Description
The RS3080CJ is a RF power triode designed for dielectric heating 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 RS3080CJ is a water cooled triode.
Electrical characteristics of RS3080CJ
Cathode Filament thoriated tungsten
Filament voltage (+ 5 %, – 10 %) 11 V
Filament current 205 A
Surge current (maximum) 615 A
Capacitances:
Grid to Anode: 46 pF
Grid to Cathode: 106 pF
Cathode to Anode (see note 2): 3 pF
Amplification factor: 19
Transconductance (Va: 4 kV, Ia: 3 A): 60 mA/V approx.
Mechanical characteristics of RS3080CJ
Operating position: vertical, anode up or down
Weight: 8 kg (17.6 lbs) approx.
Dimensions: see outline drawing
Maximum ratings of RS3080CJ
Frequency: 30 MHz
Anode voltage: 14 kV
Control grid voltage: -1.5 kV
Control grid current:
On load, CW: 2.3 A
Off load, CW: 2.6 A
Peak cathode current, CW: 85 A
Anode dissipation: 60 kW
Grid dissipation: 1.25 kW
Grid resistance (at blocked tube): 8 KΩ
Typical Operation of RS3080CJ (Class C RF oscillator for industrial applications)
| Frequency | <30 MHz |
| Anode voltage | 12 kV |
| Control grid bias | -1055 V |
| RF Control grid voltage | 1555 V |
| Anode current | 12.7 A |
| Control grid current | 2.2 A |
| Anode input power | 151.9 kW |
| Anode output power | 106 kW |
| Anode dissipation | 35 kW |
| Control grid dissipation | 942 W |
| Grid resistance | 485 Ω |
| Feedback ratio | 14.8 % |
| Oscillator efficiency | 74.9 % |
Operations at higher frequencies available upon request
Cooling of RS3080CJ
Anode cooling: Water
Cooling water flow and pressure gradient: see cooling curves
Cooling water inlet pressure: 5 bar max
Water inlet temperature: 35 °C max
Temperature at any point on tube envelope: 220 °C max
Air flow on tube terminal side: 3 m³/min
