Technical Data TD
Contents
1. TOSHIBA ELECTRON TUBES amp DEVICES CO LTD ELECTRON TUBE ENGINEERING DEPT 1385 SHIMOISHIGAMI OTAWARA SHI TOCHIGI KEN 324 8550 JAPAN 324 8550 1385 PHONE 0287 26 6577 FAX 0287 26 6061 0287 26 6577 FAX 0287 26 60612. Bus AXA
3. 2 COMMA 50 ET 55 00
4. 11 E77 4u C Kg h X X X
5. X Eg 2 60 V 10kV
6. 1245 LOE E Qr 24 REEDS OES 10
7. 1 2 3 4 5
8. 20kg 2 5
9. E 4 3 KN 1 1 2 3 2 1 2 LEF 3 1
10. 2 3 4 4 4 1 1 EAB 2 4 2 4 3 4 4 4 5 4 6 4 7 FE ae ac
11. ly 4 8 ye X 4 9 4 10
12. gt m HH 2 2 1
13. Qd X F X 10kV 20 30kV ETARE OFZ H E X X i Ol H 15 me S
14. damage the tube during mounting and demounting cause degrading the cooling effect When tightening terminals do not apply excessive force to the seat parts When connecting the tubes do not solder the leads nor attempt connection by winding bare wires to the terminal directly as this is very dangerous Contact Toshiba for the re quirements of the proper accessory parts such as sockets cap etc Maintenance and inspection We recommend that a record be kept for the operating conditions and that periodic maintenance checks be per formed to ensure stable operation and maximum operation life of the tube Record voltage current and electrode temperature and the cause of fluctuations if any Check the operation of the safety devices such as the overload relay water relay and air flow relay Confirm that the tube is mounted correctly Attention should also be paid to environmental conditions as high humidity and dust may damage the external insulation of the rube Storage When the tube is to be stored for a long time pack it in the box and store the box in a location with less vibration and low humidity oriented correctly as indicated Vibration may break the filament or the tube high humidity may damage the insulation of the valve base and cause poor electric contact Do not place the bare tube directly on the floor even when remounting the tube Transportation When the tube is to be transported pack it taking the original packing meth
15. IBA ELECTRON TUBES amp DEVICES CO LTD before proceeding with the design of equipment incorporating this product TOSHIBA ELECTRON TUBES amp DEVICES CO LTD 7T85RB RADIO FREQUENCY POWER AMPLIFIER AND OSCILLATOR Class Telegraphy C ABSOLUTE MAXIMUM RATINGS Continuous Intermittent Frequency Nm 110 110 MHz DC Plate Voltage ee 8 0 8 5 kV DC Grid Voltage 2000 2000 V DC Plate Current 1 0 1 2 A DC Grid Current 300 350 mA Plate Dissipat
16. RB mm OCT Operation and Handling Since the power consumption of transmitting tubes is generally high the voltages applied to each electrodes are high and the temperature of the electrodes rises accordingly Therefore incorrect operation may result in personal injury In addi tion it is difficult to determine the mechanical design strength of a transmitting tube from its external appearance Therefore all personnel who work with transmitting tubes must have a thorough understanding of correct operating pro cedures to prevent damage and must handle such tubes with extreme care System designers and personnel involved in performing work are responsible for ensuring worker safety 1 2 4 1 4 2 Applications and objectives 1 This product is intended for use in industrial equipment only It is not to be sold to or used by the general pub lic 2 This product is not designed or intended for use in combination with equipment in which malfunction or incor rect operation could lead to personal injury or death Such use is strictly prohibited 3 Refer to delivery specifications and engineering information issued by Toshiba to ensure safe operation of this product Ambient conditions 1 Store this product in a dry location relative humidity lt 60 Do not store this product a location where the temperature or humidity may change rapidly because cond
17. TOSHIBA Technical Data TD TRIODE 7T85RB Uses Industrial RF Ne Forced Air Cooling ee Frequency DC Plate Voltage 8 kV Max lt Plate Dissipation 2 5 kW Max Output Power Class C TOSHIBA 7T85RB GENERAL DATA ELECTRICAL Filament Thoriated Tungusten Voltage 6 3 V Current Seier meesten teso sains p 35 A Transconductance 0 35 5 mS Amplification Factor 24 91 Interelectrode Capacitances Grid Plate 13 pF Grid Filament GRE ER RE RE ii 15 pF Plate Filament NER 0 5 pF Frequency for Maximum Ratings TE 110 MHz MECHANICAL Overall Dimensions Length sauchewestenesencsusuauesesstuaaseuvestondvaeteeu
18. consequent health related problems The protective shield should be equipped with safety switches that shut down the high voltage power supply as soon as a door or panel is opened MProvide a safety device which prevents overcurrents due to shorting between the elec trode terminals etc Otherwise the connection cables may be heated and there is danger of fire Before performing preventive maintenance work turn OFF the power supply and perform grounding of each electrode to enable discharge Otherwise there is danger of death or injury due to electric shock HDo not solder connection lead wires directly to electrode terminals do not wind bare wires around electrode terminals The connection sections become hot and there is danger of fire electric shock and burns HDo not look into the waveguide the antenna the edge section of the co axial cable during operation Doing so may result in loss of eyesight due to exposure of the eyes to high frequency electro magnetic waves MPersons with cardiac pacemakers must not engage in manufacturing operation pre ventive maintenance of the equipment There is danger of abnormal operation of cardiac pacemakers HDo not lift or carry objects with a weight of more than 20 kg on your own Otherwise there is danger of back injury during lifting or injury due to falling During carrying in and installation use suitable lifting carrying in equipment or enlist the help of others whe
