4CW25,000A   

Intended for use in:
  • audio or radio frequency applications.    
  • RF linear power amplifier service for television  
  • switch tube for pulsed regulator service

 

Description
Maximum Ratings
Tube Numbering System
Warranty

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Description

Plate Dissipation ( Max ) 25,00 watts
Screen Disspation ( Max.) 450 watts
Grid Dissipation ( Max ) 200 watts
Frequency for Max Ratings (CW) 110 MHz
Cooling Water and Forced Air
Filament Thoriated Tungsten
     Voltage 6.3 volts
     Current 160 amperes
Capacitances ( Gnd. Cath. Connection )
     Input 160 pF
     Output 24.5 pF
     Feed-through 1.5 pF
Capacitances ( Gnd. Grid Connection )
     Input 67 pF
     Output 25.5 pF
     Feed-through .2 pF
Amplification Factor 4.5
Base Special, Coaxial
Recommended Air-System Socket SK-300A
Maximum Seal & Anode Core Temperature 250o C
Maximum Length 12.69 in /  322.00 mm
Maximum Diameter 4.75 in / 121.00 mm
Weight ( approximate ) 13.5 lb / 6.1 kg
Operating Position Vertical, base up or down 

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Maximum Ratings Typical Operation
Class of Operation Type of Sevice Plate Voltage (volts) Plate Current (amps) Plate Voltage (volts) Screen Voltage (volts) Plate Current (amps) Drive Power (watts) Output Power (watts)
C RF Amplifier   10,000 5.0 10,000 750 4.5 220 36,500
C RF Amplifier Plate Modulated 8,000 4.0 8,000 750 3.6 150 23,500
AB RF Linear Amplifier 10,000 6.0 10,000 1500 4.2 - 28,500
AB AF Amplifier or Modulator ( two tubes ) 10,000 6.0 10,000 1500 8.5 - 57,000

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