4CM2500KG Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – RF power amplifier (grounded grid)

4CM2500KG/X-2274
The 4CM2500KG/X-2274 is a ceramic/metal, wa-
ter vapor cooled power tetrode designed for very
high powered RF service. The 4CM2500KG has
a high density thoriated tungsten mesh filament
mounted on water-cooled supports. Pyrolytic
graphite control and screen grids are used to pro-
vide the necessary stability and power dissipation
rating. The maximum anode dissipation rating
is 2500 kilowatts steady state. Large diameter
coaxial terminals are used for the control grid and
the RF cathode terminals. Filament power and
filament support cooling water connections are
made through two special connectors. Anode
cooling water connectors are made with available
hand tightened connectors.
Characteristics
Plate Dissipation (Max.)
Screen Dissipation (Max.)
Grid Dissipation (Max.)
Frequency for Max. rating (CW)
Max useful frequency (derated power)
Amplification Factor (grid to screen)
Gain
Efficiency
Filament/Cathode
Voltage
Current
Capacitance
Input
Output
Feedthrough
Capacitance
Input
Output
Feedthrough
Cooling
Base
Air Socket
Air Chimney
Boiler
Length
Diameter
Weight
2,800,000 Watts
20,000 Watts
8,000 Watts
80 MHz
210 MHz
6
13.5
67.4%
Thoriated Tungsten
15.5 Volts
675 Amps
Grounded Cathode
1150 pf
150 pf
5.0 pf
---
--- pf
--- pf
--- pf
Vapor and Forced Air
Special Coaxial
---
---
---
18.75 in; 476.20 mm
17.03 in; 432.60 mm
153.0 in 69.5 kg
Maximum Ratings
Typical Operation
Class of
Operation
AB
Type of Service
RF power amplifier (grounded grid)
Plate
Voltage
(Volts)
Plate
Current
(Amps)
27,000
200
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
24,000 2,000
173
124.0 2,800.00
The values listed above represent specified limits for the product and are subject to change. The data should be used for basic
information only. Formal, controlled specifications may be obtained from CPI for use in equipment design.
For information on this and other CPI products, visit our website at: www.cpii.com,
or contact: CPI MPP Division, Eimac Operations, 607 Hansen Way, Palo Alto, CA 94303
telephone: [phone]. fax: [phone] | email: [e-mail]