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

3X3000F7

Eimac external-anode high-mu zero-bias triode for Class B audio and RF amplification. Its very high amplification factor permits zero-bias operation, while grounded-grid circuits provide high power gain with approximately 3 kW plate dissipation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
7.5 V / 51 A

Description

The Eimac 8162/3X3000F7 is an external-anode power triode intended to be used as a zero-bias Class-B amplifier in audio or radio-frequency applications. Operation with zero grid bias offers circuit simplicity by eliminating the bias supply. In addition, grounded-grid operation is attractive since a power gain of over twenty times can be obtained with the 8162/3X3000F7.

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
7.5 V
Nominal heater current
51 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
200
Max plate voltage
5000 V
Max plate dissipation
3000 W
Max grid dissipation
225 W
Max cathode current
2.5 A

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

Triode

Other

  • The Eimac [1]

    8162

    The Eimac 8162/3X3000F7 is an external-anode power triode

  • The Eimac [2]

    3

    The Eimac 8162/3X3000F7 is an external-anode power triode

  • The Eimac [3]

    0

    The Eimac 8162/3X3000F7 is an external-anode power triode

  • Voltage

    7.5 V

    Voltage - - - - 7.5 volts

  • Current = = =

    51 A

    Current = = = - 51 amperes | = T

  • Amplification Factor

    200

    Amplification Factor - - - - 200 &

  • Frequency for Maximum Ratings = =

    30 MHz

    Frequency for Maximum Ratings = = 30 Mc

  • MAXIMUM RATINGS (Per Tube) D-C Plate Voltage

    4000

    MAXIMUM RATINGS (Per Tube) D-C Plate Voltage 4000 wvolts

  • D-C PIATE VOLTAGE [1]

    5000 V

    D-C PIATE VOLTAGE 5000 VOLTS D-C Grid Voltage 0 volts

  • D-C PIATE VOLTAGE [2]

    0 V

    D-C PIATE VOLTAGE 5000 VOLTS D-C Grid Voltage 0 volts

  • D-C PLATE CURRENT [1]

    2.5 A

    D-C PLATE CURRENT 2.5 AMPS Zero-8ig D-C Plate Current* 0.640 amps

  • D-C PLATE CURRENT [2]

    8 A

    D-C PLATE CURRENT 2.5 AMPS Zero-8ig D-C Plate Current* 0.640 amps

  • D-C PLATE CURRENT [3]

    640 mA

    D-C PLATE CURRENT 2.5 AMPS Zero-8ig D-C Plate Current* 0.640 amps

  • PLATE DISSIPATION [1]

    3 A

    PLATE DISSIPATION 3 KW Max-Sig D-C Plate Current 4.00 amps

  • PLATE DISSIPATION [2]

    4 A

    PLATE DISSIPATION 3 KW Max-Sig D-C Plate Current 4.00 amps

  • GRID DISSIPATION [1]

    225 A

    GRID DISSIPATION 225 WATTS Max-8Sig D-C Grid Current 0.860 -amps

  • GRID DISSIPATION [2]

    8 A

    GRID DISSIPATION 225 WATTS Max-8Sig D-C Grid Current 0.860 -amps

  • GRID DISSIPATION [3]

    860 mA

    GRID DISSIPATION 225 WATTS Max-8Sig D-C Grid Current 0.860 -amps

  • Driving Power

    120 W

    Driving Power 120 watts

  • Peak A-F Driving Voltage (per tube)

    185

    Peak A-F Driving Voltage (per tube) 185 wvolts

  • Load Resistance, Plate-to-Plate

    2200 ohm

    Load Resistance, Plate-to-Plate 2200 ohms

  • Max [1]

    8 W

    Max-8ig Plate Output Power 11,000 watts

  • Max [2]

    11000 W

    Max-8ig Plate Output Power 11,000 watts

  • MAXIMUM RATINGS D-C Plate Voltage [1]

    4000

    MAXIMUM RATINGS D-C Plate Voltage 4000 5000 wvolts

  • MAXIMUM RATINGS D-C Plate Voltage [2]

    5000

    MAXIMUM RATINGS D-C Plate Voltage 4000 5000 wvolts

  • D-C PLATE VOLTAGE [1]

    5000 V

    D-C PLATE VOLTAGE 5000 VOLTS Zero-Sig D-C Plate Current* 0.32 0.44 amps

  • D-C PLATE VOLTAGE [2]

    0.32 V

    D-C PLATE VOLTAGE 5000 VOLTS Zero-Sig D-C Plate Current* 0.32 0.44 amps

  • D-C PLATE VOLTAGE [3]

    0.44 V

    D-C PLATE VOLTAGE 5000 VOLTS Zero-Sig D-C Plate Current* 0.32 0.44 amps

  • D-C PLATE CURRENT [1]

    2.5 A

    D-C PLATE CURRENT 2.5 AMPS Max~Sig D-C Plate Current 2.00 1.56 amps

  • D-C PLATE CURRENT [2]

