that At approximately the same time result I had the leisure to make a series of Faraday's discovery Henry, an Amer- the of acci- inde- dent-if accident we experiments to ascertain the law of ican, arrived at these same laws its passage." pendent of Faraday's work. This was can call it-that it but was quite true to In 1845 Michael Faraday, in the a step in the right direction, course of his researches in light and electro -magnetic induction did not form that an acci- progress dent should have magnetism, made many experiments inaugurate any spectacular which resulted in the discovery of the in wireless communication. Perhaps turned Morse's demonstration of his of and laws of the electro -magnetic induction Faraday was nearer to the secret electric telegraph into a discovery modestly demonstration of radio. At the time mentioned in a previous chapter. The radio in his paper which he properties of magnetism per se were entitled "Thoughts on Ray Vibra- that Lindsay and Steinheil were carry- all Morse was no new discovery by any manner of tions," in which he suggested that ing on their experiments etc., was his efforts upon his sys- means. The Northmen employed a radiation such as light, heat, concentrating vibration of the tem of electric telegraphy. In 1842 magnetic compass in the year A. D. due to a high rate of requested him 868, and the magnet went much far- lines of force in the magnetic field. the American Institute to him but to his system, and this he ther back in history than that com- Romance drew near demonstrate him as she was doing when the anchor episode paratively recent date. In ancient merely breathed upon under Sanscrit writings-and Sanscrit has passed, and therefore Faraday stopped occurred. He had laid wires only water between Governors Island and been a dead language for a matter of short of certainties and achieved for his demonstration, 2200 years-the magnet was called unformulated speculations upon which Castle Garden This other was no sooner had he got his apparatus "the precious stone beloved of Iron." another might build. but an English mathe- to working than the wires were cut off In the Talmud it is called the "stone Clerk -Maxwell, of an anchor on a vessel of attraction," and elsewhere in an - matician of Cambridge. by the lifting content to fol- in the channel where they were laid. .Clerk -Maxwell was low his Star which remained in the Morse related the episode in a letter rarefied upper air of pure science, to Congress in 1844,-a document dreaming to reflect its glory and the which conclusively, and we might say world well lost. He began a series of authoritatively dates America's first experiments which in 1861 bore fruit experience with radio,-although he in the Faraday -Maxwell electro -mag- did not go further than to satisfy him- netic theory of light. This was the self of the fact of its existence. theory of the vibratory transmission "In the autumn of 1842," he wrote, of magnetism, electricity and light in "at the request of the American In- one common ether. Prior to this time stitute, I undertook to give to the pub- scientists knew practically nothing lic in New York a demonstration of about the ether although they reasoned the practicability of my telegraph, by that it must exist and that it inter- connecting Governor's Island with penetrated all space. They likened it Castle Garden, a distance of a mile ; to an incompressible liquid that was and for this purpose I Iaid my wires both tenuous and rigid. In the pres- properly insulated beneath the water. ent discussion of the subject it is in- I had scarcely begun to operate, and teresting to quote H. Poincare. "It had received but two or three char- matters little whether the ether really acters, when my intentions were frus- 'WIZARDS OF ELECTRICITY" exists," he says, "that is the affair trated by a vessel which drew them up MEET of the metaphysicians. The essential on her anchor and cut them off. In thing for us is that everything hap- the moments of mortification, I imme- PROFESSOR STEINMETZ, CHIEF CON- pens as if it existed, and that this diately devised a plan for avoiding SULTING ENGINEER AT THE GENERAL hypothesis is convenient for the ex- such accidents in the future by so ar- ELECTRIC COMPANY PLANT AT SCHE- planation of the phenomena." ranging wires along the banks of the NECTADY, N. Y., AND MARCONI, THE In '1864 Clerk -Maxwell presented river as to cause the water itself to ITALIAN WIRELESS WIZARD, PHOTO- before the Royal Society his theory conduct the electricity across. The GRAPHED AT THE G. E. PLANT WHERE that light and electricity were akin, experiment, however, was deferred THEY MET FOR THE FIRST TIME IN and in his paper he voiced his debt to until I arrived in Washington ; and on FIFTEEN YEARS. AND STRANGE TO SAY, Faraday in the words : "The electro- December 16, 1842, I tested my ar- THE TWO MEN DISCUSSED EVERYTHING magnetic theory of light as proposed rangement across the canal, and with BUT MATTERS ELECTRICAL, PREFERRING by him (Faraday) is the same in sub- success. The simple fact was then TO CONVERSE ABOUT THE' ALLIGATOR stance as that which I have begun to ascertained that electricity could be PETS OWNED BY STEINMETZ. develop in this paper, except that in Page 134 Radio Journal August, 1922 1846 - there was no data to calculate brilliant actuality. Some the velocity of propagation." accepted his runner of the phonograph. This was theory; others rejected it as complex the first instrument invented His and difficult that idea was that of one all-per- of comprehension much reproduced the human voice. He vading electro -magnetic field, any dis- as we today are applying these terms touched the hem of the turbance to garment of of which produces waves, the Einstein theory of Relativity. Romance with relation to radio and However, it when that all forms of radiant energy was much to have con- two years later he invented the in- such as heat, ceived of ..so tremendous light, etc., are in reality a theory as candescent light which formed the disturbances within this field propa- that of electro -magnetic waves, for basis for DeForest's others audion tube. But gated in the form of electro -magnetic were to come who would build this is getting ahead of our story. waves. He developed upon his speculations as this theory more he had built David Hughes is fully in 1873 in a treatise upon those of Faraday. a romantic figure on electricity in these early days of and magnetism, and while he predicted wireless com- In America Thomas Edison was munication. To him is accredited the the existence of radio waves, he ac- now started upon tually demonstrated his fascinating and invention of the microphone which is nothing. Twenty- wonder -provoking career as an in- similar in form to five years were to pass the Branly coherer. before scien- ventor. At about the time of the Edouard Branly, by tists were destined to the way, was born do more than to presentation of Clerk -Maxwell's paper in Amiens in 1844, and sail the vast sea of theories before in recognition he was working on the quadruplex of his part in radio he had bestowed Hertz was to arrive to chart it. Clerk - telegraph in a little shop in Newark, upon him the enviable honor of being Maxwell stopped short with the idea ; New Jersey. In 1877 he produced the made an officer in the Legion he did not carry it forward into a crude of instrument that was the fore - Honour. He was elected a member of the Academy of Sciences at Paris in 1911. While Hughes was experimenting with his microphone he observed phenomena which he concluded to be due to invisible electric waves. Later Hertz noticed the same phenomena, and related them with the theories presented by Clerk -Maxwell. Hughes, however, did not carry his thought far enough for this. He continued his investigations and constructed appara- tus by which he succeeded in tele- phoning in 1879, without wires, over a distance of several hundred feet. Many homely things went into the construction of this apparatus such as knitting and sewing needles, ash trays and the like. Although it did not present an appearance of efficiency, nevertheless he repeated his experi- ments with it before the president of the Royal Society, Professor Stokes, and Professor Huxley. These gentle- men chose to be supercilious, and scoffed at his theories and his claims. He allowed himself to become inocu-

lated with the . virus of their scep- ticism, lost faith in himself, became discouraged, and gave up his efforts. Romance here proved herself a jade, for had she companioned Hughes past the forbidding reception of Stokes and Huxley his brow would have worn some at least of the laurels that crowned Hertz, Marconi and others whose names are lauded today in radio achievement. In the following year, 1880, Alex- ander Graham Bell was chosen by Romance to enter the charmed circle of radio. Bell had successfully demonstrated his telephone, and two years later he and Sumner-Tainter worked together on an Photo by Underwood apparatus to & Underwood, N. Y. which they gave the name "Photo- tone" WHAT KIND OF A THINGAMAJIG, for the reason that by its means DOODAD, OF WHOOSIT IS THIS THAT LEE DE FOREST IS FROWNING sound was reproduced through the AT? WE CAN PARDON THE FROWN, FOR THE CONTRAPTION medium LOOKS LIKE A CROSS BETWEEN of light. At first sunlight A TELEPHONE AND A NICKELODEON MOVIE TO US. was used, BUT NO MATTER WHAT IT LOOKS LIKE-IT and later the light from an HAS SERVED ITS PURPOSE, FOR IT IS A arc lamp. WIRELESS APPARATUS WHICH DE FOREST Mercadier, who himself EXPERIMENTED ON IN THE EARLY was conducting intricate STAGES OF RADIO DEVELOPMENT. experiments in this same field, suggested the name Page 135 August, 1922 Radio Journal

SENOR GUGLIELMO MARCONI, THE ITALIAN WIRELESS "WIZARD" IS SHOWN (AT THE LEFT) SEATED IN THE WIRELESS ROOM OF HIS YACHT "ELETTRA" WHICH IS PIC- TURED BELOW. DURING HIS RE- CENT TRIP. ACROSS THE ATLANTIC MARCONI M A D E SEVERAL AT- TEMPTS TO REACH THE PLANET MARS BY RADIO, MARS BEING AT

"radiophone" because the thermal as well as the light radiations were em- ployed. Even with the light from a candle it was possible to reproduce a faint sound, although the apparatus was primarily devised for the use of sunlight. An essential part of this THAT TIME VERY apparatus was the selenium cell on CLOSE TO THE which the beam of light was focused, EARTH. AT THAT the peculiar properties of which had TIME HE DID RE- by Willoughby been demonstrated CEIVE 14 MYS- Smith in 1873. TERIOUS MESSAGE The "photophone" was tested in the WHICH WAS BE- laboratories of the Bell Telephone LIEVED TO HAVE Companies, and some years after its BEEN SENT FROM invention Hammond B. Hayes, an en- MARS. gineer connected with the American Telephone and Telegraph Company, conceived the idea of attaching the telephone wires to the wires in the electric arc light, and with this ar- rangement the voice was transmitted several miles. This so-called "light It would seem that at this time Ro- nals were not transmitted to any great telephony" reached its highest devel- mance was seeking the wide world distance. Romance did not linger long opment through Ernest Ruhmer, al- over for someone who would follow enough to give to Dolbear the glory of though twenty miles is said to have her gleam without question, without closing the circle of discoveries, theo- been the extreme limit to which the fear of scoffers,-that gleam that ries and inventions. voice has been carried by this method, would lead into the effulgent glory of In England she sought far and and open spaces and clear atmosphere the full discovery of her secret of wide, and chose the Chief Electrician were essential to its success even with- Radio. In Boston, in . 1883, she in- of the British Postal Telegraphs for in this restricted area. It was used trigued Professor Dolbear of Tufts some of her favors. William H. successfully on ferryboats in America College so far as to cause him to grasp Preece, afterward knighted, will ever for the transmission of messages be- the significance of the aerial for bring- be remembered gratefully for his open tween the ferry and the shore, and ing in wireless signals. His system of mind to new things, and more par- also by the United States Signal wireless communication required kites ticularly for his encouragement to Corps. Germany also found it prac- to elevate the wires, because he had young inventors such as Bell, Mar- ticable for light -house work on the found that the signals were more coni and others less famous. His en- Wansee near Berlin. The necessity powerful at a height. His system is couragement of Marconi belongs to for a clear path for the light ray to very suggestive of Marconi's antennae, the Italian's part of the story. Preece, travel, together with its comparative- bringing in sounds through a tele- however, carried on investigations in ly short range, imposed insurmount- phone receiver connected with one end radio on his own account. able barriers to complete commercial of an elevated wire, the other end success. being grounded. Apparently his sig- (Continued to Page 170) Page 136 -- Radio Journal ---_ August, 1922 A rnateur Radio Experimentation Gy, \X'. L. POLLARD Hail! His Majesty, the American Boy! The sweetest and roughneck that ever drew most lovable breath. He sees everything, knows everything, and does everything. Just now he is devoting all his new play-fellow-Radio. dynamic energy to his wonderful He is the amateur of whom you read so much. This article tells the value of what he is doing.

AMATEUR radio experimen- If you are the mother or the father tron many times as tation of a sensitive as it had has been going on con- boy amateur remember these been before, much experimentation tinually since the first things. Remember young Hanson of had gone dis- Los on to produce this result, covery of the Angeles, who, boy amateur that different people Hertzian wave. he was, experimenting working along differ- Young and tinkering ent lines. With the grid in Marconi, in the nine- with radio sets continually, the elec- ties, started developed tron tube that tube became the most out as an amateur experi- the audion tube for deaf people, per- menter. He is still sensitive agency known to radio 'sci- experimenting, fected a device for the steering of ence. During but, while in 1897 he was dreaming ships the last few months of into a harbor that made it pos- practically everyone sending wireless messages the great sible for a captain who has given distance of a ship to steer any attention to radio has become of ten miles, and sitting up his vessel into New York ac- at night experimenting Harbor quainted with the crystal set. Many with various from the open sea, though at the time have also learned forms of crude transmitting devices in he was the value and the blindfolded. Remember de - uses of the audion set, an effort to achieve his dreams, he Forest, Armstrong, and have won- Marconi, Kennedy dered why the audion gave now does his experimental work on and a score results, not a of other young fellows obtained with the crystal. The palatial yacht, and measures radio who, by their radio experimentation, answer waves one is apparent when one learns that the hundred and fifty thousand made possible the present status of metres long. Times de Forest audion tube, operating in an have changed ! radio. Armstrong A few years ago an amateur circuit, is 5000 times more radio The United States Government sensitive than the ordinary fan, named Armstrong, was doing rec- crystal set, some experimental ognizes the value of the boy amateur and 1000 times more sensitive than the work in the wire- experimenter. very best less laboratory at Columbia Various bands of wave crystal on the market. And Univer- lengths are definitely this is all the result sity. Wireless reception to this assigned to him of experimenta- stage for his use, and when radio tion. Who knows but had been found practical only when broadcast- that the time the sending ing seemed to threaten the boy the will come when we will have at our station was located a short government, command distance away. The and its agents in charge of some agency for radio de- principle of tak- radio (the Radio tection that ing messages out of the inspectors in the sev- will exceed the audion air had been eral districts), stepped tube in its sensitiveness firmly established, crystals and in and set up as the audion tubes definite rules governing broadcasting tube surpasses the crystal were both in use, but long range re- of today? ception that protected the amateur from ag- The boy amateur, graduating into the was impossible. Armstrong gression. engineer was tinkering with Large manufacturing and class, will be the person to his set, trying vari- distributing discover the ous circuits, various hook-ups, agencies handling radio new principle if it is dis- various supplies recognize the importance covered. plans of reception. He wired his re- of the boy amateur, and there is Within the ceiving instrument in a certain way, hardly month I have talked with such an ,agency in the United States about fifty boys. when, to ! stations that Each has been ex- had formerly that does not have perimenting been weak and scarcely, audible several amateur ex- on some phase of radio. came perimenters at work developing Each has in strong. He listened further, and radio had his own idea as to what stations supplies or figuring out means of mar- the next year is going to bring never before heard were keting forth strong. A new principle such supplies. in radio development, but each is con- had been dis- vinced covered. Amateur experimentation The time the boy spends on radio that radio frequency amplifica- tion is going had again achieved. Armstrong did experimentation is time well spent. to be the secret back of not stop. New principles Devices perfected by amateur radio the next sensational development. have been Since studied out by him, and it experimenters aided our armies greatly each boy had about the same is now ru- idea I sought mored that Armstrong has a super- while warring in France. Our naval out a few of the sets regenerative circuit units would have been far these boys were working on, and I which is said to less effi- found make a receiving set of two electron cient had it not been for the wireless that each was working hard to perfect some tubes a thousand or more times as sen- appliances developed by the radio phase of radio fre- sitive as the same tubes amateur. quency. Each boy was going about would be us- his ing the plain Armstrong regenerative task in a different manner, but all Radio development is still in its be - were circuit ; more experimentation. working on the same principle. gi nnings. The next decade will see Hundreds and perhaps thousands I then sought out a few of the best of ra dio applied to many walks of life radio engineers new angles, or new principles, in radio wh ere in Southern California_ its use is undreamed of at this and asked them what have been brought about by the ama- tim e, but in their opinion within the realm of commu - would be the next great teur experimenter, and the great bulk nic ation alone there radio prin- are thousands of ciple developed. "Radio Frequency of the radio progress of the future is ra dio secrets waiting to be going uncovered, will come next." This statement was to come from this same amateur an d for each of these secrets unfolded who lives radio, unanimous. Again the boy amateur is dreams radio, and the re will be literally thousands of justifying makes himself a regular nuisance himself. Perhaps it will not ho urs of experimentation necessary. be a around the house with his wires boy amateur who discovers the and Be fore Dr. deForest put a grid into secret back - of radio frequency and his bakelite. the electron tube and made the elec- harnesses that principle of radio re-

a. .;_,_. August, 1922 Radio Journal Page 137 ception, making it practical for the tube of today. It is not inconceivable experimentation before it can be suc- novice,-fool proof, as it were,-but that some one will come along within cessfully put on the market, but unless a year and invent some form of radio all signs fail it will eventually come if it is not a boy amateur who does it, reception that will far surpass , the au- on the market, and with the experi- it will be some engineer who was a dion, but to do this much experimen- mentation along similar lines that will boy amateur ten years ago. The thou- tation will be necessary. immediately follow, it is not far- sands of boys now devoting many The best form of amplification now fetched to say that within another year hours each week to a study of this known is by the audion tube. A few or two it will rival the amplifying tube principle are bound to find out some- days ago I listened to a little device in the production of sound volume. thing about it, and their study is going that for clearness of tone was equal From Maine to California, in every to be of great aid to the engineers who to any audion I had ever heard. This state, city, or hamlet, you will find the eventually master this principle and device was attached to a simple non - boy amateur, and many of these young develop it for use. regenerative detector, yet produced a chaps are experimenters as well, Boys can serve radio well by experi- volume- of music and speech loud though, of course, a large number are mentation along many lines, such as enough to fill an ordinary sized room, content with their radio work when the elimination of static. Marconi, it equivalent, I would say, to a two step they have succeeded in hearing is rumored, has developed a filter that amplifying unit. No tubes were em- through their home-made sets. The eliminates static. However, this ru- ployed. The device is simple, small, true experimenter, however, is never mor does not prevent John Smith, compact, and inexpensive. Its inven- satisfied. To him the accomplishment aged anywhere from ten to twenty- tors will have to do some laboratory of one object serves but as the start - five, experimenting along these lines and actually developing such a filter. There is directional sending to be studied out, directional reception, se- lective reception, coil and loop antenna to be conquered, and' a thousand and one other phases of radio sending and reception that need improvement, and the boy amateur can be of great aid in solving each one of these problems. Recently there has been much talk of sending pictures by radio. In fact, still pictures have been sent, but these have not been very clear. Pictures as they are now sent employ the same principle used in making a half tone on copper plate, i. e., a principle where the surface of thg picture is cut up into a fine screen with thousands of tiny dots correctly shaded, each dot having a certain degree of shade; when these are assembled in proper form the picture appears. There are other means of picture transmission, some of which are used in sending pic- tures by wire for newspaper use; but due to the fact that it takes a long time to telegraph, or wireless the thousands of dots required in the make up of a picture, only small simple pictures can be sent. Motion pictures by wire, or television, is considered imprac-' tical with present methods. It was a boy amateur, a young chap of about eighteen, who perfected the sending of still pictures by wire, and by wireless, and what young Le Roy J. Leishman did for the still picture some other young chap may do for motion pic- tures. Leishman believes motion pic- tures by radio to be impossible, but there were doubtless others who, six or eight years ago, when Leishman was experimenting with his telegraph picture project, would have declared the transmission of any picture by wire an absurdity, utterly impractical. According to Leishman moving pic- tures will never be sent by wire or by radio there is developed some until WARM THE COCKLES OF ANY HEART. agency for the sending and detection HERE'S A TYPICAL KID WHO WILL ONE'S of energy which is a thousand times OF COURSE JACKIE COOGAN WOULD BE INTERESTED IN RADIO. WE'LL WAGER HE as rapid and sensitive as is the audion HAS TAKEN HIS SET TO PIECES TO "SEE THE WHEELS GO 'ROUND." Page 138 Radio Journal --- August, 1922 ing point for experimentation along foremost experimenters of the pres- different channels to produce development of the steel and iron in- some-. ent day. The boys who come into it dustry. thing else. are Radio is young, however; but welcomed, are aided, and if a it has gone far. member wants Radio has developed In practically every city of any size to do experimental as far in twenty years as the in the work any other member steam United States there is an ama- will assist engine' developed in half a century- teur radio association, composed of him in any way possible. The ex- perimentation and this rapid development has come boys and young men, and occasionally that has been done by about because, where with the an older members of this steam man, which has for its prime organization has engine only a few mature minds were purpose the development of rádio. Get gone far in the 'upbuilding of radio interest working on its principles, with the ra- in touch with this association. Learn in the United States, and fur- dio work ther experimentation thousands upon thousands what its objects and its purposes are. by these same of boy amateurs have been working. Become members, or by new acquainted with its leaders members, will It is your duty as a father or a mother and its members, and by so doing you carry the radio development onward. of an interested If you have boy, or as a plain will learn something of the back- a boy interested in radio American citizen, to keep these urge him to join boys ground of radio. In Los Angeles the this organization, everlastingly at it. The product of association meets twice a month, and then encourage him in experimenta- their tion. work, the progress of their .ex- at each meeting there are upwards of Give him the proper urge, and perimental work are needed. a hundred boys, all eager to leas n, all if he has any interest, as soon as he gets into the atmosphere Help the good work along however bent upon getting the best out of radio, of the radio and whenever possible. all putting their best into the game. association, he will commence to do They are a straight-shooting, square - things, for, essentially, the members of this organization living set of young fellows. They are doers. In England the have big radio companies to be, for, in a large measure Amateur radio experimentation is do not sell radio apparatus. They they are on their honor to rent obey cer- necessary for the development of the it. Several broadcasting stations are tain rules, to keep their sets tuned radio game, and the development of to be erected throughout sharply, the British to keep off all waves except the radio game is essential to the Isles, and daily programs, including the ones assigned them, a and to other- proper welfare of our nation. The domestic and continental news service, wise obey the radio laws and uphold Army, the Navy, and other branches will be supplied. their government inspector. Any boy of the government are anxious that * * * who affiliates with this organization is the amateur do as much experimental Here is a problem for statisticians taking a step forward, both as to his work as possible, and it behooves the to solve : radio work and as to his education in Based upon the develop- individual to aid in this matter by en- ment of civilization other things that count. couraging and the growth the boy wherever possible. of knowledge as a result of the inven- This organization is the nucleus Radio is destined to revolutionize tion of the printing press, what will around which_ radio is developing. civilization as did the steam engine ; be the ratio of growth due to the ac- Among its, members will be found the electricity; the automobile; and the tivities of radio?

Photo by International Newsreel DESPITE ITS LOOKS-THIS IS NOT A MODEL OF 'A NEW KIND OF BABY CRIB. IT'S A RADIO SEARCHLIGHT, AND SEARCH US, IF WE CAN FIND THE LIGHT. GUGLIELMO MARCONI INVENTED IT AND HE SAYS RADIO WAVES CAN BE DEFLECTED LIKE !LIGHT WAVES AND SENT IN A GIVEN DIRECTION INSTEAD OF BEING SCATTERED. THE INVENTOR THINKS THE INSTRU- MENT CAN BE UTILIZED TO RID THE SEA OF ITS TERRORS. WITH A REVOLVING REFLECTOR THE TRANSMITTER WOULD CON- STITUTE A RADIO LIGHTHOUSE CAPABLE OF FLASHING GUIDING SIGNALS TO VESSELS NEARLY ONE HUNDRED MILES THROUGH FOG AND DARKNESS. August, 1922 Radio Journal Page 139 Radio Instailation and Fire Insurance

139 WM. D. WIDENHAM

New ideas and inventions mean new rules and regulations All of which means growth and progress. And that's what we want. "The old order changeth," said the savant. "Gosh, ain't radio goin' some?" says the enthusiastic boy. And they both voice the same truth.

