CPI | 4CW50,000JCPI | multi CPI MULTI-PHASE COOLED POWER -

4CM2500KG powe cooled phase

The EIMAC 4CM2500KG is a ceramic/metal, multi- phase (water/vapor) cooled power tetrode de- signed for very high power rf service.

The 4CM2500KG has a high density thoriated tungsten mesh filament mounted on water-cooled supports. Pyrolytic graphite control and screen r tet grids are used to provide stability at high dissipa- r tion. The maximum anode dissipation rating is 4 ode 2500 kilowatts. cm

Large diameter control grid and cathode 2500kg terminals allow enhanced VHF performance. Fila- ment power and filament support cooling water are supplied through connectors which allow for quick tube installation and replacement.

Characteristics1 MECHANICAL: ELECTRICAL Net Weight 161 lb.; 73.0 kg Filament: Thoriated Tungsten Mesh Gross Weight 340 lbs; 154 kg Voltage 15.5 V Operating Position Vertical, Base Down Current at 15.5 Volts (nominal) 640 A Cooling Water and Forced Air Frequency of Maximu Ratings (CW) 130 MHz Maximum Overall Dimensions: Maximum Useful Frequency Over 200 MHz Length 18.75 in; 47.62 cm Amplification Factor, Average, Grid to Screen 6 Diameter 17.03 in; 43.26 cm Direct Interelectrode Capacitances (grounded cathode): Maximum Operating Temperature, Cin 1110 pF Envelope and Ceramic/Metal Seals 200°C Cout 150 pF Available Filament Power Connectors (not supplied with tube): Cgp 5.5 pF Filament Power/Water Connector (2 required): Direct Interelectrode Capacitances (grounded grid and screen)2 EIMAC SK-2310 Cin 385 pF Filament rf Connector (1 required): Cout 152 pF EIMAC SK-2315 Available Anode Cooling Water Connectors (not supplied with CPK 0.07 pF tube): Note: 2 connectors are required per tube EIMAC SK-2322 or EIMAC SK-2323 The values listed above represent specified limits for the product and are subject to change. The data should be used for basic information only. Formal, controlled specifications may be obtained from CPI for use in equipment design.

For information on this and other CPI products, visit our website at: www.cpii.com, or contact: CPI MPP, Eimac Operation, 607 Hansen Way, Palo Alto, CA 94303 telephone: 1(800) 414-8823. fax: (650) 592-9988 | email: [email protected] 1 2500kg 4CM2500KG cm

ode 4 r

RADIO FREQUENCY POWER TYPICAL OPERATION: r tet GROUNDED GRID - Drive Pulsed For long pulse fusion applications or CW Service ANODE-TO-GRID VOLTAGE 24 24 24 kVdc (Class AB or B) SCREEN-TO-GRID 1000 1500 2000 Vdc ABSOLUTE MAXIMUM RATINGS: BIAS VOLTAGE 490 500 540 Vdc ANODE CURRENT # 86.7 127 182 Adc DC ANODE VOLTAGE 27 kilovolts ANODE DISSIPATION 441 728 1550 kW DC SCREEN VOLTAGE 2.5 kilovolts SCREEN CURRENT # 5.8 7.5 4.1 Adc phase cooled powe ANODE CURRENT # 190 amperes SCREEN DISSIPATION 10.1 16.9 11.3 kW - ANODE DISSIPATION 2500 kilowatts GRID CURRENT # 10.3 10.0 6.1 Adc SCREEN DISSIPATION 20 kilowatts DRIVE POWER # 69.9 98.3 138.0 Kw GRID DISSIPATION 8.0 kilowatts ANODE LOAD IMPEDANCE 145 102 74 Ohms POWER OUTPUT #* 1700 2400 3500 kW CPI | multi # Average during the pulse * Approximate

