LD7111 NEC | Alldatasheet
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Document No. ET0404EJ2V0DS00 (2nd edition) (GC-1069) Date Published August 1998 M Printed in Japan 17 GHz BAND, 1.7 kW, HIGH EFICIENCY , HIGH POWER GAIN The information in this document is subject to change without notice. © 1994 HIGH POWER KLYSTRON FOR GROUND TERMINALS LD7111 SERIES For safe use of microwave tubes, refer to NEC document “Safety instructions to all personnel handling electron tubes” (ET0048EJ*V*UM00) GENERAL DESCRIPTION The series of NEC LD7111 is a five-cavity Klystron Amplifier and ideal for use in the earth-to-satellite communication sys- tems. These are designed for operating at 1.7 kW CW over the frequency range of 17.3 to 18.4 GHz. The instantaneous bandwidth of minus one-decibel is at least 90 MHz over the entire 1.1 GHz range. All tubes are forced-air-cooled at any power level. An auto- matic 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. NEC LD7111 series is compatible with VKU7791Z6 by using an additional adapter.
FEATURES
ª Compact and Light Weight (27 kg approx.) ª High Efficiency (The DC to RF conversion efficiency is typically 23 % 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 ENVIRONMENTAL Ambient Temperature
TYPICAL OPERATION (Note 3, 4 and 5) Unit 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. 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.
LD7111 SERIES OUTLINE (Unit in mm) 5.8 – 0.1 234.7 – 0.5 (260) (208) 252.5 – 0.25 (275) (125)(10) (128) (208) (177.8) 139.7 – 0.25 142.2 – 0.5 133.4 – 0.25 106 – 3 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