    2 A

    D-C PLATE CURRENT 2.5 AMPS Max~Sig D-C Plate Current 2.00 1.56 amps

  • D-C PLATE CURRENT [3]

    1.56 A

    D-C PLATE CURRENT 2.5 AMPS Max~Sig D-C Plate Current 2.00 1.56 amps

  • PLATE DISSIPATION [1]

    3 A

    PLATE DISSIPATION 3 KW Max-Sig D-C Grid Current 0.42 0.33 amps

  • PLATE DISSIPATION [2]

    420 mA

    PLATE DISSIPATION 3 KW Max-Sig D-C Grid Current 0.42 0.33 amps

  • PLATE DISSIPATION [3]

    330 mA

    PLATE DISSIPATION 3 KW Max-Sig D-C Grid Current 0.42 0.33 amps

  • GRID DISSIPATION [1]

    225 W

    GRID DISSIPATION 225 WATTS Driving Impedance 50 50 ohms

  • GRID DISSIPATION [2]

    50 W

    GRID DISSIPATION 225 WATTS Driving Impedance 50 50 ohms

  • GRID DISSIPATION [3]

    50 W

    GRID DISSIPATION 225 WATTS Driving Impedance 50 50 ohms

  • Resonant Load Impedance [1]

    1120 ohm

    Resonant Load Impedance 1120 1850 ohms

  • Resonant Load Impedance [2]

    1850 ohm

    Resonant Load Impedance 1120 1850 ohms

  • Max-Sig Driving Power [1]

    360 W

    Max-Sig Driving Power 360 215 watts

  • Max-Sig Driving Power [2]

    215 W

    Max-Sig Driving Power 360 215 watts

  • Power [1]

    5500 W

    Power 5500 5500 watts

  • Power [2]

    5500 W

    Power 5500 5500 watts

  • Power Gain [1]

    15.3

    Power Gain 15.3 25.6 times

  • Power Gain [2]

    25.6

    Power Gain 15.3 25.6 times

  • MAXIMUM RATINGS D~-C Plate Voltage

    4000

    MAXIMUM RATINGS D~-C Plate Voltage 4000 wvolts

  • D-C PLATE VOLTAGE [1]

    5000 V

    D-C PLATE VOLTAGE 5000 VOLTS D-C Grid Voltage 0 wvolts

  • D-C PLATE VOLTAGE [2]

    0 V

    D-C PLATE VOLTAGE 5000 VOLTS D-C Grid Voltage 0 wvolts

  • D-C PILATE CURRENT [1]

    2.5 A

    D-C PILATE CURRENT 2.5 AMPS Zero-Sig D-C Plate Current* 0.32 amps

  • D-C PILATE CURRENT [2]

    320 mA

    D-C PILATE CURRENT 2.5 AMPS Zero-Sig D-C Plate Current* 0.32 amps

  • PLATE DISSIPATION [1]

    3 A

    PLATE DISSIPATION 3 KW D-C Plate Current 0.815 amps

  • PLATE DISSIPATION [2]

    815 mA

    PLATE DISSIPATION 3 KW D-C Plate Current 0.815 amps

  • GRID DISSIPATION [1]

    225 A

    GRID DISSIPATION 225 WATTS D-C Grid Current 0.205 amps

  • GRID DISSIPATION [2]

    205 mA

    GRID DISSIPATION 225 WATTS D-C Grid Current 0.205 amps

  • Driving Impedance T

    220 ohm

    Driving Impedance T 220 ohms

  • Peak Driving Voltaget

    160

    Peak Driving Voltaget 160 wvolts

  • Driving Power

    15 W

    Driving Power 15 watts

  • Plate Output Power

    1100 W

    Plate Output Power 1100 watts

  • INPUT CIRCUIT - When the [1]

    3

    INPUT CIRCUIT - When the 3X3000F7 is operated as a grounded-grid r-f amplifier, the use

  • INPUT CIRCUIT - When the [2]

    0

    INPUT CIRCUIT - When the 3X3000F7 is operated as a grounded-grid r-f amplifier, the use

  • **Since the power dissipated by the filament is about

    375 W

    **Since the power dissipated by the filament is about 375 watts and

  • for an additional

    600 W

    for an additional 600 watts dissipation.

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater/filament voltage

    7.5 V

  • Heater/filament current

    51 A

  • Amplification factor

    200

Capacitance

  • Input/grid-cathode capacitance

    38 pF

  • Output/plate-cathode capacitance

    0.6 pF

  • Feedback/grid-plate capacitance

    24 pF

Other

  • Maximum plate voltage

    5000 V

  • Maximum plate dissipation

    3000 W

  • Maximum grid dissipation

    225 W

  • Maximum plate/cathode current

    2.5 A

  • Frequency for maximum ratings

    30 MHz

  • Typical grounded-grid plate voltage

    5000 V

    ClassB

  • Typical grounded-grid plate current

    1.56 A

    ClassB

  • Typical power gain

    20 x

    GroundedGrid