THe experimental activities on the part of beginners in the radio art have stirred the bureau of standards to the ex- tent that that department has made revisions and amplifications of the national electrical fire code to cover the increased fire risk. The re- visions together with amplifications, will become permanent after Septem- ber first. Most of them are at present in effect, and failure to observe them will result in the loss, of insurance. Naturally the radio student is inter- ested in experimentation with lighting circuits and other high voltage sys- tems, and in installing his receiving set he often does not realize,, or does not care, that his method of installa- tion is increasing the fire hazard. The law has taken a hand in the control of the installation of receiving sets to the extent that it places bounds upon the nearness of light and power wires. One of the main provisions pro- hibits antennae crossing over or under electric wires of more than 600 volts, Photo by International Newsreel or being placed in such a way that FROM NEUEN, GERMANY, TO RIVERHEAD, LONG ISLAND, IN 1/20 OF A SECOND, they may come in contact with power IS SOME FLASH, WE CONTEND. SUCH IS THE RECORD OF THE WORLD'S LARGEST wires. Soldering of splices and joints RADIO STATION NEAR BERLIN. THIS PHOTOGRAPH IS THE FIRST EVER TAKEN OF also is ordered, unless they are made THIS STATION AND SHOWS THE SENDING ROOM WITH THE GIANT ACCUMULATOR. with approved clamps or splicing devices. quired to erect an aerial costing less will maintain a permanent separation. The size of' the antennae will depend than twenty dollars, so the average Use the non-conductors in addition to largely on the spai. For the ordinary amateur aerial consisting of a few any insulation on the wire. Lead-in receiving antenna about 100 feet long, strands of wire on the house or garage wires must enter a building through No. 14 gauge, soft drawn copper wire is not taxed. On the other hand the a non-combustible, non -absorptive, in- may be used, or any other wire of erection of an aerial at a cost of from sulating bushing. equivalent strength. Keep in mind twenty to seventy-five dollars inside Although desirable from a signaling that where the span is long or where the fire district requires a permit cost- viewpoint to prevent partial grounding the antenna crosses other wires, it ing one dollar. For erecting any in wet weather, these rules do not re- should be larger. The requirements aerial at a higher cost than seventy- quire the insulating of lead-in wires for soldering or using approved splic- five dollars the fee is one dollar and a except where they pass through the ing devices are made to minimize pos- half. building wall, where a bushing is spe- sibility of antennae falling on other To be on the side of safety the lead- cified. The reason for this is to pro- wires. in wires must be of copper or some tect against possible contact with In order to obtain a good result, the approved metal wire such as copper - wires, pipes, or any other grounded outdoor antennae should be of rugged clad steel that will not corrode exces- metal which may be concealed in construction, held securely in place sively, and in no case should they be walls. and kept well away from electric light smaller than No. 14 B & S gage ex- Proper installation calls for an ap- and power wire. It is advisable for cept that approved copper -clad steel proved protective device for the lead- the amateur not to make any connec- not less than No. 17 B & S gage may in wire that is properly connected and tions to poles carrying light or power be used. located, either inside or outside the wires. Those unfamiliar with electric Caution should be given in install- building. This protective device must wiring will do well to have antennae ing the lead-in wires on the outside of not be placed in the immediate vicin- and other apparatus installed by com- buildings so that they shall not come ity of easily ignitable stuff or where petent electricians. Antennae that are nearer than 4 inches to electric light it is exposed to inflammable gases, or installed inside of buildings are not and power wire unless separated dust or flyings of combustible mate- covered by the above specifications. therefrom by a continuous and firmly rial. The protective device called for In Los Angeles a permit is not re - fixed non-conductor, and in this way is an approved lightning arrester, one Page 140 -- -J - Radio Journal L--- August, 1922

MR. E. E. BUCHER Photo by International Newsreel WE ARE GLAD TO PRINT YOUR PICTURE, MR. BUCHER AND TO TELL OUR READERS THAT YOU ARE MANAGER OF THE SALES DEPARTMENT OF THE RADIO CORPORATION OF AMERICA, THE LARGEST OF ITS KIND IN THE WORLD. ALSO TO INFORM THEM THAT YOU HAVE WRITTEN SEVERAL HONEST -TO -GOODNESS BOOKS ON RADIO.

which will operate at a potential of ground clamp wherever the ground stated, it may be used as the ground 500 volts or less. The wire is use of cheap connected to pipes or piping. conductor for the protective device. home-made devices should be discour- By using the proper connections of In the September number of Radio aged. The fuses are not required, but the antenna to the ground the light- Journal an article will deal if installed should be between the lead- ning hazard is minimized. A satis- with the in and the lightning arrester. factory ground and properly run transmitting stations with relation to Even ground wire are of primary impor- the antennae, lead-in wires, protective though it may be desirable a tance. word of caution is necessary against grounding switch, protective ground Install the wires inside buildings in wire, operating the use of an antenna grounding a workmanlike ground wire, operating switch manner and see that unless the approved protective all wires are securely ground, power from street mains, pro- device is used. fastened so that If an antenna ground- they shall not come tection from surges and suitable ing switch is nearer than de- used, however, it must, 2 inches to any electric vices, to meet in its closed position, light or power fire insurance require- form a shunt wire unless separated therefrom ments. around the protective device. by some continuous and firmly fixed non- It is not necessary for the ground conductor making a permanent sep- wire to be insulated, We have on good authority that at but it should be aration. This non-conductor is in ad- a of copper or approved -clad very early date we will be enabled copper dition to any regular insulation on the to listen steel. If copper, the ground wire on three or four wave bands wire. Porcelain tubing or approved at our option, must be not smaller than No. 14 as the probabilities are B&S flexible tubing may be used for in- that the recommendations gage and if of approved copper -clad casing wires to of the Radio comply with this rule. Convention held lately in Washington steel it must be not smaller than It is not necessary for the ground No. 17 B&S gage. will soon become law. When this oc- One of the re- conductor to be insulated, but it must curs quirements is that the ground wire we will be able to listen on wave be of copper, approved copper -clad bands ranging from shall be run in as straight line as pos- steel or 285 meters to 425 other approved metal which meters, and thus if our receiver sible to a good permanent ground, will not corrode excessively is suf- under ficiently selected will be able to choose preference being given to water piping. existing conditions. It is imperative Under no condition use gas either a sermon, grand opera or jazz, piping for that the ground wire be not less than this grounding protective devices. You being made possible by the oper- are No. 14 B&S gage except that ap- ating of broadcasting not confined to water piping, but may proved copper-clad stations on three steel not less than or four different wave bands simulta- use grounded steel frames of buildings No. 17 B&S gage may be used. or 'other grounded metallic neously. work, in The ground wire may be run inside * * * the building or artificial ground such or outside of the building, but when A $20,000,000 American as driven pipes, plates, and cones, etc. receiving equipment corpora- ground wire is tion has been organized to establish Keep the ground wire protected from run in full compliance with rules for mechanical injury. Use an wireless stations in all parts of the approved protective ground wire, as previously world. August, 1922 Radio Journal r P:.,;, I 1 I Amateur Radio Call List 7th District In the July issue of Radio Journal we published the Amateur Radio Call List for the Sixth District. It proved" to be such a popular and valuable feature that we will continue the list. This issue contains the Government list of Amateurs in the Seventh District who are licensed to send. The Seventh District comprises the States of Oregon, Washington, Idaho, Montana, Wyoming and the Territory of Alaska. St., 7AA H. E. Renfro. 7319 48th Avenue S.. 713Z Ernest O. Robbins, 300 Fir St., Olym- 7DR Howard E. Baker, 153 Harrison Seattle, Wash. pia, Wash. Seattle, Wash. TAB D. F. Craib, 2146 N. 69th St., Seattle, 7CA Edward A. Schaaf, 6302 22d Ave. S., 7DS D. E. Larson, 777 5th St., Astoria, Ore. Wash. Seattle, Wash. 7DT R. P. E. Mortell, 102 W. Mercer St., 7AC Vincent I. Kraft, 6838 19th Ave. N. E., 7C13 Winifred E. Dow, 2329 S. K St., Ta- Wash. coma, Wash. Seattle, Seattle. Wash. 7DU W. G. Ludgate, Jr., 977 Multnomah St., 7AD Francis J. Brott. Walk 1, No. 10, Seat- 7CC F. C. Olney, Front St., Stanwood, Portland, Ore. tle, Wash. Wash. 7DV H. N. Pinkman, 617 28th Ave. N., Seat- 7AE E. H. Forsnan, 2846 W. 73d St., Seattle, 7CD A. F. Liffring, Creston, Mont. tle, Wash. Wash. 7CE H. G. Reichert, 818 N. L St., Tacoma, 7DW L. N. Seger, 5633 S. L St., Tacoma, 7AF F. C. J. Spike, Division St. and Yakima Wash. Wash. Ave., Tacoma, Wash. 5046 S. K St., Ta- N., 7AG H. M. Truesdale, 2770 E. 53d St., Seat- 7CF Roy J. Alexander, 7DX J. G. Upthegrove, 344 E. 41st St. tle, Wash. coma, Wash. Portland, Ore. Benzon, 3637 14th Ave. W.. 7CG C. J. Kennison, 1521 Alturas St., Boise, 7DY J. E. Middleton, 146 N. Normal St., 7AH Clarence Idaho. Burley, Idaho. Seattle, Wash. N., 369 14th St., 7CH John R. Hoover, 1005 Harrison Blvd., 7DZ H. C. McCracken, 460 E. 13th St. 7AI Donald L. Woodward, Portland, Ore. Portland, Ore. Boise, Idaho. St., 7AJ F. B. Mossman, 3015 N. 26th St, Ta- 7CI M. G. Carlton, 1067 E. Burnside St., 7EA N. A. Clodfelter, 1221 Madison coma, Wash, Portland, Ore. Portland, Ore. 3232 13th W., 7EB W. D. Simpson, 1543 Court St., Salem, 7AK J. E. Belling, St. Seattle, 7CJ H. H. Anderson, 1721 35th Ave., Seat- Ore. Wash. tle, Wash. St., 7AL Kenneth A. House, 130 Polk St., Mos- 7EC R. M. Slinington, 1247 Tillamook cow, Idaho. 7CK Joseph Rooney, 214 Olympia Pl., Seat- Portland, Ore. 7AM A. R. Tingstad, 2507 I St., Tacoma, tle, Wash. 7ED W. V. Russ, 831 Michigan St., Port- 7CL Wellington McMillan, 157 Harrison St., land, Ore. Wash. Ave., 7AN Chas. E. Williams, 8326 13th Ave. NW., Seattle, Wash. 7EE R. E. Marshall, 1135/ Albina 7CM John C. Vogler, 122 Belmont Ave. N., Portland, Ore. Seattle, Wash. The Dalles, 7A0 L. G. Haw, 14th St. S. and Bayview, Seattle, Wash. 7EF H. B. Bogue, 907 Clark St., Seattle, Wash. 7CN Wayne K. Harris, 543 N. Broadway, Ore. 7AP T. T. Smith, 1306 E. 75th St., Seattle, Marshfield, Ore. 7EG G. R. Stewart, W. 8th St., Ellensburg, 7C0 Geo. W. Fitzpatrick, 3252 Ferdinand Wash. Wash. Wash. 7AQ P. B. Maginnis, 364 S. 5th St., Marsh- St., Seattle, Wash. 7EH L. W. Cardinal, Du Pont, field, Ore. 7CP E. G. Martin, 2316 N. Broadway, Seat- 7EI A. L. Fisher, Jr., 2443 N. Yakima Ave., 7AR R. Bostwick, Jr., 2906 W. Eaton St., tle, Wash. Tacoma, Wash. Seattle, Wash. 7CQ Robert G. Stone, Post Office Box 616, 7EJ W. E. Gurley, 2332 Monroe St., Cor- 7AS F. Eastman, 1506 28th Ave. W., Seat- Boise, Idaho. vallis, Ore. tle, Wash. 7CR Ralph T. Galyean, 460 Miller Ave., 7EK Leslie Lunan, 806 S. M St., Tacoma, 7AT Earl La Pine, 2301 E. Madison St., Seat- Portland, Ore. Wash. tle, Wash. 7EL G. H. Folsom, 7427 Olympic Court, 7AU J. L. Webster, 2568 12th Ave. W., Seat- Seattle, Wash. tle, Wash. 7EM E. M. Stone, 4215 Aurora Ave., Seat- St., Port- tle, Wash. 7AV L. F. Mahoney, 461 Schuyler 7EN Bernard Altick, 1715 Revenna Blvd., land, Ore. Seattle, Wash. 7AW B. C. Gamer, 3750 N. 30th St., Tacoma, 7E0 H. T. Louis, Dayton, Ore. Wash. 7EP Fred C. Driffeld, Unga Island, Unga, 7AX Bert W. R. Hagen, 101 S. 11th Ave., Alaska. Yakima, Wash. 7EQ J. S. Ramsay, 215 E. 9th St., Ellens- 7AY Jesse F. Ives, 1942 4th Ave. W., Seat- burg, Wash. tle, Wash. Chas. M. Emigh, 2123 3d Ave. W., Seat- 7AZ James A. Solomon, 7200 28th Ave. NW., 7ER 7CS Emil De Neuf, 4411 Juneau St., Seattle, tle, Wash. Seattle, Wash. 1010 N. 11th Ta- Chas. Richard, 3024 S. 9th St., Wash. 7ES Arthur J. Fries, St., 7BA Merle 7CT Henry S. Gagnon, 409 San Rafael St., coma, Wash. Tacoma, Wash. I. N. Robinson, 623 Boyleston Ave. N., Merrit G. Cookingham, 516 N. Cush- Portland, Ore. 7ET 7BB 7CU Clyde Wood, 1801 Railroad Ave., Aber- Seattle, Wash. man Ave., Tacoma, Wash. 211 St., Helena, R. Benoit, 5046 S. L St., Ta- deen, Wash. 7EU Jos. Mazuranich, Joliet 7BC Neville 7CV C. M. Carlquist, 1061 Concord St., Port- Mont. coma, Wash. Lester E. Obrien, 902 S. G St., Tacoma, 7BD Richard R. Atchison, 656 E. 44th St. N., land, Ore. 7EV Portland, Ore. 7CW Olfan De Guire, Silverton, Ore. Wash. 11th St., Ta- 7CX Lloyd A. Peek, 4916 Wallingford Ave., 7EW W. S. Palmer, 6308 S. Yakima Ave., 7BE Harold H. Bitter, 3015 E. Seattle, Wash. Tacoma, Wash. coma, Wash. St., Tacoma, 7EX E. L. Wharton, Glasgow, Mont. 7BF Edward Rebman, 3110 Sunderland St., 7CY Ben Crawford, 323 S. J Seattle, Wash. Wash. 7EY C. N. Ashla, 1650 E. Terrace St., Port- N. 24th St., 7CZ C. E. Fraer, 88 Park Ave., Marshfield, land, Ore. 7BG Karl W. Weingarten, 3219 Ore. 7EZ E. W. Morgan, 530 Tenino Ave., Port- Tacoma, Wash. Ave., Port- land, Ore. 7BH Clive Scott, 345 S. 14th St., Salem, Ore. 7DA G. B. Crieser, 967 Vernon Smith, Tekoa, Washington. land, Ore. 7FA J. C. Forrest, 438 High St., Bellingham, 7BI Lester 7DB Franklin Manning, 917 S. Sheridan Wash. 7BJ George Sturley, 206 E. 17th St., Van- 7FB C. E. Richie, 631 Main St., Klamath couver, Wash. Ave., Tacoma, Wash. Ave. S., 7DC Lawrence Carlson, Billings, Mont. Falls, Ore. 713K Howard F. Mason, 3335 33d 7DD F. H. Crager, Jr., Helena, Mont. 7FC L. S. Young, 1055 Hancock St., Port- Seattle, Wash. 7DE L. A. Quigley, 838 Tibbets St., Port- land, Ore. 7BL A. Dailey, Lake Burien, Wash. land, Ore. 7FD Alvin Moore, 634 E. 65th St., N., Port- 7BM C. W. Ball, Rt. 1, Bellingham, Wash. 7DF Archie L. Bolstad, 1832 4th Ave. W., land, Ore. 7BN Geo. C. Henny, 530 Heights Terrace, Seattle, Wash. 7FE F. T. Richards, 6323 5th Ave. NE., Portland, Ore. 7DG W. H. Campbell, 1209 Franklin St., Seattle, Wash. 7B0 D. X. Lavallee, 4034 38th Ave. S., Seat- Boise, Idaho. 7FF G. B. McCullough, 608 S. 2d St., Ta- tle, Wash. 7DH L. G. Van Slyke, Hyattville, Wyo. coma, Wash. 7BP R. A. Willison, Jr., 765 Melrose Dr., Warm Springs Ave., 7FG Roy Fifield, 278 Baldwin St., Portland, Portland, Ore. IDI R. M. Quarles, Pullman, Boise, Idaho. Ore. 7BQ Hugh E. Allen, 701 State St., 7DJ L. L. Stanley, 320 State St., Helena, 7FH E. W. Collins, 315 Market Ave. W., Wash. Mont. Marshfield, Ore. 7BR E. N. Swan, 1461 Portsmouth Ave., Veen, 816 8th Ave. N., Great 7FI D. W. Campbell, 204 Spaulding St., Portland, Ore. 7DK Harry I. Ave. Falls, Mont. Pullman, Wash. 7BS O. J. Humphrey, Jr., 605 Boylston 7DL Clark Moore, 211 14th Street, Ray- 7FJ L. A. Byerly, 909 Bryce St., Portland, N., Seattle, Wash. Ore. 4028 E. K St., Ta- mond, Wash. 7BT George A. Nelson, 7DM F. F. Gibbs, 512 E: 4th St., Hood 7FK T. A. Wetzel, 904 Vancouver St., Port- coma, Wash. River, Ore. land, Ore. 7BU Morris Hoag, Sheridan, Wyo. 7DN Roy Smith, 443 7th St., Raymond, 7FL F. F. Gray, 1208 2d St., Butte, Mont. 7BV C. F. Kennedy, Kelso, Wash. Wash. 7FM J. E. McBride, Cor. Bella and 25th St., .7BW Carl A. Hoffman, 618 Sunset Ave., 7D0 Rudolph Miklave, Blk. Diamond, Wash. Boise, Idaho. Seattle, Wash. 500 12th St., Port- 7FN Roy M. McMillan, 3727 Pacific Ave., Miller Ave., 7DP Geo. W. Cameron, 7BX Floyd F. Taylor, 227 N. land, Ore. , Tacoma, Wash. Burley, Idaho. Donald Gidley, 771 4th St., Marshfield, 7F0 Lloyd Wallgren, 2124 Westmore Ave., 7BY Wilfred K. Bert, 1924 9th Ave. W., 7DQ Everett, Wash. Seattle, Wash. Ore. Page 142 Radio Journal ' --3--_ August, 1922 7F1' J. D. Shaver, 939 The Alameda, l'ort- land, Ore. 7IC Albert Onsum, 806 i;. :5th St., Seattle, 7KK L. 7FQ L. R. Goddard, 527 Water Wash. P. Crowson, 896 Boulevard, Ash- Wash. St., Tekoa, 7ID Benedict land, Ore. Barr, Mour\t Angel, Benedict, 7KL 7FR H. L. Jones, 1208 Ore. G. C. Stocking, 4131, Beattie St., Hel- W. 70th St., Seattle, 7IE ena,. Mont. Wash. C. J. W. Tibbetts, 1813, Broadwa y. 7KM W. O. 7FS A. A. Webster, 7 S. Helena, Mont. Nicholson, 3115 S. 8th St., Ta- Naches Ave., Ya- 7IF coma, Wash. kima, Wash. R. M. Darsfield, 662 Charnelton ?FT Currie N. Teed, Kuna, Idaho. Eugene, Ore. S t., 7KN Wm. Haferkorn, Clinton, Wash. 7FU Willis Oldfield, 1221 Colby Ave., Ever- 71G P. B. Jackson, 434 Broadway, 7KO Paul E. Lung, 936 S. Grant St., Ta- ett, Wash. Ore. Seaside, coma, Wash. 7FV Winston Countryman, 2022 Oakes Ave., 7IH G. ' 7K13 James Ever(-tt, Wash. W. Selvidge, 4321 9th Ave. NE., Holcombe, 137 N. 79th St., Seat- 7FW H. Tenny, Seattle, Wash. tle, Wash. 418 Union St., Seattle, Wash. 7KQ C. L. 7FX Theo. 11cKeon, 2920 Itucker 7II A. B. Rotering, Box Stephens, 1166 Alder St., Eugene, ett, Wash. St., Ever- 7IJ Everett 43, Glasgow; Mont. Ore. Dunnette, 892 S. 12th St., 7KR T. E. Olson, 7FY C. A. Harrington, 104 N. 6th Salem, Ore. 528 Market St., Portland, Idaho. St., Boise, 71K Harry Ore. H. Olson, 310 4th Ave Seaside, 7KS A. H. Whittle, 7FZ C. M. Yadon, 1611 Johnson Ave., Ore. 7 Grand Ave., Astoria, math Kla- 7IL Ore. Falls, Ore. T. C. Hall, 1126 Taylor St., Eugene, 7KT R. A. Denham, 7GA C. ]t. Heartier, 343 E. 35th St., Portland, 7IM L. J. Simms, Ore. Prairie City, Ore. Ore. 311 N. 27th St., Billings, 7KU W. K. McIntosh, 1395 Rodney Ave.,. 7GB Mont. Portland, Ore. C. I3. Hurley, Jr., 808 N. Yakima Ave., 71N A. L. Adams, Tacoma, Wash. 321 W. Main St., Silver - 7KV M. W. Edwards, Camp Lewis, Wash. 7GC ton, Ore. 7KW G. Victor Aldrich, 337 N. 4th St., Corvallis, 710 H. Metcalf, 1443 W. 53d St., Seattle, Ore. H. E. Welch, Rt. 8, Salem, Ore. Wash. 7IF A. A. McCue, 7GD J. M. Pearson, 740 Schuyler St., Port- Klawock, Alaska. 7KX Errol Hurtt, 250 N. Miller St., Burley., land, Ore. 7IQ Donald C. Gannon, Central Ave., Kent, Idaho. 7GE L. C. Maybee, 828 Wash. 7KY E. Bridge St., Pesco, 7IR J. R. Harris, Cohagen, C. Anderson, 317 6th St., Marsh- Wash. 7IS F. W. Mont. field, Ore. 7GF L. S. Dyer, 761 Lawrence, 406 S. Crosby 75th St. N., Seattle, Tekoa, St., 7KZ F. G. Ashall, 536 N. Warren St., Wash. Wash. Mont. Helena, 7GG G. D. Crockett, 71T Roy erson, a Alaska. 1420 Hawthorne Ave., 7W GeorgendMeacham, 7LA David Phillips, 6601 Union Ave., Ta- Portland, Ore. 915 30th Ave. S., coma, Wash. 7GH Gale Mix, Moscow, Idaho. Seattle, Wash. 7LB 7GI E. 7IV Arthur Fletcher, Woodbine Alvin Stenso, 1922 S. J St., Tacoma,. F. Barber, St. John, Wash. Idaho. St., Boise, Wash. 7GJ Paul V. Noorlin, 45 69th St., NE., 7LC Eugene land, Ore. Port- 71W P. R. Hoppe, 1633 Williamette Zaluskey, 8257 Stroud Ave., gene, Ore. St., Eu- Seattle, Wash. 7GK C. H. Linsley, 1249 Center St., 7LD O. Evans- 71X T. L. Estes, 318 Ave. F. Torges n, 7044 17th Ave. NW., ton, Wyo. E, Snohomish, Seattle,Wa' h. 7GL C. E. Jean, 1103 Wash. E. 64th St., Tacoma, 711. Danzil 7LE Harry E. Redeker, 1213 17th Wash. Cutler, Vashon, Wash. Boise, St. N., 7GM J. B. Hendry, 7IZ Charles Burson, 716 42d Ave. Idaho 720 S. Grant Ave., Ta- tle, Wash. E., Seat- 7LF E. A. Kraft, 5042 11th Ave. NE., coma, \\'ash. tle, Wash. Seat- 7GN C. A. Necton, 7JA E. L. Crawford, 1340 Court St., 3920 N. 26th St., Ta- Ore. Salem, 7LG J. C. Burke, 1186 E. Lincoln St., Port- coma, Wash. land, Ore. 7GO C. R. Goodwin, 7JB F. H. Stephens, 63 68th St., 445 N. Commercial St., Ore. Portland, 7LH C. P. Cowper, 1419 Boulder Ave., Salem, Ore. ena, Mont. Hel- 7GI' Allen Gunston, 7JC Keith Frazier, 829 3d Ave. S., 903 6th St., Olympia, Mont^'- Glasgow, 71.1 C. D. Brumbaugh, 354 Central Wash. Marshfield, Ave., 70Q M. D. Koupal, 7JD Francis McKee, Cor. E. 11th Ore. 610 W. 5th St., Eugene, Court, Weiser, and E. 7LJ W. M. Bonar, Plainview, Ore. Ore. 7JE Idaho 7LK J. R. Mendenhall, 7G1t. C. R. Schrotke; Bothell, Wash. H. C. Boardman, 112 W. 5th St., Port 1007 6th St., Boise, 7GS Lyle Evenson, Angeles, Wash. Idaho. 518 N. 79th St., Seattle, 7LL 'Wm. Carlton, 4302 Nevada Ave., Wash. tle, Seat- 7GT C. R. Offield, Wash. 8415 Dayton St., Seattle, 7LM D. E. Oberg, 617 S. 5th Wash. Wash. St., Yakima,, 7GU Jos. M. Deady, 150 27th Ave., 7LN L. Wash. Seattle, L. Martin, Nampa, Idaho. 7LO W. C. Burkhart, 261 Warm Springs. 7GV E. D. I'ollock, 2707 10th Ave. N., Seat- Ave., Boise, Idaho. tle, Wash. 7LP J. D. Killgreen, 7GW M. E. McCullogh, Milwaukie, Ore. 814 S. 15th St., Ta- 7LQ K. C. Preuitt, 803 8th Ave. NW., coma, Wash. ena, Mont. Hel- 7GX Fred L. Patterson, 7LR 865 Williams Ave., Royal Howard, 425 Ellsworth SL, Al- Portland, Ore. bany, Ore. 7GY E. O. Selby, 1401 N. 20th St., Boise, 7LS Hunter Anstine, Ferndale, Idaho. 7LT D. Wash. 7GZ 7,1 b' Clyde Anderson, H. Vollmer, 1205 Worden Ave., Kla- Leo C. Clark, 1509 24th Ave., Seattle, 5095 Washington St., math Falls, Ore.' Wash. Moscow, Idaho 7LU F. N. 7HA 7JG H. R. Drinker, 497 Mitchell, Greybull, Wyo. H. B. Churchill, . 705 Belmont St., E. 16th St. N., Port- 7LV H. E. Rankin; Salem. Ore. land, Ore. 7LW Northbend, Ore. 7HB 7JH J. D. Hertz, Vancouver, Ray T. White,.51 E. 24th St., N., fort-. G. M. Smith, Eatonville, Wash. 7JI Albert Wash. land, Ore. 7HC Gifford Emery, 611 Malden Ave., McGuflin, 346 1st Ave. N., Glas- 7LX Arthur tle, Wash. Seat- gow, Mont. Lindsley, R. F. D. No. 3, Ore- gon City, ' 7HD A. A. 7JJ Gough Dix, Box 151, Gresham. Ore. Thibodo, Seaside,' Ore. 7JK Ore. 7LY H. E. Cutting, 420 W. 7HE D. W. Coffey, Kalarna, Wash. Frank 1'. Bloss, 792 E. 34th St., Port- man, Hoch St., Boze- 711F H. M. land, Ore. Mont. Skipworth, 1151 Charnelton St., 7JL 7LZ R. T. Thelberg, 4230 Eugene, Ore. Waverly Miller, 1704 E. 14th Ave., Spo- Seattle, Brooklyn Ave., 7HG H. C. Williams, kane, Wash. Wash. 402 E. Jefferson St., 7JM O. 7MA E. V. Olson, 223 W. 29th Boise, Idaho. R. Anderson, 1114 E.' Market St., kane, Wash. Ave., Spo- 7H1 -I W. S. Tucker, 2832 N. Broadway, Portland, Ore. 7MB H. F. tle, Wash. Seat- 7JN Roy Rice, Wapinitia, Ore. Osterburg, 621 S. Jackson St.,. 7.10 Marvin Butte, Mönt. 7HI W. B. Robinson, 1113 E. I Larsen, 2024 Spofford St., Spo- 7MC Wash. St., Auburn, kane, Wash. M. V. Moller, Myrtle Point, Ore. 7JP P. W. Dann, 7MD C. F. Osterman, 1140 Court St., 7HJ Fred Brown, Rt. 5, care Mrs. R. P. Box 974, Astoria, Ore. Ore. Salem, May, Boise, 7.10 R. A. Gould, Basin, Wyo. Idaho. C. 7ME C. V. Finch, 201 S. 6th 7HK E. R. Heifort, 3716 Colbq 7JR L. Pitcher, 723 E. 5th St., Moscow, St., Bozeman,. ett, Wash. Ave., Ever- Idaho. Mont. 7JS L. 7MF Arthur Smith, 261 Jefferson 7HL M. D. Richardson, 500 N. Williarnette C. Tate, 807 6th St., Anacortes, gene, St., Eu- St., St. Wash. .Ore. Helens, Ore. 7JT O. S. 7MG A. L. Sams. 468 Heiman 7HM Merwin Elton, 611 5th Ave. N., Van Olinda, Vashon, Wash. Ore. St., Ashland,. Falls, Great 7.IU J. M. Morris, 650 12th Ave. Mont. E., Eugene, 7MH E. J. Gordon, 320 7HN Delmer Jeans, 1090 Ore. Summit Ave. N.,. W. 7th St., Eu- 7JV H. M. Moon, Seattle, Wash. gene, Ore. R. F. D. No. 2, Meridian, Lyndon, 7HO Carroll Freeland, White Swan, Idaho. 7MJ Jack Stranger, Wash. 7HP Thos. Wash. 7JW J. D. Tait, 851 E. 26th St., 5 E. 3d Ave., Spo- E. Widrig, 1132 8th Ave. W., land, S., Port- kane, Wash. Seattle, Wash. Ore. 7MK H. J. Jilg, 7HQ T. J. Bldner, 7JX A. E. Wilkinson, 1919 2d St., Baker, Jr., 2727 32d Ave., S., Seat- 2024 6th Ave., Seattle, 7JY Bruce Duncan, Ore. tle, Wash. Wash. 923 31st St., N., Billings, 7ML D. D. Smith. Collister 7HR A. D. Cole, 430 15th Ave. Mont. 7MM Frank St., Bore, Idaho. E., Eugene, 7JZ R. B. Curnutt, 703 Pugh, Philomath, Ore. Ore. 9th Ave., S., Great 7MN R. V. Bishop, 2124 7HS O. C. Kent. Glasgow, Mont. Falls, Mont. kane, W. York St., Spo- 7HT E. H. Weimer, 7KA H. J. Kirk, 658 Gllsan St., Portland, Wash. Cohagen, Mont. Ore. 7MO Felix Thompson, lst'St., Douglas, 7HU Sol Hasbrouck, 224 E. Idaho St., Boise, 7MP Ralph Lindah!, Wyo. Idaho. 7KB E. M. Sheets, Oak Grove, Ore. Bozeman, Mont. 7KC R. R. Zylstra, 7MQ L. L. Long, Cornelius, Ore. 7HV James Ray, 1831 24th Ave., Seattle, Lynden, Wash. 7MR Carl Soderlund, Wash. 7KD Herbert Wurst, Apt. 8, Jensen Apart- 116 13th St., Van- ments, Glasgow, couver, Wash. 7HW V. K. Roberts, Apartment 62, Monti- Mont. 7MS R. H. cello, Helena, 7KE L. L. Baker, Myrtle Point, Ore. Hughes, 1758 Main St., Hills- Mont. 7KF T. D. boro, Ore. 7HX P. A. Schumacher, Box 116, Ferguson, 1258 Chemekita St., 7MT P. Wash. St. John, Salem, Ore. H. Euler, 1819 Commercial St., As- 7KG S. A. toria, Oro. 7HY W. -T. Vale, 111 Pine Wicks, 712 W. Meeker St., Kent, 7MU Falls, St., Klamath Wash. P. F. Peyton, 1060 S. Commercial St., Ore. 7KH L. E. Sbatto, Salem, Ore. 7HZ P. L. Schreiber, Cohagen, Mont. 426 15th St,, Astoria, 7MV F. L. Edwards, 7IA J. E. Jenkins, Ore. Rt. 8, Box 39, Yakima, Rural Rt. 2, Olympia, 7KI V. W. Bidlinghafer, Wash. Wash. Shannon Hotel, 7MW H. W. Edmondson, 7IB J. G. Nordahl, 809 24th Glasgow, Mont. 637 N. 14th St., Ave. N., Seat- 7KJ W. McGoffln, 450 Corvallis, Ore. tle, Wash. Chinaalt St., Ho- 7MX Raymond E. quiam, Wash. Stien, 339 Jefferson . Eugene, Ore. St., Page 143 August, :1922 Radio Journal

