4cx40,000gM
chaRacteRistics
Plate Dissipation (Max.)
Screen Dissipation (Max.)
Grid Dissipation (Max.)
Frequency for Max. rating (CW)
Amplification Factor
Filament/Cathode
Voltage
The 4CX40,000GM is recommended for use in lin-
ear amplifier service. The anode is rated for 40 kW
of dissipation with forced-air cooling and incorpo-
rates a highly efficient cooler of new design.
40,000 Watts
1,500 Watts
1,000 Watts
50 MHz
8
Thoriated Tungsten
15.0 Volts
165 Amps
Grounded Cathode
447 pf
Current
Capacitance
Input
Output
36 pf
Feedthrough
1.5 pf
Capacitance
Grounded Grid
155 pf
Input
Output
37 pf
Feedthrough
.15 pf
Cooling
Forced Air
Special, Graduated
Rings
Base
Air Socket
Air Chimney
Boiler
---
---
---
Length
11.70 in; 29.72 cm
10.06 in; 25.55 cm
55 lb; 25.55 kg
Diameter
Weight
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Voꢁꢉꢂꢌꢆꢀ cꢋrrꢆꢊꢉꢀ
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(Voꢁꢉꢃ)ꢀ
14,000ꢀ
14,000ꢀ
(amꢅꢃ)ꢀ
10.0ꢀ
(Voꢁꢉꢃ)ꢀ
10,600ꢀ
10.000ꢀ
(Voꢁꢉꢃ)ꢀ
(amꢅꢃ)ꢀ (Wꢂꢉꢉꢃ)ꢀ (kꢇꢁoWꢂꢉꢉꢃ)
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cꢀ
RFꢀꢂmꢅꢁꢇfiꢆrꢀꢀ
800ꢀ
7.0ꢀ
5.5ꢀ
250ꢀ
---ꢀ
60.0
50.0
aB1ꢀ
RFꢀꢁꢇꢊꢆꢂrꢀꢂmꢅꢁꢇfiꢆrꢀ
15.0ꢀ
1,400ꢀ
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.
Forꢀꢇꢊformꢂꢉꢇoꢊꢀon this and other CPI products, visit our website at:ꢀwww.ꢈꢅꢇꢇ.ꢈom,
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