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

8893

Compact rugged ceramic-metal planar triode for continuous-wave or pulsed oscillator and amplifier service in demanding high-frequency equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 1.3 A

Description

The EIMAC 8893 is a compact rugged ceramic/metal planar triode for cw or pulsed oscillator and amplifier 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
6.3 V
Nominal heater current
1.3 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
Transconductance
0.03 S
Amplification factor
60
Max plate voltage
3500 V
Max plate dissipation
100 W
Max grid dissipation
1.5 W
Max cathode current
5 A

Promoted values are taken from printed General Characteristics / Maximum Ratings. Additional published conditions and operating data are preserved 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

Capacitance

  • Grid-Cathode Capacitance

    8 pF

  • Grid-Plate Capacitance

    2.35 pF

  • Plate-Cathode Capacitance

    0.1 pF

Characteristic

  • Cathode Heating Time

    60 s

Other

  • Peak Plate Voltage

    3500 V

  • DC Plate Current

    150 mA

  • Peak Plate Current

    5 A

  • Peak Grid Current

    1.5 A

  • Frequency

    4 GHz

  • Representative Power Output

    1000 W

    GridPulsed;Frequency=2.5GHz

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Current, at

    6.3 A

    Current, at 6.3 volts ................

  • Plate Dissipation (maximum)

    2 W

    Plate Dissipation (maximum)2 ................

  • Published value

    2

    2. With forced air cooling or appropriate conduction and/or convection cooling.

  • Ceramic/Metal Seals

    250

    Ceramic/Metal Seals ........ ...... 250OC

  • Dc GRID cuFmENT ....... Peak Plate Voltage

    1.5 kV

    Dc GRID cuFmENT ....... Peak Plate Voltage 1.5kv

  • PEAK PLATE CURRENT ..... Peak Plate Current

    3 mA

    PEAK PLATE CURRENT ..... Peak Plate Current ............. 3a maximum

  • PEAK GF}lD CURRENT ...... Power Output(useful)

    1 A

    PEAK GF}lD CURRENT ...... Power Output(useful) ............ 1 kw, minimum

  • PULSE DURATION

    1

    PULSE DURATION 1 .......

  • Published value

    1

    1. For applications requiring longer pulse duration

  • Published value

    2

    2. The heater is electrically isolated from the cathode.

  • R Q' [1]

    86

    R Q'86 0214 472 544 f ornanoe the Anode

  • R Q' [2]

    214

    R Q'86 0214 472 544 f ornanoe the Anode

  • R Q' [3]

    472

    R Q'86 0214 472 544 f ornanoe the Anode

  • R Q' [4]

    544

    R Q'86 0214 472 544 f ornanoe the Anode

Data set 03

1975 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater voltage nominal

    6.3 V

  • Heater current nominal

    1.3 A

  • Transconductance

    30000 uS

  • Amplification factor

    60

Capacitance

  • Input/grid-cathode capacitance

    8 pF

  • Output/plate-cathode capacitance

    2.35 pF

  • Grid-plate/feedback capacitance

    0.1 pF

Other

  • Maximum plate voltage

    3500 V

  • Maximum plate dissipation

    100 W

  • Maximum grid dissipation

    1.5 W

  • Maximum cathode or pulse plate current

    5 A

  • Maximum rated frequency

    4 GHz

  • DC plate voltage

    2000 V

    ClassC;Pulsed

  • Peak plate voltage

    3500 V

    ClassC;Pulsed

  • DC plate current

    150 mA

  • DC grid current

    45 mA

  • Peak grid current

    1.5 A

  • DC grid voltage

    -100 V

  • Pulse duration

    6 us

  • Duty factor

    0.004

  • Representative frequency

    2.5 GHz

    GridPulsedOscillator

  • Representative peak plate voltage

    1500 V

    GridPulsedOscillator

  • Representative peak plate current

    3 A

    GridPulsedOscillator

  • Useful output power minimum

    1000 W

    GridPulsedOscillator

Data set 04

1976 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater voltage nominal

    6.3 V

  • Heater current nominal

    1.3 A

  • Transconductance

    30000 uS

  • Amplification factor

    60

Capacitance

  • Input/grid-cathode capacitance

    8 pF

  • Output/plate-cathode capacitance

    2.35 pF

  • Grid-plate/feedback capacitance

    0.1 pF

Other

  • Maximum plate voltage

    3500 V

  • Maximum plate dissipation

    100 W

  • Maximum grid dissipation

    1.5 W

  • Maximum cathode or pulse plate current

    5 A

  • Maximum rated frequency

    4 GHz

  • DC plate voltage

    2000 V

    ClassC;Pulsed

  • Peak plate voltage

    3500 V

    ClassC;Pulsed

  • DC plate current

    150 mA

  • DC grid current

    45 mA

  • Peak grid current

    1.5 A

  • DC grid voltage

    -100 V

  • Pulse duration

    6 us

  • Duty factor

    0.004

  • Representative frequency

    2.5 GHz

    GridPulsedOscillator

  • Representative peak plate voltage

    1500 V

    GridPulsedOscillator

  • Representative peak plate current

    3 A

    GridPulsedOscillator

  • Useful output power minimum

    1000 W

    GridPulsedOscillator