B. C. Hendricks. Cornelius, Ore. 7111' E. R. Sinm"ni, 111114 Leonard St., Port- 7MY J. R. Hill, 703 9th Ave. E., Eugene, Ore. 7PD land, Ore.. Asa Phillips, Tenino, Wash. 7PE L. C. Grove, Kenai, Alaska. 7MZ 7PF Glen Gourtle, 2818 Victor Pl., Everett, 7RQ D. E. Replogle, cashmere, Wash. 7NA E. E. Ames, 349 N. 32d St., Portland, Ki Ich li, 319 N . 33d St., Billings, Ore. Wash. 711ít ,IeIY'ery 7PG K. H. Ellerbeck, 2019 Nob Hill, Seattle, Mont. 7NB H. O. McCoy, 4328 Park Ave., Tacoma, L. E. Scriven I1,5 I.Idherwood St., Spo- Wash. Wash. 71(5 7PH R. M. Gardner, R. A., Box 292, Eugene, kane, V\':,=h 7NC R. W. Morse, 955 13th Ave. W., Seat- 71-c1` E. S. Collies, 2.515 Pacific. Ave., 1-10- tle, Wash. Ore. 7PI R. J. Moore, 115 1st St., Wolf l'oint, \\'ash. 7ND Roland Sudman, 115 W. 20th St., Olym- 711 t1 N. J. Brock, 711 iCearuey St., L'ort- pia, Wash. Mont. D. P. Scaife, 288 8th St., Marshfield, land, ,,r,. 7NE C. J. McClure,. Leavenworth, Wash. 7PJ 711V \Vìllian, Mort on, ,t:,23 I:,Ih Ave., Part - F. F. Henriot, Winlock, Wash. Ore. 7NF D. K. Boyd, 2d Ave., Glasgow, Mont. 7NG W. D. Cheney, .1321 E. 31st St., S., 7PK 71:\V I). E. Schutt z, 2123 Birch St., ANtorin, Ore. 7PL C. H. Ackerman, 305 5th St. S., Glas- Portland, gow, Mont. Ore. 7NH J. C. Wilson, 295 N. 24th St., Portland, 1, 7PM H. C. Manning, 4324 8th Ave. NE., 7I:X I.. S. Shields, Box 21, R. F. D. Salen,. Ore. Seattle, Wash. Ore. 7NI F. S. Flesher,, 387¢ Burnside St., Port- Ave. NW., Seat- 711V I.. V. ''/,inun,'rn1JU,, OWYhee St., On-, land, Ore. 7PN B. L. Davis, 8523 12th tarin, ore. 7NJ G. A. Hunter. 518 Willow St., Port tle, Wash. N. Conant Ave., 7P0 G. E. Kinsey, 907 W. 58th St., Seattle, 7RZ V. B. .Il,(',illuch, 223 Townsend, Wash. Wash. It,n l,y. Idaho. 7PP Stadium High School, 1st and E Sts., 7SA B. C. t:, rocs, 336 E. :Ith SI., Eugene, Tacoma, Wash. l trc. 7Sí3 1.. E. Itr:,cht, 1804 Batchelor SI., Miles' 7PQ Arthur Harding, 1120 N. 97th St., Seat- l'il}, Mont. tle, Wash. 7SC W. :\. C. IIcairich, 5113 Melrose Ave., 7PR Leland Harris, 3232 38th Ave. SW., Se:, t) I,. \\':, ah. Seattle, Wash. 7SI:) LL L. Fri z, 7117 N. 65th St., Seattle, 7PS Arthur Randall, 2802 22d Ave., Seat- Wash. tle, Wash. 7SE T. L. Richardson, l'. S. I'. 1l. S. Hos- 7T'T E. P. Coulter, 529 3d St., Helena, Mont. pital No. 59, 'l'aco,n:,, Wash. ' 71't' E. L. Hansen, R. F. D. 2, Powell, Wyo. 7SF E. E. Griggs, 1518 1st St., Aberdeen, 71'V J. M. Dickenson, 434 17th St., Corvallis, Wash. 7NK H. R. Hildreth, 2064 23d St. N., Seat- Ore. 7SG Don Harris,' 1711 Simpson St., Aber- tle, Wash. 7PW C. W. Gabrielson, Puyallup, Wash. deen, Wash. 7NL G. E. Langford, 2927 Ash St., Spokane, 7PX L. A. Kobe, Powell, Wyo. 7SH A. J. Homehick, 904 1st St., Aberdeen, Wash. 7PY Hans Waale, Nampa, Idaho. Wash. 7NM K. C. Evening School, 290 Grand Ave. 7PZ Walter Bone, Carneyville, Wyo. 7SI Hal Garrott, 4320 Meridian Ave., Seat- N., Portland, Ore. 7QA H. M. Hassell, 120 E. 60th St., Seattle, tle, Wash. 7NN D. E. McGee, 616 5th St., Hoquiam, Wash. 7SJ R. P. Heatlle, 324 1' St., Aberdeen, Wash. 7QB Kenneth Field, 306 E. Olive St., Seat- Wash. C. C. 218 E. 63d St. l'orl- 7N0 E. K. Carriere, 337 Morris St., Port- tle, Wash. 7SK Howard, N land Ore. 7QC J. F. Bunting, 1907 1st Ave. W., Seat- land, Ore. Wash. tle. Wash. 7SI. D. C. McManemy, 1309 Hood St., Aber- 7NP B. J. Glein, Gig Harbor, 7QD D. H. Bunch, 1015 Spur St., Aberdeen, deen, Wash. 7NQ F. L. Canty, Eatonville, Wash. Wash. 7SM C. T. Hanes, 906 19th Ave. N., Seattle, 7NR H. V. Koontz, Buffalo, Wyo. 7QE W. H. Motz, 4608 J St., Tacoma, Wasa. Wash. 7NS F. H. Alverdes, 142 E. 47th St., Port- 7QF S. W. Ostrom, 4840 84th St. SE., Port- 7SN R. G. Wascher, 760 12th Ave., Seaside, land, Ore. land, Ore. Ore. 7NT. Cecil Hughes, 601 7th Ave. S., Glas- 7QG G. R. Salisbury, 1951 3d Ave. W., Seat- 7S0 W. L. Duncan, 142 11th St., Corvallis, gow, Mont. tle, Wash. Ore. 7NU E. J. Moe, 1209 S. Ivanhoe St., Port- 7QH H. M. Reynolds, 3817 Densmore Ave.. 7SP M. W. Rice, 497 E. 28th St., Portland, land, Ore. Seattle, Wash. Ore. 1315 Sandy Blvd., Port- 7SQ R. F. Pars!ow, 522 S. Main St., Rose- 7' NV G. C. Henry, 1214 1st Ave. S., Great 7QI J. D. Keating, land, Ore. burg, Ore. Falls, Mont. 579 Orel 7NW E. L. Clark, 2301 Cherry St., Hoquiam, 7Q.T Frederich Lindstrom, Powell, Wyo. 7SR R. S. Bean, E. 9th St., Eugene, Wash. 7QK R. R. Patrick, Eatonville, Wash. 7SS L. Iy. Seger, 5633 S. L St., Tacoma, 7NX C. V. Henkle, John Day, Ore. 7QL Alva Flippin, Rainier, Ore. Wash. 7QM R. E. Welch, 1005 N. Normandie St., 7ST M. C. Knight, 3645 35th St. W., Seat- 7NY J. R. Watson, Rt. 2, Forest Grove, Ore. tle, 7NZ J. J. Wilson, 34 E. 62d St., Portland, Spokane, Wash. Wash. Ore. 7QN A. Z. Lillian, 620 21st Ave. N., Seattle, 7SU J. A. Kindle, 230 Sam St., Monroe, 7OA William Thurber, 300 N St., Hoquiam, Wash. Wash. Wash. 7QO J. C. Mitchell, Mutual Life Building, 7SV D. H. Harvie, 705 Montgomery St., Al- 70B Arthur Hagerman, Y. M. C. A., Baker, Seattle, Wash. bany, Ore. 7QP Howard Liebe, 204 N. 22d St., Portland, 7SW C. M. Landaker, R, R. 4, Box 17a, Ore. Salem, Ore. 70C H. H. Clark, 386 E. 11th St:, Portland, Ore. 7QQ Chris Engleman, Jr.. 321 W. 32d St., 7SX C. L. Hyer, 815 Thurston St., Albany, Ore. Ore. 70D M. B. McBride, Jr., 1031 N. 23d Ave., Vancouver, Wash. 7QR C. V. Annin, Myrtle Point, Ore. 7SY G. M. de Broekert, 345 Mill St., Eu- Seattle, Wash.' gene. Ore. 70E H. S. Pyle, 810 Warren Ave., Bremer- 7QS E. W. Henry, 5505 36th Ave. SE., Port- ton, Wash. land, Ore. 7SZ F. M. Curtin, 530 Thomas St., Hillyard, C. Johnson, 1014 Glass Ave., Spo- 7QT Clarence Hurd, 1514 Williamette St., Wash. 7ÓF V. Eugene, Ore. 7TA R. K. Leonard, 421 N. Belmont St.. kane, Wash. Wash. E. A. Elge, 418 N. Brenton St., Helena, 7QU F. R. Cartan, 1461 Monroe St., Cor- Seattle, 70G vallis, Ore. 7TB V. R. Kern, 1509 W. Main St., Cottagc Mont. Grove, Ore. 70H G. S. Feikert, 402 N. 17th St., Corvallis, 7QV John Munzenrieder, 515 First St., Hel- Ore. ena, Mont. 4OI P. M. Smith, R. F. D. 3, Powell, Wyo. 7QW Jay Isham, 820 Dalton Ave. W., Spo- 70J L. U. Bennett, Port Townsend, Wash. kane, Wash. 70K Frederick Koelsch, 103 Jefferson St., 7QX F. A. Koehler, 314 S. 12th St., Corval- Base, Idaho. lis, Ore. 70L Roy Smith, 202 1st St. S., Burley, Idaho. 7QY Victor Chambers, Tenth St., Cottage 70M Harold Woodyard, Sunnyside, Wash. Grove, Ore. 70N Sheldon Hagen, 807 24th Ave., Seattle, 7QZ D. W. Cathcart, 1505 E. 66th St., Port- Wash. land, Ore. 700 G. 0. Leonard, 1827 4th Ave. W., Seat- 7RA M. A. Hauge, 5635 11th Ave. NE., Seat- tle, Wash. tle, Wash. 7OP H. E. Williamson, 316 Union St., Seat- 7RB R. G. Farrah, 700 E. 26th St., . Van- Wash. couver, Wash. tle, Barton Stemmler, Spruce St., Myrtle 7TC G. C. Perry, 3712 Woodlawn Ave., Seat- 70Q R. E. Peratovich, Bay View, Alaska. 7RC tle, Wash. 70R A. H. Lillibridge, 506 E. A St., Moscow, Point, Ore. 7RD Charles Parmelee, Sunnyside, Wash. 7TD G. M. Leasia, 1116 Heron St., ' Aber- Idaho. deen, Wash. 7RE . N. H. Foster, N. Water St., Ellens- 70S C. F. Burdick, Casper, Wyo. 7TE G. C. Henny, Bay Ocean, Ore. 7OT B. B. Bliss, Jr., 417 Bannock St., Boise, burg, Wash. Idaho. 7RF H. E. Nelson, Centralia, Wash. 7TF J. K. Trescott, 504 N. 31st St., Billings, 7RG E. J. Hoff, 927 Irving St., Astoria, Ore. Mont. 70U W. K. Stockdale, Prosser, Wash. 7TG M. E. Tait,.394 Portland, F. J. Campbell, 2d St. N., Forest Grove, 7RH P. E. Nolte, Camp Lewis, Wash. Guild St., Ore. 70V John Soderstrom, 823 Thorton St., 7TH A. W. Emigh, 335 Grove St., Walla Ore. 7RI Walla, Wash. Edwin Eby, 782 Front St., Salem, Ore. Aberdeen, Wash. 70W G. 0. Campbell, 2443 5th- Ave. W., 7TI H. T. Hayden, Jr., Monroe and Cos- 70X W. A. Hazelwood, Myrtle Point, Ore. 7RJ grove Sts., Port Townsend, Wash. J. R. Truman, 848 Ocean Drive, Ban- Seattle, Wash. 70Y 7RK H. L. Haven, 1123 Burwell St., Bremer- 7TJ C. A. Lockwood, 2117 S. 12th St., Salem, don, Ore. Ore. 70Z Garrett Lewis, 767 Hawthorne Ave., ton, Wash. 7RL G. W. Garman, 1366 31st Ave. S., Seat- 7TK R. W. Mudgett, Powell, Wyo. Portland, Ore. 7TL H. J. E. Young, 1163 E. 17th St. N., H. W. Randall, 1212 Star Route St., tle, Wash. 7PA 7RM H. A. Burgess, 9260 California Ave., ' Portland, Ore. Pullman, Wash. Seattle, Wash. 7TM A. H. Peterson, 2304 N. 39th St., Seat- 7PB R. T. Jones, 116 Edison St., Portland, tle, Wash. Ore. 7RN Kenneth Paton, Cashmere, Wash. R. G. Heitkemper, 439 E. 10th St. N., 7TN J. B. Darragh, Jr., 2560 Fifth Ave. W.. 7PC Herbert Chase, 2010 Water St., Olym- 7110 Seattle; Wash. pia, Wash. Portland, Ore., Page 144 Radio Journal August, 1922

The Armstrong Patent Decision This resumé of the recent Armstrong Patent Decision to our readers. will prove of interest With countless thousands experimenting in claims are bound to result Radio conflicting and with absolute sincerity on the part of those cerned. Such cases must be con- patiently worked out with justice to, all. IT is entirely in keeping with the There he made observations which led in evidence history of radio that one of the him to DeForest's experimental suspect that the radio f re - note books, most important inventions in the quency oscillations showing entries made un- development might be carried der date of June of radiotelepho ny over into the 21, 1912, where there should plate circuit with some is the observation of have resulted from the ex- improvements in a beat or high periments the detecting action frequency note with a straight and researches of an am a- of the audion. He audion teur. Edwin H. Armstrong tuned the plate hook-up. The note shows this to have was but circuit to radio frequency by inserting a boy of school age when he begs n been transient and incapable of repro- in the plate circuit such inductance duction, experimenting with radio. He c on- and capacity and he recognized that it was tinued as to make it responsive not the true heterodyne his experiments after enters ng to the radio frequency effect. This Columbia College, and waves. Then was due to the gas action in the tube, became partic u- he found not only that the larly interested in the radio fre- an effect which has always been ob- fundamen tal quency waves could be carried action of the audion. His research over served by users of the straight audion es into the plate circuit, but that they resulted in the famous "feed-back c ir- hook-up. could be there amplified by the energy cuit," which makes the amplificati on derived "On February 20, 1915, DeForest from the local battery in the published in of incoming radio waves possib le. plate circuit the "Electrical World" Without this without change of fre- an article in which he made invention neither lo ng quency or wave form claims distance radiotelephonic and that they with respect to his early work on the communic a- could be fed into the grid circuit tion nor broadcasting would be po oscillating audion and referred to two s- where they increased the potential such sible. variations experiments, the first of which on the grid and the opera - he said occurred Failing to obtain the support of h is tion continuously in the latter part of family in making repeated itself, pro- 1910 or 1911, and the second an application for a ducing the feed-back on patent on this device, Armstrong regeneration August 26, 1912. In these there is no ma de which increased normally the . a diagram of it and had sensi - mention of the feed-back circuit of it witness ed tiveness of the device and the loud- before a notary. It was this doc the Van Etten August 6 entry, which u- ness of the receiving signals. It was it ment that caused the United Stat es is now claimed represents his first in this way that he thought out his real Circuit Court of Appeals to upho Id discovery of a controllable oscil- invention which has been a great ad- the decision handed down a year ag lating audion. These and other cir- o vance in the wireless art. cumstances by Federal Judge Julius Mayer in th seem to us inconsistent legal e "But it is sought to defeat the with the idea contest between the young i that DeForest had any n- patentee by the claim ventor and Dr. Lee de Forest and th of prior date real knowledge of or understood the deForest Radio Telephone e of invention by DeForest and some Van Etten accidental circuit arrange- and Tel e- patents graph Company, in which in the prior art are also sub - ment of August 6, 1912. Nowhere in Armstron g mitted as defenses. was adjudged the inventor of the notes which are in evidence is any th e "The testimony of DeForest reference device. The really interesting part o has made to the terms which f been offered in evidence by which it would ordinarily be the decision is here given : used if such a dis- is attempted to show that he had covery "The patent con - were made and understood. in suit was granted fo ceived the invention in 1912 and 1913, The terms `feedback' a wireless receiving or `regeneration,' system on Octo and that he is, in point of fact, the `input circuit' or `output circuit' ber 6, 1914, and on an application or `re - file d prior inventor. The appellant offered amplification,' are not found in the October 29, 1913. There are twelv e notes. claims in suit. All are held to be in fringed by the decree below. The in vention relates to improvements in th e V arrangements and connections of th e electrical apparatus and receiving sta tion of a wireless system and par ticularly a system in which the so called audion is used as the Hertzia n wave detector, the object being to amplify the effect of the receive d waves upon the current in the tele phone or receiving circuit, to increas e the loudness and definition of th e sounds in the telephone or other re ceiver, whereby more reliable corn munication may be established or a greater distance of the transmission becomes possible. H ll lilililiiluji- "The patentee, while a student of Columbia University, living in Yon- kers, was an amateur wireless oper- ator and had a station at his home. THE ARMSTRONG "FEED-BACK" CIRCUIT Page 145 August, 1922 Radio Journal t- r and sent music "We do not agree with the claim of proficiency in the operation of radio tady, N. V., conversed is for a equipment. to the Rock Ridge, California, radio the appellant that the patent Atlantic-Pa- is for an instrumentality. receiving station of the principle. It The musical It should be construed to cover the cificdRadio Supplies Co. slightly in intensity, the apparatus which are de- . A new radio record was announced program varied uses of mag- scribed and claimed. -As the testi- when it was reported that for four due to interference of the great mony of the expert called by the ap- hours a powerful sending station of netic terrain in the vicinity of Colo- pellee indicates, the appellant's use in- the General Electric Co. at Schenec- rado Springs. fringes all of the claims of the patent in suit relied on. "We think this excellent contribu- MARVELOUS N E W INVENTION AMPLIFIES RADIO FIFTY tion to the wireless art should be ac- MILLION TIMES-ALSO ENABLES AMATEURS TO HAVE corded the full scope which the court WITHOUT AERIALS We think RECEIVING SETS below gave it in the decree. ROOF the decree is not too broad, but prop- ON THE erly describes what the inventor con- ceived and for which protection must be accorded him. Decree affirmed."

