Radio Broadcast - 1924, January - 84 Pages, 8.2 ... - VacuumTubeEra

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1 88 Radio BroadcastThe broadcast listener was alert, capable, andextremely willing to do his bit, even to the extentof considerable expenditure for telegramsand long distance phone calls. For instance,one youth in Connecticut had a telegram in ouroffice ten minutes after a British program hadfinished,reporting his reception of it.In order to facilitate communication of thischaracter, Commercial Vice-President C. A.Comstock of the Postal Telegraph-Cable companyagreed to use every facility of his company,through careful instructions to his district officemanagers, to hasten the delivery of messagesfrom listeners-in in various sections of thecountry to the Garden City laboratory.SPECIAL RECEIVING STATIONSA LTHOUGH every effort was made toJ\ have the receiving station in RADIOBROADCAST laboratory the finest possible, wewished to enlist the best radio aid in thisOnsection of the country in receiving England.the first night of the test, in RADIO BROAD-CAST'S Laboratory, Paul F. Godley (best knownto American fans through his successful receptionof American amateur signals, in Scotland,in November, 1921) and C. L. Farrand(Mr. Godley's associate), operated a speciallyconstructed tuned radio-frequency amplifierreceiver employing a three-foot loop antenna.George J Eltz, J .r., manager of the radio department of the Manhattan Electric Supply Company,used a nine-tube super-heterodyne whichhe constructed especially for the test. A. J.Haynes, Vice-President of the Haynes-GriffinRadio Service, Inc., operated a seven-tubesuper-heterodyne, which was also constructedfor these tests. All of these receivers pickedup English signals.On the last night of the tests, Frank M.of the De Forest RadioSquire, Chief EngineerTelegraph and Telephone Company, picked upEngland on a six -tube reflex receiver.Located outside of New York andcommunicating with our laboratory,were Dr. Walter van B. Roberts, ofthe Palmer Physical Laboratory,Princeton University, with a superheterodyneof his own design. Dr.L. M. Hull of the Radio FrequencyHENRY FORDWho spoke to England from his own station, WWI, at Dearborn,Michigan, on November 3Oth. Mr. Ford had never made a radioaddress beforeLaboratories at Boonton, N. J.,operated a six-stage tuned radiofrequencyreceiver. Engineers of theGeneral Electric Company moveda receiving station from Schenectedyto a point outside the city inorder to get better signals. Besidesthese, Mr. Frank Conrad, ChiefEngineer of the WestinghouseElectric and Manufacturing Company,listened- in at Pittsburgh,Pa. Several of the students atRensselaer Polytechnic Institute atTroy, N. Y., used a 12-tube superheterodyneof the resistance-coupledtype.Operators atmost of the broadcastingstations kept us advised ofthe results they obtained. At StationCFAC, Calgary, Alberta, operatorsused a ten -tube superheterodyne.Operators at WOC,Davenport, Iowa, WOR, Newark,N. J., and KSD, St. Louis, alsoadvised us of their success.
The TransatlanticBroadcasting Tests and What They ProveDIFFICULTIES AND ADVANTAGES INENGLANDTHE difficulties in arranging thistest were not only electrical,but physical. It is well-known thatradio signals cover much greaterdistances at night than during daylighthours. For this reason, it wasthought advisable to run the testsduring a period when completedarkness prevailed between theEnglish stations and the UnitedStates and Canada. From 10 to10:30 P. M. Eastern" Standard time,the period chosen for these tests, is7 to 7:30P. M. on the West Coastand from 3 to 3:30 A. M. in England.Picture the problem of the BritishBroadcasting Company. They hadeight stations, joined by land wireto the central offices in London.They had large staffs to maintain,during these extra hours. An additionalforce of experts was requiredat their central office to handle themass of detail incident to keepingthe whole eight stations runningsmoothly. Besides, the strain onthe operators and managers wasconsiderable. Not only had theyto broadcast during their usualhours, but each night for a week theentire crew was kept up until atleast four every morning with Americantransmission and reception.Besides this, the telephone exchanges leadinginto the Broadcasting Company's offices werepositively clogged with calls after and duringtheir tests. There was also an enormous influxof mail from British listeners.There were, however, four distinct advantagesthat British listeners had over those inAmerica. All the British stations were undersingle control. There was, then, no interferencefrom other broadcasting stations inEngland. Oscillating receivers, which proveda serious source of interference in cities in theUnited States, are prohibited by law in England.Furthermore, the American stationsused a great deal more power to transmitthan the English. And finally, the arrangementof programs offered slight difficulty tothe English also, since all the stations werecontrolled at one office.SENATORE GUGLIELMO MARCONIAt 3 A.M., London Time, November 28th, he addressed the Americanlisteners-in through the eight stations connected by land lines to thecentral office in LondonIt would seem that it must be a notable eventindeed which would keep Guglielmo Marconi,whose speech was recorded in this country,up until three o'clock in the morning. SenatoreMarconi, in his radio address, mentionedthis significant fact: it was just twenty-twoyears ago in December that the experimenttook place wherein he received from Poldhu,England, that eagerly awaited letter "S" atSt. Johns, Newfoundland.ONEA WRECK OFPLANS AVERTEDof the most serious situations we hadto deal with presented itself on Thanksgivingmorning. The tests conducted fromEngland the night before had been quite unsatisfactory,due to the failure of many of theAmerican broadcasting stations to shut down,together with unfavorable atmospheric con-
Page 1 and 2: RADIO BROADCAST ADVERTISERClearones
Page 3 and 4: The Transatlantic Broadcasting Test
Page 7: The Transatlantic Broadcasting Test
Page 13 and 14: What Radio Means at a Rocky Mountai
Page 17 and 18: THE WRITER, THE SCEPTICAL GUIDE, AN
Page 19 and 20: Listening-in in Mammoth Cave 199he
Page 21 and 22: What You Should Know About Antennas
Page 23 and 24: Screw EyeInsulatorWhat You Should K
Page 25 and 26: THE MISSOURI STATE PRISON CONCERT B
Page 27 and 28: RADIO ON WHEELSHere is a six-tube M
Page 29 and 30: A Good Book on Radio 209There are d
Page 31 and 32: A Simplified Super-Heterodyne 21 IF
Page 33 and 34: A Simplified Super-Heterodyne 213be
Page 35 and 36: theA Simplified Super-Heterodyne 21
Page 37 and 38: Various Circuits and What They Mean
Page 39 and 40: Various Circuits and What They Mean
Page 41 and 42: MR. STEVENS SHOP IN WASHINGTON, D.
Page 43 and 44: The Second of a Series of Three Art
Page 45 and 46: How to Neutralize the Neutrodyne 22
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Radio Broadcast - 1924, January - 84 Pages, 8.2 ... - VacuumTubeEra

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