APPLICATION

MECHANICAL employed to lift the tube and should be capable of safely supporting the full weight of the tube (up to 200 UNPACKING – To insure safety of the operator per- lbs with cooling water in the anode cooler) and should forming the work as well as preventing damage to the be operated with great care, especially when lower- tube, the following instructions should be followed: ing the tube onto a resting place or into equipment. It is 1) Open the crate by removing the lid, first unlock- recommended that a thick rubber mat or similar mate- ing the toggle bolts in 8 places. rial be used to absorb any undue shock that may occur 2) Attach a lifting hoist to the lifting loop and raise if the tube is to be placed temporarily on a hard surface. the tube slightly with mounting brackets attached to support the weight of the tube. STORAGE – If a tube is to be stored as a spare it should 3) Remove 8 bolts securing the mounting brackets be kept in its shipping crate and all water should be to the corners. purged from the anode cooler and from the filament sup- 4) Using the hoist, lift the tube and place on blocks ports/connectors. The anode cooler can be drained by or on a stand that supports its weight by the bottom inverting the tube. Water should be purged from the in- of the lower corona ring. ternal filament support structure by applying compressed air to one of the filament coolant ports and it is important 5) Remove the brackets from the tube. to note that pressure during this process must be limited to 2 Bar (29 psi). Under no circumstances should one at- HANDLING – This product contains a thoriated- tempt to use an unregulated air source for this procedure. tungsten filament, and although of a rugged mesh design, it is relatively fragile and a tube should be The tube should be stored with a portable VAC- protected from shock and vibration. A lifting eye is ION pump power supply connected to allow moni- available at the center of the anode cooler and should toring the vacuum tubes vacuum properties (see be used any time the tube is to be lifted for moving, section on VACION PUMP OPERATION for details.) etc. A lifting device such as a chain hoist may be 2 | multi CPI 4CM2500KG

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powe cooled phase

The original shipping crate with the shock mounts and hard- at 49°C. System pressure should not exceed 100 psi. ware should be retained in a dry place for future use such as moving a tube over a considerable distance. Instructions Anode Water Approx. Jacket on affixing the shock mounts is included with each tube. Dissipation Flow Press Drop (kW) (gpm) (psi) MOUNTING - The 4CM2500KG must be mounted vertical- ly, base down. The full weight of the tube should rest on r tet 2500 200 87 the screen-grid contact flange at the base of the tube, and r

all lifting of the tube should be done with the lifting eye 4 ode which is attached to the top of the anode cooling jacket. This cooling data is applicable to steady-state or tran- sient anode dissipation. At significantly reduced anode dissipation a lower flow rate may be permissible but using cm

ANODE COOLING - The anode is cooled by circulating 2500kg the maximum flow rate will protect the tube from unfore- high velocity water near the boiling point through the seen events that may cause surges in anode dissipation. structure. The inlet and outlet connections are clearly marked on top of the anode cooling jacket and it is im- portant they be connected only as indicated. Multiphase EIMAC Application Bulletin #16, WATER PURITY RE- cooling provides efficient removal of heat from the anode QUIREMENTS IN LIQUID COOLING SYSTEMS, is and assures additional capacity for temporary overloads. available on request and contains considerable de- tail on purity requirements and maintenance systems. Tube life can be seriously compromised by the condition of the cooling water. If it becomes contaminated, deposits BASE COOLING - The tube base requires air cooling with a will form on the inside of the water jacket causing localized minimum of 50 cfm of air at 50°C maximum at sea level, di- anode heating and eventual tube failure. To insure mini- rected toward the base seal areas from a general purpose mum electrolysis and power loss, the water resistance fan. It should be noted that temperatures of the ceramic/ at 25°C should always be one megohm per cubic centi- metal seals and the lower envelope areas are the control- meter or higher. The relative water resistance should be ling and final limiting factor. Temperature-sensitive paints periodically checked using readily available instruments. are available for use in checking temperatures in these areas before equipment design and air-cooling require- ments are finalized. EIMAC Application Bulletin AB-20, High velocity water flow is required to maintain high MEASURING TEMPERATURE OF POWER GRID TUBES, thermal efficiency; for this reason operation at low- covers this subject in detail and is available on request. er anode dissipation using lower flow rates than what is listed in the table on p.3 is not recommended. Water cooling of the filament and screen grid supports is also required, with inlet water temperature not to ex- Cooling water must be well filtered, with effective- ceed 49°C. Each of the two filament connectors include ness the equivalent of a 100-mesh screen, to elimi- both an inlet and an outlet line, with the proper connec- nate any solid material and avoid the possibility of tor for the inlet water shown on the tube outline draw- blockage of any cooling passages, as this would im- ing. Minimum flow for the F1 connector is 2.0 gpm, at mediately affect cooling efficiency and could produce an approximate pressure drop of 12 psi. Minimum flow localized anode overheating and failure of the tube. for the F2 connector is 4.0 gpm, at an approximate pres- sure drop of 50 psi. The screen grid cooling water is Minimum water flow requirements for the anode fed by means of 1/4-18 NPT tapped holes shown on the are shown in the table for an outlet water tempera- tube outline drawing, with a minimum flow of 2.0 gpm ture not to exceed 100°C and inlet water temperature required, at an approximate pressure drop of 12 psi. 3

