Description
The ITK12-1 is a RF power triode designed specifically for industrial applications. This tube uses a coaxial design and metal-ceramic technology. This triode may be operated in CW or pulse modes. For operation in pulse mode, the parameters depend on each equipment characteristics. Contact us for specific information. The ITK12-1 is a water cooled triode.
Electrical characteristics of ITK12-1
Filament thoriated tungsten
Filament voltage (+5%, -10%) (see note 1) 5.8 V
Filament current 145 A
Surge current (maximum) 600 A
Cold resistance 5 mΩ
Capacitances:
Grid to Anode 21 pF
Grid to Cathode 55 pF
Cathode to Anode (see note 2) 1 pF
Amplification factor 22 (approx.)
Transconductance (Va: 10 kV, Ia: 4 A) 50 mA/V (approx.)
Mechanical characteristics of ITK12-1
Operating position vertical, anode up or down
Weight 3.1 kg (6.8 lbs) approx.
Dimensions see outline drawing
Maximum ratings of ITK12-1
Frequency (see note 3) 120 MHz
Anode voltage:
Up to 30 MHz 12 kV
From 30 to 60 MHz 9 kV
From 60 to 90 MHz 7 kV
From 90 to 120 MHz 6 kV
Control grid voltage -1500 V
Anode current 5.5 A
Control grid current:
Control grid current (at full load) 0.8 A
Control grid current (at no load) 1.5 A
Peak cathode current, CW 28 A
Anode dissipation:
Industrial cooling water 13 kW
Distilled or deionized water 15 kW
Grid dissipation:
Up to 30 MHz 350 W
From 30 to 60 MHz 320 W
From 60 to 90 MHz 300 W
From 90 to 120 MHz 280 W
Grid resistance (tube non conducting) 10 KΩ
Cooling of ITK12-1
Anode cooling Water
Cooling water flow and pressure gradient see cooling curves
Temperature at outlet (industrial water) 60 °C max.
Cooling water inlet pressure 5 bar max.
Temperature at any point on tube envelope 220 °C max.
Air flow on filament head 0.5 m3/min
Typical operation of ITK12-1 (see note 4)
Class C RF oscillator for industrial applications
| Frequency | 30 | 30 MHz |
| Anode voltage | 10 | 8 kV |
| Grid bias | -650 | -560 V |
| Grid voltage | 1050 | 945 V |
| Anode current | 5.3 | 4.8 A |
| Grid current, on load | 0.69 | 0.76 A |
| Anode input power | 53 | 38.4 kW |
| Anode output power | 40 | 29 kW |
| Anode dissipation | 12 | 8.6 kW |
| Grid dissipation | 240 | 260 W |
| Grid resistance | 1000 | 740 Ω |
| Feedback ratio | 11.7 | 13.1 % |
| Oscillator efficiency | 75.5 | 76 % |
Note:
1. At frequencies above 50 MHz, the filament voltage of ITK12-1 is reduced so that the ratio of filament voltage to current becomes the same as that without an anode voltage.
2. Measured with a 40 x 40 cm shielding plate attached to the grid plate.
3. Limited conditions above 30 MHz. Please consult Pilani Electron Tubes & Devices.
4. Operation with higher frequencies on request.
