Northrop Grumman Introduces New CEA Tubes For UHF Television Transmitters

Apr 18, 2001, 01:00 ET from Litton Industries

    WILLIAMSPORT, Pa., April 18 /PRNewswire/ -- Litton Industries' Electron
 Devices Division (EDD), a subsidiary of Northrop Grumman Corporation
 (NYSE:   NOC), today announced the release of its new Constant Efficiency
 Amplifier (CEA) tubes for UHF television transmitters.  The new CEAs are
 Inductive Output Tubes (IOT) that feature twice the power efficiency of
 standard IOTs, thus providing television stations with substantial cost
 savings through decreased power consumption.
     The patented CEA represents the first significant technology advance for
 UHF television transmitters in 10 years.  The CEA combines IOT technology with
 a multiple stage depressed collector (MSDC), a combination that allows the CEA
 to operate at a total power conversion efficiency of about 60% compared with
 30% for conventional IOTs in digital 8VSB TV service, which translates to a
 savings of roughly $20,000/yr/tube in power expenses.
     "The Litton CEA is the only IOT for UHF transmitters that can slash power
 costs while increasing reliability and stability," stated Robert Symons,
 Litton EDD technical director.  "Given the additional expenses that television
 stations have faced in the transition to digital, as well as ever increasing
 power costs, a product like the CEA that increases performance while reducing
 operating expenses is a very exciting development for the industry as a
 whole."
     The CEA is a combination of two proven Litton technologies, an IOT with an
 MSDC. Because of the electron collection efficiency of the MSDC, power
 consumption is reduced by about one-half compared with any other electron tube
 or solid-state technology.  Correctable average power output of 27 kW has been
 demonstrated, matching the power available from conventional IOTs.  The
 collector is oil-cooled using Poly Alpha Olefin oil, which allows operation at
 high average power.
     Litton CEAs will be available from leading transmitter manufacturers in
 new transmitters in the fourth quarter of 2001.  The Litton content will
 consist of the CEA tube and a circuit assembly that contains the input and
 output RF cavities plus electromagnets.  Retrofit kits that allow CEAs to be
 used in older transmitters are under development with leading transmitter OEM.
 
     About Litton
     Litton Electron Devices in Williamsport, Pa., a subsidiary of Northrop
 Grumman Corporation, has been a part of Litton Industries, Inc. since 1965.
 The factory produces the industry's most comprehensive line of magnetrons,
 klystrons, cross-field amplifiers, traveling wave tubes, thyratrons and
 broadcast IOTs.  Litton IOTs incorporate the latest developments in material
 science, computer modeling and vacuum technology.  Combining pyrolytic graphic
 grids and innovative collector cooling technology, Litton IOTs provide many
 years of trouble-free operation.
 
     About Northrop Grumman
     Northrop Grumman Corporation is a $15 billion, global aerospace and
 defense company with its worldwide headquarters in Los Angeles.  Northrop
 Grumman provides technologically advanced, innovative products, services and
 solutions in defense and commercial electronics, systems integration,
 information technology and non-nuclear shipbuilding and systems.  With
 80,000 employees and operations in 44 states and 25 countries, Northrop
 Grumman serves U.S. and international military, government and commercial
 customers.
 
 

SOURCE Litton Industries
    WILLIAMSPORT, Pa., April 18 /PRNewswire/ -- Litton Industries' Electron
 Devices Division (EDD), a subsidiary of Northrop Grumman Corporation
 (NYSE:   NOC), today announced the release of its new Constant Efficiency
 Amplifier (CEA) tubes for UHF television transmitters.  The new CEAs are
 Inductive Output Tubes (IOT) that feature twice the power efficiency of
 standard IOTs, thus providing television stations with substantial cost
 savings through decreased power consumption.
     The patented CEA represents the first significant technology advance for
 UHF television transmitters in 10 years.  The CEA combines IOT technology with
 a multiple stage depressed collector (MSDC), a combination that allows the CEA
 to operate at a total power conversion efficiency of about 60% compared with
 30% for conventional IOTs in digital 8VSB TV service, which translates to a
 savings of roughly $20,000/yr/tube in power expenses.
     "The Litton CEA is the only IOT for UHF transmitters that can slash power
 costs while increasing reliability and stability," stated Robert Symons,
 Litton EDD technical director.  "Given the additional expenses that television
 stations have faced in the transition to digital, as well as ever increasing
 power costs, a product like the CEA that increases performance while reducing
 operating expenses is a very exciting development for the industry as a
 whole."
     The CEA is a combination of two proven Litton technologies, an IOT with an
 MSDC. Because of the electron collection efficiency of the MSDC, power
 consumption is reduced by about one-half compared with any other electron tube
 or solid-state technology.  Correctable average power output of 27 kW has been
 demonstrated, matching the power available from conventional IOTs.  The
 collector is oil-cooled using Poly Alpha Olefin oil, which allows operation at
 high average power.
     Litton CEAs will be available from leading transmitter manufacturers in
 new transmitters in the fourth quarter of 2001.  The Litton content will
 consist of the CEA tube and a circuit assembly that contains the input and
 output RF cavities plus electromagnets.  Retrofit kits that allow CEAs to be
 used in older transmitters are under development with leading transmitter OEM.
 
     About Litton
     Litton Electron Devices in Williamsport, Pa., a subsidiary of Northrop
 Grumman Corporation, has been a part of Litton Industries, Inc. since 1965.
 The factory produces the industry's most comprehensive line of magnetrons,
 klystrons, cross-field amplifiers, traveling wave tubes, thyratrons and
 broadcast IOTs.  Litton IOTs incorporate the latest developments in material
 science, computer modeling and vacuum technology.  Combining pyrolytic graphic
 grids and innovative collector cooling technology, Litton IOTs provide many
 years of trouble-free operation.
 
     About Northrop Grumman
     Northrop Grumman Corporation is a $15 billion, global aerospace and
 defense company with its worldwide headquarters in Los Angeles.  Northrop
 Grumman provides technologically advanced, innovative products, services and
 solutions in defense and commercial electronics, systems integration,
 information technology and non-nuclear shipbuilding and systems.  With
 80,000 employees and operations in 44 states and 25 countries, Northrop
 Grumman serves U.S. and international military, government and commercial
 customers.
 
 SOURCE  Litton Industries