LD7235 SERIES GHz, CONDUCTION COOLING, HIGH POWER GAIN GENER

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LD7235 SERIES GHz, CONDUCTION COOLING, HIGH POWER GAIN GENER

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HIGH POWER TRAVELING WAVE TUBE COMMUNICATIONS
LD7235 SERIES
GHz, CONDUCTION COOLING, HIGH POWER GAIN
GENERAL DESCRIPTION
LD7235 series PPM-focused traveling wave tubes designed final amplifiers earth-to-satellite communications transmitter, LMDS (Local Multipoint Distribution Service) other advanced communication systems. Three models LD7235 series capable delivering output power over range 26.5 31.1 provide high power gain output power. These equipped with dual-stage depressed collector enhancing overall efficiency single collector. Furthermore, they rugged reliable design offering long-life service.
FEATURES
High Power Gain power gain typically level. Simple Cooling System tubes conduction-cooled, that cooling systems greatly simplified. Focusing tubes (Periodic Permanent Magnet) -focused, eliminating entirely focusing power supplies interlock circuits. Rugged Construction tubes designed rugged, therefore they suitable transportable systems. Long Life High Stability tubes employ advanced impregnated cathode with operating temperature long life. Microdischarge Free tubes carefully designed free from microdischarge electron long term operation, therefore they suitable digital communication service.
safe microwave tubes, refer document "Safety instructions personnel handling electron tubes" (ET0048EJVUM00)
information this document subject change without notice.
Document ET0215EJ3V0DS00 (3rd edition) Date Published August 1998 Printed Japan
1996
LD7235 SERIES
GENERAL CHARACTERISTICS
ELECTRICAL Frequency 26.5 28.6 27.5 30.0 30.0 31.3 Output Power Heater Voltage Heater Current 1.05 Type Cathode Indirectly heated, Impregnated Cathode Warm-up Time MECHANICAL Dimensions Outline Weight approx. Focusing Periodic Permanent Magnet Mounting Position Electrical Connections Flying Leads Connections Input Mates with UG-599/U Flange Output Mates with UG-599/U Flange Cooling Conduction
ABSOLUTE RATINGS (Note
ELECTRICAL Heater Voltage Heater Surge Current Heater Current Heater Warm-up Time Helix Voltage Helix Current Isolated Anode Type Anode Voltage Anode Current Single Collector Type Collector Voltage Collector Current Dual-stage Collector Type Collector Voltage-1 Collector Current-1 Collector Voltage-2 Collector Current-2 Cathode Current Drive Power Load VSWR ENVIRONMENTAL Heat Sink Temperature Ambient Temperature Storage Operation Min. Max. +110 +100 Unit Min. 12.0 Max. 13.0 11.0 1.25 Unit
LD7235 SERIES
TYPICAL OPERATION (Note
Unit Frequency Output Power Heater Voltage (Note Heater Current Helix Voltage Helix Current Isolated Anode Type Anode Voltage Anode Current Single Collector Type Collector Voltage Collector Current Dual-stage Collector Type Collector Voltage-1 Collector Current-1 Collector Voltage-2 Collector Current-2 Cathode Current Power Gain Gain Variation Gain Slope Order Intermodulation (two equal carriers, total) 0.15 0.005 -28.5 dB/60MHz dB/MHz deg./dB deg./dB 0.01 30.0 1.05 12.6
AM-PM Conversion
Note Absolute rating should exceeded under continuous transient conditions. single absolute rating limitation simultaneous operation more than absolute rating possible. Note tube body ground potential operation. Note voltages referred cathode potential except heater voltage. Note optimum operating parameters shown test performance sheet each tube. Note These characteristics operating values changed result additional information product improvement. should consulted before using this information equipment design. This data sheet should referred contractual specification.
LD7235 SERIES
LD7235 SERIES OUTLINE (Unit
Flying Leads 7±0.5
Input UG-599/U (No.4-40 UNC-2B Threaded Holes)
69.5
±0.5
Output UG-599/U (No.4-40 UNC-2B Threaded Holes)
10.9
Thru
±0.5
±0.5 ±0.5
±0.5
Lead Color Brown Yellow Blue Black White
Lead Connections Heater Heater-Cathode Anode Helix Collector-1 Collector-2
type without isolated anode, blue lead line will provided. single collector type, white lead line will provided.
LD7235 SERIES
LD7235 SERIES
part this document copied reproduced form means without prior written consent Corporation. Corporation assumes responsibility errors which appear this document. Corporation does assume liability infringement patents, copyrights other intellectual property rights third parties arising from device described herein other liability arising from such device. license, either express, implied otherwise, granted under patents, copyrights other intellectual property rights Corporation others. While Corporation been making continuous effort enhance reliability electronic components, possibility defects cannot eliminated entirely. minimize risks damage injury persons property arising from defect electronic component, customers must incorporate sufficient safety measures design, such redundancy, fire-containment, anti-failure features. devices classified into following three quality grades: "Standard", "Special", "Specific". Specific quality grade applies only devices developed based customer designated "quality assurance program" specific application. recommended applications device depend quality grade, indicated below. Customers must check quality grade each device before using particular application. Standard: Computers, office equipment, communications equipment, test measurement equipment, audio visual equipment, home electronic appliances, machine tools, personal electronic equipment industrial robots Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment medical equipment (not specifically designed life support) Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems medical equipment life support, etc. quality grade devices "Standard" unless otherwise specified NEC's Data Sheets Data Books. customers intend devices applications other than those specified Standard quality grade, they should contact sales representative advance. Anti-radioactive design implemented this product.

LD7235 SERIES GHz, CONDUCTION COOLING, HIGH POWER GAIN GENER

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