MARCONI LECTURES BY RADIO The wide world knows that Signor Marconi recently arrived in New York on his yacht Elettra, a floating radio laboratory, in which, among other things, he is striving to find a means of eliminating the atmospheric nui- sance-static. Shortly after his ar- rival he broadcasted an address from WGY, the radio broadcasting station of the General Electric Company at Schenectady, N. Y., last evening at eight o'clock, eastern standard time. * * * A unique experiment was recently tried over the radio by the Fitzgerald Music Company from KYJ, Hambur- ger's broadcasting station, Los An- geles, when Olga Steeb played three numbers: "Rigandon," by McDowell, "Caprice," by Paganinni-Liszt, afid "Etude in D Flat," by Liszt, followed Photo Copyright by Ewing Galloway, N. Y. by the same selections by the Ampico as recorded by the pianist. me to eliminate two tubes * This new super -generative circuit enables * H. from the circuit." are to was invented by Major Edwin Government radio beacons in a demonstra- Receiving sets without outside lighthouse service Armstrong and used be installed by the tion the other evening before a meet- aerials have been possible for some at Los Angeles harbor, at Boston, En- time, but they have been too expen- on the ing of the Institute of Radio Nantucket, Cape Charles, This new am- sive for the general run of amateurs. entrance of gineers in New York. Columbia river, at the an ordinary receiv- With the super -regenerative circuit in- Delaware bay and plifier will amplify Puget sound, ing set fifty million times, and, its side sets can be manufactured at the Blunt's reef. the fact same price as those requiring cumber- of con- great power is explained by The stations are the product made to do the some outdoor aerials. the part of the one vacuum tube is siderable effort on done by three-but we practical result of this cir- department to make the work formerly "Another commerce will let Major Armstrong, in his own cuit," says Major Armstrong, "will be seas that surround the country safe. words, explain it in detail : the ability to detect wave -lengths un- end powerful radio stations To that super - der 200 meters with ordinary receiv- been designed to work in con- "A short way to describe the have one vacuum ing sets. In the past short wave- nection with the lighthouse itself, thus generative circuit is that tube is made to do the work formerly lengths were undistinguishable for removing coast wireless from the con- the it under done by three. It has been known for small receiving sets. Now that trol of the navy and placing meters is available of the lighthouse some time that the limit of amplifica- range under 200 the jurisdiction the negative for the broadcasting stations, the cost service. tion is reached when * * * charge in the tube approaches the of operating will be greatly lessened. ap- positive. In experimenting I found "To illustrate the difference between The Canadian government has the inspector in that it *was possible to increase the the receiving set equipped with pointed its first radio and the or- an investigation into negative charge temporarily for about super -regenerative circuit Ontario to make have found that a signal sending stations against one 20,000th of a second, far above dinary set, I all amateur the average which can just be heard at the most which there are complaints from time the positive, and still keep for re- down. It is the possibility of increase critical zero point can be heard all to time, and also issue licenses super -regen- and examine candi- which permits the enormous amplifica- over the room with the ceiving stations and erative circuit." dates for government's certificate of tion which I have demonstrated, Page 146 Radio Journal 1-7 August, 1922

\`1 ;iii///// I ///. ys;

Every invention of universal com lect merciai of a Canuck from the Times sta- Washington, value undergoes continuous tion. Its successful D. C., where they are improvement rendition suggests being installed in the McKim until perfection is the desirability of more entertainment memo- reached, and radio apparatus rial tower of the Church of the will be of this nature. The tricks of the elo- no exception to the rule. It is re- cutionist Epiphany. do not "get across very well * * ported that the General Electric Com- in broadcasting, * pany has but nothing more can The developed a little tube about be desired than the ever -ready statitician has esti- 18 inches long and straightforward, mated that based about 2 inches in sincere delivery which characterized upon the business of diameter which radio experts think Mr. Jenkins' the first ten days in June, department will revolutionize contribution. stores long-distance radio * alone will sell seventy million communication. * * dollars' worth This small contriv- Women of radio equipment this ance of glass and wire, are coming into their own year. The department or some fur- in this day and generation. stores welcome ther development of it, is expected They no radio apparatus as a merchandising to longer sit by the fire take the place of alternators and spin as their proposition because it is the of sev- grandmothers were 'expected business eral hundred times its size. It will to do. of the stores to handle anything that Miss Eunice Randall, a Massachusetts also be virtually -noiseless. is popular ; second, because of girl, has the distinction of its ad- * * * being the vertising value, and third, because it only woman radio designer in the in- brings Scientists at the Carnegie Institute dustry more people into the stores at Washington, today. The work fell to her searching for the radio D. C., have come to lot during the scarcity department the conclusion that Mother of man -power and incidentally seeing many other Earth is during the war, and one of losing pep. Their latest observations the offi- lines of goods. cials of the corporation has been brave have convinced them that for * * * some enough to declare that her work is as reason or other the magnetic power of good It is believed that the and much neater than that done a new radio de- earth is decreasing. by their vice now being perfected * * * male employees previously. by C. F. * * * Jenkins, Washington inventor, even- Los Angeles fans will be glad to When the city council of tually will make it possible in the know that much of local ChM o, interference California, was asked for an event of war for a battle to be watched frequently attributed to amateur appro- via spark, priation of $2000 for summer/ band radio motion pictures by officers stations is believed to be due at to NPX, concerts one evening a week, some their desks as they direct the oper- the naval transmitting station at Ingle- bright ations by radio. wood. and coming citizen suggested This station is particularly the purchase * * * hard to tune of a radio set instead and out and often causes con- have music %The siderable interference every night and for a Navy Department recently re- on 360 meters. longer period than if a concert modeled a former The NPX spark is of band Shipping Board the 500 -cycle was hired. The project met with vessel of the "B" type type, and rather high in in- and equipped note. It is stant favor. It is planned 'to install and commissioned it very different from the musical as a radio repair rotary loud amplifiers and other instruments ship to supply, repair and spark usually employed by amateurs keep in and to make the open air concerts by radio touch with its eight radio traffic and can be readily distinguished from a success. two them. compass stations in Alaska. Its * * * name is * * the "Gold Star." But few Insurance companies are commercial vessels An experimenter at now of- touch these sta- Calexico re- fering policies covering radiophones tions because of their inaccessibility. ports that in that region General Static against the following risks : Fire, * * * has taken the offensive. At times lightning, burglary, theft and trans- In less than two years sparks three inches long could be a nation-wide drawn portation. service has been established from the antenna and part of * *. * by the de- the time a stream partment of agriculture for broadcast- of sparks would Dr. Albert A. Michelson ing jump across the condenser of the weather, crop and market reports plates, University of Chicago, is making ex- by radio telegraph while attempting to listen in. Recep- periments and radio tele- tion of radiophone at the Mount Wilson Ob- phone. W. A. Wheeler, who concerts was ex- servatory to is in tremely difficult. make more accurate charge of the department, says that Using two stages of measurements of the velocity radio -frequency amplification, of light this is having a far-reaching effect in one de- than has been heretofore accom- extending knowledge tector tube and two steps of - of market condi- audio plished. He also plans to make tests tions, and frequency amplification, signals could will inevitably contribute in connection with Einstein's theory of much toward a better be heard, but not by any means under- relativity. system of mar- stood. keting farm products. * * * * * * * * * A chime of bells carried by wire At the So much music occupies the evening lines from Watervleit, Emergency Hospital at programs N. Y., to the Washington, D. that it was a genuine pleas- General Electric broadcasting C., radio is being used ure recently when J. J. Jenkins station to divert the patient's attention of the at Schenectady, N. Y., where it was from City Dye Works, Los Angeles,, and his pains and aches. We rise to re- broadcasted to the listening public, mark that himself owner of the broadcasting sta- was clearly heard we have known occasions tion KUS, recited in Canada. Follow- when the remedy would a poem in the dia - ing this the chimes were have been in- shipped to disputably worse than the disease. August, 1922 Radio Journal --- Page 147 El Universal, a Mexico City daily, various telephones in all parts of the Navy has succeeded in starting, steer- in a news item declares communica- field. ing and stopping a ship by radio tion has been established between * * * alone, and the government has fur- Mexico and Chile through XDA, C. h. McHarg, supervisor of the ther demonstrated the. possibility of Mexico's big station which sends on Cour d'Alene National Forest', has an- guiding torpedoes from planes through a wave -length of about 5300 meters. nourYèed the' installation of a high the air and through the water from The first message sent was one ad- power radio receiving station capable planes and from' ships, by radio. It to the President and people of of intercepting messages 'from a dis; has been estimated that the U. S. dressed mil- Chile, extending greetings to them tance of 3000 miles near Priest River, Navy has more than twenty-five from President Obregon and the peo- Idaho, by the United States forestry lion dollars invested in radio equip- service. ment., ple of Mexico. * * * * * * * * * to the statement of pub- Weather reports for the States east The Los Angeles Times suggests In answer that. the difficulty in procuring good lishers of radio books that "the fad is of the Mississippi River are being out" because they get few re- the naval A audions these days may be due to the dying broadcast from radio. vacuum quests for books on radio, Arthur similar program has been put into ef- fact that the world's supply of may be exhausted. This is in line Brisbane says "that does not mean fect at the naval radio station - at the automobile was the with Life's brilliant remark that "after anything. When Great Lakes, Ill., for broadcasting York new, everybody talked about it, bought fifteen Western States careful investigation, the New forecast for crime wave is books about it and organized automo- and for the Great Lakes. police report that the * * caused by ultra -violent rays." bile races on public highways. * * * "Now the races are over, the auto- In Michigan every motorcycle used The Air Service has succeeded in mobile is taken for granted, but it by the state police will be equipped steering airplanes by radio ; the U. S. hasn't `died out' exactly. with a wireless receiving set if ex- periments now being conducted by the state public safety department are suc- cessful. A broadcasting station will be set up and every agent of the state police kept in constant touch with general headquarters by code messages sent by wireless. * * * At a gathering of noted scientists the John Fritz gold medal was re- cently awarded to Guglielmo Marconi for the invention of radio telegraphy. In making his speech of acceptance, Marconi voiced the hope that radio would be used as a medium for the substitution of good will for suspicion among the nations of the world. He further expressed himself as having realized that "in America more than anywhere else, the most cordial and generous encouragement is given any honest endeavor to apply science to useful and practical purposes." * * * A new device has just been' per- fected and patented by Spencer B. Moxley, which it is said will enable radio broadcasting to be done without the use of transmitting bulbs in the sending station. Will Breniman, who is with Mr. Moxley in the laboratory of the Radio Concert Equipment Com- pany, predicts that the new transmitter will in a short time eliminate the use of vacuum tube sending sets. Greater clarity of transmission and simplicity of operation over the tube sets are claimed. * * * Passing radio programs about the Shell Oil field on Signal Hill over a private exchange telephone is a nightly occurrence, according to Arthur Ed- wards, of Long Beach, Calif., who is Photo by International Newsreel giving his fellow -employees a free attaches one of SHE ORDERED LIGHT AND GOT MUSIC concert daily. He PREFER to the telephone micro- BUT THAT ISN'T A HALF BAD SUBSTITUTE. THERE ARE THOSE WHO his receivers ANGELES INVENTED THE THING. and the private exchange tele- MUSIC TO LIGHT. MISS PAMELA RAINS OF LOS phone IT HER RADIO PHONOLIER. phone operator switches the lines to IT'S A GOOD IDEA. SHE CALLS Page 148 r- - Radio Journal --- August, 1922 The First Nevspaper Broadcasting Said Caesar, with a triumphant flourish, "Veni, Vidi, Vici." And there was no doubt about it-he had and he did. But like say, Caesar's conquering journey is a jaunt around the block in comparison with conquered the Radio. A flash-and Radio world. This article tells how Radio started. THE original conception of the that a more efficient working arrange- These "Man in the Moon" radio broadcasting idea as a ment might be made stories with the West- were the first in the country journalistic enterprise had its inghouse Electric and Manufacturing to be source in broadcasted for children. They were the mind of the edi- Company, which had constructed on torial staff of the Sunday its East a part of the original program. The Call, Pittsburgh, Pa., and Spring- first of of Newark, New Jersey, William F. field, Mass., plants these stories was told early in radiophone trans- October, 1921, and B. McNeary, who returned from four mitting stations of since that time the type proposed there has never been a Tuesday years in Europe in connection with the for the Sunday Call Building. or a military intelligence department Friday night when the army, at least of the Returning to Newark with this 65,000 United States Army to resume plan, strong, of big -eyed little listen- his a conference was held with officials ers newspaper work in that city in August of have not gathered about their re- the Westinghouse Company, at which ceiving sets to hear of 1921. While engaged upon a series the the voice of the Sunday Call's project was outlined "jolly old story -teller from the Milky of articles on conditions in Poland and in detail. adjacent Immediate co-operation Way." European countries in which was obtained from the Westinghouse he had spent the last two years The Man in the Moon of his Company, which set to work on the stories come stay abroad, he developed the idea of construction of from the sympathetic pen of another putting a ,high-powered sta- a definite program of news, tion on the roof of its member of the Sunday Call staff, Miss sports, musical concerts Newark plant Josephine Lawrence, and children's at Orange and Plane streets, Newark. a writer of juve- stories by radiophone in the air and Parts and nile stories and editor of the chil- linking apparatus were rushed to this up with a special depart- Newark by courier dren's page of the Call. To Miss ment of his and within two Lawrence's paper. weeks the Sunday Call -Westinghouse interpretation of the Man in the Moon idea The idea sprang from a visit with station was licensed to broadcast is due the great pop- by ularity which these Edward J. Malone Jr. of Bloomfield Arthur Batcheller, United States radio stories enjoy. The to the home of Louis inspector of the request of children to have stars Weber Jr. of Second District, Ra- named after Englewood, where Mr. McNeary was dio Division of the Bureau of them has been so great Naviga- as to threaten the depletion invited to listen -in on a new radio re- tion. . of the Milky Wày. As a corrector ceiving set which Mr. Weber had just The famous Man in of chil- the Moon of dren's morals, the Man in the Moon installed at a cost of $2,000. ' Over this WJZ is no other than Mr. McNeary. wields apparatus, which is great sway, and in the last one of the most eight months elaborate amateur stations in he has endeared himself the to numbers as large United States, came the voice of an- as they are ines- other amateur timable. Letters have been received in Jersey City chatting from parents with a fellow amateur in Brooklyn. and children as far east as Maine and as far west as the Rock- The effect of , those voices in the air was at first ies. It has been necessary to add to startling, but the subject the matter of the conversation Sunday Call staff in order to han- was- unin- dle the teresting. It became apparent that Man in the Moon's mail. the utility of radio could be greatly His method in gaining the co-opera- enhanced by substituting something of tion of the children is fascinating, as real public interest for the aimless may be seen from the following ex- chatter that was then filling the air. tract from a recent issue of the news- Setting to work upon this principle, paper originating the feature. Mr. McNeary in a few days perfected "Good evening, boys and girls. This a tentative program of interesting ma- is the Man in the Moon speaking. terial and laid it before the managing Tra -la! Tra -la! I feel as blithe and editor as of the Sunday Call, who imme- gay a-as a sunflower ! Yes, sir, diately saw its utility, indorsed the I'm as chipper as a butterfly and as plan, and gave it his enthusiastic co- happy as a lark. There now, doesn't operation and support. that tell you I'm smiling? You'll never in the It was the original plan of wide world guess where the Sun- I've been, so I'll day Call to establish in its Market tell you. I have been to a May pole ! street building a powerful dance The Star chil- radiophone dren took broadcasting station. An appropria- me and we danced around tion sufficient the May pole and wove the ribbons in to defray the cost of the and latest and best type WILLIAM F. B. McNEARY out, till there were no more of transmitting streamers left station was voted by the to weave. I had a yel- board of di- RADIO EDITOR OF THE NEWARK, N. J., low ribbon rectors of the Call, and Mr. McNeary and Baby Twinkle Star SUNDAY CALL, WHO IS KNOWN TO had a blue one was sent to Washington to interview and Belle Star's was THOUSANDS OF NEW YORK CHILDREN AS pink and government officials concerning Hercules had a lavender rib- the THE "MAN IN THE MOON." BILL, WE bon. I wish license and wave length. These you could have seen that de- HAND IT TO YOU, YOU STARTED SOME- pole when we had finished-it tails were tentatively settled to the THING was as BIG. WE WOULD LIKE TO HEAR pretty as pretty could be. satisfaction of the Department of YOU OURSELVES. COME OUT TO LOS AN- "Then we had ice cream Commerce, when it became apparent GELES AND LET'S GET ACQUAINTED. and cake, and we laughed and talked so long Radio Journal - Page 149 RECORD after that, the Star children and I had beside it, a chip of a baby star for her LONG DISTANCE to run all the way home, so that i little brother, Lenox McCrea, who is What is believed to be a new record wouldn't be late to tell you a story only 2 years old. You'll take good in distance transmission of the human tonight. The May pole dance was a care of your star, won't you, Bernice, voice by radio has just come to light birthday party-one of the Star chil- and never mind if Baby Brother does receipt of a postal card post- or tear them; in the dren's cousins had a birthday, and all cut up your paper dolls Chignik, Alaska, and mailed re- little to know that he should marked the way home Twinkle Star was he is too April 30, 1922, via the S. S. Reuce. minding me not to forget to speak to not destroy your things." which was received by genius, The message birthday children. As if I could! To our mind this is sheer Mr. F. P. Dalton of 121 East 23rd I never have forgotten the we can imagine that veritable Goodness, and St., reads as follows : "Radio 6KY. birthday children, and I don't think hosts of children within hearing of heard a phone station that Tuesday and I believe I I'll begin now. WJZ sit wide-eyed on seemed to sign your call. Here's the Friday nights at seven o'clock when "The very first birthday star tonight dope -6:10 p. m. (coast time) : Heard shall go to little Vivian Grace Clark, the Man in the Moon is "on the air," hundred meters loud but nearness to fairy- voice on two who is 5 years old today. Vivian, entranced with their hard to make out words, seemed to you'll find your star just over your land. be calling 6 AAT. Then you came on house on Perry street, New York. The Detroit, Mich., City Council with buzzer and said Q. R. M. (inter- And now if you would like me to tell recently approved an appropriation of fering) and gave him C. U. L. (see you where there are some birthday $2500 for installing radio equipment you later) and that's all I got. It presents hidden I will. Do you want for the police department of that city, being full daylight, signals were of me to tell you, Vivian? Well, then, I for the purpose of increasing the effi- course rather weak. Please verify it will. I am quite sure that if you look of the department. Apparently this is true. Write to 7BJ. Mail will a ciency in your doll house you will find criminals will be caught "on the fly" be forwarded. 73 (best regards) locket and chain from your daddy ; hereafter. from Geo. Sturley." Mr. Dalton states and look in the doll carriage, Vivian, * * * that data in his log confirms this and see if there isn't a bracelet there It is predicted that signatures and message. from mother, dear; now look carefully that time Mr. Dalton has dis- a thumbprints can be sent by radio for Since all around, and you ought to find The recent posed of this telephone set to the Y. M. hankies from purposes of identification. new dress and some the tranmission of a picture C.A. Radio School of Los Angeles, a jumping rope from success in grandma and radio leads to this belief. where it is being used for instruction. sister Edna. But, oh,Vivian -before by you go hunting for presents let me name a star for each of your little guests : that is, a star for your sister, Edna; a star for Carol Fistere, Ruth Cornelius, Nettie Cornelius and Edith Cornelius. And don't forget to keep your own star brightly polished, Viv- ian, will you? "Another little girl who is 5 years old today is Winifred May Mills. I have named a happy, smiling birthday star for you, Winifred, and it shines down on One Hundred and Firty-fifth street, New York, where you live. You had a birthday party, didn't you. Winifred? That was fine. And I hope the birthday cake was just de- licious. "Then I have named a chip of a baby star for you, little Marie Edith Sonn, because you are just 1 year old today. You had a birthday party this afternoon, didn't you? Of course you did, a real birthday party, like a big girl. You have taken good care of the little star I named for you some time ago, I know, because I've seen your picture since, and you looked as smiling and happy as only a very good baby girl can look." After this comes the story, which winds up with-"And that is the end of the story, and I'll have to hurry up if I am to send you a few messages before Mr. Sandman gets here. Her- to me that cules has just whispered Photo by International Newsreel he has seen the last butterfly flying WHOODA THOT IT? over to Mr. Sandman's with a dream to a little girl. I HERE'S YOUNG EMORY ZIMMER OF CINCINNATI USING AN OLD BUMBERSHOOT for him to carry IN," to tell Bernice McCrea that I FOR AN AERIAL. IT WORKS, TOO, BUT EMORY DOESN'T, WHEN "LISTENING want FLAPPERS DISCARDED have named a star for her, a Hillside AT LEAST. WHAT'S NEXT? IS IT POSSIBLE THAT OUR W. K. avenue, Glen Ridge Star, and close THEIR STAYS TOO SOON ? Page> 150 Radio Journal J r -Z August, 1922 Wave Lengths

By F. S. FARNSWORTH

There are waves-and then there are some more waves. There are wet waves, and dry waves; hot waves and cold waves pink waves short and yellow waves; waves and long waves; marcel waves and water waves and permánent waves, and some don't. If you have gotten thus far you owe it to yourself to read this article and learn some about Radio Waves.

lwHAT does '150 to 680 of rest. The velocity of waves of all ' The wave length decreases as meters ? the wave -length' mean kinds depends upon the nature and frequency increases. is a question invariably amount of elastic forces which cause asked by the layman the displacement of the particles mak- We find, therefore, that "150 to 680 in radio communication ing up the wave. If a fixed meters wave ,length" means that the point 'is receiving Those having purchased a radio re- watched upon the surface of the pond system is so designed that it ceiving set especially for the reception over which the waves are moving, it may be tuned to any . desired wave of the radiophone have tried to settle will be noted that a wave crest appears length: between, 150, and 680 meters, in their own minds just what this at that point every second of timel and that when'so_tuned only the waves means. This number is the "frequency" or of that length will act upon the re- The metric number of the waves. Different kinds ceiving instrument. The wave length system which is here depends upon used is a system of weights of waves have frequerícies which vary the frequency of the and meas- greatly. oscillations propagated at the sending ures using the meter as the unit of Large ocean waves may have measurement. a frequency of only two per minute station and does not ,indicate the dis- The meter is one -ten - tance over millionth and one-half mile in length. That is, which the waves will travel_ of the distance on the earth's The amount surface from the pole the crest of one wave will pass a given of power used in sending to the equator, at any.. given 'wave length, and is legalized as equivalent point every thirty seconds, and the dis- together to 39.37 with the resistance of the medium inches in the United States, and tance between them will be one-half - through which 39.37037 inches iii F rälice and Great -- mile --o a- "wa-ve --length" -of--804.37 the wave must pass, de- Britain. Reduced to our linear sys- meters. termines the distance to which it can tem, 150 meters is 5905.5 inches, 151 Waves of yellow light have a veloc- be sent. meters is 5944.87 inches, etc. ity of 300,000,000 meters per secorlid. . "Tuning" is accomplished a frequency of 600,000,000 meters per by ma- "Wave" is the disturbance of the nipulating the various second, and a wave length of only one - parts of the re- equilibrium of a body or medium twenty ceiver unit to -thousandth of a ' centimeter. secure a 'point of reso- which is propagated from paint to Electric waves have a nance or harmony point velocity of 300,- between it and the by elastic forces with a continu- 000,000 meters per second ous motion, and a fre sending instrument. and is applied to various I forces, such as sound waves, light waves, electric waves, etc. D "Length" as applied to waves is the distance from crest to crest or from any two similar points. Therefore in periodic motion taking place in " any medium the length of the wave is the distance from any given particle in the medium to the next particle which has similar displacement and motion. The wave lengths used in radio communi- cation range from 100 to several thou- sand meters, the radiophone or broad- casting in general being assigned a wave length of 360 to 680 meters. A Let us apply these definitions. With B a certain device we cause stones to be FROM C TO D ONE. WAVE LENGTH 680 METERS dropped into a pond of quiet water FROM' A TO B ONE WAVE LENGTH 680 every second of time, the stones being METERS of the same size and weight, each stone quency which may be varied thereby An apartment house producing one wave only. All of the changing in South Pasa- waves the wave length. Using a dena provides that are produced will be the simple formula, cC-wave radio service for its same height and an equal length, V- distance velocity, N-frequency of oscillation, guests. It has two magnavoxes, one apart, and will spread out in all direc- enables us to determine the wave of which is kept in the music room. tions until they meet the shore or ap- length The other may pear when the frequency is known be taken to any one to our eye,-which is the detector or the frequency of the fourteen apartments of these particular when the wave length as desired. waves,-to die is known. A building association in away. The height of the crest Chicago ad- of these vertises that it will not only wire waves depends upon the size V every of the home for electric light and power but stone which causes the displacement of install aerials the water's and attachments for surface from its position N radio receiving sets. August, 1922 Radio Journal Page 151

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIH111111111111 1111111111111111111111011111111111111111111111111111111 11111111111111111111111111111111111111111111111111111111 11111111111111111111111111111111111111111111111111111111

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Mirandy at the Tub

By FLORENCE G. ROGERS Illustrated by C. H. Döllinger

Laws, Honey, run erlong and play.

Don't stan' dere lak a oogley gloo ! Yo' want to lissen in, yo' say? Well, jes' yo' wait till Ah gets through. Ah needs dis radio in mah biz- It maks mah washin' go Gee Whiz!

w Laws ! dis am jes' de scandlous tune ! Wiggely, jiggely, rip, zip, bing! Gibs new life to dis ole coon.

IVIaks me wuk lak anything ! Rub-a-dub-dub-mah ahms jes' fly When de band gets busy in de sky.

Ñow what's dis noise ?-f o' massy sake ! Screechin' lak de cyars go by ! Lak to mek mah ole haid ache. Must be ructions in de sky. 'Umph ! wha's dat he says it wuz ?- "Du -screechy" sung by Madam Huzz. Won't nevah get mah washin' done Onless dey jazzes up de band.- De "Coontown Blues !"-tum, turn, to turn! Dat's de bizness !-Dat's jes' gran' ! Mah wash gets done afo' Ah knows A-keepin' time as Ah rubs de clo'es.

Wha's dat he sayin' ?-Spo't events ! i Well, glory be ! mah washin's done. Whar's Rastus ?-ain't dat boy got sense ?- Oh, dar yo' is !-Yo' want some fun? Den lissen how de baseball goes Whiles M'randy's hangin' out de clo'es.