19. ensation may form on the surface of the product 2 filter should be used because accumulated dust will lead to deterioration of withstand voltage and may gen erate smoke or catch fire Precaution against incorrect or inappropriate operation 1 If this product is operated with an excessively high voltage or current X rays exceeding the standard may be generated Never use this product with a voltage or current exceeding the rated values 2 Prior consultation with Toshiba is required if this product is to be used under conditions other than those speci fied or if it is used for a new type of equipment 3 Before using this product determine whether or not it can be used for industrial heating applications 4 Only qualified engineers are permitted to use assemble maintain or check this product Other personnel prohibited from handling this product Precautions for operation and maintenance To ensure that the end user is aware of the safety precautions include the descriptions given in the safety precau tions in the operations manual provided with the equipment or take other appropriate actions High voltage The voltage applied to the electrodes of the power tube can exceed 10kV which is deadly and the equipment must be designed properly and operating precautions must be followed 1 Safety features to be incorporated in the design The following safety features should be incorporated in the system design The equipmen
20. ion 95 25 kW Grid Dissipation 130 150 W TYPICAL OPERATION Continuous Intermittent DC Plate Voltage SERRE ES 7 5 8 0 kV DC Plate Current 0 9 1 0 A DC Grid Current 200 950 mA Grid Resistance OY 4 5 4 5 kQ Plate Output Power DG 5 1 6 0 kW Note 1 Values for intermittent service are those for 10 seconds of operating time and 50 of duty Factor 10 50 7T85RB 500 ed Vea e Peto Tt Ty 2 400 a Be 4 300 747 C 200 100 6 We 7 a is E TINS A HLLLL 547 7 Hf fl ae 77 E A 0 1 2 2 4 5 6 7 8 Eb kV 7T85
21. n carrying heavy objects Do not drop the equipment or subject it to shocks The electron tube may break or explode and there is danger of injury Wear gloves and a protective mask during carrying in and installation When the electron tube is disposed of inform the disposal technicians of the danger of explo sion Do not touch the main body or peripheral parts during operation or immediately after operation is stopped There is danger of burns due to high temperatures TD Technical Data Engineering information
22. od Any other method may damage the tube Precaution for Safe Operation and Handling This operation manual describes the important information for preventing injury to personnel at manufactures employing this electron tube users and other personnel as well as for preventing property loss and for ensuring safe operation Fully understand the meanings of following indications and symbols before reading this manual and observe all precau tions for safe operation Keep this operation manual near the electron tube for immediate reference Description of indications WARNING a potentially hazardous situation which if not avoided could result in death or serious CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury or property damage 1 The phase minor or moderate injury means personal injury burn electrical shock etc that does not require inpa tient medical care 2 The term property damage means extended damage such as damage to facilities or materials Description of symbols Symbol QQ DON T Indicates prohibition something that you must do Details are described in words near the symbol 9 DO Indicates a compulsion something that you must do Details are described in words near the symbol Disclaimer Toshiba will not be held responsible for associated damage loss of business profits interru
23. ption of business etc resulting from the operation or non availability of the equipment Toshiba will not be held responsible for damage caused by natural calamities fires acts by the third parties accidents intentional or accidental mis operation and operation under abnormal conditions will not be held responsible for damage caused by malfunctions of the system in which this equip ment is incorporated Restrictions on use equipment is not designed or manufactured for use in combination with systems that include compo nents that directly affect the maintenance or loss of human life 1 Do not use this equipment for such sys tems 1 Systems equipment directly affecting the maintenance or loss of human life include the following Life support systems surgical equipment and diagnostic equipment this equipment is used in combination with systems 2 that are related to public safety or maintenance of essential public services special procedures 3 are required for the operation maintenance and manage ment of the systems Contact Toshiba in advance 2 Systems related to public safety or maintenance of essential public services include the following The main control systems of nuclear power plants safety protection systems for unclear facilities and other important systems for safety Mass transit and air traffic control systems 3 Special procedures refers to the development of safe
