4CX20-000B Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – RF power amplifier

4CX20,000B
The 4CX20,000B is intended for use as a Class C
RF power amplifier in AM broadcast service, for
use as a push-pull audio amplifier or modulator,
or as a pulse modulator. The anode is rated for 20
kW dissipation and incorporates a highly efficient
cooler of new design, which significantly reduces
air pressure and flow requirements and produces
low acoustical noise.
Characteristics
Plate Dissipation (Max.)
Screen Dissipation (Max.)
Grid Dissipation (Max.)
Frequency for Max. rating (CW)
Amplification Factor
Filament/Cathode
Voltage
Current
Capacitance
Input
Output
Feedthrough
Capacitance
Input
Output
Feedthrough
Cooling
Base
Air Socket
Air Chimney
Boiler
Length
Diameter
Weight
20,000 Watts
450 Watts
200 Watts
30 MHz
6.7
Thoriated Tungsten
10.0 Volts
140 Amps
Grounded Cathode
190 pf
23.5 pf
1.5 pf
Grounded Grid
8. pf
24.5 pf
0.2 pf
Forced Air
Special, Coaxial
SK-320
SK-326
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9.84 in; 249.90 mm
8.86 in; 225.04 mm
20.0 lb; 9.06 kg
Class of
Operation
C
C
AB1
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Maximum Ratings
Typical Operation
Type of Service
RF power amplifier
RF power amplifier plate modulated
AF amplifier or modulator (2 tubes)
Pulse modulator or regulator
Plate
Voltage
(Volts)
Plate
Current
(Amps)
12,000
5.0
10,000
5.0
12,500
6.0
35,000
60
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
9,000
900
4.01
26
28.2
7,800
750
4.60
35
29.0
7,800 1,500
9.2
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44.0
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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 Operation, 607 Hansen Way, Palo Alto, CA 94303
telephone: [phone]. fax: [phone] | email: [e-mail]