4 CPI | multi-phase cooled power tetrode 4cm2500kg ERSTAT operating voltage to zero over a period of two minutes. two of overaperiod zero to voltage operating the decrease from be asmooth procedure should turnoff Normal current. operating normal exceed to twice lowed variable auto- (such as aVARIAC variable auto-transformer continuously and amotor-driven minutes, two of a period over level operating the to zero increased from smoothly be should voltage Filament be programmed. should off and turn- turn-on -Filament OPERATION FILAMENT KILL. HIGH VOLTAGE CAN that remember Always access open. doors with operating allow to bypassed be not must Interlock are opened. doors cess ac when discharge and to high voltage ply sup power the of circuits open primary to switches interlock with and terminals, circuits high-voltage the enclosures for include safety must Equipment ages. high volt with one no can come contact in that so ment equip all Design followed. precautions and operating be designed properly are deadly, must and equipment tube this usedwith HIGH VOLTAGE voltages -Normal simultaneously. can be attained ratings maximum solute ab of combinations that follow necessarily doesnot It itself. equipment the in variation or manufacturing tion, load varia variation, supply-voltage of usual conditions exceeded never by values will under any absolute the that so factor asafety by rating valuethat of absolute the low an average be design valueeach for determining rating of responsibility has the designer equipment the ratings exceed to absolute not In order may be impaired. tube the of serviceability which values outside are limited ratings These conditions. be exceeded to undernot any service and are system” “absolute are based the on service of type each for -Values shown RATINGS MAXIMUM ABSOLUTE ELECT COOLDOWN. TUBE FOR ALLOW TO REMOVED ARE AGES VOLT ALL AFTER MINUTES SEVERAL FOR MAINTAINED BE NORMALLY SHOULD AND FILAMENT, THE INCLUDING VOLTAGES, ELECTRODE OF TION APPLICA THE WITH SIMULTANEOUSLY OR BEFORE APPLIED BE MUST COOLING ALL 4CM2500 R ICAL ® ) is suggested. Inrush current must never be al must current Inrush suggested. ) is KG ® or aPOW ------filament structure at the base (stem). The primary func Theprimary the base at (stem). structure filament on the mounted permanently an pump andion magnet, VACION information. additional for Engineering Applications tion Opera EIMAC Products, Power CPI contact the user recommendedis it is anticipated power filament of cycling cycle on/off per filament day.If additional off/on one only with commercial designed is for tube service, This recommendations. specific for Engineering plications Ap Operation EIMAC Products, Power Microwave CPI Contact life. optimum assure and thereby resistance) (i.e., temperature filament proper be reduced maintain to should power filament the above 10 kilowatts sipations combined screen dis at and grid operated is tube this When operation. during could be which excited circuit filament the in resonance no exists that be ascertained should It operation. monopotential assure to bypassed be must filament the of sides Both temperatures. ating this cantube, as opercausethe excessive of filament the of out power bekeep exercised should any rf to Care supply. adc using filament special when precautions for Engineering Application Operation EIMAC ucts, Prod Power Microwave CPI acthan power. Contact rather dc with filaments the operate to is permissible it consideration, system an humis important Where meter. base, an using accurate tube rms-responding the be measured should at voltage Filament any reason. for present not is flow coolant if tube the to all power remove to necessary are interlocks system therefore filament the to is applied power while interrupted is flow water if sult damage Serious can harm and personal re p.5. on water regarding hot information cautionary See ceeds 100°C. never ex temperature water outlet the ensures that rate at a be maintained must flow anode coolingwater tion, In addi exceed doesnot 200°C. seal temperature metal the ceramic/ to ensure supports filament the on tained be main must flow air forced cooling and water periods, standby During is prohibited. nominal voltage) of less or 50% to voltage filament of (a reduction operation heat Black voltage. filament in increased asmall reduction by may be life filament service, standby of periods During ® PUMP OPERATION – The tube is supplied with supplied is with tube –The OPERATION PUMP ------CPI | multi4CW50,000J-phase cooled power tetrode 4cm2500kg 5 ------KG 4CM2500

