PET3CW40000H3

Drop-in equivalent of 3CW40000H3
Water Cooled Triode For Industrial RF Heating
  • Power Triode Tube Valve
  • Output Power: 63 kW (CW mode)
  • Anode voltage: 12 kV max
  • Anode dissipation: 40 kW max
  • Frequency: 90 MHz max
  • Warranty: 12 months irrespective of number of hours in operation
  • Condition: Brand New
  • Price: Please call +91-9815309603 or email: [email protected]
Superior quality at a lower price with unmatched warranty of 52 weeks with no restriction on the number of hours of operation.
​Manufactured in India, in a world-class facility equipped with high quality machinery, materials and components sourced from reputed suppliers in America, Europe and Japan.

Data Sheet of 3CW40000H3 / PET3CW40000H3

3CW40000H3 is a water-cooled, ceramic-metal power triode with a robust mesh filament, for use in industrial radio-frequency heating.
 
Electrical Characteristics of 3CW40000H3
Filament            .           .           .           .           .           Thoriated tungsten
Filament voltage (see note 1)     .           .           .      10.0              V
Filament current            .           .           .           .        160              A
Surge Filament current (peak) (see note 2)         .  800              A
Filament cold resistance .           .           .           .      6.8            mΩ
Peak usable cathode current      .           .           .     50                A
Amplification factor       .           .           .           .        20
Inter – electrode capacitances:
Grid to anode    .           .           .           .           .         46               pF
Grid to filament             .           .           .           .        77               pF
Anode to filament          .           .           .           .       2.1              pF
 
Mechanical Characteristics of 3CW40000H3
Connections      .           .           .           .           .        Filament leads and grid contact flanges
Operating position         .           .           .           .      Vertical, either way up
Maximum operating temperature            .           . 250             OC
Maximum dimensions    .           .           .           .     See outline drawing
Net weight         .           .           .           .           .        5 kg (11 pounds) approx
 
Accessories
Water coupling, supplied with CW40000H3  .   WPA323A
Thermal fuse available for CW40000H3       .    PA85E
Cathode connector        .           .           .           .           PA830
 
For frequencies above 2MHz, CWPA830 should be used in conjunction with a strip connection to provide a low inductance cathode return.
 
Cooling
Anode of 3CW40000H3 is cooled by circulating water through the removable anode water jacket. The table lists the minimum water flow requirement for adequate anode cooling at various anode dissipation levels. In all cases, the outlet water temperature must not exceed 70 ⁰C nor should inlet water pressure exceed 60 psi. This table is based upon 20 ⁰C temperature rise.
 
Additional forced-air cooling of 3CW40000H3 tube base is also required to maintain ceramic-to-metal seal temperature below the 250 ⁰C maximum. Approximately 50 ft3/min of cooling air directed into the base structure will generally satisfy requirements.
 
Minimum Water Cooling Requirements of 3CW40000H3
   Anode                                                  Water                                                  Pressure
Dissipation                                              Flow                                                     Drop
(kW)                                                     l/min                                                     (psi)
30                                                         22                                                         4.5
35                                                         25                                                         5.0
40                                                         29                                                         5.5
45                                                         32                                                         6.0
 
Radio Frequency Oscillator For Industrial Service
(Class C conditions, one tube)
Maximum Ratings (Absolute Values)
Frequency         .           .           .           .           .   90          MHz max
Anode voltage d.c.        .           .           .           .  12             kV max
Anode current d.c.(see note 3)   .           .          8.0             A max
Anode input power        .           .           .            80           kW max
Anode dissipation         .           .           .             20           kW max
Grid voltage d.c.           .           .           .             –2000           V max
Grid current d.c. .(See note 4)     .           .        1.5            A max
Grid dissipation .           .           .           .            750           W max
Cathode current d.c.      .           .           .          10.0           A max
 
Typical Operating Conditions
Frequency         .           .           .           .           30             30             MHz
Anode voltage d.c.        .           .           .          7.5         10.0               kV
Anode current d.c.         .           .           .         8.0            7.9                A
Anode dissipation         .           .           .          9             14              kW
Grid voltage d.c.           .           .           .          - 800        –900               V
Grid resistor      .           .           .           .          570         1130              Ω
Grid current d.c. .           .           .           .        1.4           0.8             mA
Grid dissipation .           .           .           .         560          296              W
Drive power      .           .           .           .          1670         960              W
Anode input power        .           .           .        60             79             kW
Anode output power      .           .           .       51           65             kW
Output power less drive             .           .     49.3          64             kW
 
NOTES
  1. The filament voltage measured at the tube should be 10.0 V ± 5% for satisfactory performance, maximum life is obtained at -5% (9.5 V).
  2. The filament current of 3CW40000H3 must not exceed 800 A, even momentarily, at any time.
  3. Maximum anode voltage and current should not be applied simultaneously; this could result in excessive anode dissipation. The anode supply should include current-limiting resistors, and an over-current trip to remove anode voltage quickly in the event of an overload or arc (such load variations and faults are common in industrial services). Spark gaps should be connected between anode and ground, to protect the tube from voltage transients under fault conditions.
  4. The grid current rating of 1.5 A of d.c. should not be exceeded, except for very short periods during tuning. Normally, reasonable efficiency can be obtained with a grid current not exceeding 0.6 to 1.0 A. the grid circuit should include over-current protection, and d.c. grid current should be monitored continuously during industrial operation with varying loads.