Radio Age - 1952, April -34 Pages, 2.9 MB, .PDF - VacuumTubeEra

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Complete Chain of Television EquipmentReady for Opening of UHF BandJL ORGING of the final link in the electronic chainthat makes ultra-high frequency television a practicable,commercial possibility, was disclosed by RCA lastFebruary at a seminar in Washington. DC. At tliattime, the company revealed a complete line of UHFselectors, antennas, transmitters, and associated equipment— everything needed for transmission and homereception of UHF television — would be available assoon as broadcasting is begun in the upper reaches ofthe radio spectrum.The chain had taken 20 years to forge.Earlier linkswere labelled research, development, experimental broadcasts,and field testing. It had been a vast and difficultundertaking — charting the ultra-high-frequencies fortelevision was comparable to the geographical explorationof a continent. But with RCA's announcement inthe nation's capital,the development phase of UHF-TVended, and the commercial about to begin.Two hundred of the country's leading televisionengineers, consultants, and attorneys, plus representativesof the Federal Communications Commission, attendedthe RCA seminar and applauded the company'sreport.They heard representatives of the RCA Victor Divisiondescribe a multi-channel selector designed to receiveprograms on .ill channels in the UHF band, housed inits own attractive cabinet and equipped with its ownon-ofF and tuning knobs.Also announced were simple, inexpensive onechanneland two-channel selectors, for use with presentVHF receivers in areas where only one or two UHFstations go on the air.All three selectors, it was noted, are easy to install.ind will function with any make of television set.In addition, participants in the seminar learned, RCAVictor will produce a complete line of combinationreceivers, providing reception in a single instrumentfor both UHF and VHF.Tiie RCA Service Company reported that new UHFreceiving antennas are available in various styles to meetspecified reception needs.They differ radically in designfrom the now-familiar VHF antennas. The new antennas,designed to meet special requirements of UHFtransmission, have been evaluated and classified by RCAService Company engineers on the basis of extensivefieldtests.At other sessions, engineers of the RCA VictorDivision unfolded the company's plans to meet anticipatedbroadcast needs during the next few years, andgave a preview of new products and developments.^'6-.Left: Compact all-channel UHF selector, designed by RCA for use with existingtelevision receivers to bring in all UHF programs in any area. Below: Some of thetypes of development UHF antennas designed by RCA engineers..^1
Improved model RCA Image Orlhicon camera which providesbrighter, sharper TV picture reception in the home.A UHF antenna which helps in eliminating reflections incities and improves picture quality in fringe areas.Among the more important disclosures were newl-kw and 10-kw UHF transmitters, high-grain antennas,and associated equipment capable of providing up to200-kw of effective radiated power in the 470-890megacycle frequencies.Engineers of the RCA EngineeringProducts Department described design features ofthe equipment, including new developmental UHF tubesof several type, special low-loss UHF long-shouldertransmission line with inner conductor bullets, in severaldiameters, and constructional details of the company'snew slotted UHF antennas.The conference was the latest in a series of meetingsand demonstrations undertaken by theRadio Corporationof America to aid broadcasters in laying plans forUHF television operation.At the annual convention of the Institute of RadioEngineers in New York, two weeks after the Washingtonseminar, initial models of the new selectors andreceiving antennas were given their 6rst public showing.The solid proof of accomplishment w.is there for allto see.Final Equipment DetailsAddedEarly this month, RCA filled in the final details ofthe TV equipment picture. During the annual expositionof the National Association of Radio and TelevisionBroadc.tsters, in Chicago, the company unveiled initialmodels of its complete line of UHF transmitters, studioequipment, antennas, and home selectors, as well as newVHF equipment and a dramatically advanced new imageorthiconT\' camera.The new transmitters, which are capable ot piittmgstronger signals on the air, will result in pictures ofgreatly increased brightness and contrast.The UHF equipment developed by RCA is theresult of more than two decades of studies, field tests,and experimentation, climaxed by work at the company'sexperimental UHF station at Stratford, near Bridgeport,Connecticut. Built by RCA and operated by NBC, thisOther television manufacturers have brought theirequipment to Stratford and, in cooperation with RCA,tested and perfected products for the new service.is the first and only such station to transmit daily programs.Representativesof the FCC have journeyed there to study thelatest developments. This quiet corner of New Englandhas grown into the engineering capital of UHF television.The location where RCiA built the station is knownin the community as Success Hill. The work accomplishedthere will eventually enrich the lives of millions.Tests at Stratford and elsewhere have proved that,contrary to earlier expectations of some elements of theindustry, UHF television brings clear, sharp, dependablepictures, comparable in quality to VHF reception.Television's conquest of the ultra-high frequenciesiTieans the medium can now extend its ser\'ice to virtuallyevery corner of the land. More than 1 ,000 new stationsare expected to share the UHF channels, and theywill bring pictorial reports of world affairs and some ofthe finest entertainment available to towns and villagesthroughout America.RADIO AGE 19
Page 1 and 2: RADIO AGERESEARCH • MANUFACTURING
Page 3 and 4: mmmiVOLUME 11 NUMBER 3I • MANUFAC
Page 5 and 6: wmmTV and RadioPlan ('onvcnrion C^o
Page 7 and 8: Artist's interpretation of NBC's ex
Page 9 and 10: wm"entitles you to the commendation
Page 11 and 12: mrmmmmmwmfrom a crucible of molten
Page 13 and 14: mmmMFBIIl TA TV camera and commenta
Page 15 and 16: W,-First Floating Broadcaster to Hu
Page 17 and 18: TowardAmerica Moxcs SteadilyJEqual
Page 19: Plastic"Props" for Television Shows
Page 23 and 24: Monitor screen (left) shows magnifi
Page 25 and 26: Air Conditioners and DchuniidihcrsM
Page 27 and 28: "Melodic,"Selectino; N4ood Music fo
Page 29 and 30: Fadino- of Radio Sitinals Minimized
Page 31 and 32: 1Meral-ShcllKinescopesI Continued f
Page 33 and 34: The Mjslrrof ESSCK HA I lANOOGA.tie

Radio Age - 1952, April -34 Pages, 2.9 MB, .PDF - VacuumTubeEra

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