CPI 4CX12-000A

The 4CX12,000A/8989 is intended for use in VHF
radio frequency applications. It features an internal mechanical structure which results in high RF
operating efficiency. Low RF losses in this structure permit operation at full ratings up to 220 MHz.
The 4CX12,000A/8989 has a gain of 18 dB in FM
broadcast service, and is also recommended for
RF linear amplifier service, and for VHF-TV linear
amplifier service. The anode is rated for 12 kilowatts of dissipation with forced air-cooling and
incorporates a new highly efficient cooler design,
which significantly reduces air pressure and flow
requirements and produces 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
Boiler
Length
Diameter
Weight
Maximum Ratings
Type of Service
Plate Voltage
(Volts)
Plate
Current
(Amps)
12,000 Watts
300 Watts
150 Watts
220 MHz
6.7
Thoriated Tungsten
6.5 Volts
120 Amps
Grounded Cathode
160.0 pf
18.5 pf
1.0 pf
Grounded Grid
70 pf
18.6 pf
0.1 pf
Forced Air
Special, Coaxial
SK-300A
--9.84 in; 24.99 cm
7.76 in; 19.71 cm
19.2 lb; 8.75 kg
T ypical Operation
Plate
Screen
Voltage Voltage
(Volts)
(Volts)
Plate
Current
(Amps)
Drive
Output
Power Power
(Watts) (kiloWatts)
C
RF amplifier, grid-driven
10,000
3.5
9,000
750
2.83
23
20.0
C
RF amplifier at 90.5 MHz
10,000
3.5
9,950
650
3.08
245
22.9
C
RF amplifier at 108.1 MHz
10,000
3.5
10,000
800
2.81
275
22.5
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 : powergrid@cpii.com
CPI | 4CX12,000A/ 8989
CPI | 4CW50,000J
4CX12,000A/8989