11111111111111111111111111111111111111111111111111111111 001111111111101111000001011101111111111101111 11111111111111111111111111111111111111111111111111111111 o 11111111111111111lIl111111l111111111111111101111011111 1111111111111111111111111110111111111111111111111111Ili 1 1111111111111111t1101111111111111011111111111 11111111111 1111 1111111 1 1111 11 II 11 Illilllllll 111111 ®=I=1 ® Page 152 Radio Journal ---7 August, 1922 Directional Radio

No one could accuse radio of being exclusive. Everything put "on the air" has been for all who cared to "listen in." Broadcasting is one step of progress. Now we want to shoot radio to one person. Can it be done? From its beginning, radio of radiation, all trans of which we have almost than in long -wave forms. Possibly mission has been an exact broadcasting counterpart in the familiar there is a minor limit below which While the exclusion of undesired searchlight, we may become heirs to a there will reception be no static bugbear. If for has become simple and new form of communication, lying in no other reason than this, the subject of a good order of accuracy, scope between the exceedingly private thanks is one that ought to claim the atten- to the marvelous selectivity of individual telephone line and the ex- tion of that army of independent resonant circuits, re- intentional sending ceedingly non -private radio broadcast- search students who have made of a message to ing citizen one destination only service of the present time. Per- radio what it is. In a number of ways or even in one direction only has re- haps a closer analogy for the new this mained new field of research should offer to be solved. form of radio communication is the a fascination of technique for heliograph, the This is somewhat odd, for the rea- in which a narrow beam ingenious experimenter. The induc- son that the investigations of Hertz, of parallel rays of light are aimed at tances and capicitances the receiving will be small the first creator of artificial waves of station and there de- ones. Compactness of both trans- the kind we now call radio waves, tected by the eye, aided, if necessary, mitting and receiving by sets can be fully developed the facts that such a telescope as an amplifier. carried to very interesting extremes. radiations can be refracted in passage Signor Marconi suggests as a valu- And the whole arrangement will have through materials transparent to them, able specific application of reflected a new gamut of electrical dimensions, and can be reflected by surfaces of and directed waves the establishment because of the interesting fundamental materials not transparent to them. It of radio "lighthouses," as well as their frequency of fifteen million cycles per is by these means that light waves are use in detecting on one ship the prox- second. collected into beams, directed along imity of another. In this case the chosen paths, and observed at a re- radiation is to be emitted by a ship, The first motor bus to reflected serve music ceiving station. by the hull of another if with rides is now operated by the near, and detected The very first by the same ship California Transit Company. The in- radiophone system that sent it out. was one in which such predetermined stallation is made on the instrument directional transmission In these several new uses, there is board of the bus, so that the driver was fully ac- the common feature complished. It transmitted electro- that it is the can "tune in" without leaving the magnetic short waves that are utilized. Signor wheel. The antenna is supported on waves of an average length Marconi of one fifty -thousandth expressed in the address re- uprights, which are securely braced to of an inch. ferred to above the These very short waves were belief that what stand the vibration it will be subjected brought we now would call very into a parallel beam by reflection from short waves- to while in motion. A magnavox at- say twenty meters-merit some curved surfaces, were modulated by of the tachment is supported on the back of further attention which 'heretofore has been the driver's seat, and every passenger reflection changing their de- expended gree of parallelism, thence transmitted on the long waves. can plainly hear the music. This through the ether Nature seems less prodigal in the equipment works successfully over a to a destination, manufacture where they were finally converged by of static in short-wave distance of more than 120 miles. a last reflection upon a detector. In this system, a high degree of selection of destination was possible at the source, and a similar degree at a receiving station. The whole sys- tem was a true radiophonic one, and was successfully operated before Mar- coni first forwarded the work of Hertz and Branly. For what has just been ,described is the photophone of Alex- ander Graham Bell. Signor Marconi has recently an- nounced, at a joint New York meet- ing of the Institute of Radio En- gineers and the American Institute of Electrical Engineers, that he has de veloped directional transmission to a further degree by the use of radio waves of the usual order of length, though perhaps in some cases short ones as those waves .go. His methods utilize primarily the possibilities of re- flection, and he proposes such use for a special form of broadcasting where- WHAT COULD BE SWEETER? in destinations the may be selected in ROLLING OVER CALIFORNIA'S MATCHLESS BOULEVARDS advance. LISTENING TO RADIO CONCERTS IS OUR IDEA OF ONE CORKING GOOD WAY TO ENJOY LIFE. With IT ISN'T EVERY- the perfection of such beams ONE WHO CAN GET AN EARFUL AND AN EYEFUL AT ONE AND THE SAME TIME. August, 1922 Radio Journal --r r - Page 153

1 \ ¡ I VW» /laftestion Q.-What is meant by a radio com- A.-You do not mention if your Q.-On what wave length are the pass ? fixed condenser was shunted across San Diego and San Francisco time sig- A.-It is a special form of receiving the phones or in series with the cir- nals given out? aerial with which one can determine cuit. Your variable condenser is in- A.-The San Francisco wave is the direction of the transmitting sta- tended to keep your secondary or 2400 meters (undamped), and the San tion. It consists of a loop of a few closed circuit in resonance with your Diego wave is 9800 meters (un- is . turns -of wire and the loudest signals aerial circuit. If your coupling damped) are received when the plane of the loose you need more capacity and less inductance; if tight, vice versa. loop takes in the transmitting station. Q.-I do not want to spend much is much used in giving ships their It receiv- money on a radio set and would like positions during fogs. Q.-Will a pair of telephone receive opera on a by the telephone to know if I can ers like those used not, what do I need? on a wireless set? tuning coil. If linemen work I live about ten miles from Broadway. have a crystal set, and would receivers will not work Q.-I A.-These can receive opera from like to know how to build. a loop aerial satisfactorily, as they are only of 75 A.-You resistance. For radio work they Los Angeles with a tuning coil, detec- for it. ohms tor, head telephone and a condenser. A.-It is impossible to use a loop should be of at least 2,000 to 3,000 resistance. About the cheapest crystal detector set aerial with a crystal set. A loop aerial ohms which would do this work would cost requires several steps of amplification, from $15 to $25. and amplification is only possible Q.-Is it necessary to have the li- through the use of vacuum tubes. cense altered if my station is licensed for spark work and I want to put in Q.-What is the difference between a C. W. set? radiophone and radiotelegraph receiv- Q.-Would it be possible to get per- A.-No. Simply notify the in- ing sets ? mit to use telephone pole which is on spector. A.-There is no difference. boundary line of lot for one pole of aerial ? Where would I get such per- Q.-What is meant by a loading mit ? coil? Q.-Can a partly deaf person work A.-If it would be possible for you A.-When a receiving set does not in radio ? to attach your aerial to the telephone tune to wave lengths as long as de- A.-You will no doubt need an au- pole you would have to get permission. sired, the range of tuning is often in- dion set with an amplifier. from the telephone company. creased by inserting a coil of wire be- This tween the lead-in and the set. am situated about 25 miles coil or a Q.-I may be either a honeycomb from the mountains and 75 feet below Q.-Is an "A" battery potentiometer tuning coil with a single slider or taps I be able to receive receiving set? de- sea level. Would of any use in a leading off to contacts to get the from broadcasting stations 150 miles is desirable sired number of turns through a rotary A.-A potentiometer away ? How high should the antenna when using a gas content detector switch. be and what kind of wire used? tube. These tubes usually require a Would strong winds interfere with re- critical adjustment of "B" battery volt- Q.-Is a knowledge of the wireless ceiving? age, and this is best obtained with the code necessary to receive radio broad- A.-You should be able to receive use of the "A" battery potentiometer. casts ? broadcasting music from two to three A.-No; a simple adjustment of a hundred miles range provided that few knobs to receive 360 -meter wave set. With this What is a variometer and you use a regenerative Q.-1. is all that is required. be able to receive from 200 is it used? 2. What is a you would for what clearly. The anten- variocoupler and for what is it used? to 300 miles very Q.-There are tall trees all about na would be at least 75 feet high, two A.-1. A variometer is an instru- Would the wireless aerial 100 feet long. Strong winds very my house. wires, ment used in tuning to give a have to be put above the trees or could should not interfere with your receiv- close adjustment of wave length. 2, A the wire from a tree t* the your antenna is properly the I run ing provided variocoupler is used to vary house? guyed. amount of energy transferred from A.-You can run your aerial from the primary to the secondary. Also but insulate your the tree to the house, to install a radio tele- the primary is used to change the the end of it does not Q. --I wish aerial so that 1000 mile radius. Is it wave length. than 10 feet to the tree. phone with come closer practical for wireless music? regenerative re- 100 -foot aerial, loose Q.-How far can a broadcasting A.-With a small Q.-I have a tube set you should be coupler, crystal detector and 2000 -ohm station be heard? ceiving vacuum I shunt a depends upon the power able to get the music very clearly, receivers.' Why is it when A.-This hundred miles, and condenser across the second- thé station is using. The average 100- from two to five variable would be able to get it ary of my loose coupler it kills all sig- watt station should have a range of possibly you from seven to eight hundred miles. nals ? 500 miles. Page 154 Radio Journal August, 1922 Radio Signals for Airplanes Radio is proving to be of benefit to human activity in many ways. It is becoming a necessary fast and essential adjunct to the successful operation of; air- planes. The Government Bureau of Standards has prepared a paper of Radio Landing on the use Signals for Airplanes, of which this article is a résumé. Radio direction finders and other A calculation was made which - radio devices have indi The results of these investigations been in use for cated that the signals radiated from some time to assist airplanes to land are given in Bureau of Standards Sci- the two coils would be strongest for entific Paper during the night, during fog, or at an airplane No. 431, "The Field Ra- flying in a given horizontal diated from Two Horizontal other time of poor visibility. The most plane, whenever the Coils," plane was inside a by Gregory Breit. A copy may usual method of using radio for this comparatively small ring -shaped be purpose is area purchased for 5 cents from the Super- to transmit from an orcíi- located above the landing field. After nary elevated antenna at the landing intendent of Documents, Government the coils had been constructed a care - Printing field radio signals which are received ful experimental Office, Washington, D. C.- investigation was Submitted by Bureau Of on a direction finder located on the made under actual flying Standards. airplane. conditions, On small planes the direc- and the results of this calculation were tion finder may be simply a coil of verified. Signals were received A PROPOSED RADIO LIGHT wire wound on the on the fuselage; in larger airplane only when it was nearly above HOUSE planes a small rotatable coil may be and in the immediate vicinity of the In an address before mounted vertically aft in the plane. the Institute landing field. A Curtiss Type R plane of R,adio Engineers and the American This method gives the direction of the was used for the experimental work Institute of Electrical Engineers on landing field, but does not give accu- for both the induction his recent rate information signaling and trip to the United States, as to its distance the radio signaling. Signor Marconi announced when the plane is the inven- near the landing tion of a searchlight field. The Bureau of Standards has just by which the utilization of radio waves Several years ago the Bureau published a paper giving the theory of would flash of beams of light nearly a hundred Standards was called upon the radiation from an antenna consist - miles. to develop His invention takes the form a method to assist airplanes to accu- ing of two horizontal coils, as used in of wires specially arranged on a rately locate the this work. It is found that - tower or landing field when the if a ver masts. By means airplane was quite tical coil antenna is used for reception of the reflecting near. It was de beam of electrical radiation sired to develop a method which would on the airplane, and if the airplane it is pos- flies horizontally, sible for ships, when within a certain give a good signal which would be the maximum signal distance, is received when to ascertain in thick weather easily audible over a comparatively the line joining the the airplane to the bearing and position of the light- large area when the airplane was at transmitting coils house. comparatively high altitudes, makes an angle of 30° with the ver - but In addressing would be localized within a small. area tical, assuming that the effect of the the joint meeting when the airplane was earth is negligible. The region of Marconi expressed himself as believ- near the ing ground. The accurate location space within which the signal can be "it should be possible to design of the apparatus landing field is very important when detected by receiving instruments of by means of which a ship near the ground. given sensibility has nearly the form of could radiate or project a divergent A method of induction the space between two inverted coax - beam of the short-wave rays in any signaling desired was first tried, using 500 -cycle alter- ial vertical circular cones of finite direction, which rays, if com- nating current. This length having" their common apex at ing across a metallic object, such as current flowed another through a large horizontal single -turn the transmitting station. The upper steamer, would be reflected coil, 600 by 800 feet, at the landing limit of the region within which the back to a receiver on the sending ship field. The coil was tuned to 500 signal is audible depends on the sen- and thereby immediately reveal the cy- presence cles, so that a large current flowed. sitivity of the receiving apparatus and and bearing of the other ship For the induction signaling the recep- is not as clearly defined as the bound- in a fog." To illustrate his lecture he tion on the airplane was made using ing conical surfaces. The signal van- exhibited pictures suggesting the weird horizontal coils wound on the lower ishes when the airplane is directly over apparatus described and pictured in wings of the airplane. It was found the transmitting station, and vanishes imaginative tales of life on other that this method gave a signal which rather soon after the airplane passes planets. was audible over a wide area when the over the region of maximum signal airplane was near the ground, but was and flies away from the transmitting MORE STATIC confined to a small area when the air- station. plane was at an elevation of about a The effect on the transmission of Marconi has discovered that a cer- mile. This was not satisfactory. . having a perfectly conducting earth tain kind of static called "grinder" The use of radio -frequency waves directly under the transmitting coils originates over Africa and another was therefore undertaken. Two hori- has also been investigated, and it has violent "click" type over South Amer- zontal coils were placed one above the been found that in this case a maxi - ica. He has further discovered that other. The coils were identical in con- mum signal is obtained when the line when short waves are used disturb- struction, and placed so that their axes joining the airplane to the transmitting ances caused by static are practically coincided. The current in one coil station makes an angle of 26° 34' with nil. flowed in a direction opposite to the the vertical. It is expected that these Marconi recently expressed himsel f current in the other coil. A fairly theoretical studies will be very useful as being of the opinion that there was high radio -frequency, suitable for di- in the design of radio transmitting sta - something in the idea of the wireless rection -finding work, such as 300 kilo- tions for sending localized landing sig- waves traveling around the earth by cycles, was used. nais to airplanes. various ways and reuniting at the Aùgust, '1922 Radio Journal Page 155 antipodes. He declared that the great dio fans. The military reservation is wave length of 2h50 maters. The. new station built by the Radio Corporation to have a radio fire alarm system. Arlington set will he much more pow- of America at Port Jefferson, Long Sergeant Chas. Durenmatt, U. S. A., erful than the naval air service station Island, the most powerful on this con- Presidio' fire chief, is working hec- at Anacostla, D. C. It has been inti- tinent, sent waves that "preferred tically to get it completed. When they mated that Arlington, with its new to travel three-quarters of the way are not fighting fires they'll be enjoy- equipment, will be the broadcasting around the earth. rather than to come ing themselves with the broadcasted center for important governmental by the shortest way round." concerts. When the new radio sys- announcements, such as presidential Of around-the -world wireless he tem is completed, the Presidio will be addresses before Congress, and it is said he had obtained results "which the first syncopating fire department even possible that the' proceedings o' go far to show the relative facility in the United States. Congress will be broadcasted thr a gh With * * * this station. which radio signals can now be * * * sent from England to Australia. He The Federal Government, in the explained that if the signals are un- person of Assistant Attorney 'General Another clog has been reported as readable because of static, the measur- John W. H. Grim, says that the sale having been paged by radio. A man ing apparatus is used to send to ati of worthless radio equipment would in Los Angeles called his clog in Pasa- operator at a standard rate of 20 .come under the head of fraud. The dena by radio, and the animal went words per minute, five letter code, and Department of Commerce has been to the receiving horn as he would a the voltage applied to aerial from the the recipient of complaints of exces- rabbit hole in an effort to find his local sender is increased until com- sive prices on radio equipment, but master. plete readability is obtained. In this the Government has no way of con- * * * way he obtained at once a very cor- trolling prices. In Washington a reconvention of rect estimate of how much power was * * * the National Radio Conference is be- needed to drive the signal through. The naval radio station at Arling- ing held. It ins expected. that in this ton, Va., has just installed its radio- conference all matters relative to ra- The Presidio Fire Department is telephone equipment and will start a dio regulation will be placed on a sat- the latest addition to the army of ra- regular broadcasting program on a isfactory working basis.

Radio, as Seen by - - - - - C. H. Dillinger

WHICH MAKES THE LADIES' RED PLUG! SEWING SOCIETY 100, DURING THE PHASE EFFICIENT OF SPRING FEVER THERE'S ALWAYS SOMEONE WHO IS TAKING THE JOY OUT OF LIFE _

DEALERS SHOULD FURNISH RADIO NO KICK IN RECEIVING SETS WITH NEW CARS STOCK REPORTS AND GIVE DRIVING -BUT SHE HAS INSTRUCTION THRU HOPES/ THE AIR, Page 156 Radio Journal -T August, 1922

When a man is compelled to get into Margie : And he had radio eyes ! When the sheriff of Skeedunk first his evening clothes to in a listen on Sue : What do you mean, radio heard the radio concert he called out radio concert at his own fireside,- eyes? the volunteers. He thought a riot well, we have his wife's number. Margie : Oh just eyes with a broad was on. cast. * * * After a two weeks' vacation at the seashore Eddie came back to work with a heavy coat of sunburn. Upon arriving at the office the following conversation took place : "Got a radio at home now boys." "But why all the sunburn?" "Been down to the beach measuring While performing before a large wave -lengths." audience one evening a concert harpist * * * Down Santa Ana way the judge found that the strings of his instru- Visitor : Why all tf_ excitement, passes up the speed of radio -186,000 ment formed a perfect radio aerial, dear? miles a second is too fast for a mere and the music from a broadcasting Mrs. Uptodate : Oh, my dear, the traffic cop. concert seemed to emanate from them. radio program starts in a half hour; * * * The audience never knew the differ- it keeps up all day, you know, and I "What are your husband's . symp- ence, and the harpist went under the just can't get a thing done ! toms, madam ?" asked the famous stage and played put -and -take with the alienist. stage hands, and the harp kept right Patient's wife : "Why, John always on playing. Of course, the harp gave seemed sensible enough up to last the music an Irish touch. night, and then he sat all evening * * * listening in-and didn't have his set It's about as easy to convince some hooked up." people of the possibilities of radio as * * * it is to raise an umbrella in a telephone Irate husband : Norma! Why the booth, and the chances in the follow- Samhill have I got to wear buttonless

ing case were as thin as a banquet shirts, I'd like to know ! sandwich. After two or three minutes Apologetic wife : But Harvey, dear, of listening in how can I sew on the evening concert One day an idea creeped into my dome buttons on when it via a loud takes me speaker, the obliging lady on That I'd have a radio in my home. all day to keep tuned in? the left turned to * * * the operator and So with the aid of some junk and a said, "Say, Mister, that will run down All broadcasting in the U. S. being if couple o' jerks you don't wind it up." I put one together,-and the darn done cafeteria style-help yourself. * * * * * * thing works ! Get the "Oh, Clarice, isn't it just too grand * * * screwdriver, Bob, the darn for anything-they say that you can thing stopped ! President Harding has installed in listen in on this radio !" * * * * * * his study at the White House a high power radiotelephone with a wave- Michigan is establishing state radio Recruiting by radiotelephone for the length capacity of 25,000 meters. stations to disseminate weather fore- Air Service of the United States was casts, crop reports, bulletins * * * on condi- inaugurated recently at Mitchel Field, tions of roads, forest fires and other Garden City, Long Island, New York. Hubby (returning home on the information relative to public safety. 5 :15) : Ain't dinner ready yet ? What the !cxzy ! ? Wife (flying around like one pos- sessed) : Oh dear, Professor Lovely was giving the loveliest talk on The Primal Oodlums of the Super Twid- dledees, and I just had to listen in until he got through. * * *

Harold : First time Dave listened in he got seasick. Otto : How come ? The crime wave. Harold : The waves were too rough. Ecstatic August, ] 922 Radio Journal --7 Page 157 Radio's Place in (The Sun There are always those who are "f erninst" anything new. Why, the farmer who first used an iron plow was almost mobbed by his neighbors, who thought the iron would poison the soil! Interested parties need have no fear that radio will displace the theatre and phonograph. Rather, it is creating its own place in the sun-and doing it well.

HE manager of the Westing- than any then in use, and the pos- of business anticipated in this field is house Electric and Manufac- sibilities of radio were immediately estimated at close to $100,000,000 a turing Company's broadcasting recognized. Governments gave their year. station in East Pittsburgh, Pa., support, and years of development Production does not have to wait is but one of many authorities were crammed into a few short upon the practical perfection of the who hold the following views on the months. On account of the necessity phenomenon. That has been accom- present and future status of radio. of maintaining secrecy the public was plished. True, improvements are being Enlistment in the army of radio kept in ignorance of the details of made, and always will be, but radio is fans still keeps in advance of the development, and now that radio has a practical, working reality. supply of equipment. But history re- been handed over for general use in Broadcasting of news, market and peats itself as in the instances of an almost perfected condition, every- financial reports and concerts has de- the automobile and phonograph and one is bewildered with the suddenness veloped quickly, the entire country is photoplay-once a cheap set is tried of its accomplishment. clamoring to "listen in" and the de- out the enthusiasm of the buyer leads Now everyone yearns for a set in mand is increasing ' at a pace little him almost invariably and immediately his own home. It is part of human realized by the public. As has been to wish to possess a better set, with nature to want to know what is going ably said recently : amplifiers and loud speakers so that on in this busy world and the wire- "In its popular conception, radio everyone in the family may share in less telephone is the latest means for broadcasting is the transmission of the entertainment, not merely the one gathering that information. recreational and educational material who gets the head -phones first. As a direct result of the spread of by radio telephone for the benefit of It may be said in parenthesis that public interest in radio broadcasting, all those who may choose to listen. It no alarm need be felt, either by the there has grown up a new and im- is an irresistible magic which has sev- purveyors of show -house amusements portant American industry-the man- eral millions of people in its grasp; it or preachers in their pulpits, lest this ufacture of the equipment necessary is a fountain source of enlightment new form of entertainment will have to receive the speech and music broad- and culture opening a medium of edu- a bad effect on attendance at their casting from the transmitting stations, cation that surpasses the facilities of formal gatherings. It will merely of which there are now about 200 in all the colleges and universities in the serve to whet the appetite of hearers the United States. The total amount country." for complete, satis faction wherever the radio samples are found desirable and delightful. Neither will radio entertainment supplant the purchase of phonograph records or curtail automobiling. It cannot rival either. There is no more reason to think that radio will dwarf any existing business to its detriment than there is to believe that radio broadcasting as a new form of pub- lication will put newspapers out of business. Radio intelligence and entertainment will occupy its own field and not in- terfere materially-or more than tem- porarily, anyhow-with other business pursuits. It adds, however, a won- derful thrill to the routine of daily life, a new spur to interest in things outside of ourselves, and brings us into contact and comprehension of much that otherwise we might know nothing about. Another authority has pointed out that up to the time of the Great War's Photo by International Newsreel beginning radio was largely experi- QUICK, WATSON, THE TUBE! mental, being about 75 per cent theoretical and 25 per cent practical. OUR LUSTY YOUNG FRIEND, RADIO, WASN'T SATISFIED TO INVADE THE The radiophone was still more of a MATERIAL WORLD, BUT HE NOW MUST NEEDS GET INTO THE SPIRITUAL WORLD. dream than an actuality. Individual SIR ARTHUR CONAN DOYLE SEATED AT THE RIGHT) BELIEVES THAT WE WILL experimenting was too costly for de- BE ABLE TO COMMUNICATE WITH SPIRITS. HERE HE IS SEEN TALKING ABOUT IT velopment to progress rapidly. But TO HIS FRIEND, F. D. WALLER (SEATED AT THE LEFT). IF ANYONE CAN DO IT the war demanded a more rapid means THAT ONE OUGHT TO BE "SHERLOCK HOLMES." Page 158 Radio _ August, 1922 ApparatusJournal That The "TOURIST" Audion Receiver, as clear as a bell itself. It is the most compact complete self-contained receiver that was ever con- ceived and offered to the world. The cabinet is of hand -finished black walnut, each a separate product. The panel of velvet finish XXX Bakelite. The metal parts of hand -buffed nickeled brass. The con- TOURIST denser, a vernier 70..519 variable with a thousandth part of a meter adjust- ment. Tuning away static and other disturbances with the slightest variation. The tube base a California patent. The grid leak and con- denser a California patent. The plate "B" battery designed by Cali- fornia. The storage cells designed by California. Manufacturing by Hobbs. The case contains phones, aerial wire, two moulded insulators, ground stake and wire, storage cells, dry cells, tube (Audion) resistance, variable con- denser inductances and all small parts. For autoists the battery charges from The TOURIST the dash socket or uses the car battery at will. Far from civilization, still in constant touch, is what the "TOURIST" Size 11x6x8 inches over all. offers. Bunked down by the old camp fire-smoking up on the ole jimmy pipe -hearing the news, the concerts with the world at your finger tips, yourself and your camp companion. The California "TOURIST." Range, broadcasting wherever you are in the state. Priced at $75.00 complete. Hobbs Battery occupies space where phones are shown, in cut. Phones and antenna wire, insulators occupying space in lid. Heavy nickeled carrying handle, one cabinet lock, two keys. For sale by Western Auto Supply Company. Forty stores in the States.

The "CALIFORNIAN," the supreme concert receiver for home use. Crystal clear it is. California quality throughout. It is the most accessible cabinet receiver made. The panel swings out with all parts mounted thereon, everything before you as it should be, a California feature. The cabinet con- tains a twenty -three -plate condenser, inductance, tube base, grid condenser and leak, rheostat and accessory parts. The panel is of genuine XXX Bakelite. All metal parts polished nickel plate. Genuine Bakelite dials and knobs. Cabinet of genuine mahogany. Size 8x8x7 inches. With plate battery and above equipment, priced at $35.00. With Truetone phones, 70 ampere Hobbs battery and tube (Audion), The CALIFORNIAN $65.00.

The ANGELENO Concert Crystal Receiver. For those closer in to the concerts and not desiring to make a larger expenditure, we have made this receiver. In crystal sets it is unique and is the leader. The circuit was originated at the Bureau of Standards, Washington, D. C., as the most efficient possible ANGELENO for 5t.. 2E84 radiophone work. Its range is conservatively estimated at 50 miles for good clear reception. The panel is of genuine Bakelite. Bakelite knobs. Metal parts are of brass, heavily nickeled and polished. Bakelite binding posts. The case is of Leatherette, Dupont finish, and is indestructible. Nickeled carrying handle and hinges. Furnishing a generous piece of True - tone mineral-every spot a good one. Ask the man that owns one as to the efficiency of the California Angeleno Receiver. Priced right within the reach of all. Without phones, $12.00. With The ANGELENO Fruetone phones, $17.00.

SOME OF THE SOUTHERN CALIFORNIA DEALERS Woodill Hulse Electric Co., Pasadena, Cal. J. M. Kennedy Co., Los Angeles, Cal. The Radio Shop, San Diego, Cal. King Furniture Co., Santa Paula, Cal. Electric Engineering Co., Los Angeles, Cal. Radio Specialty Co., San Diego, Cal. Orange County Piano Co., Santa Ana, Cal. Electric Appliance Co., Pasadena, Cal. Manual Arts Radio Shop, Los Angeles, Cal. Southern Electric Co., San Diego, Cal. R. E. Brackett Co.. Pasadena. Cal. X -Ray Supply Co., Los Angeles, Cal. Brode Electric Co., Los Angeles, Cal. The Electric Shop, Pasadena, Cal. Richmond Hardware Co., Los Angeles, Cal. Crescent Music Co., 1st and Spring Sts., Los Angeles. The Light House Service, Venice, Cal. If your dealer does not handle California apparatus, we would appreciate your sending his name and address. August, 1922 Radio Journal Page 159

All Apparatus of California Radio Co. origin carries a guarantee bond Lives: of one year. Apparatus, built to stand the test of tests -Time. Built to a principle, that principle being, to build the best that skill and brains can conceive, weaving into each small part that principle. It is the handiwork of skilled artisans whose years of radio knowledge is crystalized in California apparatus. As the ancients built the pyra- mids, the artisans of today have made California Radio Apparatus a monument to the art. As the pyramids have stood the test of time, so shall the apparatus originating in the shops of California Radio stand throughout the age of radio. Not to be obsolete in a day or month or year, but to live on and on. Apparatus with a soul -IT LIVES. They came in '49 for gold; and again they come, for radio, from the world over. California is supreme. The Great Western receiver, with this set, receives signals from all over the world. Amplifying from its first tube, it brings signals in with tremendous volume through its three steps of amplification. Power transformers, permitting the use of five -watt tubes for ampli- fiers, are possible, opening a new vista for those that have been striv- ing for a long distance concert and signal receiver. Piano finish mahogany cabinet. Bakelite panel. Size l 0x 19 inches. Plenty of space, preventing induction. All parts mounted on back of the panel with unit construction, allowing easy removal. It pleases the eye and satisfies the most critical listener or expert. Three -step and detector with tuner, vernier condenser. Priced, without tubes, at $125.00. Complete with tubes and all accessories, $200.00. Magnavox extra, $45.00.

