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

F5918A

Water-cooled high-power transmitting triode for RF amplification, oscillation, and Class B modulation. Approximately 70 kW plate dissipation and 17.5 kV capability provide enormous continuous power for major fixed transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
11 V / 285 A

Description

Three-electrode high-power tube for RF amplifier, oscillator and Class B modulator service with a 70 kW water-cooled anode.

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
11 V
Nominal heater current
285 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
37
Max plate voltage
17500 V
Max plate dissipation
70000 W
Max cathode current
100 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

  • Published value

    70 W

    70 Kilowatts Plate Dissipation

  • dissipating

    70

    dissipating 70 kilowatts. The cathode is a thoriated

  • tungsten filament. Maximum ratings apply up to

    22

    tungsten filament. Maximum ratings apply up to 22

  • ) Filament Current

    285 A

    ) Filament Current 285 Amperes

  • ) Filament Starting Current

    1000 mA

    ) Filament Starting Current 1000 Amperes max.

  • p Filament Cold Resistance

    5

    p Filament Cold Resistance .005 Ohms

  • ) Peak Cathode Current

    100 A

    ) Peak Cathode Current 100 Amperes

  • Grid-Plate

    345

    Grid-Plate 345 puf

  • Grid-Filament

    75

    Grid-Filament 75 upf

  • Plate-Filament

    2.4

    Plate-Filament 2.4 puf

  • Water Flow on Anode

    30

    Water Flow on Anode 30 GPM

  • Temperature

    70

    Temperature 70° C

  • Maximum Glass Temperature

    150

    Maximum Glass Temperature 150° C

  • FEDERAL POWER TRIODE The F

    5918 W

    FEDERAL POWER TRIODE The F-5918-A has given proven ser-

  • Type F [1]

    5918 kW

    Type F-5918-A vice in 200 KW plate modulated

  • Type F [2]

    200 kW

    Type F-5918-A vice in 200 KW plate modulated

  • Published value

    70 W

    70 Kilowatts Plate Dissipation short-wave transmitters.

  • DC Plate Voltage

    17500 V

    DC Plate Voltage 17,500 Volts Maximum Ratings, Absolute Values

  • Maximum Signal DC Plate Currentt [1]

    15 V

    Maximum Signal DC Plate Currentt 15 A.mperes DC Plate Voltage 14,000 Volts

  • Maximum Signal DC Plate Currentt [2]

    14000 V

    Maximum Signal DC Plate Currentt 15 A.mperes DC Plate Voltage 14,000 Volts

  • Maximum Signal Plate Inputt [1]

    175 V

    Maximum Signal Plate Inputt 175 Kilowatts DC Grid Voltage —3.000 Volts

  • Maximum Signal Plate Inputt [2]

    -3 V

    Maximum Signal Plate Inputt 175 Kilowatts DC Grid Voltage —3.000 Volts

  • Plate Dissipationt [1]

    70 A

    Plate Dissipationt 70 Kilowatts DC Plate Current 12 Amperes

  • Plate Dissipationt [2]

    12 A

    Plate Dissipationt 70 Kilowatts DC Plate Current 12 Amperes

  • DC Grid Current

    2 A

    DC Grid Current 2 Amperes

  • Typical Operation Plate Input

    165

    Typical Operation Plate Input 165 Kilowatts

  • {Unless otherwise specified, values are for two tubes) Plate Dissipation

    47 W

    {Unless otherwise specified, values are for two tubes) Plate Dissipation 47 Kilowatts

  • DC Plate Yoltage

    14000

    DC Plate Yoltage 14,000 Volts Typical O "

  • DC Grid Voltage

    -300 V

    DC Grid Voltage —300 Volts P P

  • Peak A-F Grid-to-Grid Voltage [1]

    1600 V

    Peak A-F Grid-to-Grid Voltage 1,600 Volts DC Plate Voltage 14,000 Volts

  • Peak A-F Grid-to-Grid Voltage [2]

    14000 V

    Peak A-F Grid-to-Grid Voltage 1,600 Volts DC Plate Voltage 14,000 Volts

  • DC Grid Voltage —

    800 V

    . DC Grid Voltage — 800 Volts

  • Zero Signal DC Plate Current [1]

    2 V

    Zero Signal DC Plate Current 2 Amperes Peak R-F Grid Voltage 1550 Volts

  • Zero Signal DC Plate Current [2]

    1550 V

    Zero Signal DC Plate Current 2 Amperes Peak R-F Grid Voltage 1550 Volts

  • Maximum Signal DC Plate Current [1]

    16 mA

    Maximum Signal DC Plate Current 16 Amperes DC Plate Current ' 10 Amperes

  • Maximum Signal DC Plate Current [2]