mended themended pump operated be VACION continuouslyif possible, otherwise it should operated be periodically to the conditioncheck operated and of long as tube vacuum necessaryas of uAdc a reading 10 to lower. or achieve Figure 1 shows the relationship between tube vacu theum and ion current reading. Electrode voltages, filament including voltage,applied be should never if of a reading 50 uAdc is obtained. higher or the In event cannot improved be thatby op poor vacuum eration of the pump the VACION should user contact CPI Microwave Power Products, EIMAC Operation reviewand the details with Applications an Engineer. If the tetrode is grid-driven the therefore cathode (and the filament power supply)generally is referenced dc to groundpotential, that voltageisno bias other or voltage tois supplied the filament.VACIONIn case powthis the supplyer used with be may no isolation the and shield connectorand should on the grounded be cable VACION for reasons of electrical safety. If however the tetrode is to used in be grounded-grid (cathode-driven) con figurationas is in typical case of the then VHF, driverf toapplied the cathode/filament tube’s alsowillbe pres ent therefore and on the cable VACION good rf isolation must provided be to prevent rf power from flowing on this The cable. system must designer therefore incor porate rf filteringVACION on cable keep to the en rf ergy from into passing back the power VACION supply itsand metering circuit; ferrite around the chokes cable suitable. be may The filament supply shouldgroundbe voltage dc any as ed that from isapplied the filament toground will interfere withoperation. proper VACION ANODEOPERATION The- maximum dissipa anode tion rating of 2500 kilowatts should not exceeded be foreven very brief periods during setup tuning. or Anode current which flows anode voltages at high with no rf, interpulse as such idling current, must avoided be 1065-1(not with supplied the 4CM2500KG). For info see: http://www.kingselectronics.com/ type cable and RG- 58A/U Belden 8259 or for is recommended this connector. theIn of a tube case it a spare, held being as is recom ------The pump requires VACION a positive voltage to applied thecenter pinof approx. 3000 tooperate Vdc properly. for Inc. powerOne source VACION supplies is Varian, web site www.varianinc.comVarian’s several models has suitable be which may for use with the 4CM2500KG. Var At the tetrode is a coaxial attached cable to the VACION attached comes pump and to the tube delivered. as This a assy. includes cable that prevents the filament current from shorted being to ground. The end of the resis With operational an tube it the is recommended VAC-ION pump operated be full time moni be may so tube vacuum tored on a continuous basis. of A reading less than 10 uAdc normal, should as considered be indicating excel lent addition In tube vacuum. to other interlock circuitry it that is recommended full advantage taken be of the pump readoutVACION by providing circuitry which will shut down power all to the tube in the event the readout 50 currentexceeds uAdc. the In event shut a of such down, the pump should operated VACION be un alone recoverytil vacuum is indicated uAdc of by a reading 10 less,or at which point op the made be tube again may erational. If current the it rises vacuum again should be indicating as someconsidered as a circuit problem such tube element over-dissipating be may outgassing. and model 9290200ian (120 9290201 or volt line) ac (220 Volt suitable. appear line) Alternativesac power for Varian suppliesare: HeatWave Labs http://www.cathode.com/ Duniwayand Stockroomhttp://www.duniway.com/ tora solder that lug has is attachedusingof one the small screws to themagnet assy at the pump. VACION The other end of (type a female receptacle this has cable also MHV, designatedmil. UG-1016A/U Amphenol or type 27075). onto plug this type plug a male To receptacle UG-932/U, withalso supplied tube, is normally each used for mak extender an ing up of the cable required length. The other end ofthe extender goes to the cable VACION power supply; supplies require the a Kings Varian plug tion of this is to device allow monitoring of the condition of the shown as tube vacuum, ion by current an meter. 6 CPI | multi-phase cooled power tetrode 4cm2500kg while filament and screen voltages are present, since present, are and screenvoltages filament while never be removed must anode loading, or bias voltage voltage, Anode MHz. 60 than frequencies greater at tion screen dissipa be measured calculating in total must screen the of heating Rf age dc screen and the current. dc screen of volt product the simply is dissipation grid, screen ac no the applied to With kilowatts. 