The 3CX15000A7 is a metal-ceramic sealed, forced air cooled triode with a thoriated tungsten carbide cathode and a high amplification factor. The operating frequency is 110MHz, the anode dissipation power is 15kW and grid dissipation 500w. It’s mainly used for zero-bias voltage Class B RF amplifiers or Class C amplifiers, and also grid-grounded FM amplifiers. When the grid is grounded, the tube can obtain a power gain of 20 times.
Specifications:
Filament Voltage……6.3V
Filament Current……160A
Amplification Factor……200
Interelectrode Capacitances (Grounded cathode)
Input……61pF Feedback……0.2pF Output……36Pf
Mounting……Upright, anode up or down
Cooling……forced air for core column and anode
Weight……5.5kg
Temperature at anode shell and seals……250℃
Maximum ratings:
DC Anode Voltage……8kV
DC Anode Current……6A
Anode Dissipation……15kw
Grid Dissipation……500W
Maximum Frequency (continuous wave)……110MHz
Typical conditions
(Cathode-driven class AB RF linear amplifier)
DC Anode Voltage……7000v
Zero Signal Anode Current……0.6A
Signal Anode Current……5A
Signal Grid Current……1A
Drive Resistance……32Ω
Resonant Load Resistance……745Ω
Signal Driving Power……1540w
Anode Output……24.2kw
(Cathode-driven class C RF amplifier, continuous wave or FM)
Anode Voltage……7kV
Anode Current……4.55A
Grid Voltage……-200V
Grid Current……1.06A
Drive Resistance……53Ω
Driving Power……2600w
Anode Dissipation…… 6.3kW
Effective Output Power……25.5kW
Anode Load Resistance……800Ω
