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Power - Beam (NOT sweep) (over 1000V 100W) ·Tetrode

8168

Forced-air-cooled ceramic-metal radial-beam tetrode designed for low-voltage high-current Class-AB linear RF and audio amplification, producing kilowatt-class output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6 V / 9 A

Description

The EIMAC 8168/4CX1000A is a ceramic/metal, forced-air cooled, radial-beam tetrode with a rated maximum plate dissipation of 1000 watts. It is a low-voltage, high-current tube specifically designed for Class-AB]1 tf linear-amplifier or audio-amplifier applications where its high gain may be used to advantage. At its rated maximum plate voltage of 3000 volts, it is capable of producing 1630 watts of peak-envelope output power. Two

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
6 V
Nominal heater current
9 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
Transconductance
0.037 S
Max plate voltage
3000 V
Max screen voltage
400 V
Max plate dissipation
1000 W
Max screen dissipation
12 W

Promoted maximum ratings/characteristics populated from published headings; service-specific values retained in parameters.

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

  • radial-beam tetrode with a rated maximum plate dissipation of

    1000 W

    radial-beam tetrode with a rated maximum plate dissipation of 1000 watts.

  • It is a low-voltage, high-current tube specifically designed for Class-AB]

    1

    It is a low-voltage, high-current tube specifically designed for Class-AB]1

  • be used to advantage. At its rated maximum plate voltage of

    3000 V

    be used to advantage. At its rated maximum plate voltage of 3000 volts, it

  • is capable of producing

    1630 W

    is capable of producing 1630 watts of peak-envelope output power. Two

  • Heater: Voltage [1]

    0

    Heater: Voltage ........00iiiiiiinnnens 6.0 + 0.3

  • Heater: Voltage [2]

    6

    Heater: Voltage ........00iiiiiiinnnens 6.0 + 0.3

  • Heater: Voltage [3]

    0.3

    Heater: Voltage ........00iiiiiiinnnens 6.0 + 0.3

  • Current, at [1]

    6 V

    Current, at 6.0 volts .. ... ..o 9.0

  • Current, at [2]

    9 V

    Current, at 6.0 volts .. ... ..o 9.0

  • Direct Interelectrode Capacitances (grounded cathode)

    2

    Direct Interelectrode Capacitances (grounded cathode)2

  • Input [1]

    500000005 pF

    Input ...... 500000005 0005300 0000005060 0¢0 81 pF

  • Input [2]

    5300 pF

    Input ...... 500000005 0005300 0000005060 0¢0 81 pF

  • Input [3]

    5060 pF

    Input ...... 500000005 0005300 0000005060 0¢0 81 pF

  • Input [4]

    0 pF

    Input ...... 500000005 0005300 0000005060 0¢0 81 pF

  • Input [5]

    0 pF

    Input ...... 500000005 0005300 0000005060 0¢0 81 pF

  • Input [6]

    81 pF

    Input ...... 500000005 0005300 0000005060 0¢0 81 pF

  • Direct Interelectrode Capacitances (grounded grid and screen)

    2

    Direct Interelectrode Capacitances (grounded grid and screen)2

  • RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION (Frequencies to

    30 MHz

    RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION (Frequencies to 30 MHz)

  • Plate Voltage [1]

    2000

    Plate Voltage . . . .. ...... 2000 2500 3000 Vdc

  • Plate Voltage [2]

    2500

    Plate Voltage . . . .. ...... 2000 2500 3000 Vdc

  • Plate Voltage [3]

    3000

    Plate Voltage . . . .. ...... 2000 2500 3000 Vdc

  • Grid Voltage! . . ., [1]

    -60

    Grid Voltage! . . ., .. ... .. -60 -60 -60 Vdc

  • Grid Voltage! . . ., [2]

    -60

    Grid Voltage! . . ., .. ... .. -60 -60 -60 Vdc

  • Grid Voltage! . . ., [3]

    -60

    Grid Voltage! . . ., .. ... .. -60 -60 -60 Vdc

  • DCPLATEVOLTAGE .« v v v v vt v e v [1]

    3000 V

    DCPLATEVOLTAGE .« v v v v vt v e v 3000 VOLTS Zero-Signal Plate Current . .. 358 250 5758) mz«dc

