LD7126 NEC | Alldatasheet

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Document No. ET0213EJ3V0DS00 (3rd edition) Date Published August 1998 M Printed in Japan 17 GHz BAND, 2.0 kW/2.4 kW, HIGH EFFICIENCY , HIGH POWER GAIN The information in this document is subject to change without notice. © 1996 HIGH POWER CW KLYSTRON FOR GROUND TERMINALS LD7126 SERIES For safe use of microwave tubes, refer to NEC document “Safety instructions to all personnel handling electron tubes” (ET0048EJ*V*UM00) GENERAL DESCRIPTION NEC LD7126 series are DBS Klystron Amplifiers which employ five cavities and are ideal for use in the earth-to-satellite commu- nication 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

ª Compact and Light Weight (27 kg approx.) ª High Efficiency (The DC to RF conversion efficiency is typically 28 % or higher.) ª High Power Gain ª Long Life and High Stability ª Simple Cooling System (forced-air-cooled) ª Automatic Channel Tuner (8-12 Channels), Hand Tuner model is also available ª Permanent Magnet Focusing ª Rugged Construction

Cavity Tuning Method ……………………………… 8-12 Channel Preset Tuning (Hand Tuner is also available) ABSOLUTE RATINGS ( Note 1, 2 and 3 ) ELECTRICAL Min. Max. Unit Load VSWR MECHANICAL MECHANICAL Ambient Temperature

TYPICAL OPERATION (Note 3, 4 and 5) 2.0 kW 2.4 kW Unit Collector Air Pressure Drop ………………………… 1225 1225 Pa 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 con- sulted before using this information for equipment design. This data sheet should not be referred to a contractual specification.

LD7126 SERIES OUTLINE (Unit in mm) Preset Tuner Model 5.8 – 0.1 234.7 – 0.5 (260) (208) 252.5 – 0.25 (275) (125)(10) (128) (208) 139.7 – 0.25 142.2 – 0.5 133.4 – 0.25 106 – 3 (117.8) 33 – 1.5 (180) (147) A B Detail B 6.3f +0.01 –0.05 5.8–0.1 View from A Electrode Heater Heater-Cathode Color of Lead Yellow White 115 – 1 Lock / Unlock Shaft 4-No.4-40 UNC depth 5.8 MAX. Body Col & Thermostat Terminal Thermostat (Nomally Close) RF Output UG-419 / U RF Input UG-419 / U Channel Shaft 190 – 2 148 – 2 390 MAX. (111)(224) (201) 26.15 – 0.3 27 – 0.3 (136) (6.5) (7) (8) (14.65) (13.4) (335) f ( 38)f 4 - 5.6f ( 70)f 5- 5f

LD7126 SERIES OUTLINE (Unit in mm) Motor Driven Preset Tuner (Fast Tuning) Model View from A Thermostat (Nomally Close) RF Output UG-419 / U RF Input UG-419 / U 109 – 2 148 – 2 390 MAX. 5.8 – 0.1 Detail B 6.3f +0.01 –0.05 5.8–0.1 Electrode Heater Heater-Cathode Color of Lead Yellow White 115 – 1 Lock / Unlock Shaft for urgent 4-No.4-40 UNC depth 5.8 MAX. Channel Shaft 15P D-sub Body. Col & Thermostat Terminal 17.5 – 0.3 15.5 – 0.3 (111)(224) (201) 26.15 – 0.3 (27) (136) (6.5) (7) (8) (14.65) (13.4) (335) f (5- 5)f 234.7 – 0.5 (260) (208) 252.5 – 0.25 (275) (174) (125)(10) (208) 139.7 – 0.25 142.2 – 0.5 (177.8) (150) 133.4 – 0.25 106 – 3 33 – 1.5 A B 4 - 5.6f 4 - 11f ( 70)f

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, copy- rights or other intellectual property rights of NEC Corporation or others. Printed on recycled paper