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

4CX20,000D/9015
The EIMAC 4CX20,000D/9015 is a ceramic/metal
VHF power tetrode intended for use as a RF ampli-
fier up to 110 MHz. It is particularly recommended
for use in the 88-108 MHz FM band. It features an
electromechanical structure which provides high
RF operating efficiency and low RF losses. The
4CX20,000D has a gain of up to 20 dB in FM broad-
cast service. The anode is rated for 20 kilowatts
of dissipation with forced-air cooling and incor-
porates 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
300 Watts
200 Watts
110 MHz
9.5
Thoriated Tungsten
7.5 Volts
145 Amps
Grounded Cathode
181 pf
18.7 pf
0.5 pf
Grounded Grid
76 pf
19.2 pf
.05 pf
Forced Air
Special, Coaxial
SK-360
SK-336
---
9.51 in; 24.17 cm
7.85 in; 19.95 cm
14.8 lb; 6.7 kg
Class of
Operation
C
Type of Service
RF power amplifier
Maximum Ratings
Typical Operation
Plate
Voltage
(Volts)
Plate
Current
(Amps)
12,500
5.0
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
11,600 1,300
3.7
500
35.5
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: [phone]. fax: [phone] | email: [e-mail]