4CM500-000G Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – RF Power Amplifier, Plate Modulated AF Amplifier, Plated Modulated (2 tubes)

4CM500,000G
The 4CM500,000G is a ceramic/metal, multiphase
cooled (water/vapor) power tetrode designed to
be useed as an exact replacement for the Thom-
son TH-558. This tube has a thoriated tungsten
mesh filament and pyrolytic graphite grids which
provide high dissipation combined with low
secondary emission characteristics. Base coaxial
contact rings are provided for the filament, grid,
and screen terminals. These are forced air cooled.
Maximum anode dissipation is 500 kW steady
state with multiphase cooling.
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
500,000 Watts
8,000 Watts
3,000 Watts
50 MHz
4.4
Thoriated Tungsten
23.0 Volts
500 Amps
Grounded Cathode
1,195 pf
107.0 pf
6.3 pf
N/A
N/A
N/A
N/A
Water and Forced Air
Special Coaxial
N/A
N/A
N/A
25.7 in; 65.3 cm
12.6 in; 32.1 cm
150 lb; 70 kg

Maximum Ratings Typical Operation
Class of Type of Service Plate Plate Plate Screen Plate Drive Output
Operation
Voltage Current
Voltage Voltage Current Power Power

(Volts) (Amps)
(Volts) (Volts) (Amps) (Watts) (kiloWatts)
C
RF Power Amplifier, Plate Modulated
AB AF Amplifier, Plated Modulated (2 tubes)
15,000 75.0
15,000 75.0
12,500 1,000
54
3,000 550
12,000 1,250
78
---
660
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 MPP products, visit our website at: www.cpii.com,
or contact: CPI Microwave Products Division, Eimac Operation,607 Hansen Way, Palo Alto, CA 94303
telephone: [phone]. fax: [phone] | email: [e-mail]