PET3CW10000H3
Drop-in equivalent of 3CW10000H3
Water Cooled Triode For Industrial RF Heating
Water Cooled Triode For Industrial RF Heating
- Power Triode Tube Valve
- Output Power: 18 kW (CW mode)
- Anode voltage: 10 kV max
- Anode dissipation: 10 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]
Data Sheet of PET3CW10000H3
PET3CW100000H3 (equivalent of 3CW100000H3) is a water-cooled, ceramic-metal power triode with a robust mesh filament, for use in industrial radio-frequency heating
Electrical Characteristics
Filament Thoriated tungsten
Filament voltage (see note 1) 7.5 V
Filament current 75 A
Surge Filament current (peak) (see note 2) 375 A
Filament cold resistance 11.8 mΩ
Peak usable cathode current 20 A
Amplification factor 20
Inter – electrode capacitances:
Grid to anode 27 pF
Grid to filament 54 pF
Anode to filament 1.8 pF
Mechanical Characteristics
Connections Filament leads and grid contact flanges
Operating position . vertical, either way up
Maximum operating temperature 250 O C
Maximum dimensions see outline
Net weight 4 kg (8.8 pounds) approx
Accessories
Water coupling, supplied with PET3CW10000H3 CWPA323A
Thermal fuse available for PET3CW10000H3 PA85E
Cathode connector WPA830
For frequencies above 2MHz, CWPA830 should be used in conjunction with a strip connection to provide a low inductance cathode return.
Cooling
Anode is cooled by circulating water through the removable anode water jacket. The table below 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 the 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 PET3CW100000H3 (equivalent of 3CW100000H3)
Anode Water Pressure
Dissipation Flow Drop
(kW) l/min (psi)
5 10 2.2
7.5 12 2.3
10 13 2.5
15 15 3.0
The values given allow for maximum filament and grid dissipation in addition to the anode dissipation shown.
Radio Frequency Oscillator For Industrial Service
(Class C Conditions, One Tube)
Maximum Ratings (Absolute Values)
Frequency 90 MHz max
Anode voltage d.c 10 kV max
Anode current d.c. (see note 3) 3.0 A max
Anode input power 25 kW max
Anode dissipation 5 kW max
Grid voltage d.c –1000 V max
Grid current d.c (see note 4) 0.5 A max
Grid dissipation 150 W max
Cathode current d.c 4.0 A max
Typical Operating Conditions of PET3CW100000H3 (equivalent of 3CW100000H3)
Frequency 30 30 MHz
Anode voltage d.c 7.0 9.0 kV
Anode current d.c 2.65 2.52 A
Anode dissipation 4.1 4.1 kW
Grid voltage d.c –700 –900 V
Grid resistor 3650 4900 Ω
Grid current d.c 192 184 mA
Grid dissipation 44 42 W
Drive power 179 208 W
Anode input power 18.6 22.7 kW
Anode output power 14.5 18.6 kW
Output power less drive 14.3 18.4
NOTES
Health and Safety Hazards
Download Data Sheet of PET3CW10000H3 (Equivalent of 3CW10000H3)
Electrical Characteristics
Filament Thoriated tungsten
Filament voltage (see note 1) 7.5 V
Filament current 75 A
Surge Filament current (peak) (see note 2) 375 A
Filament cold resistance 11.8 mΩ
Peak usable cathode current 20 A
Amplification factor 20
Inter – electrode capacitances:
Grid to anode 27 pF
Grid to filament 54 pF
Anode to filament 1.8 pF
Mechanical Characteristics
Connections Filament leads and grid contact flanges
Operating position . vertical, either way up
Maximum operating temperature 250 O C
Maximum dimensions see outline
Net weight 4 kg (8.8 pounds) approx
Accessories
Water coupling, supplied with PET3CW10000H3 CWPA323A
Thermal fuse available for PET3CW10000H3 PA85E
Cathode connector WPA830
For frequencies above 2MHz, CWPA830 should be used in conjunction with a strip connection to provide a low inductance cathode return.
Cooling
Anode is cooled by circulating water through the removable anode water jacket. The table below 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 the 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 PET3CW100000H3 (equivalent of 3CW100000H3)
Anode Water Pressure
Dissipation Flow Drop
(kW) l/min (psi)
5 10 2.2
7.5 12 2.3
10 13 2.5
15 15 3.0
The values given allow for maximum filament and grid dissipation in addition to the anode dissipation shown.
Radio Frequency Oscillator For Industrial Service
(Class C Conditions, One Tube)
Maximum Ratings (Absolute Values)
Frequency 90 MHz max
Anode voltage d.c 10 kV max
Anode current d.c. (see note 3) 3.0 A max
Anode input power 25 kW max
Anode dissipation 5 kW max
Grid voltage d.c –1000 V max
Grid current d.c (see note 4) 0.5 A max
Grid dissipation 150 W max
Cathode current d.c 4.0 A max
Typical Operating Conditions of PET3CW100000H3 (equivalent of 3CW100000H3)
Frequency 30 30 MHz
Anode voltage d.c 7.0 9.0 kV
Anode current d.c 2.65 2.52 A
Anode dissipation 4.1 4.1 kW
Grid voltage d.c –700 –900 V
Grid resistor 3650 4900 Ω
Grid current d.c 192 184 mA
Grid dissipation 44 42 W
Drive power 179 208 W
Anode input power 18.6 22.7 kW
Anode output power 14.5 18.6 kW
Output power less drive 14.3 18.4
NOTES
- The filament voltage measured at the tube should be 7.5 V ± 5% for satisfactory performance, maximum life is obtained at –5% (7.1 V).
- The filament current must not exceed 375 A, even momentarily, at any time.
- 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 service). Spark gaps should be connected between anode and ground, to protect the tube from voltage transients under fault conditions.
- The grid current rating of 0.5 A of d.c. should not be exceed, except for very short periods during tuning. Normally, reasonable efficiency can be obtained with a grid current not exceeding 0.25 A. The grid circuit should include over-current protection, and d.c. grid current should be monitored continuously during industrial operation with varying loads.
Health and Safety Hazards
Download Data Sheet of PET3CW10000H3 (Equivalent of 3CW10000H3)