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Power - Triode (over 1000V 100W) ·Triode

F6401

Specialized ITT pulse power triode for high-voltage RF pulse operation. Tens of amperes of peak cathode current, kilovolt plate capability, and operation to roughly 600 MHz suit demanding pulsed UHF transmitter systems.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4.25 V / 400 A

Description

Three-electrode pulse tube designed as an oscillator or amplifier in the UHF region, using water cooling on the anode and forced-air cooling on the bulb and seals.

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
4.25 V
Nominal heater current
400 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

Triode

X-ray radiationInterelectrode capacitances
Amplification factor
12
Max plate voltage
17000 V
Max plate dissipation
1000 W
Max cathode current
145 A

Published maximum ratings and characteristics audited; remaining numeric data retained densely in parameter table.

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 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • The F

    6401

    The F-6401 is a three-electrode tube designed for pulse operation as an

  • dissipating

    1 W

    dissipating 1 kilowatt of plate power, exclusive of filament excitation

  • Filament Voltage

    4.25 V

    Filament Voltage 4.25 volts

  • Filament Current

    400 A

    Filament Current 400 amperes

  • Filament Starting Current

    1000 A

    Filament Starting Current 1000 amperes

  • Filament Cold Resistance

    0.0018

    Filament Cold Resistance 0.0018 ohms

  • Peak Cathode Current

    145 A

    Peak Cathode Current 145 amperes

  • Grid-Plate

    25

    Grid-Plate 25 upf

  • Grid-Filament

    36

    Grid-Filament 36 puf

  • Plate-Filament

    2.1

    Plate-Filament 2.1 puf

  • Water Flow Required Anode (Note [1]

    1

    Water Flow Required Anode (Note 1) 1 min. gpm

  • Water Flow Required Anode (Note [2]

    1

    Water Flow Required Anode (Note 1) 1 min. gpm

  • Outlet Water Temperature

    70

    Outlet Water Temperature 70 wmax. °C

  • Maximum Glass Temperature

    180

    Maximum Glass Temperature 180°¢C

  • Published value

    2 W

    2 minutes after shutdown of filament power,

  • Note

    2

    Note 2: Air flow on the cathode and grid terminals ang

  • maximum temperature to

    180

    maximum temperature to 180°C.

  • PULSE

    -2

    PULSE -2-

  • D~C Plate Voltage

    17 kV

    D~C Plate Voltage 17 wax. kv

  • D-C Grid Voltage

    -2 kV

    D-C Grid Voltage -2 max, kv

  • D-C Grid Current (peak)

    5 A

    D-C Grid Current (peak) 5 max. amperes

  • Pulse Length

    15

    Pulse Length 15 wax. usec.

  • Plate Input

    1.6 kW

    Plate Input 1.6 max, kw

  • Plate Dissipation

    1 kW

    Plate Dissipation 1.0 max. kw

  • D-C Plate Voltage

    12 kV

    D-C Plate Voltage 12 kv

  • D-C Grid Voltage

    -5 kV

    D-C Grid Voltage -5 kv

  • D-C Plate Current éaverage)

    90 A

    D-C Plate Current éaverage) .090 amperes

  • D-C Grid Current (average)

    5 A

    D-C Grid Current (average) .005 amperes

  • Pulse Length

    15

    Pulse Length 15 usec,

  • Power Out (during Pulse)

    250 kW

    Power Out (during Pulse) 250 kw

  • Power Gain

    4 W

    Power Gain 4

  • ~

    1300 A

    ~1300 C " CURRENT | CIARAT EL‘TS’%IJN

  • NOT® #

    1

    NOT® #1: Grid ring must be capable

  • Plate L3 [1]

    7

    Plate L37%.007 g4, _.-1 r

  • Plate L3 [2]

    7

    Plate L37%.007 g4, _.-1 r

  • Plate L3 [3]

    -1

    Plate L37%.007 g4, _.-1 r

  • Published value

    4

    4 Filament Contact

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum full-rating frequency

    600 MHz

  • Cooling method

    water+air

  • Maximum pulse length

    15 us

  • Maximum duty factor

    0.002