Radio mirror (Jan-Oct 1923)

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RADIO DIGEST March 24, 1923 ourfEAU TRANSMITS TEST WAVE SIGNALS FIRST "CHECK-UP" COVERS 1,000-MILE RADIUS Government Is Enabling Fans to Standardize Wavemeters and Other Equipment By Xi. M. Lamm "WASHINGTON, D. C. — The Bureau of Standards has been conducting preliminary tests to determine the practicability of regularly transmitting signals of known wave lengths. This has been followed by the bureau by the first regular transmission of such signals. The object of the work is to enable persons having Radio apparatus to standardize their wavemeters and other equipment. The preliminary tests included wave length measurements by observers located within 1,000 miles of Washington, and demonstrated the practicability of transmitting such waves. In general, the results were in fair agreement, but differences as high as 7 per cent existed. Wavemeters must be in closer accord than this and it is hoped that this system of standard wave transmission will result in more accurate measurement and adjustment of Radio apparatus of all kinds. Make First Transmission March. 7 From the information obtained, it appeared desirable to transmit standard wave signals after 11:00 P. M. Eastern Standard Time, when broadcasting stations are through with their programs. Therefore, the first regular transmission of standard waves on March 6 and 7 took place from 11 P. M. to 1:30 A. M., and included wave lengths from 550 to 1,500 meters. The general call for the transmission of standard wave lengths is "QST de WWV Standard Wave Signals" repeated and on the same frequency as the test signal. The standard wave signal is "WW V" repeated. In the announcements, the wave length of the test signal is stated. The general call and announcements are made by both Radiophony and Radiotelegraphy. For the standard wave signal and for announcement by Radiotelegraphy, unmodulated continuous waves are used. RESTORES HEALTH (Continued from page 1) The project is only one of the many achieved by Station WHAS in line with its policy of giving something a little better than that ordinarily heard by the invisible audience in the vicinity of Louisville. Credo Harris, director and manager of the station, is an idealist and has already done much toward the establishment of this reputation of the station. Many Plants to Build Health. Some time ago, Station WGI, Medford Hillside, Mass., inaugurated the policy of transmitting setting-up exercises each morning. These were followed by weight increasing and then weight reducing exercises. The range of WGI, however, has been somewhat restricted to the New England states on account of the peculiar geological strata of that vicinity. The wider range and larger audience of Station WHAS, it is believed, will popularize the Radiophone method of health-building. Several other stations have taken up the promotion of sports in their broadcast programs, and it is known that many of the plants are considering the upbuilding of the nation's health by the airphone. Frisco Radio Show Will Open April 3 Exhibits Include Latest Developments and Inventions in Bath Receiving and Transmitting Apparatus SAN FRANCISCO.— A complete Radio and Electrical show will open to the public Tuesday morning, April 3rd and will continue daily up to and including Sunday, April 8th. The entire Civic Auditorium here has been leased and arrangements for special display booth construction and decorations are under way. The Radio Exhibits will include the latest inventions and developments in both receiving and transmitting equipment and everything electrical will be displayed from electrically heated curling irons to mammoth motors and power apparatus. Special Features for Visitors J. C. Johnson, local manager for the American Radio and Electrical Exposition Company, reports that display booths are being provided for 144 exhibitors. He stated that in addition to the exhibits, special features would be provided for the public education and entertainment. An entirely new program is promised for each day. The Exposition has been endorsed by the Pacific Radio Trade Association, the Cal ifornia State Association of Electrical Contractors and Dealers, the San Francisco Electrical Development League and the Electrical Contractors and Dealers Association of San Francisco. Canadian Ether Cops Are on the Job to Check on Amateur Wave Lengths Fans in Canada Are Given More Latitude Than in Any Other CountryYet They Co-operate to Fullest Extent in Complying with Regulations on Transmission "Free 'as the air we breathe" has its limitations since Canada's "ether cops" are on the job checking up Radio amateurs who start agitating the upper strata with their sending apparatus and incidentally straying from the straight and narrow path of their prescribed wave length. Canada today has some 9,000 persons operating Radio outfits on receiving licenses and another 1,800 with transmitting licenses, in addition to the 50 licensed commercial stations which are operating in the Dominion. But with this number "in the air" at various times every day, there is little confusion or interference with commercial work, according to officials of the Radio Telegraphy Branch of the Department of Marine and