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Specialized - Traveling Wave ·TravelingWave

EM779

Traveling-wave microwave amplifier for broadband RF power or intermediate amplification, using electron-beam interaction with a slow-wave structure.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

TENTATIVE DATA FOR EIMAC EM-779 TRAVELING WAVE TUBE The Eimac EM-779 is a ruggedized, ceramic and metal, periodic permanent magnet focused, power-amplifier traveling wave tube. It is capable of delivering a minimum CW output power of one waftt throughout the frequency range of 5.0 to 11.0 Gigacycles with a nominal small signal gain of 30 decibels. The EM-779 is designed to operate under severe environmental extremes of shock, vibration,

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
600 mA
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

TravelingWave

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted fields populated only where the published value maps directly to the schema; device-specific values retained as 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

TravelingWave

Other

  • Published value

    30 dB

    30 db Gain

  • throughout the frequency range of [1]

    5 GHz

    throughout the frequency range of 5.0 to 11.0 Gigacycles with a

  • throughout the frequency range of [2]

    11 GHz

    throughout the frequency range of 5.0 to 11.0 Gigacycles with a

  • nominal small signal gain of [1]

    30 dB

    nominal small signal gain of 30 decibels. The EM-779 is designed to

  • nominal small signal gain of [2]

    779 dB

    nominal small signal gain of 30 decibels. The EM-779 is designed to

  • The use of temperature compensated permanent magnets allows the EM

    779

    The use of temperature compensated permanent magnets allows the EM-779 to be

  • Minimum Heating Time

    60 s

    Minimum Heating Time . . . . 60 seconds

  • Heater: Voltage

    6.3 V

    Heater: Voltage . . . . . . . . 6.3 volts

  • Current

    600 mA

    Current . . . . . . .. 0.6 amperes

  • Noise Figure . e [1]

    25 dB

    Noise Figure . e 25 to 34 decibels

  • Noise Figure . e [2]

    34 dB

    Noise Figure . e 25 to 34 decibels

  • Minimum Saturated Ou’rput Power e

    1 W

    Minimum Saturated Ou’rput Power e 1 watt

  • Frequency Range . e [1]

    5 GHz

    Frequency Range . e 5.0 to 11.0 gigacycles

  • Frequency Range . e [2]

    11 GHz

    Frequency Range . e 5.0 to 11.0 gigacycles

  • Input and Output Impedonce e

    50 ohm

    Input and Output Impedonce e 50 ohms nominal

  • D-C BEAM VOLTAGE* . e

    3000 V

    D-C BEAM VOLTAGE* . e 3000 VOLTS

  • D-C CATHODE CURRENT

    25 mA

    D-C CATHODE CURRENT . . . . . . 25 MILLIAMPERES

  • Frequency [1]

    5 GHz

    Frequency . . . : . 5.0 to 11.0 gigacycles

  • Frequency [2]

    11 GHz

    Frequency . . . : . 5.0 to 11.0 gigacycles

  • Minimum Output Power

    1 W

    Minimum Output Power . . . 1.0 watts

  • Small Signal Gain

    30 dB

    Small Signal Gain . . . . . . . . 30 decibels

  • D-C Beam Voltage* e

    2950 V

    D-C Beam Voltage* e 2950 volts

  • D-C Cathode Current

    23 mA

    D-C Cathode Current . . . . . . . 23 milliamperes

  • D-C Focus Electrode Voltage*

    -30 V

    D-C Focus Electrode Voltage* . . . . . -30 volts

  • D-C Focus Electrode Current

    0 mA

    D-C Focus Electrode Current . . . . . . 0 milliamperes

  • Cathode: The heater voltage should be maintained within =+

    5

    Cathode: The heater voltage should be maintained within =+ 5 per cent of the rated value

  • Focus Electrode: The focus electrode power supply must be regulated within ==

    2

    Focus Electrode: The focus electrode power supply must be regulated within == 2 per cent

  • Temperature [1]

    -54

    Temperature: —54°C to + 85°C

  • Temperature [2]

    85

    Temperature: —54°C to + 85°C

  • ANODE VOLTAGE _ [1]

    2950 V

    ANODE VOLTAGE _2950 Vdc FOCUS VOLTAGE =30 Vdc

  • ANODE VOLTAGE _ [2]

    30 V

    ANODE VOLTAGE _2950 Vdc FOCUS VOLTAGE =30 Vdc

  • CATHODE CURRENT [1]

    23

    CATHODE CURRENT 23 mAdc FILAMENT VOLTAGE 6.3 Vac

  • CATHODE CURRENT [2]

    6.3

    CATHODE CURRENT 23 mAdc FILAMENT VOLTAGE 6.3 Vac

  • Published value

    50

    50 BROADBAND TANGENTIAL SENSITIVITY