Western representatives for Estru Lattice Variometers and Variocouplers. The most compact and efficient made. Size 21/2 inches. Ideal for portable sets. Using only ten volts on the plate of the tube. Variometers, plate and grid, $6.00 each. Variocoupler, $5.50 each. Western distributors TRUTONE Phones, 2500 ohms, $5.00 pair. Detector Panel may be used for table mounting as a unit or may be mounted in any panel by drilling two holes. Mounted on panel is the tube base, rheostat, mica grid condenser and grid leak, and the necessary binding posts for all possible connections. The panel itself is of genuine Bakelite. Amplifier Panel is the same as the detector panel, with the addition of one California tone amplifying transformer. Detector Panel $4.00 Amplifier $9.00 MACHINE SCREW AND MISCELLANEOUS PARTS Nickeled contact points with nut, Small Bakelite knobs, 3-32 center.___ .05 each $0.05 Rheostats with 2 -inch dial and knob 1.50 Brass contact points, less nut, each____ .04 Alamo tube sockets 1.50 6-32 Hex brass nuts for contacts, Genuine Bakelite or Condensite Cele - per thousand 2.80 ron, per lb 2.00 No. 24 -Small Bakelite binding Hobbs 6 -volt, 60 -ampere battery posts, each .10 Raidiotron 5 -watt transmitting tubes 8.00 No. 26-Large Bakelite posts, each .125 23 -plate CW condenser transmitting 4.00 *G -Nickeled phone posts, each .05 Detector tubes 5.00 Large machined three -screw crystal Amplifier tubes 6.50 Amplifying cups, each .35 44 -plate vernier variable condenser 7.75 Panel Detector posts, wire, cross rod and 22 -plate vernier variable condenser, knob, as on Angeleno set, each .45 made by Reliance Co 6.25 Gilfillan Bros. Products for Radio in Grid leaks for variable front mount- 11 -plate plain variable condenser 2.25 ing .60 23 -plate plain variable condenser 2.50 Stock at All Times Grid condensers .30 43 -plate plain variable condenser 3.50 Phone condensers .60 63 -plate plain variable condenser 6.75 Glass enclosed detector stands 1.50 63 -plate vernier variable condenser__ 9.50 Switch Lever and knob assembly .40 Two-inch Bakelite dial and knob .60 Panel Engraving to your own speci- Levers for switches, 1 -inch radius .06 Three-inch Bakelite dial and knob__._ 1.00 fications, 5c per letter, and up. Marconi type Bakelite knobs, 1 -inch diameter .20 (We pay the postage) California Radio Company 331 NEW HIGH STREET, LOS ANGELES, CALIFORNIA Dealers and Jobbers Communicate for Territory Page 160 Radio Journal August, 1922

Schedule of Broadcasting Stations "On The Air), of the Western States THIS SCHEDULE SUBJECT TO CHANGE

Station Schedule Feature Wave Length ABERDEEN, WASHINGTON No. Coast Prod. Co. (KNT) 360 BAKERSFIELD, CALIFORNIA Bakersfield Californian (KYI) F. E. Siefert (KDZB) 360 360 BELLINGHAM, WASHINGTON Bellingham Pub. Co. (KDZR) 360 BERKELEY, CALIFORNIA Hotel Claremont-Maxwell Sunday, 1-2 P.M. Concert 360 Elec. Co. (KRE) Sunday, 6-7 P.M. Concert CENTRALIA, WASHINGTON E. A. Hollingsworth News, Concert 360 DALLAS, TEXAS Police Dept. (WRR) Sunday, 11 A.M.-7:30 P.M. Sermon 450 Daily, 7 P.M. -8:30-9:30 P.M. Weather Reports, News DENVER, COLORADO Y. M. C. A. Daily, 10 P.M. Weather Reports, News Fitzsimmons Hospital Thursday, 8-9:30 P.M. Concert Reynolds Radio Co., Inc. (KIZ) Daily, 8:30 A.M. Weather Reports 360 Sunday, 8-10 P. M. Concert EL MONTE, CALIFORNIA Coast Radio Co. (KUY) Daily, 4-4:30 P.M. News, Concert 360 Thursday, 9-10 P.M. News, Concert EUREKA, CALIFORNIA T. W. Smith (KNI) 360 FRESNO, CALIFORNIA San Joaquin Light & Power Co. News, Concert (KMJ) 360 Evening Herald (KDZH) News, Concert 360 GLENDALE, CALIFORNIA Glendale Press (KFAC) Monday, 3-3:15 P.M. News, Concert 360 Monday, 8-9 P. M. News, Concert Wednesday, 3-3:15 P.M. News Thursday, 8-9 P.M. News, Concert Friday, 3-3:15 P.M. News Saturday, 7-8 P.M. News, Concert GRIDLEY, CALIFORNIA Precision Shop (KFU) Sunday, 3-4 P.M. Concert 360 Monday, 8-9 P.M. Concert Thursday, 8-9 P.M. Concert HOOD RIVER, OREGON Blue Diamond Elec. Co. (KQP) 360 KLAM.ATH FALLS, OREGON Herald Pub. Co. (KDYU) News, Concert 360 LACEY, WASHINGTON St. Martin's College (KGY) 360 LONG BEACH, CALIFORNIA Prest and Dean Radio Lab. (KSS) Monday, 4-5 P.M. News, Concert 360 Tuesday, 4-5 P.M. News, Concert Wednesday, 4-5 P.M. News, Concert Thursday, 4-5 P.M. News, Concert Friday, 4-5 P.M. News, Concert Saturday, 4-5 P,M. News, Concert Saturday, 7-8 P.M. News, Concert LOS ALTOS, CALIFORNIA Colin B. Kennedy (KLP) Sunday, 4-5 P.M. Concert 360 Monday, 7:30-8:30 P.M. Concert Thursday, 8:30-9 P.M. Concert August, 1922 Radio Journal Page 161

Station Schedule Feature Wave Length LOS ANGELES, CALIFORNIA A. Hamburger & Sons, Inc. (KYJ) Monday, 5-6 P.M. Concert, Lecture 360 (Operated by Leo J. Tuesday, 8-9 P.M. Concert Meyberg Co.) Wednesday, 5-6 P.M. News, Concert Friday, 5-6 P.M. Concert, Lecture Friday, 8-9 P.M. Concert Saturday, 5-6 P.M. Concert, Lecture Kierulff & Co. (KHJ) Daily (Except Sat.), 1-1:45 P.M. News, Concert 360 (Operated in conjunction with Daily, 7:15-8 P.M. News, Concert L. A. Times) Sunday, 10-10:45 P.M. Sermon, Music Los Angeles Examiner (KWH) Daily, 1-1:15 P.M. Market Reports 485 Monday, 12:45-1 P.M. News, Concert 360 Monday, 6-7 P.M. News, Concert Monday, 7-7:15 P.M. Weather Reports 485 Tuesday, 12:30-1 P.M. News, Concert 360 Tuesday, 5-6 P.M. News, Concert Tuesday, 6-6:15 P.M. Weather Reports 485 Wednesdaÿ, 12:30-1 P.M. News, Concert 360 Wednesday, 6-6:15 P.M. Weather Reports 485 Wednesday, 8-9 P.M. News, Concert 360 Thursday, 12:30-1 P.M. News, Concert Thursday, 5-6 P.M. News, Concert Thursday, 6-6:15 P.M. Weather Reports 485 Friday, 12:30-1 P.M. News, Concert 360 Friday, 6-6:15 P.M. Weather Reports 485 Saturday, 8-10 P.M. Dance Music 360 Sunday, 7-8 P.M. News, Concert California Theatre (KNX) Daily (except Sat.), 2:15-3 P.M. Concert 360 (Operated by .Elec. Lighting Monday, 8-9 P.M. Concert Supply Co.) Saturday, 7-8 P.M. Concert Western Radio Elec. Co. (KOG) Daily, 12:30-1 P.M. Market Reports 485 (Operated in conjunction with Daily (except Sat.), 12-12:30 P.M. News, Concert 360 the Los Angeles Herald) Daily, 4:30-5 P.M. News, Concert Monday, 9-10 P.M. News, Concert Wednesday, 9-10 P.M. News, Concert Thursday, 8-9 P.M. News, Concert Saturday, 12:30-1 P.M. Market Reports 485 Earl C. Anthony, (KFI) Daily, 1:45-2:15 P.M. News, Concert 360 (Operated in conjunction with Tuesday, 9-10 P.M. Dance Music the Los Angeles Examiner) Wednesday, 6-7 P.M. Concert Friday, 9-10 P.M. Dance Music Saturday, 6-7 P.M. News, Concert Sunday, 10 :45-11 :30 A.M. Sermon, Music Sunday, 4-5 P.M. News, Concert' Sundaÿ, 7-9 P.M. Dance Music 510 Barker Bros. (KJC) Monday, 4-4:30 P.M. Concert, Education 360 (Operated by Standard Tuesday, 6-7 P.M. Concert, Education Radio Co.) Wednesday, 4-4:30 P.M. Concert, Education Thursday, 3 :45-4 :30 P.M. Concert, Education Friday, 6-7 P.M. Concert, Education Sunday, 5-6 P.M. Concert City Dye Works (KUS) Daily (except Sat.), 7-7:15 P.M. Concert, Lecture 360 Tuesday, 3-4 P.M. Concert Thursday, 3-3:45 P.M. Concert, Lecture Saturday, 3-4 P.M. Concert, Lecture Bullock's Dept. Store (KNN) Monday, 3-4 P.M. Concert, Education 360 Tuesday, 10-10:30 A.M. Concert, Education Thursday, 10-10:30 A.M. Concert, Education Friday, 10-10:30 A.M. Concert, Education Friday, 3-4 P.M. Concert, Education Bible Institute (KJS) Sunday, 11:30-12:30 P.M. Sermon 360 Sunday, 8-9 P.M. Sermon Thursday, 6-7 P.M. Sermon Beacon Light Co. (KNR) 360 Co. (KNV) 360 Radio Supply 360 Braun Corp. (KXS) 360 Irving S. Cooper (KZI) Mfg. Co. (KZC) 360 Western Radio 360 A. A. Kluge (KQL) Elec. Lighting Sup. Co. (KGC) 360 Elec. Co. (KDZP) 360 Newbery 360 W. R. Mitchell (KDZD) Auto Club of So. Calif. (KDZF) 360 MEXICO CITY, MEXICO (XDA) Daily, 7-7:30 P.M. News. 3500 Daily, 10 P.M. News 5300 MODESTO, CALIFORNIA Modesto Evening News (KOQ) News, Concert 360 Herald Pub. Co. (KXD) News, Concert 360 MONTEREY, CALIFORNIA Concert 360 Noggle Elec. Works (KLN) News, Page 162 Radio Journal -- August, 1922 Station Schedule Feature Wave Length OAKLAND, CALIFORNIA Warner Bros. (KLS) Daily, 12-1 P.M. Concert 3h0 Sunday, 12:15-1 P.M. Concert Saturday, 7:30-8:15 P.M. Concert Rock Ridge, & Pacific Daily, 3:30-4:30 Atlantic P.M. Concert 'I Radio Supply Co. (KZY) Daily, 6:45-7 P.M. News Sunday, 11-12:15 P.M. Concert Sunday, 3-4 P.M. Concert Wednesday, 7:30-8:15 P.M . Concert Saturday, 8:15-9 P.M. Concert Hotel Oakland, Daily, 7:15-7:30 P.M. News 360 Preston D. Allen (KZM) Tuesday, 7:30-8:15 P.M. Concert Friday, 8:15-9 P.M. Concert OGDEN, UTAH Rocky Mountain Radio Corp. News, Concert (KDZL) 360 PASADENA, CALIFORNIA J. J. Dunn & Co. (KLB) Tuesday, 8-9 P.M. Concert 360 Friday, 8-9 P.M. Concert Sunday, 3-4 P.M. Concert Sunday, 7-8 P.M. Concert '\ltadena Radio Lab. (KGO) Monday, 5-6 P.M. Concert 360 Tuesday, 5-6 P.M. Concert Wednesday, 5-6 P.M. Concert Thursday, 8-9 P.M. Concert Friday, 5-6 P.M. Concert Saturday, 8-9 P.M. Concert PHOENIX, ARIZONA Smith, Hughes & Co. (KDYW) News, Concert 360 POMONA, CALIFORNIA Pomona Fixture & Wiring Co. News, Concert 360 (KG -F) PORTLAND, OREGON Halleck & Watkins (KGG) Daily, 4:30-6 P.M. News, Concert 360 :Monday, 7-7:30 P.M. Concert Tuesday, 7:30-8 P.M. Concert Wednesday, 7:30-8 P.M. Concert Thursday, 7:30-8 P.M. Concert Friday, 7:30-8 P.M. Concert Saturday, 7:30-8 P.M. Concert Saturday, 9-10 P.M. Concert Northwestern Radio Mfg. Co. Daily, 12-1 P.M. Concert 3(0 (KGN) Daily, 2:30-3:30 P.M. Concert Tuesday, 7-8 P.M. Concert Wednesday, 7-8 P.M. Concert Thursday, 7-8 P.M. Concert Friday, 7-8 P.M. Concert Saturay, 7-8 P.M. Concert Tuesday, 8-9 P.M. Concert Sunday, 9-10 P.M. Concert, Education Monday, 9-10 P.M. Concert, Education Friday, 9-10 P.M. Concert, Education The Oregonian (KGW) Daily, 3:30-4:30 P.M. News, Concert 360 (Operated by Ship Owners' Monday, 7:30-8:30 P.M. News, Concert Radio Service) Wednesday, 8-10 P.M. News, Concert Friday, 8-9 P.M. Concert Sunday, 7-8 P.M. Concert Willard P. Hawley Jr. (KYG) Tuesday, 9-10 P.M. News, Concert 360 Wednesday, 9-10 P.M. News, Concert Saturday, 8-9 P.M. News, Concert Stubbs Elec. Co. (KQY) Daily, 1-2 P.M. Concert 360 Daily. 6-7 P.M. Concert REDWOOD CITY, CALIFORNIA Gt. West. Radio Corp. (KDYN) News, Concert 369 REEDLEY, CALIFORNIA Lindsay, Weatherill & Co. (KMC) 360 RENO, NEVADA University of Nevada (KOJ) 360 Nevada Mach. & Elect. Co. News, Concert 360 SACRAMENTO, CALIFORNIA Hobrecht (KVQ) Daily, 5:30-6:30 P.M. News, Concert 360 Sunday, 5-7 P.M. Concert Saturday, 8-9 P.M. Concert SALT LAKE CITY, UTAH Utah Telegram Pub. Co. (KDYL) News, Concert 360 The Deseret News (KZN) News, Concert 360 Cope & Cornwell Co. (KDZV) News, Concert 360 Page 163 August, 1922 Radio Journal --- L Station Schedule Feature Wave Length SAN DIEGO, CALIFORNIA Government Station (NPL) Daily, 5 A.M. News 9800 Southern Elec. Co. (KDPT) Daily, 7:30-8:15 P.M. News, Concert 360 (Operated in conjunction with S. D. Union & Tribune) Holzwasser's Dept. Store (KON) Daily, 8:15-9 P.M. News, Concert 360 (Operated in conjunction with S. D. Sun) The Radio Shop, Savoy Hotel) News, Concert 360 (KDYM) Carlson & Simpson (KDYO) 360 Holzwasser Co. (KOPT) 360 Theater Music Co. (KYT) 360 SAN FRANCISCO, CALIFORNIA Fairmont Hotel (KDN) Daily, 11-12 M. Time, Concert 360 (Operated by Leo J. Daily, 1-2 P.M. Concert Meyberg Co.) Daily, 4:30-5:30 P.M. Concert Daily, 7-7:15 P.M. News, Concert Sunday, 10-11 A.M. Concert Monday, 8:30-9 P.M. Concert Thursday, 7:30-8:30 P.M. Concert San Francisco Examiner (KUO) Daily, 5:30-6:45 P.M. News, Concert 360 Sunday, 2-3 P.M. Concert Lorden's (KDG) Concert 360 The Emporium (KSL) Daily, 10-11 A.M. Concert 360 Daily, 3-3:30 P.M. Concert Sunday, 5-6 P.M. Concert Radio Telephond Shop (KYY) Concert 360 Hale Bros., Inc. (KPO) Daily, 9-10 A.M. Concert 360 Presidio (AGI) Sunday, 7-9 P.M. News and Instruction 360 Government Station (NPG) Daily, 1:15 A.M. News 600 Government Station (NFG) Daily, 12 Midnight News 4000 SAN JOSE, CALIFORNIA Herrold Lab. (KQW) Sunday, 5-6 P.M. Concert 360 Wednesday, 8:15-9 P.M. Concert O. A. Hale &'Co. (KSC) Daily, 3-4 P.M. Concert 360 SEATTLE, WASHINGTON Post Intelligencer (KFC) News, Concert 360 Northwest Radio Service Co. Daily, 8-9 P.M. News, Concert 360 (KJR) Wasmer's (KHQ) News, Concert 360 First Presbyterian Church Music 360 (KTW) Northern Radio Elect. Co. (KTC) 360 The Rhodes Co. (KDZE) Concert 360 SPOKANE, WASHINGTON Doer -Mitchell Elec. Co. (KFZ) Concert 360 Spokane Chronicle (KOE) News, Concert 360 STOCKTON, CALIFORNIA C. O. Gould (KJQ) Daily, 5-5:30 P.M. News, Concert 360 Sunday, 10-11 A.M. Concert Sunday, 7-8 P.M. Concert Wednesday, 7-8 P.M Concert Portable Wireless Tel Co. (KWG )Daily, 4-5 P.M. News, Concert 360 Sunday, 2-3 P.M. Concert Tuesday, 8-9 P.M. Concert Friday, 8-9 P.M. Concert SUNNYVALE, CALIFORNIA The Radio Shop (KJJ) Tuesday, 8:15-9 P.M. Concert 360 Friday, 7:30-8:15 P.M. Concert TACOMA, WASHINGTON Mullins Lice. Co. (KGB) News, Concert 360 Love Elec. Co. (KMO) 360 TUCSON, ARIZONA Ariz. Daily Star (KDZA) News, Concert 360 WENATCHEE, WASHINGTON Eke. Supply Co. (KDZi News, Concert 360 YAKIMA, WASHINGTON Foster -Bradbury Radio Shop News, Concert 360 (KFV) Elec. Power & Appliance Co. News, Concert 360 (KQT) Page 164 Radio Journal August, 1922 An Artistic Home Recei-\)ing Set 139 C. H. DILLINGER

The feminine touch of symmetry and beauty is already apparent in the devel- opment of Radio. Take this Basket Radio Receiving Set, for instance. It is an indication that Rado sets will soon be built with an eye to beauty as well as utility. Lady, you are welcome.

When we think back to the early in the afternoon when she is resting. The accompanying drawing The explains days of the phonograph-not even the radio receiving set thus becomes itself as to the hook-up and the form early days, in fact, but a compara- a part of the home, as the piano or in which it is constructed. The panel tively few years ago-we recall the phonograph has done, and this is one in this set has been made of three-ply reason-and an important time before the finished cabinet made one-why veneer wood usually used for drawer the appearance of the set should con- bottoms. This has the phonograph a thing of beauty and been painted with form to the requirements of artistic a coat of black enamel and shellaced a joy forever. It is only within very beauty. It should at least not be of- to give it the appearance of the com- recent years that the manufacturers fensive to the eye. Giving so much of mercial patented rubber panels, and have seen the possibilities of the ar- DOTTED UNES CAT WHISHER tistic line and form of early Venetian, SHOW POSITION SWITCH TO OF COIL CRYSTAL. 9 SINGLE TURN Italian and Flemish chests, and have TAPS borrowed from these for cabinets for SWITCH TO F'AfiE1 10 TURN the instrument. TAPS SUPPORT FOR COIL This is true of the radio receiving set today. It is in its unfinished state, COIL artistically. At its best it is suggestive of the electro -therapy cabinet more than of anything else. The home- made sets are even less distinctive. Certainly none of the sets we have at the present time can be said to add artistic beauty to the home. Along with the mechanical and tech- PHONE PHONE GROUND PFR!AI nical developments in radio there nat- PHONE WOOD rRONT PIECE CONNECTING poNDENSER FROM PANEL TO urally will follow improvements in the WIRES BOTTOM OF BASKET appearance of the cabinets containing the receiving apparatus, and it would VIEW SHOWING BACK OF PANEL SIDE VIEW seem that since it is the woman in the home who has most to do with the pleasure, its appearance should also also to receiving set, it im- add to the beauty of the should bear the contribute to the joy of its possession. set. print of her personality. The man of The coil tube, three inches in With this idea in mind I built a re- diameter, has been wound with No. 27 the family listens in only after busi- ceiving set to fit in of the sewing basket single cotton covered magnet wire and ness,-in the two or three hours illustrated, using half the basket shellaced leisure he has dinner. The for to hold in place. The con- that after the set, and leaving the balance of the nections have woman listens throughout the day at all been -made with the space to hold the head -set. It is never ordinary bell many odd moments, and particularly wire, with the exception obtrusive, no matter where it is placed, of the wires from the coil to the con- but lends itself to the other furnish- tact points which are loops of the coil ings. The space chosen for it is wire made while winding. The first against a wall panel between a door switch, to which the aerial wire is and the window where the lead-in connected, has access to the single wires come through. A small groove turn taps. of which there are nine. has been drilled in the window ledge The second switch has access to the which allows the wires to remain con- ten turn taps. The combination of nected with the window closed and these switches affords close tuning. locked, and the set is ready to be put The aerial wire is of No. 14 bare cop- to use merely with the removal of the per and has been erected in a V shape lid and the adjustment of the head- each strand about fifty feet in length, phones. When it is desired to listen the lead-in coming from the center of in on the porch the basket is carried the wire (at the point of the V). This outside and the wires are brought was erected in this way merely for through the window and again con- convenience, and the set should work MILADY'S BASKET RADIO nected. The basket is sufficiently equally as well, on another aerial. A roomy to allow ample space not only good pair of 2200 ohm phones are be- A UNIQUE IDEA TASTEFULLY CARRIED for the head-set, but for the broad- ing used. OUT. A RADIO SET IN AN ARTISTIC casting schedule, a copy of the Con- Tht owner of this set has reported BASKET WILL BE AN ORNAMENT IN tinental Morse code, and a pad and favorably on the results, stating that ANY HOME AS WELL AS AFFORDING pencil for use when its owner is in- all local ' broadcasting and even close - THE MEANS FOR TH.E HOUSEWIFE TO spired to get a little practice copying in out of town stations have been "LISTEN -IN" TO HER HEART'S CONTENT. code. heard clearly and audibly. August, 1922 Radio Journal Page 165

FITZGERALD'S For the Advancement of Music

cAnnouncinc9 the complete

052Y-k -v Radio Equipment

Ever alert to keep abreast with the latest developments, we have secured the agency rights for the distinguished DeForest line of Radio Equipment for the Western States. Our territory in- cludes, in addition to California Washington Nevada Wyoming Oregon Utah Idaho Arizona Montana New Mexico In addition to this superior line, we are prepared to equip fully all amateur and commercial stations from our complete retail Division. We handle the celebrated Philadelphia Diamond Grid Storage Batteries.

All communications with regard to agencies or mail orders for parts and requests for catalogues will re- ceive prompt attention if addressed to THE RADIO DIVISION

elITZGERALD MUSIC C;ON HILL STREET AT 727-729 LOS ANGELES CALIFORNIA Page 166 r-- Radio Journal August, 1922

A Nc++, EVEREADY 'B' BATTERY

No. 767 Made up of thirty large cells ar- ranged in five rows of six cells each, gives 45 volts and is equipped with Fahnestock Spring Clips, allowing the following voltages: 16%i 18, 19%, 21, 22% and 45 volts. This is a remarkably high quality, long life battery. Dimensions: Length, 81.E inches; width, 63% inches; height, 312 inches over all. Weight, 9 lbs. Price $5.50. Two important characteris- tics are necessary for a satis- factory "B" battery: first, the battery must be designed for long life; second, the operation must be noiseless. The Eveready "B" Battery meets these exacting require- ments. EYEREADY 'A' Radio Batteries are carried in stock by the best radio dealers in three different types-60, 80 and 100 ampere hour capacity. These Eveready Photo by Intcr, ational Newsreel "A" Batteries have a large THE MOST POWERFUL RADIO TUBE EVER MADE capacity and give longer serv- DR. IRVING LANGMUIR, ASSISTANT DIRECTOR OF THE RESEARCH LABORATORY ice and require less frequent re- OF THE GENERAL ELECTRIC COMPANY PLANT AT SCHENECTADY, N. Y., INSPECTING charge than most other batteries ONE OF THE NEW 20 KILOWATT RADIO TUBES, THE MOST POWERFUL EVER MADE. of this type. THIS IS THE TUBE WHICH MARCONI PREDICTS WILL REVOLUTIONIZE RADIO BY REPLACING THE GIGANTIC ALTERNATORS NOW USED IN TRANSOCEANIC COMMU- Made on the Pacific Coast by NICATION. IT IS FIVE TIMES LARGER THAN ANY THAT MARCONI IS AT PRESENT the world's largest battery man- USING IN HIS EUROPEAN STATIONS. IN HIS RIGHT HAND DR. LANGMUIR IS ufacturers. SHOWN HOLDING ONE OF THE 201 RADIOTRONS, THE TUBE SO WELL KNOWN TO AMATEURS, WHICH SEEMS SO PUNY IN COMPARISON TO THE LARGER AND MORE POWERFUL TUBE.