20 is pation screen dissi grid maximum -The OPERATION SCREEN load. driver total the of asmall is percentage emission, change grid the secondary load, in due to that so driver the One techniqueswamp is to condition. this tolerate to designed be must stage driver The become regenerative. to can causeamplifier current grid the negative values of Large decrease current. anet in grid in results power increasing drive when the high screen voltage cur with may oc This characteristic. resistance anegative hibit may ex grid control the conditions operating Under some voltage. guardexcessive against to cathode and the grid control the between be connected device should gap spark Aprotective voltage. grid and peak positive current dc grid of product equal the to approximately is exceeded. dissipation not is Grid rating this that insure to be taken measures should and protective 8 kilowatts is dissipation grid maximum -The OPERATION GRID parameters. operating of selection in assistance ed for be should contact Engineering Operation’s Application EIMAC Products, Power Microwave CPI necessary is under such conditions operation If tube. the in effects focusing of as aresult heating spot from failure quent anode lead chosen, damage to and voltages subse grid screen and the of can, as aresult conditions) “tuning” impedance and low power or lower service as regulator (such anode voltage high instantaneous of conditions under some anode values current low of with Operation information. more for p.7 on HAZARD X-RADIATION See tetrode. the of vicinity the in personnel to hazard tential po asignificant high and represents very is intensity X-Ray currents idling AB Class typical At generation. X-Ray causessignificant highat anodevoltage flowing Current period. “idling” the bias during grid control ing suchby means as or increas reducing screen voltage 4CM2500 KG ------sorb power supply stored energy if an occur. arc should if energy stored supply power sorb andhelp ab anode grid to the with series in be connected always should resistance maywhich occur. Aprotective damage caused internal any arc by from be protected must tube the andinterlock, coolant over-current interlock anode normal the to -In addition PROTECTION FAULT 3. on Page Recommendation Flow See flow. turbulent insure to sufficient be must flow ficiencythe water anode To be compromised. high coolingef not maintain will life tube is supplied, cooling and sufficient rating dissipation maximum listed the than are less watt-seconds the vided Pro pulse. the during watt-seconds the by are governed cooling and required dissipations element the duration, pulse the 10 than times more is period interpulse the where 10 than milliseconds, greater lengths pulse For long. very is period because interpulse chain apulse the to lost is as applied meaningduty of the In manyode. applications an the milliseconds for 200 about to grids case the of the milliseconds in afew from vary elements tube internal the of constants time thermal -The OPERATION PULSE requirement. this meeting towards effective alsovery is supply power a shunt-regulated provided; is er resistor an adequate bleed be usedwhen can only supply power Aseries-regulated excessively. rise to screen voltage grid the allowing without current reverse the absorb to sistor ableeder by re be provided must cathode screen to the from path Acurrent screen current. negative with istic character voltage arising exhibits screen supply power the if may flow high anode Dangerously current ditions. screen under on the all con be maintained will voltage operating correct the that so mind in characteristic this be designed with however, must screen circuit grid the cause damage procedures are followed; proper tube if not will Such operation emission. thermionic due to rent screen curgrid reverse cause to significant heating screen grid rf current sufficient in result will capabilities power VHF maximum its at 4CM2500KG the of Operation voltage. guardexcessive against to cathode and the screen grid gap between be connected device should spark- Aprotective condition. case in afault power of screen remove to be provided must circuitry protective be exceeded. Suitable will ratings screen dissipation ------CPI | multi-phase cooled power tetrode 4cm2500kg 7 ------KG 4CM2500

