4CW50000J

High-power ceramic/metal transmitting tetrode designed for RF power amplification, linear amplification, oscillation, modulation, broadcast, or related high-power service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 12 V / 220 A

Description

Ceramic/metal water-cooled power tetrode for 50–100 kW output service, recommended for Class-AB1 RF linear-amplifier operation.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 12 V
Nominal heater current: 220 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Amplification factor: 4.5
Max plate voltage: 17500 V
Max screen voltage: 2500 V
Max plate dissipation: 50000 W
Max screen dissipation: 1500 W
Max grid dissipation: 400 W

Published absolute maximum ratings promoted from the applicable service tables; pulse-service maxima are used only where explicitly noted in the tube note.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Heater/Filament Voltage
12 V
Heater/Filament Current
220 A
At 12.0 V nominal
Frequency for Maximum Ratings
110 MHz
Maximum Plate Voltage
17500 V
Highest published applicable absolute maximum
Maximum Screen Voltage
2500 V
Highest published applicable absolute maximum
Maximum Plate Dissipation
50000 W
Maximum Screen Dissipation
1500 W
Maximum Grid Dissipation
400 W
Maximum DC Plate Current
12 A
Plate Voltage
8300 V
ClassAB;RFLinearAmplifier
Screen Voltage
1500 V
ClassAB;RFLinearAmplifier
Plate Output Power
45000 W
ClassAB;RFLinearAmplifier

Characteristic

Grid-Screen Amplification Factor
4.5

Capacitance

Input Capacitance
310 pF
GroundedCathode
Output Capacitance
48 pF
GroundedCathode
Feedback Capacitance
1 pF
GroundedCathode
Input Capacitance
290 to 330 pF
GroundedCathode;EquipmentDesignRange
Output Capacitance
42 to 53 pF
GroundedCathode;EquipmentDesignRange
Feedback Capacitance
- to 1.5 pF
GroundedCathode;EquipmentDesignRange
Input Capacitance
113 to 137 pF
GroundedGrid;EquipmentDesignRange
Output Capacitance
45 to 55 pF
GroundedGrid;EquipmentDesignRange
Feedback Capacitance
- to 0.5 pF
GroundedGrid;EquipmentDesignRange