CPI 4CX20-000C

The 4CX20,000C is recommended for use in audio
or RF applications. It features an internal structure having low RF losses, permitting operation
at full ratings to 110 MHz. This tube has a gain of
20 dB in FM broadcast service, with power output of 40kW. It is also recommended for RF linear
amplifier service. The anode is rated for 20 kW
of dissipation and incorporates a highly efficient
cooler with ripple fins, which significantly reduces
air pressure and flow requirements and produces
a low acoustical noise.
Class of Operation
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
Maximum Ratings
Type of Service
Plate Voltage
(Volts)
Plate
Current
(Amps)
20,000 Watts
450 Watts
200 Watts
110 MHz
6.7
Thoriated Tungsten
10.0 Volts
140 Amps
Grounded Cathode
193 pf
22.4 pf
0.6 pf
Grounded Grid
90 pf
22.9 pf
.08 pf
Forced Air
Special, Coaxial
SK-360
SK-326
--9.84 in; 249.90 mm
8.86 in; 225.04 mm
20.0 lb; 9.06 kg
T ypical Operation
Plate
Screen
Voltage Voltage
(Volts)
(Volts)
Plate
Current
(Amps)
Drive
Output
Power Power
(Watts) (kiloWatts)
C
RF power amplifier
12,500
5.0
9,000
900
4.01
26
28.2
C
RF power amplifier
12,500
5.0
11,600
1,000
4.35
400
40.0
AB1
AF amplifier or modulator
12,500
6.0
7,800
1,500
9.20
---
44.0
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 : 1(800) 414-8823. fax : (650) 592-9988 | email : [email protected]
CPI | 4CX20,000C
CPI | 4CW50,000J
4CX20,000C