  • DCPLATEVOLTAGE .« v v v v vt v e v [2]

    358 V

    DCPLATEVOLTAGE .« v v v v vt v e v 3000 VOLTS Zero-Signal Plate Current . .. 358 250 5758) mz«dc

  • DCPLATEVOLTAGE .« v v v v vt v e v [3]

    250 V

    DCPLATEVOLTAGE .« v v v v vt v e v 3000 VOLTS Zero-Signal Plate Current . .. 358 250 5758) mz«dc

  • DCPLATEVOLTAGE .« v v v v vt v e v [4]

    5758 V

    DCPLATEVOLTAGE .« v v v v vt v e v 3000 VOLTS Zero-Signal Plate Current . .. 358 250 5758) mz«dc

  • _____________ [1]

    400

    _____________ 400 L Single Tone Plate Current . . . 890 885 mAdc

  • _____________ [2]

    890

    _____________ 400 L Single Tone Plate Current . . . 890 885 mAdc

  • _____________ [3]

    885

    _____________ 400 L Single Tone Plate Current . . . 890 885 mAdc

  • gg §LC§EEN VO;;S.SE [1]

    1

    gg §LC§EEN VO;;S.SE 1.0 XI\OAPE:E Two-Tone Plate Current . ... 645 650 635 mAdc

  • gg §LC§EEN VO;;S.SE [2]

    645

    gg §LC§EEN VO;;S.SE 1.0 XI\OAPE:E Two-Tone Plate Current . ... 645 650 635 mAdc

  • gg §LC§EEN VO;;S.SE [3]

    650

    gg §LC§EEN VO;;S.SE 1.0 XI\OAPE:E Two-Tone Plate Current . ... 645 650 635 mAdc

  • gg §LC§EEN VO;;S.SE [4]

    635

    gg §LC§EEN VO;;S.SE 1.0 XI\OAPE:E Two-Tone Plate Current . ... 645 650 635 mAdc

  • TECURRENT ... .vvvveens . Zero-Signa! Screen Current [1]

    8

    TECURRENT ... .vvvveens . Zero-Signa! Screen Current . . 8 6 5 mAdc

  • TECURRENT ... .vvvveens . Zero-Signa! Screen Current [2]

    6

    TECURRENT ... .vvvveens . Zero-Signa! Screen Current . . 8 6 5 mAdc

  • TECURRENT ... .vvvveens . Zero-Signa! Screen Current [3]

    5

    TECURRENT ... .vvvveens . Zero-Signa! Screen Current . . 8 6 5 mAdc

  • PLATE DISSIPATION ... ...... « [1]

    1000 W

    PLATE DISSIPATION ... ...... «... 1000 WATTS Single-Tone Screen Current2. . 35 35 35 mAdc

  • PLATE DISSIPATION ... ...... « [2]

    35 W

    PLATE DISSIPATION ... ...... «... 1000 WATTS Single-Tone Screen Current2. . 35 35 35 mAdc

  • PLATE DISSIPATION ... ...... « [3]

    35 W

    PLATE DISSIPATION ... ...... «... 1000 WATTS Single-Tone Screen Current2. . 35 35 35 mAdc

  • PLATE DISSIPATION ... ...... « [4]

    35 W

    PLATE DISSIPATION ... ...... «... 1000 WATTS Single-Tone Screen Current2. . 35 35 35 mAdc

  • SCREEN DISSIPATION . . . v v v v vt v v v [1]

    12 W

    SCREEN DISSIPATION . . . v v v v vt v v v 12 WATTS Two-Tone Screen Currentz P 10 8 8 mAdc

  • SCREEN DISSIPATION . . . v v v v vt v v v [2]

    10 W

    SCREEN DISSIPATION . . . v v v v vt v v v 12 WATTS Two-Tone Screen Currentz P 10 8 8 mAdc

  • SCREEN DISSIPATION . . . v v v v vt v v v [3]

    8 W

    SCREEN DISSIPATION . . . v v v v vt v v v 12 WATTS Two-Tone Screen Currentz P 10 8 8 mAdc

  • SCREEN DISSIPATION . . . v v v v vt v v v [4]

    8 W

    SCREEN DISSIPATION . . . v v v v vt v v v 12 WATTS Two-Tone Screen Currentz P 10 8 8 mAdc