National A lad of nineteen years, incapaci- ment of the officers at headquarters in tated by an accident, got his first their spare moments. It is also anti- "kick" out of life for many dreary cipated that it will prove to be a prac- Carbon Co. months when he listened in on a new tical adjunct to their police business Incorporated receiving set, the gift of a friend. A in receiving clews and running down local broadcasting station opened its criminals. A wire L flat top aerial 599 Eighth Street program with a cheerful hail to him, eighteen feet high has been erected on San Francisco, Cal. calling him by name. top of the Santa Monica City Hall, * * * with detector and two -stop amplifiers. 419 East Second Street Two of the motorcycle members of A magnavox is in use »so that the loud Los Angeles, Cal. Santa Monica's police force have in- speaking can be heard at a distance stalled equipment for the entertain- without the use of earphones. Page 167 August, 1922 Radio Journal r --T teur transmitters, and I desire to im- one for which you are adjusted, you Major Dillon on press you with the importance of will know that the tuning of your re- having your stations adjusted accu- ceiver is broader than it should be, Interference rately to 200 meters or under with a and hence the interference noticed is you will all give due to that cause. -in on KHJ, the Times very sharp wave. If Listeners I for those station, recently heard this matter your careful attention "There is relief in sight broadcasting there will be no just is being interfered the voice of Maj. J. F. Dillon, radio am sure that whose reception cause for complaint. with, for there is a bill now before inspector of the sixth radio district, be radio "To the citizens who are listening Congress which is expected to who sought to bring home to and which why they find to the broadcasting station I desire to passed within a few weeks, fans the real reasons separate wave length interference, and commended all for say that interference is more often the will provide a fault of receiving sets than of broad for all broadcasting stations. You their courteous co-operation. class to wave -tuned transmitters, and if you will then be able to receive any "I am glad of this opportunity may desire, said Maj. Dillon, "and are not able to tune out a station of entertainment that you talk with you," for the various waves congratulate you all upon the ex- transmitting from a considerable dis- by adjusting to be assigned." cellent manner in which you have co- tance on a wave differing from the which are to operated in the conduct of your sta- tions in this zone. "Some of you may have the impres- sion that your interests are being over- looked in the recent rush of broad- casting. However, such is not the case for the Secretary of Commerce is himself an ardent amateur, and hence you may be sure that your interests are perfectly safe in his hands. Sft4olojie "I am receiving a number of com- plaints regarding interference with the reception of broadcast matter by ama - rypewt'ifeY

Here It Is! STEVENS Radio Panel WINDOW Patent Pending The one thing neces- sary to complete your panel Actual Size Twenty years ago, the typewriter was blind. Then IT'S THE FINISHING TOUCH Ventilates the cabinet and keeps out dust came visible writing-a much -needed improvement. and insects. Black or Nickel Finish. And now, today, the Noiseless Typewriter-as great Price $1.00 At your dealers or by mail. DEALERS-Write for prices on this fast - an invention as the typewriter itself. selling accessory. Stevens Makers of Radio Accessories In a single sentence you can sum up the basic engi- 434 60TH ST., OAKLAND, CALIF. neering principle behind this latest gift of science to the American business man and his stenographer- "The Noiseless prints by pressure and not by blow." Throw Away The Noiseless prevents the effect by removing the Your Galena cause. The type is steel-the roller is steel-and yet there is no noise. The Noiseless refuses to make Nature end Science hale at Last a noise. There is no need, therefore, for mufflers, Produced the Perfect soft rollers, felt pads or so-called shock absorbers. The noise is not created. Detector Greater speed, lighter touch, increased durability and The Rare Mineral Crystal better work have resulted from the elimination of hammer -blow wear and tear. Radio Argentite Where typewriters are needed noise has no place Guaranteed to be the most highly efficient detector obtainable. Lasts indefinitely Mounted peeeiter ready for use Ilçiseless in nickeled cup, Price, $1.00 DISTRIBUTPI COMPANY Mail Orders Solicited. Money Refunded if not Satisfactory) 17 Second St., San Francisco 815 Broadway Central Bldg., Los Angeles GILMOR-LAYNE 81 Fourth St., Portland Distributors 314 Maritime Bldg., Seattle 203 L. A. Rail-97ay Building 1754 Champa St., Denver Los Angeles, Calif. Page 168 Radio Journal --r r --s August, 1922 Broadcasting Technique

A series of interviews with expert listeners to broadcasting develops a MOTORADIO is a compat, variety of expressions of opinion, and portable radio receiving set of one of them at least is of interest in the utmost simplicity but of the these times of change and of effort highest quality. It employs the Arm- toward better quality. strong regenerative circuit having It has to do with the results of fixed antenna condenser of two echo suppression. Our broadcasters different values and variometer in some cases have resorted to exten- for sive use of drapery for tuning Two stage audio frequency this purpose, and have been very successful in such Joroo. amplifier, having jack for detector suppression. In so doing, however, and for second stage of amplification. they have taken away fe.94.G.G..ee an indefinable e.a,.. Range 150 to 600 meters. something that makes for lifelikeness, and Ideal for there is a strong feeling that the automobile or home use. We believe this to be the best cure may have been over -applied. mechanically constructed and finished set on the market. When one comes to think of it Attractive discounts to dealers. Immediate delivery. critically, it becomes apparent that RADIO DIVISION in one's usual experience he hears mighty little speech in which there is an entire absence of reflection. From PboA942. infancy we hear speech within four e.o,+1,. walls, and it is seldom that those walls 820 West Seventh Street Los Angeles, California are as fully draped as at many present- .- gem ,-.. day - .-'.-.- --- -_ T ... broadcasting stations. Most lec- tures, sermons, plays and concerts are given in places where there is echo- sometimes a lot of it, but always some. It is only natural, therefore, that one should feel a positive sense; of un- RADIO SERVICE CO. reality in the reception of radio Con- certs and addresses from rooms 337 So. Western Ave; wherein the echo has been largely or LOS ANGELES, CALIF. wholly suppressed. A good way to test the differences between the usual and the ultra- Manufacturers of Radio Supplies and modern forms of broadcasting in this regard is to tune quickly, from one to the other of a simultaneòus Sunday Equipment forenoon sermon and concert, if there is such a pair of events in your neigh- borhood. The sermon is almost sure to provide the usual set of church echoes, while the concert', if from a Headphones and Materials regularly equipped broadcasting stu- dio, will be free from them in a con- For Making Your Own siderable degree. If your reaction to the experience is that of many persons we have interviewed, we suppose you Radio Receiving Sets will agree with us that there is room for further thought and experiment in Stromberg -Carlson Headphones - Kellogg Headphones - Everett Headphones this as in so many other details of the Antennae Wire No. 14 Copper fascinating art. An 4oc a pound. In lots of 5 lbs. or more, 35c a pound adjustable set of screens giving full variation from minimum damping Variocouplers Amplifying Transformers Knobs (full normal wall -echo) to maximum Tuning Coils Plate Condensers Insulators damping (the most the fabric can Tested Galena Magnet Enamel Wire Contacts give) can be had by the use of narrow Binding Posts Cotton Covered Wire Slides panels of fabric on frames pivoted after the manner of Venetian blinds. ---and Radio Outfits Complete When these panels are inclined edge- Our Location at 649 So. Main in the same block v.)ith the Pacific Electric Station wise to the performer the echo from makes our store especially accessible to commuters. that particular portion of wall is at its most. Another effective rig is that using J. M. Kennedy cord portieres instead of fabric, the cords lending themselves readily to the 647 South Main St. breaking up of the wall space into bare areas of any shape and size. August, 1922 Radio Journal Page 169

knows ?-they may yet be able to "lis- New York City, together with the pur- Lizzie Listens In ten in" on the entertainments broad- chase of, many portable receiving sta- Time was when, to paraphrase a cast from the Land of the Cherry tions which may be set up in parks poet anent a certain primrose, Blossoms. and public places. All important or- * * * ders and directions of the fire, police An auto in a garage dim The September issue will contain and health departments will be broad- A simple auto was to him, an article by Mr. Lex B. Benjamin cast from the municipal station. Con- And it was nothing more, on "How to Build an Audion Set" certs will also be supplied. that is a winner. (Both the article * * * but in point of progress that state of and the set.) Excellent hookups will In the Wyandotte county j ail, Kan- mind which we all had respecting our enable you to build this set. sas, the prisoners want to "listen in" automobiles is in the dark, unenlight- * * * on the radio concerts broadcasted in ened past. Today our tin Lizzies, An approapriation of fifty thousand their vicinity. They have started a Raws-Oysters a n d Fierce -Marrows dollars has been allowed for the in- fund with their "tobacco money" with have become potential auditoriums stallation of a municipal broadcasting which to purchase a receiving set with at our ease and wherein we may sit on top of the Municipal Building in a loud speaker. absorb all the music, lectures 'and what -not let loose on the defenseless air.' And all because a mere man or two "didn't know it couldn't be done, Constant, steady voltage and went ahead and done it"-fixed No battery noise in your V. T. up a little box wherein a sound wave Easily recharged at home They're might wander and get caught. A life of from 3 to 5 years putting them on automobiles now, so Jelly electrolyte, no spillage that when you take the kids for a pic- Clip on for any required voltage nic into the great .Out -doors, and you get tired of hand ball and foot races, you can connect up with Riley's band a few of the reasons why and have a dance or two under the trees. Or you can turn on something creepy and dreamy when you have Snell Cells your girl out in the moonlight-a "you -find -the -girl, we'll -do - the - rest" 22 volt, 11 cells $ 5.50 proposition. Storage B' Battery 44 volt, 22 cells 10.00 It is a simple matter to place the Chemical rectifier 1.25 equipment on your car. For an aerial should be on your set. F.O.B. San Francisco. a bare copper wire No. 14 is laid in An increase in prices will take letter U about the top effect on August .15th the shape of the At your Radio Dealer or of the car. The fabric of the top acts as insulation. A wire soldered to the frame provides a ground. The ground wire and aerial lead wire are connect- Mann &z. Snell which is ed to a crystal reeciving set 4733 Geary Street 6BQL San Francisco, Cal. between the two front seats. Another method of making the aerial is to make a cross of two boards four feet long and one by six inches, with eight winds of bare copper wire around the cir- cumfere,nce, insulated at the corners. An automobile receiving set will re- quire at least two stages of aìnplifica- Never a Better Time tion in conjunction with an audion de- tector. Such a system would have a To Visit One of America's range of from 5 to 20 miles. Most Famous Mountains Colorado is planning to have a com- prehensive system of radio communi- cation which is now being evolved by police and military authorities. LOWS the MT. Every sheriff's office is to be equipped to listen in under a regularly timed Delightful at All Seasons schedule and word of escaping crimi- The Pleasant Odor of Woods, the Clear, nals or fugitives from justice will be Distant Vistas, the Pleasant, Winding broadcast to ensnare the malefactors. * * * Trails, Insure a Glorious Outing. of Los Angeles have The Japanese ¡1 succumbed to the radio enthusiasm, ROUND TRIP 5 0 and the publisher of the Japanese FROM LOS ANGELES L' Daily News has applied for a broad- casting license to operate from his newspaper office. In the Japanese Railway quarter many homes are being Pacific Electric equipped with receiving stations. Who Page 170 Radio Journal August, 1922 ROMANCE OF RADIO on extensive experiments, using two (Continued from Page 135) closed wire circuits extending about 14 miles, each stretched on telegraph In 1882 when the telegraph cable poles parallel to the shores of the The Perfect between the Isle of Wight and Severn River between Gloucester and Southampton broke down, Romance Bristol. Upon continuous pressure Condenser jogged his elbow and aroused him to upon the transmitting key a continu- ous sound was heard Designed and manufactured by the opportunity thus presented to through the tele- an expert phone receiver across the river, about Electrical Engineer, Mr. demonstrate wireless signalling be- R. W. W. Grigsby. tween these two points. He used the five miles. On Newcastle -on -Tyne Morse code, and the signals were telephonic speech was conveyed over heard clearly. The cable was repaired a distance of a quarter of a mile with- the following day,-which was indica- out connecting wires. tive of efficiency, although it ended It was in this year, 1885, any further need for that experiment,- Edison in America invented a wireless and he therefore discontinued his telephone system for work. use between Two years later he carried moving trains by means of induction, utilizing the ordinary telegraph wires for one inductive circuit, and equip- ping the train with another. The sys- tem was utilized successfully in 1887 on the Lehigh Valley Railroad, but never became an indispensable factor in passenger convenience. Plates that are = -gy(rA absolutely i t 1m/i, In the meantime Clerk -Maxwell's c-1 straight L u - and will never warp are ' theory had intrigued a young German made by a patented process. scientist, Henrich Rudolf Hertz, who The most critical radio expert r in 1883 was a privat docent at Kiel. t; will find nothing to improve or In. 1888, when but thirty years of age, add. he was professor of physics in the University of Bonn where his nu- Ready to connect up and use. merous experiments which were un- Adjustable tension on the plates ..., dertaken at the suggestion of the prevents binding or slipping. Sol- f dering famous German physicist, von Holm- clips and binding posts. holtz, were epoch-making. These pro- Spiral copper spring soldered to vided the basis of radio -telegraphy and rotary shaft. Insulated stop for Reliable radio -telephony, although none of his rotary plates. brilliant contemporaries dreamed this. Prices no higher than for in- However, inasmuch as he did not ferior condensers. Radio succeed with his apparatus in pro- 23 plate Unbalanced $3.75 ducing waves of any remarkable 43 plate Unbalanced 5.00 length, it was perhaps but natural for 23 plate Balanced 7.00 Service him to believe that the transmission of 43 plate messages Balanced 9.50 Howland with these waves as a ve- & Dewey Co., long hicle of sound, was impracticable. He known in Southern California stopped just a thought too for. for the dependability short of its Romance. His vision not suffi- merchandise was and service, now ciently far-reaching to penetrate the has a complete Radio Depart- gray fog of the future, massed as it ment under the direction of a was destined to be, with inventions of licensed operator. men of brilliant minds, indomitable Complete Receiving Sets, Head patience, and untrammelled faith. Sets, and a full line of parts, How Romance must have blushed for all of reputable make, are sold him yvhen a civil engineer of Munich under the guarantee of asked him if he considered that elec- tric waves could be utilized in tele- phonic communication, and he replied No retail orders filled except by in the negative ! mail. Romance was all but shouldered out Immediate delivery. Postage of the way by Hertz who was about prepaid. to give up his experiments as barren Send money order or stamps. of definite results when an accident Write for our prices on all other involving the unpremediated proximity equipment. Discounts to of two coils directed his attention to dealers. the phenomenon of sparks occurring in the second coil simultaneously with Sole Distributors EASTMAN KODAK CO. an electric discharge in the first. This was the same phenomenon that 510 S. BROADWAY Hughes had observed, but whereas Lloyd Electric Co., Inc. Hughes failed to relate it with the 947 South Figueroa St., Los Angeles, Calif. Clerk -Maxwell theory of electromag- Los Angeles, Calif. netic waves, Hertz immediately made August, 1922 Radio Journal ---7 Page 171

the connection, and plunged anew into of the scientists and inventors were Nicola Tesla believes that the me- his experiments. soon turned to flow in the same chan- chanical modus operandi of the world To him belongs the glory of the dis- nel. Many improvements were made is destined to be radically changed covery of the progressive propagation in the apparatus which Hertz had used through the development of radio. He in his demonstration. Professor Rhigi of radioactivity throughout space, and is planning a power plant which will measured the length and of Bologna, instructor of the youthful he actually radio energy for commercial velocity of electro -magnetic waves and Marconi, was one of the enthusiasts, transmit proved their exact accordance with and M. E. Branly and Sir Oliver purposes. Gossip has it that the West- the waves of light and heat in so far Lodge and others stamped the seal of inghouse laboratories have already at as the transverse nature of their vi- their genius upon their inventions seen a dog carried a distance of forty this time. Rhigi used his own per- bration and their susceptibility to re feet by radio energy alone. and polarization are con- fected apparatus in making his experi- fraction * * * cerned. His experiments, conducted ments, and attained greater results, al- with exceedingly simple instruments, though he did not wholly bridge the Recently a program entirely by blind tended to prove the main contentions gap between theory and fact. entertainers was broadcasted to blind of Clerk -Maxwell's theory, notwith- (To be continued ex -service men at the Soldiers' Home standing that he succeeded in trans- in September Radio Journal) at Sawtelle. mitting impulses over but a few yards. He set forth in writing the results of in the two years be- these experiments E. Rogers tween 1887 and 1889, covering prac- Frank Creswell, Jr. Albert tically the whole field, and establishing the present laws of electric wave propagation. In his honor these elec- tro -magnetic waves have since been Western Radio Research known as "Hertziari waves." His ex- periments closed the discussion of theories, and to him undoubtedly re- Laboratories, Inc. of lighting the torch mains the credit Shop that kindles the world today with Successors to C. & R. Radio enthusiasm for the art of Radio 955 South Grand Ave. Telephony. Phone 823833 While Hertz was carrying on his astonishing experiments another man, A. W. Heaviside, not so conspicuous MANUFACTURERS of in the public eye, succeeded in estab- lishing telephonic speech communica- R ADIO APPARATUS tion between the upper ground and the galleries of the Broomhill Collieries three hundred and fifty feet below the Amplify Your Crystal surface, by laying above and below ground two complete metallic circuits TYPE 105-RADIO FREQUENCY parallel to each other, but with no con- C. & R. Quality necting wires. Two years after this Elihu Thompson suggested the use of electric waves for the transmission of signals through fogs and material ob- jects, but apparently failed to make any demonstration of his theory. At first the scientific world was not more greatly aroused to the practical importance of Hertz' revolutionary discovéry than it had been to the as- tonishing theory of Clerk -Maxwell. `r Its vision was dulled with so much scanning of theories that it could not at once see the transcendental pos- sibilities of the reality. Nevertheless there were exceptions to this' indiffer- ence among many serious students, one of whom was a scientist connected vith the College of the City of New York, Professor Ogden Doremus, who had followed Hertz' experiments with Studios in keen interest, and recognized their ultimate value to the world. He had one of Hertz' associates make for him All California Cities exact replicas of his apparatus, and ORPHEUM BUILDING these are now a part of the equipment of the City of New of the College 41 Grant Avenue 636 South Broadway York. San Francisco Los Angeles With the established knowledge of Hertzian waves, however, the minds i Page 172 r Radio Journal August, 1922 A wedding ceremony performed in corner, be sure that you provide your- "Stone walls do not a prison an airship was make" heard by spectators on self with a radio headpiece, because now that radio has arrived. The con- the ground by radio. your hostess intends that you shall victs' band in the * * * federal prison at At- "listen in" at her party. lanta was allowed recently to go un- When additional units are added the * * * der guard to a radio commercial station and there radio station at Port Jef- Radio is responsible for undoing the broadcast their music to the outside ferson, Long Island, will be the most work of many centuries. It has world. powerful radio station in the world. smashed to smithereens the mask of * * * After this comes the station built by stolidity which the ages have moulded The range of army radiophones is the United States at Lafayette, near on the face of the Chinaman. The three hundred Bordeaux, France, and sold miles ; that of radiotele- to France typical "poker face" went into the graph is a thousand afterwards. It operates on a wave discard miles. Longer when members of the Chinese distances make use of relay stations length of 23,000 meters, and sends ra- Nationalist Party Club of Los Angeles dio for the transmission of messages. messages over 4,000 miles. "listened in" on an entertainment pro- * * * * * * gram. Their smiles and expressions When an invitation is accompanied The Department of Commerce sug- of wonder were quite normal and gests with the letters "B. Y. O. H." in one human. that some relief might be ob- tained from so-called strays, static and atmospheric disturbances occurring in the summertime by using a coil anten- na instead of the usual elevated anten- na or by using ground antenna. UNIVERSAL * * * RADIO & Report has been made of the suc- cess of recent experiments in the wire- RESEARCH less transmission of pictures between CO. American and Italian battleships in Italian waters, through the assistance of a machine and process invented by ENGINEERING - MANUFACTURING a German, Dr. Korn, professor of Complete line of High Grade, Standard Makes, Radio Apparatus mathematical physics at the Technical High School, Berlin, and inventor of the "telautograph." .In several in- MYERS TUBES stances these were actual photographs, Unexcelled as radio frequency and audio frequency amplifiers and in another a facsimiled message from an Italian admiral, sent in his handwriting. * * * SERVICE, COURTESY, ACCURACY A restaurateur of Los Angeles pro- vides radio entertainment for his Our New Location is guests. * * * The National Radio Chamber of 199 So. Fair Oaks Ave. - Pasadena, California Commerce has been organized, with Alex. Eisemann president. Its purpose is to standardize radio products and regulate conditions in the radio indus- try. All manufacturers, large or small, are eligible for membership, after their apparatus has been passed Keystone on by the board. Concerns organized for stock jobbing purposes or which issue carelessly constructed merchan- Variable dise or which ignorantly or unscrupu- lously infringe on existing patents will be rigidly excluded. Condensers * * * Complaints that radio magazines at Are Convertible the Los Angeles Public Library are being cut up by radio enthusiasts and 13 Plate to 23 articles on the subject removed to 23 Plate to 43 other parts indicate the desire for in- Extra Plates 10c Each formation on radio is great. The Pub- Immediate Delivery lic Library has issued an appeal that the valuable and much sought after 24 -gauge copper. Greater capacity than any Condenser on the market. Great for experimenting radio magazines be preserved. 13 plate, .00025 M.F., $2. 23 plate .0005 M.F., $3 43 plate .001 M.F., $4.50 * * * Radio Sets on Time Payments Vario Couplers, silk, $4.00 Announcement is made that elimina- tion of the crackling and buzzing ac- companying radio signals, which have Keystone Radio Service Co. proved one of the greatest obstacles MANUFACTURERS OF RADIO SUPPLIES in the development of radio, has been 140 South Broadway 3ormagiä 9 Los Angeles, California accomplished by United States army experts. Radio Journal -- Page 173