Fisheries. Every person operating a Radio outfit in the Dominion is required to take out a license, classified according to station. Receiving stations are on a flat license rate of one dollar per year, these licenses being secured through postoffices all over the Dominion. When sending licenses are issued the licensee is given a specified wave length on which he may transmit. Amateur transmission stations are thus kept down to a wave length which cannot interfere with the work of commercial stations. In order to check the wave length which the amateur "fans" are using, inspectors have been appointed in cities of over 15,000 people, who work on a part time basis for a small salary and spend their evenings "listening in" to the various signals and gauging the wave lengths on which they are sent. These inspectors also deal with complaints from receiving stations whose work is interfered with by any amateur sender. Some twenty-five of these "ether cops," as they are called, have thus far been appointed, and the results have more than justified the steps taken, according to officials at Ottawa. Amateur senders have cheerfully complied with the regulations, it is stated, and during the forbidden hours, 7:30 to 10 p. m., which are reserved for the larger stations sending concerts and similar material, there has of late been very little difficulty with persons who formerly delighted in "jazzing up the air" to the discomfiture of their hearers. The expense of maintaining the "ether cops" brigade, which is composed chiefly of ex-service men who took up aerial communication work during the war, is more than met by the money received from license fees, it is stated at the Department, and as a result Canada probably suffers less from interference in aerial communication than any other country in the world. In many cases it has been found by investigation that when complaints against amateurs were received, the signals complained of really came from ships many hundreds of miles away, whose signals were clearly transmitted through some freak of atmospherical conditions. Amateurs in Canada are given more latitude than in any other country where Radio has become popular, officials of the Department claim, and with this they have earned the respect of commercial senders everywhere by their adherence to the regulations under which they may work. New licenses are being issued every day in great numbers, it is stated, r.nd indications are that during the last few months more people have taken to Radio as a fad than had ever thought of it previously. CONTENTS Radio Digest, Illustrated, Volume 4, Number 11, published Chicago, Illinois, March 24, 1923. Published weekly by Badio Digest Publishing Company, 123 West Madison Street, Chicago. Illinois. Subscription rates, yearly. Five Dollars: Foreign, Six Dollars; single copies. Ten Cents. Entered as second-class matter April 27, 1922, at the postofflce at Chicago, Illinois, under the Act of March 3. 1879. "All the Live News of Radio" 1 to 7 Receiving Records Contest 4 New Orleans Boasts Three Plants, by Vera Brady Shipman .'..'.'..' S Microbes on the Microphone, Comic Strip; Station WGI Blind Experiments 7 Directory of Broadcasting Stations, Part III, Schedules and Station— State, City Index 8, 9 Editorials; Condensed by Dielectric; Indigest, Humor Column 10 A-B-C Lessons for Radio Beginners, Chapter XII— Regenerative Radio Receivers, by Arthur G. Mohaupt U Use of Two Aerials Eliminates QRM "."'.!.!!"!! 12 Latest Reflex Is "Inverse Duplex," a Description of the Grimes Inverted Reflex Receiver 13 How to Construct a Flewelling Super Set, the Third Prize Winner in the $100 Flewelling Set Contest, by A. J. Barclay, C. E 14 About Radio Parts; Book Reviews 16 Construction of the Ultra Reinartz Receiver, Part I— The Circuit and How to Make Tuning Unit, by H. J. Marx .....T......7 17 Hook-Up R.D. 77, How to Add Radio Frequency; Five Workshop Kinks..... IS Questions and Answers ...,,, .. 19 Radio Illustrated, a Page of Pictures .,.....!. I!!!!!!!! 20 Looking Ahead The Second Prize Flewelling Set, designed by F. P. Hall, Owego, New York, will be described by Mr. Hall in the next issue of the Digest. Mr. Hall has shown very unique design and it will pay all Flewelling fans to read this article. The first prize winner, designed by Lawrence M. Blakey, student at Georgia Tech, will appear in the April 7 issue. The Ultra Reinartz Receiver, Part II, next week will tell how to go about laying out the panel. This improved, long distanced receiving set, designed by H. J. Marx, has many advantages to its credit. A-B-C Lessons for Beginners, Chapter Thirteen, next week will deal with Radio frequency amplification. The successful use of Radio frequency amplification demands a complete knowledge of its peculiar traits. Read A. G. Mohaupt's Chapter 1 2 in this issue and continue reading next week, E. T. Flewelling in Part VIII of His Series, to appear next week, will describe the construction of a Flivver Super for both long and short wave reception. The Only Complete and Weekly Directory of Broadcasting Stations appears in Radio Digest. Part I will appear next issue. The directory lists every broadcasting station in operation in Canada, Cuba, Alaska, Hawaii, Porto Rico, and, of course, the United