4CW100000E

High-power transmitting tetrode designed for RF amplification and modulation, with explicit pulse-modulator and regulator service ratings.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 15.5 V / 215 A

Description

Ceramic/metal water-cooled high-power tetrode for roughly 100–250 kW output applications, including RF amplification/oscillation, AF modulation, and high-power pulse-modulator service.

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: 15.5 V
Nominal heater current: 215 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

Max plate voltage: 40000 V
Max screen voltage: 2500 V
Max plate dissipation: 100000 W
Max screen dissipation: 1750 W
Max grid dissipation: 500 W
Max cathode current: 200 A

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
15.5 V
Heater/Filament Current
215 A
At 15.5 V nominal
Frequency for Maximum Ratings
108 MHz
Maximum Plate Voltage
40000 V
Highest published applicable absolute maximum
Maximum Screen Voltage
2500 V
Highest published applicable absolute maximum
Maximum Plate Dissipation
100000 W
Maximum Screen Dissipation
1750 W
Maximum Grid Dissipation
500 W
Maximum DC Plate Current
16 A
Peak Cathode Current
200 A
Pulse service
Pulse Plate Voltage
40000 V
PulseModulatorOrRegulator
Peak Cathode Current
200 A
PulseModulatorOrRegulator
Plate Dissipation During Pulse
1000000 W
PulseModulatorOrRegulator
Pulse Length
10 ms
PulseModulatorOrRegulator
Plate Voltage
18000 V
ClassAB;RFLinearAmplifier
Screen Voltage
1500 V
ClassAB;RFLinearAmplifier
Plate Output Power
168000 W
ClassAB;RFLinearAmplifier

Capacitance

Input Capacitance
370 pF
GroundedCathode
Output Capacitance
60 pF
GroundedCathode
Feedback Capacitance
1 pF
GroundedCathode
Input Capacitance
175 pF
GroundedGrid
Output Capacitance
60 pF
GroundedGrid
Feedback Capacitance
0.35 pF
GroundedGrid