"Don't Wait Until It's Too Late" and circumstances or your When I was your age, Tom, I was just where own. Today he is Vice -President of Lord & Thomas live-ne matter what your what was then considered a President of the New York Advertising Club as well. needs. All you need is the will to do and the de- you are today. I had J. G. Kingsbuy, President and Treasurer of the Grant to make the start. & Turner's Accounting Depart- So are cision good job in Black Manufacturing Co.. is a former L C. S. student. Here is the familiar I. C. S. coupon. It takes ment. My friends predicted great things for me. Overton Fulton. Secretary and Treasurer of the Alabama. and Richman, Production Manager but a moment to mark the work of your choice, "Then your mother and I were married Fuel & Iron Co., and J. F. obligation and not to need more money. But for the Cole Motor Company. tear out and mail. There's no pretty soon we began editor of Advertising and that one single act may be when I discussed the salary question with the head Robert E. Ramsay, former a penny of cost, yet the firm Selling, and now Vice -President of the J. F. Newcomb -the means of changing your whole life. Today- of the department he told me frankly that Company, of New York, is another man who says that the to your first worth. So does A. B. not "Tomorrow"-is the day take was paying me all my work was I. C. S. laid the foundation for his success. definite step toward Success. "I tell you, son, it was a bad night when I Hall, of Boston, who won the Associated Advertising Clubs cup for the best sales letter campaign. brought that news home to your mother. TEAR OUT HERE "It has been the same way ever since. Man Frank A. Bayer rose from assistant shipping clerk to while Traffic Manager of the National Paper Can Company: after man has been advanced over my head Clarence W. Collins became Freight and Passenger Agent INTERNATIONAL CORRESPONDENCE SCHOOLS I have just plodded along. with the Southern Pacific Railroad. and George A. Grieble. Box . A., Scranton, Pa. "Many of our old friends have grown away from of The Grieble Co., erected more than $6,000,000 worth of Without cost or obligation, please send me full information us because we could not keep pace with them. I buildings in Cleveland in 1920. about the subject before which I have marked Aubrey B. Carter secured a Civil Service appointment an X in the list below: haven't been able to send you to college. . with patient within six months after he started to study the BUSINESS TRAINING DEPARTMENT And through it all your mother has been I. C. S. and is now Secretary to the Comptroller of the and uncomplaining. United States Currency. []Business Management []Salesmanship would have Industrial Management []Advertising "The pity of it is that a single word []Personnel Organization []Better Letters changed my whole life! The success of the International Correspondence []Traffic Management ()Foreign Trade "Training! That was all I needed. Schools in Business Training, as well as in tech- []Business Law []Show Card Lettering "I had as much energy and ambition and as good nical subjects, has been due not only to the per- []Banking and Banking Law []Stenography and Typing a brain as any of the men who went ahead of me, sonal, problem -solving method of instruction of []Accountancy (including C.P.A.) []Teacher jobs opened up I wasn't also to the []Nicholson Cost Accounting []Civil Service but when the bigger which they were the originators, but ()Business English []Railway Mail Clerk equipped to step into them. high business and professional character of the []Bookkeeping []Com. School Subjects "Don't wait until it's too late, Tom. My own men behind the courses. []Private Secretary []High School Subjects life would be a different story if some one had Among the more than 300 men who have con- []Business Spanish []Illustrating only talked to mé when I was young as I am tributed their experience and advice to the prepara- []French []Cartooning talking to you today." tion of I. C. S. courses are: TECHNICAL AND INDUSTRIAL DEPARTMENT J. Lee Nicholson, C.P.A., First President of the National []Electrical Engineering []Architect Ask any man of 40 or 50 what he would do if he Association of Cost Accountants; Edgar P. Trask. Assistant []Electric Lighting (]Contractor and Builder could only go back and start over and he will tell Naval Architect, The William Cramp & Sons Shipbuilding []Electrical Wiring I] Architectural Draftsman you that he would study his work. Co.; Charles J. Nasmyth, F.A.A., C.P.A. Dr. Owen L. []Mechanical Engineer ()Concrete Builder These older men speak from experience. They Shinn. Professor of Chemistry. University of Pennsylvania; []Mechanical Draftsman []Structural Engineer it becomes harder and harder Stanley Rhoades, Telephone and Telegraph Engineer, New []Machine Shop Practice []Plumbing and Heating know that every year York Central By. ; J. H. King, Research Engineer, Babcock []Railroad Positions []Textile Manufacturing for any man to win even moderate success without & Wilcox Company, New York; Bradley Stoughton, Mining []Gas Engine Operating []Chemistry specialized training. Engineer, and formerly Secretary of the American Institute []Civil Engineer []Pharmacy This is particularly true of the young man in of Mining Engineers; S. G. Whitehead. Special Traffic []Surveying and Mapping []Automobile Work business. For business is becoming more complex Agent of the -American Express Company; A. Hamilton []Mine Foreman or Engineer []Navigation there Church, the well-known industrial engineer; Edward P. ()Steam Engineer pAgriculture and Poultry every day. And as it becomes more complex, Moxey, Jr., A.M., C.P.A., Professor of Accounting at the []Wireless []Mathematics is increasing demand for men who are trained to University of Pennsylvania; and Dr. Clarence Stratton, do some one thing well. Director of English, Cleveland Public Schools. is an easy, fasci- Name And the best of it is, there the course, if it is an I. C. S. course, nating way for you to get this training without Whatever Street present occupa- you can be sure it represents the best thought of Address losing a day or a dollar from your men who are leadersin that particular field and is tion. You can get it right at home through the Schools. drawn 'from their practical experience. City State International Correspondence It is the business of the International Corre- barely a living wage when Jesse G. Vincent was earning spondence Schools to help men to get ahead in Occupation he enrolled with the I. C. S. Today he is one of the business-to earn more money-to have happy, Vice -Presidents of the Packard Motor Car Company. Persons residing in Canada should send this coupon to the from the day Frank E. Fehlman enrolled for prosperous homes-to know the joy of succeeding. International Correspondence Schools Canadian, Six months of his the I. C. S. Advertising Course he started an agency They are ready to help you-no matter where you Limited, Montreal; Canada. Page 174 Radio Journal August, 1922 Radio War Strategy sector and were held there even after forces, the phantom American "X the real offensive at another point of Army" still held its front near Verdun The fine possibilities of radio are the line was started. And when the and opposite it were ranged five of armistice suggested in an account in the Tele- came with its showdown of Germany's crack divisions. phone Press of Brig. -Gen. Edgar Rus- sel, chief signal engineer officer of the A. E. F., who held back five German divisions without any army at all- with only a small group of telephone men. It was learned from prisoners that the Germans apprehended an attack in the direction of Briey and Metz. No such offensive was contemplated, but it would be most advantageous to fos- ter such a belief. Accordingly, Gen. Russel established a false army radio net and, using a code which could be deciphered without much difficulty, sent forth into the air a string of mes- sages that would indicate a large and general offensive along that part of the front. Telephone lines were strung in such places and in such ways that listening in would be easy and apparently valu- able for the Germans. The telephone squad of the mythical "X Army" grounded their circuits so that the messages could surely be picked up by the enemy. They even crawled out into No Man's Land and hooked their wires over German barbed wires and German telephone wires. The "care- less" squad also gossiped at night and talked shop over the wires, referring Photo by International Newsreel to friends who had just arrived with such and such a new outfit from HE WORKED TWENTY. YEARS ON THIS America and had been hurried to this IT WOULD BE PRETTY SOFT TO SIT AT HOME IN THE BOSOM OF YOUR FAMILY sector, and revealing by implication IN THAT COMFY CHAIR WITH important secrets of the movements of YOUR FAITHFUL JIMMY PIPE IN YOUR HAND AND the nonexistent "X Army" of shock SEE THE LATEST "MOVIE." WHAT? THAT'S WHAT C. FRANCIS JENKINS CLAIMS troops. HIS APPARATUS WILL DO FOR YOU. BOTH ARE PICTURED ABOVE. ARISE AND GIVE HIM THREE CHEERS-HIS PATIENCE Within two days the fine results be- IS WORTHY OF THAT-AT THE LEAST. gan to show themselves. The Ger- mans became very nervous. Raids to get prisoners and thus to secure in- formation became frequent. Troops were concentrated at the threatened BOXES for SUNBEAM Radio "B" Batteries RADIO EQUIPMENT Made from The SUNBEAM Has Oak, Gum, Spruce, Cedar, Mahogany, and Redwood Long Life and Strength No Order too Large; None too Small Manufactured in Los Angeles GOLDEN STATE Special Sizes Made to Order BOX FACTORY Western Electric 1200 East 8th Street Novelty Co. Phone 135-65 1250 East Sixth Street Los Angeles Our Salesman Will Call August, 1922 Radio Journal Page 175 A legal decision in the matter of Congressman Wallace White, Jr., Notes on Radio radio not being a nuisance was ren- of Maine, a member of the radio con- dered by Chancellor J. E. Martineau ference at Washington, is at work Regulation of Pulaski Chancery court, who had drafting the proposed radio bill regu- Any differences arising as to the refused to restrain two radio enthu- lating radio activity. administration of radio laws affecting siasts, father and son, from operating army and navy communication will be their wireless outfit at Little Rock, At about eight o'clock every evening placed with the president for decision. Ark., between 9 p. m. and 7. a. m. The the police department of Boston While radio is in the process of growth restraining order was asked by several broadcasts descriptions of fugitives there is little doubt that there will be persons who complained of buzzing from justice, and offers ten dollars to many interpretations of existing laws noices caused by the radio set inter- every radio amateur who assists in attempting to control its varied activi- fering with their sleep. The chancery making an arrest. ties. declared that the noise is one that per- * * * A compromise has been reached sons must become accustomed to, just There are close to three thousand between Senate and House on the as they have become accustomed to American ships carrying radio equip- time extension granted to the general noises of street cars, whistles, etc. ment. public and the press in the use of Fed- eral -owned radio. Gov. -Gen. Wood of the Philippine Islands forwarded to the War Department with his approval a resolution adopted by the American Chamber of Commerce of the islands urging continuation of the service Exchange Doubt for which otherwise would have expired on July first. Agreement was reached to permit public use of the facilities to June 30, Certainty 1925, with the exception of messages to China. The service to Chinese sta- tions under the compromise agreement will be terminated January 1, 1924. The Braun Corporation, with its 20 years International radio agreements made of experience in technical merchandising, has the shorter period necessary. stocked radio supplies and equipment. It is interesting to note that the House conferees rejected the proposed Trained radio men have carefully selected extension until 1927 in the belief that every article. ample private radio facilities will have The stock is complete. been established before the expiration of that period, capable of handling all The quality is right. commercial and press business. The deliveries are certain. The Sherman Anti-trust law has ap- have not the time to make the peared in the radio field in the resolu- You perhaps tion introduced by Representative necessary investigation. Fred A. Britten of Chicago directing We have made thorough investigation. the Attorney -General to investigate get the benefit. the operations and accounts of the You Radio Corporation of America, the American T. and T. Company, the of modern Westinghouse Electric and Manufac- We offer complete stocks turing Company, the General Electric Company and the United Fruit Com- Equipment pany, and to report to the House at Radio his earliest opportunity, what, if any, combination in restraint of trade exists between them in the field of wireless Southwestern Distributors for communication. According to report an agreement exists between all of these companies mIIIIIIÏ _ .,Vlllllf IIIIIIIIIIIInlllllu..1'T'MERIC which gives the Radio Corporation of CORPORATION America complete control of the man- AN111 ADIO AND ESEARCH ufacture, sale and regional rights of .Illllllmiiiiillui" the fundamental appliances and parts IIIIII''I'' ;IIIIIII .111111[ Ile..dllllliiiiii'plllll connected with wireless communica- :ems tions. It is further reported that al- he .%cogn ized Sfm 6d of suiverior Perfnnance though the shortage in radio tubes is so great as to inconvenience thousands of amateur operators, the United THE BRAUN CORPORATION States government is refused permis- sion to sell nearly 500,000 of these 363 New High Street Phone 10922 Los Angeles, California tubes which it has on hand as surplus- age since the war, and which it could "Braun Service is World Wide" sell at less than 50 per cent of the $6 charged by the Radio Corporation. Page 176 Radio JournalImaual August, 1922

WOODEN RADIO PARTS We Can Ship Once CALLS Mahogany Cabinets at Rotors 50c Variometer Sides 60c Pair Special Parts to Order BUFORD SPECIAL HEARD,` A-1 Woodworking Co. Wholesale and Retail Variometers 1338 San Julian St., Los Angeles -Vario Couplers -11 -Plate Variable Condensers RADIO SUPPLIES Radio Sets Built -23 -Plate Variable (Under this head we want to print to Order Condensers "Calls" received by Amateurs which -Plate Variable are received under difficult conditions -43 or from long distances. Send them in Radio Batteries Condensers with your name and address and also Our Specialty your "Call.") Order by Mail - Prompt Service Since an uninitiated Mirandy used Lippus Electric Co. the aerial for the family wash, there 953 South Grand Los Angeles has been a new version of the familiar doggeral: Buford Co. Mother shall I hang out the wash? Yes, my darling Muriel; Radio Department Hang the clothes on the telephone wires Fresno California But don't go near the aerial. "Principles of Radio * * * Communication" A petition has been offered in the common council of Kansas City to Professor Morecroft's new equip each fire station in the city with book is said to be America's a radio receiving outfit so the firemen most authoritative volume can "tune in" during the leisure hours before bedtime and enjoy the concerts on radio. It is published to which are "agitating" the air there- sell at $7.50. It will be abouts nearly every night. We won- given gratis for six yearly der if the ancient game of checkers subscriptions to Radio Jour- which has survived some thousands of nal. This book deals with all years is about to succumb at last. The JEWEL phases of the radio art, going firemen above mentioned say that they Receiving Sets are "tired of checkers and want jazz." completely into both theory Complete with head * * * and operation. It contains phones, aerial wire, Broadcasting for public entertain- 788 illustrations. ground wire and ment is conducted from the Eiffel insulators . . . 12 Tower station within a radius fif- Get on the Air! Hear Los Angeles, of Long Beach and Pasadena Concerts teen hundred miles from Paris. A sta- Patterson Electric Co. tion in north Africa 1450 miles away MANUFACTURERS reported having heard a concert. It is 239 S. Los Angeles St.. Third Floor J. F. BRACKETT Phone 15739 intended to install a more powerful apparatus for permanent service to RADIO CO. reach all parts of France. * * * How TO MAKE A Complete Line The Actors Equity Association A has of registered a protest against its mem- SIMPLIFIED CRYSTAL bers giving radio entertainment gratis, DETECTOR RECEIVING SET on the ground that the radiophone is a Radio Supplies with commercial enterprise and enters into competition with the theater. WHOLESALE HOOK-UPS AND DIAGRAMS * * * and 15c Those who have business with Cata- RETAIL lina cannot too definitely impress their We have had innumerable demands minds with the fact that the radio- for the June Radio Journal from phone all "fans" desiring to construct a receiv- catches up the telephone Head Phones ing set according to C. H. Dillinger's messages between the island and the article, but this issue was sold out mainland. Recently the fianceé of a In Stock almost over night, and we could not Catalina resident spent the day with fill the bill. Because of this demand Our Prices Are we have reprinted this article with him on the island, and returning with hook-ups and diagrams, in booklet her chaperon listened in to the enter- Los Angeles Prices form, for sale at 15c. If you want a tainment that came through the radio CRYSTAL SETS copy get your order in early. Stámps equipment on the boat. Suddenly the AUDION SETS accepted with mail orders. performance was interrupted by her A and B BATTERIES Radio Journal Pub. Co. fianceé's voice telephoning to another 113 Stimson Bldg. Los Angeles 169 N. FAIR OAKS girl. "Come on over, sweetie. It's all Pasadena right now." The engagement is off. August, 1922 Radio Journal Page 177

PROMPT-RADIO-SERVICE Racliosoph)) COMPLETE STOCK By FLORENCE G. ROGERS

Fresh Supply of Eveready B Bats $5.00 Where there's an aerial there's Remler Dials $1.00 PRMCO Detector Unit with Jack____$9.00 a fan. Framingham Rheos rec 1.00 PRMCO Amplifier Unit with Jack._$15.00 * * * Federal Jacks, All Styles All Kinds of Parts A little static now and then Postpaid if cash accompanies order. Get Our Bulletin Will irritate the best of men. 3305 Belmont Ave. * * * QST RADIO SHOP FRESNO, CALIF. As the whisker is bent, the tune's defined. * * * there a man with soul Breathes The Aerial of so dead KUS Who never to himself hath said, at 3000 Central "I'm going to rig up a receiving Avenue set, b'gosh!" * * * Distance lends enchantment to the listener -in. * * * The curfew tolls the knell of parting day; The joyous flivver vibrates on the lea; The owl car passes on its grind- ing way "KUS Talking" And leaves the world to Radio Here's a fact that is of interest to every man in Southern California ---because of re- and to me. duced costs, we are now able to clean their clothes by the famous Jenkins Process * * * for $1.50--50c less than it used to be. Tune in, and the world listens Call KUS on the air or South 120 or 27071 on the telephone ---our representative with you; will come to see you. Broadcast, and you broadcast alone. * * 3000 CENTRAL AVE. Home is where the receiving Uptown Store, 417 W. 7th St. Branch Stores: 224 S. Western set is. Ave., 6529 Hollywood Blvd.; Pasadena, 390 E. Colorado; * * * Long Beach, 4 Pine Ave.; Ocean Park, 140 Pier Ave. Oh what a tangled web we weave When we can't tune in to re- ceive. * * * Oft in the stilly night Ere slumber's chain has bound fhe me, 5 Ambitious boys can earn Scholarships in I tune exactly right International Correspondence School's Radio To get the music round mc. * * * Course by a few hours earnest Work securing Tall towers from little roof - trees grow. subscriptions to Radio Journal. Use this coupon * * * ad' If procrastination is the thief for )ancement. of time then radio is the thief of Radio Journal Publishing Co., distance. 113 Bldg., Los Angeles, Calif. * * * Stimson Kindly mail me complete details as to how I Though lost to sight, to Radio Gentlemen; dear. may earn a Radio Course Scholarship in the I. S. C. b9 se- * * * curing subscriptions to Radio Journal. I understand that this Far from the madding crowd's inquiry obligates me in no way. ignoble strife Their sober wishes never (Name) learned to stray; kick They listened in and got a Address) from life, (Street Yet never from their fireside moved away. (City) Page 178 -- Radio Journal r'"'""r August, 1922 and doings. Since the night of the Lewis -Car- Broadcasting report's are The members of the Chicago Real pentier fight, when the newspapers now allowed as the result of a confer- Estate Board who broadcasted the results of each round ence of officials of the government and attended the con- into the homes of countless amateur postoffice departments. The Man- vention of the National Association of radio fans, the London public has been chester Society-an amateur club- Real Estate Boards held in San Fran- held by the possibilities of this craze. has started the construction of a high cisco, traveled on a special train Newspapers are filled with radio news power wireless station at Baguely, equipped with radio. Cheshire, for the purpose of trans- mitting and receiving from America. At Last, a Crystal Receiver * * * Equal to any high-priced sets Sold in two forms at unheard-of low prices Police reports show that radioactiv- Dealers investigate-It's a wonder ity is increasing in the criminal class M. P. M. $3.50-$5.00 with radio propensities. Every month that passes records an increased num- Million ber of thefts of radio equipment. Point Mineral * * * NATURES FINEST Cleveland is behind the radio pro- SUPERSENSITIVE HIGHEST TEST cession. Her city fathers are propos- DETECTOR ing to charge a fee of two dollars for the installation of every receiving CRYSTAL set. (Direct From the Mine) Although the sixth largest city in the United States it has but one broadcast- Carefully selected, INDIVIDUALLY This Little Wonder receiver, which tests have TESTED, and packed. (Galena proved is equal to the best crystal receivers, ing station and comparatively few re- or has received concerts clearly and at dibly from Pyrites). SATISFACTION GUAR- 1 to 30 miles, code messages several hundred ceiving stations. ANTEED. miles. It's finished in Black Leatherette, orna- * * * Insist on getting "M.P.M." from your mental in design and sells postpaid for the small sum of $5.00. A neurologist of Newark, N. J., has dealer or by mail. We also manufacture the same instrument in the unassembled form with detailed cut show- been experimenting with radio waves 25e ing the simple means of assembling, which for medical purposes. He claims that also affords the purchaser the pleasure and The Most Sensitive Radio educational view of radio construction, for radio waves can be utilized to increase Crystal $3.50 postpaid. on Earth This is something unheard of in the annals metabolism, promoting secretions and of radio, and we advise all purchasers to excretions, and otherwise toning up place their orders now to assure immediate Million Point Mineral delivery. the general health. Please remit by money order only, favor * * * Company CLARK RADIO COMPANY Los Angeles broadcasting has been Los Angeles Office reported as having been 823 LOEWS STATE THEATRE BLDG. 1034 South Flower St. Los Angeles, Calif. heard as far north as Walla Walla, Wash.

No. Article Metal Finish Size Hole Thickness 1. Stationery Vg Dee. Condenser Plates. Aluni. Natural 3" 1" 24 .0201 2. Rotary Condenser Plates Aluni. Natural 21/4" 3-16" 24 .0201 3. Dials-Calibrated to 100 Brass Black 3" 3-16" 20 .0319 4. Stationary Washers Alum. Natural 9-32" 11-64" 12 .0808 5. Rotary Washers Aluni. Natural ye 3-16" 12 .0808 6. Solder Clips Brass Silver %,. 3-16" 28 .0126 7. Loose Coupler Spring Brass Silver 1,iy" , 28 .0126 8. Socket Spring Brass Silver 11/4" 3-16" 28 .0126 9. Rheostat Contact Spring Brass Silver 1%" 5-32" 28 .0126 10. Star Spring Brass Silver 7/8" 3-16" 22 .0253 11. Grid Condenser Plates. Copper Natural 5-32" 36 .005 12. Condenser Ends Fibre Natural .125

JUST TO REMIND YOU Our Parts Are Meeting with Universal Favor Los Angeles Rubber Stamp Co. 131 South Spring St., Los Angeles, Calif. August, 1922 Radio Journal Page 179

FRANK D. MACKAY, Manager INA MACMAHON, Mackay Business Colleges Principal 913 J STREET FLORENCE NOBLET, Fresno, Calif. Registrar

gei+ mbknì' It1Pcien4 5chool MACKAY BUSINESS COLLEGE Main at Ninth Los Angeles, California FULLY ACCREDITED By the National Association of Accredited Commercial Schools.

Check here for Free Catalogue, The Book of Business. Write your name and address below. oartn, the tuition fee by I How may ambitious young peonh assisting with light office work? (I Explain plan for earning Board, Room and $10.00 a montra while attending your day classes. n Secretarial Course n Bookkeeping Course Complete Commercial Course n Comptometry and Burroughs Calculator n Machine Bookkeeping and Bank Statement Machine Indexing I Filing and n Telegraphy II I wish to attend your Los Angeles School. n I wish to attend your Fresno School. MY NAME AND ADDRESS IS

Name Street

City State I

MAIL THIS BLANK TO I I i

I MACKAY BUSINESS COLLEGE I Ninth and Main Sts., Los Angeles, Calif. Page 180 Radio Journal August, 1922 With The Publisher

The wiseacres said, "Oh, it's just a Out of our mail sack we have duce to our readers Mr. Samuel G. fad. Radio will soon die out." And picked a letter at random of the McMeen. they proceeded to bury it. many we receive commending Radio Mr. McMeen has had a wonder- But say, for one who was "counted Journal. ful experience in telephone and radio out" Radio is the liveliest "come-back" Here it is- work. Just now he is engaged in ex- we have ever seen. perimental work, the results of which HUGH HARLAN, Editor, All those who have noticed the in- will be chronicled in Radio Journal in Radio Journal, due course. He will contribute regu- terest in radio waning please rise in Los Angeles, Calif. their seats. "Thank you, Mr. Pessi- larly to Radio Journal. Dear : mist, we hoped you would stand up. Sir In the September issue Mr. Mc- Am taking this opportunity of ex- Meen will have an extremely instruc- Now that you are on your feet, please pressing take look over the assembled multi- my sincere admiration of and tive and timely story on "Waves, a faith in the future of Radio tude. They believe in radio. They Journal. Wavelengths and Wavemeters," with The helpful hints and most interesting are working in the interests of radio. diagrams ; also an article on How to local matter places it far above the Use the Lighting System for an They see no decrease in radio en- others, have thusiasm. To the contrary, they are and I tried them all. Aerial, together with a diagram show- I constructed the loose -coupler set aware of the fact radio is rapidly ing just how it can be done. that as described in your July issue, and becoming a vital and integral part of am getting excellent results. Then in the October issue Mr. Mc - modern life. They realize that radio In fact, much better results than from a set I Meen will have a feature story that is to it here stay-that is getting bigger bought on the market. the whole world will read. It is en- and better-that it is a new industry- Very respectfully, titled "Hearing the Unhearable." It that it is going to be a wonderfully will have many is F. S. RENSHAW, diagrams. It going helpful servant of mankind. You, too, to make people sit up and rub their Mr. Pessimist, will realize this about 134-B W. Vernon, tars. Sounds interesting, don't it? ten years from now. Then you'll wish Los Angeles. you had taken advantage of your * * * Thank you, Mr. Renshaw. It is present opportunities. Now sit down We have in mighty good to be appreciated. many other features before someone crowns you with a store for you. It is our ambition to brick for obstructing his view of the * * * make Radio Journal a real Radio mag- glorious future." In this issue we are glad to intro- azine for real Radio fans.

We Have It- Wiring Diagrams If it has anything FREE To do with Radio In keeping with Newbery Expert Service we are giv- When you buy your radio supplies from us, you are sure ing to all those interested of the best high grade and nationally recognized lines on a complete set of wiring the market. diagrams. These show all Furthermore you have at your command expert service standard hook-ups, parts and the knowledge that we offer after 19 years' experi- needed and how to hook ence as the leading electrical supply house in Los Angeles. them up. Most Complete Stock of Radio Parts in City. They are invaluable to the beginner and offer to the Agents for-Colin B. Kennedy, Kilbourne & Chase, Grebe, Cannon and Gilbert Sets, Western Electric Loud expert many new and dif- Speakers, Kellogg, Couch, W. E. Head phones, and ferent methods of re- many others. ceiving. Let our experts help you with your home made sets and problems.

We are never too busy to Newbery Electric Corporation give you information. Phone 14265 724-26 SOUTH OLIVE STREET Bdwy. 5113 N N N N * N NN NN N,` hy Buy Imitations? `

The WIRELESS SHOP "Quality" Variable Condensers, due to their superior design and reliable reputation, are being imitated by many new concerns, most of whom are newcomers in the Radio field and are inexperienced in the manufacture of Radio Apparatus.

Our experience in the manufacture of "Quality" Radio Apparatus extends over a period of years, and Zi our men are trained in the manufacture of "Quality" Instruments. Our equipment is the finest obtainable.

In other words, "Why buy Imitations" when you can get "Quality" and Real Service from a Pioneer Radio Company? Our Reputation is behind every piece of apparatus we manufacture-and, incidentally, we really manufacture practically everything that is included in our extensive line of "Quality" instruments. We are not an assembling plant. Our instruments cost no more than the imitations-if "Quality" is con- sidered. You pay for "Quality" in the end. Why not buy "Wireless Shop" Apparatus and be assured of the "Quality"? And-just a little tip-if you are figuring on building a receiver (either standard or special), the time i's ripe to go after it right now. The summer slump, which occurs every year, is well on its way, and 44 we can give you exceptional service on special work for the next few weeks. Remember the rush and 44 shortage last winter. It will be worse this fall and winter, and although we are doing everything to increase our output and stock up on materials, it will be impossible to give you the service later that we can give you now.

We have a fully equipped plant and an exceptional machine tool equipment. Our men are espe- cially well trained in their line. Our stock is complete. The "Wireless Shop" Reputation is nationally known for "Quality." Let's get together. ¡ 4> Genuine "Wireless Shop Quality Apparatus," for your protection, is stamped, "Manufactured by The Wire- less Shop, Los Angeles, Cal." Do not accept substitutes or goods represented as being of our manufacture unless they bear our stamp. It costs you no more and you take no risk.

The No. 430 43 -Plate Condenser selling for $5.25, and the No. 230 23 - Plate, selling for $3.60, are only two o of the fourteen sizes and exceptional o 4300 values we offer in the variable line. y

: A.J. E DGCOMB sftowl

--- ,------1262 West Second Street Los Angeles, Cal. . E1© it # RadiotoneReeivadiotoneer

i

Type CR -10 Made by A. H. Grebe & Co. Price $374.50 Complete with Tubes and Batteries

ntenna Equipment $7.50 Additional

b.., erate The latest thing in Radio. An ornate 74' eral Cabinet Receiver, very simple to oper- 3roadcatinÇtat ion ate. Range up to 1000 miles. Call -KOC1 Radiotone has Regenerative Tuner with -z_s-=- zO wave length from 150 to 3000 meters; epresenta{ives Vacuum Tube Detector and 3 -stage E STINGNOUSE - GREBE RADIO- Amplifier control. Also B -Battery and RADIO CORP. AMERICA 6 -Volt, 100 Amp. Hr. Storage Battery. REMLER RADIO MFG Co'. Has Loud Speaker attachment similar to phonograph, a unit with Cabinet. Radiotone is an innovation on the Coast, having so far been sold only in the East.

Consult us for the best in Radio sets, and supplies of all kinds. WESTERN RADIO ELECTRIC CO. Oakland Wholesale and Retail Exclusively Branch 637 South Hope St., Los Angeles Radio 1200 Franklin Distributors wee.vveeivtnreeveteveveevvtee m111>i,NeeevM%IA1 Presa of the California Printing Co., 113-117 Stimeon Bldg., Loe Angeles

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