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| DATA S H E E T HIGH POWER CW KLYSTRON FOR GROUND TERMINALS LD7126 SERIES 17 GHz BAND, 2.0 kW/2.4 kW, HIGH EFFICIENCY, HIGH POWER GAIN GENERAL DESCRIPTION NEC LD7126 series are DBS Klystron Amplifiers which employ five cavities and are ideal for use in the earth-to-satellite communication systems. NEC provides the 2.0 kW model (Frequency : 17.3 to 18.1 GHz, Bandwidth (-1dB) : 80 MHz ) and the 2.4 kW model ( Frequency : 17.3 to 17.8 GHz, Bandwidth (-1dB) : 45 MHz ). All tubes are forced-air-cooled at any power level. An automatic channel tuner, which changes the operating frequency very quickly and simply, is available in all the series. Furthermore, they are of rugged and reliable design offering long-life service. FEATURES TM Compact and Light Weight (27 kg approx.) TM High Efficiency (The DC to RF conversion efficiency is typically 28 % or higher.) TM High Power Gain TM Long Life and High Stability TM Simple Cooling System (forced-air-cooled) TM Automatic Channel Tuner (8-12 Channels), Hand Tuner model is also available TM Permanent Magnet Focusing TM Rugged Construction For safe use of microwave tubes, refer to NEC document "Safety instructions to all personnel handling electron tubes" (ET0048EJVUM00) The information in this document is subject to change without notice. Document No. ET0213EJ3V0DS00 (3rd edition) Date Published August 1998 M Printed in Japan (c) 1996 LD7126 SERIES GENERAL CHARACTERISTICS ELECTRICAL Frequency ...................................................... Output Power ................................................ Heater Voltage ................................................ Heater Current ................................................ Cathode Type ................................................ Cathode Warm-up Time ................................. MECHANICAL Dimensions ................................................... Weight ......................................................... Focusing ...................................................... Mounting Position .......................................... Cooling ......................................................... Electrical Connections .................................... RF Connections Input ......................................................... Output ...................................................... Cavity Tuning Method .................................... Mates with UG-419/U Flange Mates with UG-419/U Flange 8-12 Channel Preset Tuning (Hand Tuner is also available) See Outline 27 kg approx. Permanent Magnet Vertical (Cathode down) Forced Air See Outline 17.3 to 18.1 GHz / 17.3 to 17.8 GHz 2.0 kW / 2.4 kW 6.6 V 3.3 A Indirectly Heated, Impregnated 300 s ABSOLUTE RATINGS ( Note 1, 2 and 3 ) ELECTRICAL Heater Voltage ................................................ Heater Surge Current .................................... Heater Current ................................................ Heater Warm-up Time .................................... Body Voltage ................................................ Body Current ................................................ Collector Voltage ............................................. Collector Current ............................................. Cathode Current ............................................. DC Input Power ............................................. Load VSWR Normal Value ............................................. Instantaneous Value .................................... MECHANICAL Collector Temperature .................................... Cooling Air Temperature ................................. Collector Air Flow .......................................... Body Air Flow ................................................ Gun Air Flow ................................................ MECHANICAL Ambient Temperature Operating ................................................... Storage ...................................................... +5 -50 +50 +70 C C - -10 650 200 41 +250 +50 - - - C C kg/hr kg/hr kg/hr - - 1.2 : 1 1.5 : 1 Min. 4.5 - - 300 - - - - - - Max. 7.5 7.0 4.5 - 10.4 30.0 10.4 1.1 1.1 11.44 Unit V A A s kV mA kV A A kW 2 LD7126 SERIES TYPICAL OPERATION (Note 3, 4 and 5) 2.0 kW Frequency ...................................................... Heater Voltage (Note 4) .................................... Heater Current ................................................ Body Voltage ................................................... Body Current ................................................... Collector Voltage ............................................. Collector Current ............................................. Cathode Current ............................................. DC Input Power ............................................. Driving Power ................................................ Output Power ................................................ Power Gain ................................................... Band Width (-1 dB) .......................................... Collector Air Flow .......................................... Collector Air Pressure Drop .............................. Body Air Flow ................................................ Body Air Pressure Drop .................................... Gun Air Flow ................................................... 17.3 - 18.1 6.6 3.3 9.8 10 9.8 0.9 0.9 8.82 84 2.1 44 82 660 1225 205 200 43 2.4 kW 17.3 - 17.8 6.6 3.3 9.8 10 9.8 0.9 0.9 8.82 24 2.5 50 47 660 1225 205 200 43 Unit GHz V A kV mA kV A A kW mW kW dB MHz kg/hr Pa kg/hr Pa kg/hr Note 1 : Absolute rating should not be exceeded under continuous or transient conditions. A single absolute rating may be the limitation and simultaneous operation at more than one absolute rating may not be possible. Equipment design should limit voltage and environmental variations so that ratings will be exceeded. Note 2 : The Klystron body should be at ground potential in operation. Note 3 : All voltages are referred to the cathode potential except the heater voltage. Note 4 : The optimum operating value is shown on a test performance sheet for each tube. Note 5 : Characteristics and operating values on this Data Sheet are based on performance test. These values may be changed as a result of additional information or product improvement. NEC should be consulted before using this information for equipment design. This data sheet should not be referred to a contractual specification. 3 LD7126 SERIES LD7126 SERIES OUTLINE (Unit in mm) Preset Tuner Model (260) 234.7 0.5 (208) ( 38) A (147) 33 1.5 (180) 5.8 0.1 106 3 (128) 133.4 0.25 142.2 0.5 (117.8) 0.01 6.3 +0.05 - (10) Detail B B 139.7 0.25 252.5 0.25 (275) 4 - 5.6 (125) Electrode Heater Heater-Cathode Color of Lead Yellow White Lock / Unlock Shaft Channel Shaft Body Col & Thermostat 5- 5 115 1 Terminal Thermostat (Nomally Close) 4-No.4-40 UNC 17.5 0.3 depth 5.8 MAX. RF Output (111) UG-419 / U 27 0.3 (8) 5.80.1 ( 70) (208) (14.65) (6.5) 15.5 0.3 (201) (224) 26.15 0.3 RF Input 36.84 0.3 36.84 0.3 UG-419 / U View from A 4 190 2 148 2 (136) 390 MAX. (13.4) (7) (335) LD7126 SERIES LD7126 SERIES OUTLINE (Unit in mm) Motor Driven Preset Tuner (Fast Tuning) Model A (260) 234.7 0.5 (208) 33 1.5 5.8 0.1 106 3 133.4 0.25 142.2 0.5 (177.8) 6.3 +0.01 -0.05 (150) Detail B (10) B 139.7 0.25 252.5 0.25 (174) (275) 4 - 11 (125) 4 - 5.6 Electrode Heater Heater-Cathode Color of Lead Yellow White Channel Shaft 4-No.4-40 UNC depth 5.8 MAX. 15P D-sub 115 1 Body. Col & Thermostat Terminal Thermostat (Nomally Close) RF Output 17.5 0.3 (5- 5) (8) (111) 5.80.1 UG-419 / U ( 70) (208) (14.65) (6.5) 15.5 0.3 (224) 26.15 0.3 36.84 0.3 36.84 0.3 Lock / Unlock Shaft for urgent RF Input UG-419 / U View from A 109 2 148 2 (136) (201) 5 390 MAX. (13.4) (27) (7) (335) LD7126 SERIES NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC Corporation or others. Printed on recycled paper |
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