4CX5000A/8170

Is useful as:
  • An oscillator, amplifier, or modulator at frequencies up to 220 MHz
  • a Class AB audio amplifier
  • a screen-modulated radio-frequency amplifier

 


 

 

Description
Maximum Ratings
Tube Numbering System
Warranty

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Description

Plate Dissipation ( Max ) 5000 watts
Grid Dissipation ( Max ) 250 watts
Frequency for Max Ratings (CW) 75 watts
Cooling   Forced Air
Filament Thoriated Tungsten
     Voltage 7.5 volts
     Current 75 amperes
Capacitances ( Gnd. Cath. Connection )
     Input 115 pF
     Output 20.5 pF
     Feed-through .7 pF
Capacitances ( Gnd. Grid Connection )
     Input 53.0 pF
     Output 20.5 pF
     Feed-through .1 pF
Amplification Factor 4.5
Base Special, Coaxial
Recommended Air-System Socket SK-300A
Recommended Air-Chimney SK-306
Maximum Seal & Anode Core Temperature 250o C
Maximum Length 9.13 in / 231.80 mm
Maximum Diameter 4.94 in / 125.4 mm
Weight ( approximate ) 9.5 lb / 4.31 kg
Operating Position Vertical 

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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 7500* 3.0* 7500 500 2.8 150 16,000
C RF Amplifier Plate Modulated 5500 2.5 5000 500 1.4 25 5,800
C RF Amplifier Screen Modulated 7500 3.0 7500 350 1.1 11 3,550
AB RF Linear Amplifier ( two tubes ) 7500 4.0 7500 1250 1.9 - 10,000
AB AF Amplifier or Modulator ( two tubes ) 7500 4.0 7000 1250 3.7 - 17,500

* Derated values apply above 30 MHz to 220 MHz

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