The 3CX20000A7 is a metal-ceramic sealed, coaxial forced air-cooled triode with a direct-heated thoriated tungsten cathode. It has a high amplification factor. The operating frequency is 110MHz, and grid dissipation power is 500W. It is mainly used in zero-bias Class B RF amplifiers or Class C power amplifiers and oscillators. The tube can obtain 20 times power gain when the grid is grounded.
Specifications:
Filament Voltage……6.3V
Filament Current……160A
Amplification Factor……200
Transconductance……11mA/V
Interelectrode Capacitances (Grounded-cathode)
Input……61pF Feedback……0.2pF Output……36Pf
Installation……upright
Cooling……forced air for core and anode
Weight……7.3kg
Temperature at anode shell and seals……250℃
Length……216mm
Diameter……210mm
Maximum ratings (class C industrial oscillation)
Anode Voltage……8kV
Anode Current……6A
Anode Dissipation……15Kw
Grid Dissipation……500W
Typical conditions
Filament Voltage……6.3kV
Anode Voltage……7kV
Anode Current……4.55A
Driving Power……2600W
Anode Dissipation……6.3kW
Effective Output Power……25.5kW