24. systems fool proof fail safe and advanced design etc close cooperation with Toshiba engineers Manufacturing installation and operation of the equipment The manufacturing installation and operation of systems which incorporate this equipment and transmit elec tromagnetic waves should be performed in compliance with all applicable regulations related to electromagnetic waves DON T DISASSEMBLE DON Ts DON Ts not disassemble modify or repair the equipment There is danger of irradiation fire electric shock or burns due to high frequency electromag netic wave MProvide a protective fence preventing contact with the high voltage section If you approach or touch the electrode section or lead wires while power is supplied there is danger of death or injury due to electric shock The protective fence should be equipped with safety switches that shut down the high voltage power supply as soon as a door or panel is opened Install the waveguide and output flange sections securely so as to prevent electromag netic wave leakage There is danger of irradiation fire or burns due to high frequency electromagnetic waves E Keep the area around the equipment free of flammable materials and keep the equipment free of dust Otherwise there is danger of fire MProvide an X ray protective shield if an X ray dose exceeding 77 4 C kg his output Otherwise there is danger of X ray exposure and the
25. t must be designed to prevent personnel from coming into contact with high circuit Interlock switches must be provided on access doors so that when these are opened for inspection or re placement of the tube power supply is turned off and high voltage capacitors are discharged The power supply cannot be turned on again unless the access boor is fully closed 2 Safety precautions for inspection and replacement to tube It is preferable to request that the system manufacturer send an engineer to inspect and replace the tube if this is not possible two or more qualified persons well trained in electrical work can perform the inspection and replacement In either case all power supplies must be turned off before beginning any service proce dure and parts being inspected or replaced must be grounded with aground bar High temperature Although a cooling system is used the electrode terminals are very hot both during and after operation Do not touch the tube just after turn off the power wait until the temperature decreases enough not to be dangerous 4 3 4 4 4 5 4 6 47 4 8 4 9 X ray radiation At voltage over 10kV X rays are generated X ray radiation at voltages up to 20kV 30kV is soft X ray with low penetration therefore it is absorbed and contained by the metal cabinet and by the glass bulb and metal parts of the tube However the intensity of the radiation could become high enough to leak to the outside adequate eval
26. tscousvinsevsnsaueveleacensssausesnenssnendosunsspecbexevessenes 930 mm Diameter Max RE RE SR ER RS NR SE SE 130 mm Mass 1 5 keg Mounting Position Vertical Plate Up or Down Cooling Plate Forced Air Cooling Minimum Air Flow 3 3 m min Minimum Static Pressure Loss E 17 mm Water Maximum Radiator Temperature 950 Maximum Incoming Air Temperature 45 Maximum temperature on Filament and Grid Seals 950 HR m Recommended Air Jacket 6 TOSHIBA VT 29032A The information contained herein is presented only as guide for the applications of our products No responsibility is assumed by TOSHIBA ELECTRON TUBES amp DEVICES CO LTD for any infringements of patents or other rights of the third parties which may result from its use No license is granted by imp ication or otherwise under any patent or patent rights of TOSHIBA ELECTRON TUBES amp DEVICES CO LTD or others The information contained herein may be changed without prior notice It is therefore advisable to contact TOSH
27. uation of X ray radiation for personal protection is necessary when designing the equipment Operating the tube When the tube is operated for the first time or after long intermission it is desirable to preheat for more than 15 minutes and to increase the high voltage gradually This operation is effective to improve and stabilize the vacuum level and ensure stable operation Mounting and demounting the tube The mechanical strength of power tubes is actually fragile even appear strong The internal structure of the electrodes especially Thoriated filament is easily affected by shock and vibration The mechanical strength of internal structure is same for ceramics envelope tube as that of glass envelope tube Therefore careful handling is necessary for installing these tubes When mounting or demounting tube in the socket of equipment special care should be taken not to subject the tube to excess shock and vibration such as trying to mount it into or remove it from a tight socket or by touching the tube while it is hot This tube should be held vertically by holding anode or anode flange and not to apply excess force to the termi nals etc Connecting the tube The lead wires connected to the tube must be protected from vibration and thermal expansion and cooling There must be no force applied directly to the sealed parts If the connecting socket is of the wrong size it may cause improper electric contact fall off during operation
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