tact CPI Microwave Power Products, EIMAC Operation. someIn instances,a compromise between tube ef by way of modi impedance anode load and ficiency fyingthe output matching tuning will loading and mode oscillations prevent from circular occurring while a tube is deliveringoutput. peak Adjustment of both the voltage screen grid voltage and bias while testingoscillationsmode for prediisalso circular catedadjustments fine and in bothparameters will oftenmode oscillations. eliminate or reduce circular X-RADIATION HAZARD tubes - High-vacuum operating atvoltages kilovolts than higher 15 progres produce sively X-ray more radiation dangerous the as voltage is This increased. tube, operatingat its ratedvoltages and currents, is a potential X-ray source. Only limited shield ing is afforded by the the tube X- envelope. Moreover, radiation significantly increase level may with aging tube deterioration, gradual and paths to due leakage emis or sion characteristics they as affected are by the volt high X-rayage. shielding required be may sides of on all tubes operating at these voltages to provide protec adequate tion throughout the life of the tube. Periodic checks on the the X-ray and level should tube made, be should operated be never without If required shielding in place. there is question any to as the for need the or adequacy of shielding, expert an in this field contactedshouldbe to perform X-ray an survey. where cases In shielding found been tohas required, be operation of equipment with interlock switches cabinet doors and “cheated” in orderopen to better be to able locate equip an ment malfunction result can in serious X-ray exposure. RADIO-FREQUENCY RADIATION exposure - Avoid to strong rf fields even at relatively low Absorptionfrequency. ofrf energy tissue by human isdependent onfrequency. OSHA Safety (Occupational Health and Administration) thatrecommends prolonged exposure to rf radiation should limited be to milliwatts 10 centimeter. square per sive heating of the for One source ferrite occur. may the ferrite material is: National Magnetics Group, Inc. in Bethlehem, PA, USA. For furtherinformation con ------As noted GRID under OPERATION SCREEN and OPERA MODESUPPRESSION CONSIDERATIONS - High- performance high-power gridded the tubes including 4CM2500KGmodes of resonance natural have circular oscillation which must suppressed be during initial test The 4CM2500KG found been to has exhibit circular mode oscillations in both frequency S band and L band ranges. These modes must suppressed be externally to topreventthe damage tube to and provide stable opera plycapacitors infew a after microseconds the start of an is required.arc, The protection criteria supply is for each to short electrode each to ground, atone a time, through a switchvacuum a 6-inch and length of #30 AWG cop .per The wire willintact remain if criteria met. are TION, a protective should connected be spark gap from the control grid to ground from and the grid to screen ground. CPIApplication Bulletin #17 titled FAULT PROTECTION contains detail on request. considerable is available and LOAD VSWR - The VSWR load should monitored be and the detected used to signal operate the interlock system to removevoltage anode within 20 after milliseconds fault a the In occurs. of stored high case energy in the system, load mustcare taken be to avoid excessive return energy from the tube associateddamaging and circuit components. ing of equipment. The short stem compact structure of EIMACtubes providesfor suppres mode easyaccess siontechniques. It that isrecommended short pulsetest used toing be detect this to phenomenon and evaluate the effectiveness of the suppression used. techniques tion in the intended application. which One technique workedhas to suppress modes is using these circular ferrite