Eimac Power Grid Tube Reference Data
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4CX250B/7203

The 4CX250B/7203 has a maximum plate dissipation rating of 250 watts and a maximum input power rating of 500 watts. The 4CX250B/7203 is designed to operate with a heater voltage of 6.0 volts.



Characteristics

Plate Dissipation (Max.)250 Watts
Screen Dissipation (Max.)12 Watts
Grid Dissipation (Max.)2 Watts
Frequency for Max. rating (CW)500 MHz
Amplification Factor5
Filament/CathodeOxide Coated
    Voltage
    Current
6.0 Volts
2.6 Amps
CapacitanceGrounded Cathode
    Input
    Output
    Feedthrough
15.7 pf
4.5 pf
.04 pf
CapacitanceGrounded Grid
    Input
    Output
    Feedthrough
13.0 pf
4.5 pf
.01 pf
CoolingForced Air
Base9 Pin Special
Air SocketSK-600A
Air ChimneySK-606
Boiler---
Length2.46 in; 62.50 mm
Diameter1.64 in; 41.70 mm
Weight4 oz; 113 gm


Maximum RatingsTypical Operation
Class
of
Operation
Type of ServicePlate Voltage (Volts)Plate current (Amps)Plate Voltage (Volts)Screen Voltage (Volts)Plate Current (Amps)Drive Power (Watts)Output Power (kiloWatts)
CRF Amplifier up to 175 MHz2,0000.252,000300.0252.90.390
CRF Amplifier Plate Modulated up to 175 MHz1,5000.201,5002500.201.70.235
AB1RF Linear Amplifier up to 175 MHz2,0000.252,0003500.25---0.300
AB1RF Linear Amplifier(AM Service) up to 175 MHz2,0000.252,0003500.15---0.65
AB1Af Amlifier or Modulator2,0000.252,0003500.50---0.600
Characteristics and Operating values are based on performance tests. Figures may change without notice as the result of additional data or product refinement. CPI Eimac Division should be consulted before using this information for final equipment design.

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Last page update 3/21/97 5:00:57 PM
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