States. More Pictures of Announcers — Stanley W. Barnett of WOC, Davenport, J. N. Cartier, of CKAC, Montreal, and Emory L. O'Connell of WGAT, the American Legion station in Omaha, Nebraska, will be the mysterious voices pictured in the next issue of the Digest. Did You Ever See a Real Cave-Man? Well, Radio Digest has located one down in Virginia and found that he was able to build himself a complete receiving outfit capable of reaching across the Continent. Watch for the story by Armstrong Perry in next issue. , Newsstands Don't Always Have One Left WHEN YOU WANT Radio Digest YOU WANT IT! BE SURE OF YOUR WEEKLY COPY BY SUBSCRIBING NOW SEND IN THE BLANK TODAY Publisher, 123 West Madison St., Chicago, Illinois. Please find enclosed check M. 0. for Five Dollars (Six, Foreign) for One Year's Subscription to Radio Digest, Illustrated, Name •.*••• ,s>rcFv, *,. ,03* *tt, »»•««-«•/, ,t?v,»,i flu dress T?. . . . * . • * v. . . .t. » . • . .pr. ■ . ...••••*.. ■ City mr..w 6tet( ........t-.~. FANS DISSENT WITH PLAN FOR SILENCE "STAGGERED HOUR" FAILS TO REGISTER Chicago Broadcasting Stations Fear Proposed Project Would Be Costly to Them CHICAGO. — The "staggered-hour" plan for enabling fans to reach into the ether and bring in the waves broadcast by distant stations is not meeting with the approval that was anticipated by the authors of the idea. Instead of the one hour of silence each day, the majority of fans who have expressed their views prefer to have the silent-night plan continued. There is also a feeling among the broadcasters in Chicago that if they are to keep off the air they should do so for economic reasons on one night rather than cancel programs at varied hours throughout the week. Idea of Plan The staggered-hour plan would close stations in, Chicago between 6 and 7 o'clock Monday evening, between 7 and 8 Tuesday evening, between 8 and 9 Wednesday, between 9 and 10 Thursday, between 10 and 11 Friday and between 11 and 12 o'clock Saturday. Opposition to this plan has sprung up among persons who object to simultaneous broadcasting, because they fear that under the staggered-hour plan there will never be a time when only one Chicago station is in the air. It is feared that under the silent-hour plan stations might book programs too extensive for broadcasting before being compelled to shut down for the silent hour, and rather than release the talent the stations would open up at the conclusion of the silent hour, when some other station on a different wave-length was supposed to have the air without interference. WGR— STATLER PLANT (Continued from page 1) five 250-watt tubes, three acting asoscillators and two as modulators. The present Federal station, WGR, is a 500-watt station with a 2,000 mile range. Its messages have been picked up at points in Florida, Texas, California, Oregon, Saskatchewan and other points in northern Canada. None of the present apparatus will be used in the new installation, the old station being retained for experimental purposes only. Ii. C. F. Horle, chief engineer of the Federal Company, will have charge of the new installation. M. .A. Riggs will be in charge of the studio.' L. B. Wellen will be announcer. Special Cables Throughout Hotel A feature of the. new installation is that special cables will connect with all the public rooms in the hotel, so that by plugging in a switch, a speech being made or music in any of the public rooms will be broadcast. The Buffalo Hotel Statler is installing two large, specially constructed Wurlitzer organs, one in the ball room and the other in the main dining room, and organ recitals will be regular features from the Federal station. The Statler Company is also bringing to Buffalo from the Hotel Pennsylvania, New York, Vincent Lopez and his famous orchestra. They will be in the city for the opening of the hotel and remain for some time. While here, there will be daily concerts by the Vincent Lopez orchestra. Plant Shows Steady Growth The Federal Telephone & Telegraph Company secured its broadcasting license in March, 1922, and started with a set having a radius of 100 miles. May 21 of that year a set was completed with a calculated radius of from five to 800 miles, at which time WGR was opened. The present location of the station WGR on the outskirts of Buffalo, has mitigated against securing all the best talent corning to the city, as many artists have declined to make the long trip to the plant, either because of lack of time or the inconvenience. It is anticipated that the new location, in the business heart of the city, will result in a great improvement in the quality of the concerts broadcast from WGR. Passenger on Moving Train Gets Message Through Air BUFFALO, N. Y. — The first recorded 11317 stance of a commercial Radiogram reaching a passenger on a moving train recently occurred on the Lackawanna Railroad, when a message received by telegraph at a station en route after the train had passed was relayed to it from the railroad broadcast station. Fans Fight Induction CHILLICOTHE, O. — Walter Barrett and Charles Wissler, of this city, are making an experiment that is being watched by local Radiophans. They are endeavoring to get rid of the noise caused by induction from the city arc lights and other high tension electric lines. ■MM