  • e [1]

    0 W

    e 0 WATT Plate Output Power . ... ... 930 1300 1630 w

  • e [2]

    930 W

    e 0 WATT Plate Output Power . ... ... 930 1300 1630 w

  • e [3]

    1300 W

    e 0 WATT Plate Output Power . ... ... 930 1300 1630 w

  • e [4]

    1630 W

    e 0 WATT Plate Output Power . ... ... 930 1300 1630 w

  • Published value

    1

    1. Adjust to specified zero-signal dc plate current.

  • Plate Voltage [1]

    2000

    . : : . Plate Voltage . ......... 2000 2500 3000 Vdc

  • Plate Voltage [2]

    2500

    . : : . Plate Voltage . ......... 2000 2500 3000 Vdc

  • Plate Voltage [3]

    3000

    . : : . Plate Voltage . ......... 2000 2500 3000 Vdc

  • Class AB1. Grid Driven(Sinusoidal Wave) Screen Voltage [1]

    325

    Class AB1. Grid Driven(Sinusoidal Wave) Screen Voltage . . . ... ... 325 325 325 Vds

  • Class AB1. Grid Driven(Sinusoidal Wave) Screen Voltage [2]

    325

    Class AB1. Grid Driven(Sinusoidal Wave) Screen Voltage . . . ... ... 325 325 325 Vds

  • Class AB1. Grid Driven(Sinusoidal Wave) Screen Voltage [3]

    325

    Class AB1. Grid Driven(Sinusoidal Wave) Screen Voltage . . . ... ... 325 325 325 Vds

  • Grid Voltage [1]

    1.2

    Grid Voltage 1.2, . . ... ... -0 -60 -60 Vdc

  • Grid Voltage [2]

    0

    Grid Voltage 1.2, . . ... ... -0 -60 -60 Vdc

  • Grid Voltage [3]

    -60

    Grid Voltage 1.2, . . ... ... -0 -60 -60 Vdc

  • Grid Voltage [4]

    -60

    Grid Voltage 1.2, . . ... ... -0 -60 -60 Vdc

  • MAXIMUM RATINGS (Per Tube) Zero-Signal Plate Current [1]

    500

    MAXIMUM RATINGS (Per Tube) Zero-Signal Plate Current .. 500 500 500 mAdc

  • MAXIMUM RATINGS (Per Tube) Zero-Signal Plate Current [2]

    500

    MAXIMUM RATINGS (Per Tube) Zero-Signal Plate Current .. 500 500 500 mAdc

  • MAXIMUM RATINGS (Per Tube) Zero-Signal Plate Current [3]

    500

    MAXIMUM RATINGS (Per Tube) Zero-Signal Plate Current .. 500 500 500 mAdc

  • Max Signal Plate Current [1]

    1.78

    Max Signal Plate Current.. 1.78 1.77 1.76 Adc

  • Max Signal Plate Current [2]

    1.77

    Max Signal Plate Current.. 1.78 1.77 1.76 Adc

  • Max Signal Plate Current [3]

    1.76

    Max Signal Plate Current.. 1.78 1.77 1.76 Adc

  • DC PLATE VOLTAGE . . ... .. e

    3000 V

    DC PLATE VOLTAGE . . ... .. e 3000 VOLTS Zero-Signal

  • Signal Screen Currentl

    16

    Signal Screen Currentl. .. 16

  • DC SCREEN VOLTAGE . . ....... «+ [1]

    400 V

    DC SCREEN VOLTAGE . . ....... «+.. 400 VOLTS Plate Output Power. . . . . . . 1860 2600 3260 W

  • DC SCREEN VOLTAGE . . ....... «+ [2]

    1860 V

    DC SCREEN VOLTAGE . . ....... «+.. 400 VOLTS Plate Output Power. . . . . . . 1860 2600 3260 W

  • DC SCREEN VOLTAGE . . ....... «+ [3]

    2600 V

    DC SCREEN VOLTAGE . . ....... «+.. 400 VOLTS Plate Output Power. . . . . . . 1860 2600 3260 W

  • DC SCREEN VOLTAGE . . ....... «+ [4]

    3260 V

    DC SCREEN VOLTAGE . . ....... «+.. 400 VOLTS Plate Output Power. . . . . . . 1860 2600 3260 W