    10 mA

    Maximum Signal DC Plate Current 16 Amperes DC Plate Current ' 10 Amperes

  • Effective Load Resistance, Plate DC Grid Current

    1.4 A

    Effective Load Resistance, Plate DC Grid Current 1.4 Amperes

  • to Plate [1]

    2250 W

    to Plate 2,250 Ohms Driving Power, approximate 2 Kilowatts

  • to Plate [2]

    2 W

    to Plate 2,250 Ohms Driving Power, approximate 2 Kilowatts

  • Max. Sig. Driving Power, approx [1]

    1500 W

    Max. Sig. Driving Power, approx. 1,500 Watts Power Output, approximate 104 Kilowatts

  • Max. Sig. Driving Power, approx [2]

    104 W

    Max. Sig. Driving Power, approx. 1,500 Watts Power Output, approximate 104 Kilowatts

  • Max. Sig. Power Output, approx

    150 W

    Max. Sig. Power Output, approx. 150 Kilowatts

  • Maximum Ratings, Absolute Values DC Plcf'e Voltage

    17500 V

    Maximum Ratings, Absolute Values DC Plcf'e Voltage 17,500 Volts

  • DC Grid Yoltage —

    3000

    DC Grid Yoltage — 3,000 Volts

  • DC Plate Voltage [1]

    17500 V

    DC Plate Voltage 17,500 VYolis DC Plate Current 18 Amperes

  • DC Plate Voltage [2]

    18 V

    DC Plate Voltage 17,500 VYolis DC Plate Current 18 Amperes

  • DC Plate Current [1]

    12 A

    DC Plate Current 12 Amperes DC Grid Current 2 Amperes

  • DC Plate Current [2]

    2 A

    DC Plate Current 12 Amperes DC Grid Current 2 Amperes

  • Piate Input [1]

    100

    Piate Input 100 Kilowatts Plate Input 300 Kilowatts

  • Piate Input [2]

    300

    Piate Input 100 Kilowatts Plate Input 300 Kilowatts

  • Plate Dissipation [1]

    70 W

    Plate Dissipation 70 Kilowatts Plate Dissipation 70 Kilowatts

  • Plate Dissipation [2]

    70 W

    Plate Dissipation 70 Kilowatts Plate Dissipation 70 Kilowatts

  • DC Plate Voitage

    17500

    DC Plate Voitage 17,500 Yolts

  • DC Plate Voltage

    15000 V

    DC Plate Voltage 15,000 Volts

  • DC Grid VYoltage —

    1000

    DC Grid VYoltage — 1,000 Volts

  • DC Grid Voltage [1]

    -375 V

    DC Grid Voltage —375 Volts Peak R-F Grid %ol'age 1,960 Volts

  • DC Grid Voltage [2]

    1960 V

    DC Grid Voltage —375 Volts Peak R-F Grid %ol'age 1,960 Volts

  • Peak R-F Grid Voltage [1]

    500 V

    Peak R-F Grid Voltage 500 Volts DC Plate Current 13.8 Amperes

  • Peak R-F Grid Voltage [2]

    13.8 V

    Peak R-F Grid Voltage 500 Volts DC Plate Current 13.8 Amperes

  • DC Plate Current [1]

    4.9 mA

    DC Plate Current 4.9 Amperes DC Grid Current, approximate 2 Amperes

  • DC Plate Current [2]

    2 mA

    DC Plate Current 4.9 Amperes DC Grid Current, approximate 2 Amperes

  • DC Grid Current [1]

    0 mA

    DC Grid Current 0.0 Amperes Driving Power, approximate 3.6 Kilowatts

  • DC Grid Current [2]

    3.6 mA

    DC Grid Current 0.0 Amperes Driving Power, approximate 3.6 Kilowatts

  • Driving Power, approximatet [1]

    770 W

    Driving Power, approximatet 770 Watts Power QOutput, approximate 180 Kilowatts

  • Driving Power, approximatet [2]

    180 W

    Driving Power, approximatet 770 Watts Power QOutput, approximate 180 Kilowatts

  • Power Output, approximate

    25 W

    Power Output, approximate 25 Kilowatts f[Modulation essentially negative may be used if the positive

  • Published value [1]

    1

    1At crest of audio-frequency cycle with modulation factor of 1.0, conditions.

  • Published value [2]

    1

    1At crest of audio-frequency cycle with modulation factor of 1.0, conditions.

  • The F

    5918

    The F-5918-A grid is especially

  • in opera t ion

    70

    in opera t ion. 70 Kilowatts Plate D issipa t fon

  • Published value

    70

    70 Kilowatts Plate D

  • structure of the F [1]

    5918 W

    structure of the F-5918-A 70 Kilowatts Plate Dissipation

  • structure of the F [2]

    70 W

    structure of the F-5918-A 70 Kilowatts Plate Dissipation

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

    22 MHz

  • Cooling method

    water