tiles. The ferrite tiles cemented be can (using ElectricGeneral RTV-102 equivalent) or to the conical flatand surfacesdeck” “screen of at the base the of the tube. The size of the tiles to up be approximately can to 0.3 rectangular or 0.1 square and inch one thick. inch The ferrite must properties have that such it is not lossy at the fundamental frequency otherwise exces Anwhichelectronicpower will sup discharge crowbar, 8 CPI | multi-phase cooled power tetrode 4cm2500kg MAY BE AFFECTED. BE MAY PACEMAKERS CARDIAC frequencies. low relatively at even avoided,be should fields rf strong to –Exposure RADIATION RF burns. severe in resulting melting, and current high very can produce circuit asashort connectors or contacts filament with working when worn be not should asrings, such jewelry, -Personal CIRCUITS HIGH-CURRENT LOW-VOLTAGE KILL. CAN VOLTAGE HIGH the Remember deadly. can be voltages operating –Normal VOLTAGE HIGH nical data are taken in accordance with Standard RS-191. Standard accordance in are taken nical data with tech or specification test capacitance the in values shown The time. of overaperiod tubes of interchangeability good assures capacitancenal normally way tube this in inter equal, controlling being factors Other shielding. no special with 4CM2500KG, case the and of the in tube, on a cold is performed RS-191. test The Standard tion Associa Industries procedure described Electronic in test use a standard services and military industry the involved, key component as the tube, the values within capacitance actual To the wiring. associated control and terminals tube the chassiscapacitance from the to such as applications, stray many by variables most in capacitance influenced is atube of nal interelectrode inter actual -The CAPACITANCE INTERELECTRODE tions, could result in personnel. harm serious to could result tions, precau and practices operating safe of absence the in which, of one any hazards, following the involve may tube this of Operation products. such around careless be not Do injury. bodily serious possible against themselves protect to precautions take must tubes such utilizes which equipment or tubes power to exposed are or with work who persons All tubes. such of users and manufacturers equipment of responsibility the are tubes power to respect with practices operating safe and use Proper 4CM2500 KG OPERATING HAZARDS OPERATING - - - - neering; 607 Hansen Way, Palo Alto, CA 94304 USA. 94304 CA Hansen Way, Palo Alto, 607 neering; Engi Applications ATTN: Operation EIMAC ucts, Prod Power Microwave CPI to write here, listed those from different under conditions tube this erate op to desired is it -When APPLICATIONS SPECIAL the design. in significant capacitance highly are values if final layout approximate represent ing which mount with be taken should Measurements plication. ap any normal in exist will which and strays, variation capacitanceance the including values, for tube-to-tube make allow to cautioned is designer equipment The beryllium oxide (BeO). oxide beryllium no contains package and product this addition, In UN2910. articles, or package-instruments excepted material, radioactive for 173.424 49CFR in specified limitations and conditions the to conforms package and product -This COMPLIANCE MATERIAL removed. is power all after minutes several ° hundred several of can temperatures reach tubes of –Surfaces SURFACES HOT C and cause serious burns if touched for for touched if burns serious cause C and ------CPI | multi-phase cooled power tetrode 4cm2500kg KG

4CM2500 CPI | multi-phase cooled power tetrode 4cm2500kg CPI | multi-phase cooled power tetrode 4cm2500kg CPI | multi-phase cooled power tetrode 4cm2500kg CPI | multi-phase cooled power tetrode 4cm2500kg CPI | multi-phase cooled power tetrode 4cm2500kg 4CM2500 KG