  • DCPLATECURRENT ..o v v vn v e v v v v

    1 A

    DCPLATECURRENT ..o v v vn v e v v v v 1.0 AMPERE Load Resistance

  • PLATE DISSIPATION .. ... v v i v v v n [1]

    1000 W

    PLATE DISSIPATION .. ... v v i v v v n 1000 WATTS (plate to plate) . ...... 2040 2850 3860 Q

  • PLATE DISSIPATION .. ... v v i v v v n [2]

    2040 W

    PLATE DISSIPATION .. ... v v i v v v n 1000 WATTS (plate to plate) . ...... 2040 2850 3860 Q

  • PLATE DISSIPATION .. ... v v i v v v n [3]

    2850 W

    PLATE DISSIPATION .. ... v v i v v v n 1000 WATTS (plate to plate) . ...... 2040 2850 3860 Q

  • PLATE DISSIPATION .. ... v v i v v v n [4]

    3860 W

    PLATE DISSIPATION .. ... v v i v v v n 1000 WATTS (plate to plate) . ...... 2040 2850 3860 Q

  • SCREEN DISSIPATION [1]

    12 W

    SCREEN DISSIPATION ... ... 12 WATTS 1. Approximate value.

  • SCREEN DISSIPATION [2]

    1 W

    SCREEN DISSIPATION ... ... 12 WATTS 1. Approximate value.

  • GRID DISSIPATION . . . v v v v vt et v s [1]

    0 W

    GRID DISSIPATION . . . v v v v vt et v s 0 WATT 2. Adjust to give stated zero-signal plate current.

  • GRID DISSIPATION . . . v v v v vt et v s [2]

    2 W

    GRID DISSIPATION . . . v v v v vt et v s 0 WATT 2. Adjust to give stated zero-signal plate current.

  • Heater: Current at6 [1]

    0 V

    Heater: Current at6.0 volts . . ... v v v v v vt ..... e 8.1 9.9

  • Heater: Current at6 [2]

    8.1 V

    Heater: Current at6.0 volts . . ... v v v v v vt ..... e 8.1 9.9

  • Heater: Current at6 [3]

    9.9 V

    Heater: Current at6.0 volts . . ... v v v v v vt ..... e 8.1 9.9

  • Input ........... e e [1]

    75 pF

    Input ........... e e . 75 88 pF

  • Input ........... e e [2]

    88 pF

    Input ........... e e . 75 88 pF

  • dissipation at sea level and with inlet air tem- tion double amplitude is

    25

    dissipation at sea level and with inlet air tem- tion double amplitude is .25 inch.

  • difference across the tube and socket of

    0.2

    difference across the tube and socket of 0.2 within specification for grid bias voltage and

  • At higher altitudes and at VHF increased air [1]

    4 V

    At higher altitudes and at VHF increased air 4CX1000A is 6.0 volts. The voltage, as measured

  • At higher altitudes and at VHF increased air [2]

    0 V

    At higher altitudes and at VHF increased air 4CX1000A is 6.0 volts. The voltage, as measured

  • At higher altitudes and at VHF increased air [3]

    6 V

    At higher altitudes and at VHF increased air 4CX1000A is 6.0 volts. The voltage, as measured

  • drop across tube and socket of [1]

    0.3

    drop across tube and socket of 0.3 inch of water voltage be allowed to exceed 5% above the rated

  • drop across tube and socket of [2]

    5

    drop across tube and socket of 0.3 inch of water voltage be allowed to exceed 5% above the rated

  • lesser degree depending on individual tube de- bleeder current should approximate

    70

    lesser degree depending on individual tube de- bleeder current should approximate 70 milliam-

  • Published value [1]

    4

    4CX1000A and, under some operating condi- It should be observed that this bleeder power

  • Published value [2]

    0

    4CX1000A and, under some operating condi- It should be observed that this bleeder power

  • The product of the peak screen voltage and the dissipation power is

    1000 W

    The product of the peak screen voltage and the dissipation power is 1000 watts, Except for

  • Published value [1]

    50 V

    50 SCREEN VOLTAGE — 325 VOLTS

  • Published value [2]

    325 V

    50 SCREEN VOLTAGE — 325 VOLTS