4cW25,000a
chaRacteRistics
Plate Dissipation (Max.)
Screen Dissipation (Max.)
Grid Dissipation (Max.)
Frequency for Max. rating (CW)
Amplification Factor
Filament/Cathode
Voltage
The 4CW25,000A is a tetrode intended for use in
audio or radio frequency applications. It is recom-
mended for RF linear power amplifier service for
television linear amplifier service, and as a switch
tube for pulsed regulator service.
25,000 Watts
450 Watts
20 Watts
110 MHz
4.5
Thoriated Tungsten
6.3 Volts
Current
160 Amps
Grounded Cathode
160 pf
Capacitance
Input
Output
24.5 pf
Feedthrough
Capacitance
Input
1.5 pf
Grounded Grid
67 pf
Output
25.5 pf
Feedthrough
Cooling
0.2 pf
Water and Forced Air
Special Coaxial
SK-300A
Base
Air Socket
Air Chimney
Boiler
---
---
Length
12.69 in; 322.00 mm
4.75 in; 121.00 mm
13.5 lb; 6.1 kg
Diameter
Weight
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typicalꢀOpeRatiOn
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pꢁꢂꢉꢆꢀꢀ
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Voꢁꢉꢂꢌꢆꢀ cꢋrrꢆꢊꢉꢀ
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(Voꢁꢉꢃ)ꢀ
10,000ꢀ
8,000ꢀ
(amꢅꢃ)ꢀ
5.0ꢀ
(Voꢁꢉꢃ)ꢀ
10,000ꢀ
8,000ꢀ
(Voꢁꢉꢃ)ꢀ
(amꢅꢃ)ꢀ (Wꢂꢉꢉꢃ)ꢀ (kꢇꢁoWꢂꢉꢉꢃ)
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ꢀ
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ꢀ
cꢀ
RFꢀꢂmꢅꢁꢇfiꢆrꢀꢀ
750ꢀ
4.5ꢀ
3.6ꢀ
4.2ꢀ
8.5ꢀ
220ꢀ
150ꢀ
---ꢀ
36.5
23.5
28.5
57.0
cꢀ
RFꢀꢂmꢅꢁꢇfiꢆrꢀꢅꢁꢂꢉꢆꢀmodꢋꢁꢂꢉꢆdꢀ
RFꢀꢁꢇꢊꢆꢂrꢀꢂmꢅꢁꢇfiꢆrꢀ
4.0ꢀ
750ꢀ
aB1ꢀ
aB1ꢀ
10,000ꢀ
10,000ꢀ
6.0ꢀ
10,000ꢀ
10,000ꢀ
1,500ꢀ
1,500ꢀ
aFꢀꢂmꢅꢁꢇfiꢆrꢀorꢀmodꢋꢁꢂꢉorꢀ
6.0ꢀ
---ꢀ
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 Operations, 607 Hansen Way, Palo Alto, CA 94303
telephone: 1(800) 414-8823. fax: (650) 592-9988 | email: powergrid@cpii.com