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Specialized - Klystron ·Klystron

4K50000LQ

Four-cavity magnetically focused Eimac power-amplifier klystron covering approximately 600–985 MHz, delivering about 10 kW CW with broadband capability.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
8 V / 40 A

Description

The Eimac 4K50,000LQ is a ceramic and metal, four-cavity, mag- netically focused, power-amplifier klystron designed for use at frequencies between 600 and 985 megacycles. It will deliver a minimum CW output power of 10 kilowatts with a power gain of more than 55 db. In applications requiring a 6~megacycle bandwidth at the 0.5-db power points, the 4K50, 000LQ will deliver 10 kilowatts output power with a power gain of 30 db. The resonant cavities for the 4K50, 000LQ are completed through the cylindrical ceramic windows of the klystron and all tuning is accomplished outside the vacuum envelope. This design permits a wide tuning range and allows repeated tuning cycling without damage to vacuum seals. An Eimac Klystron Amplifier Circuit Assembly (Catalog Number H-101A) has been designed for use with this tube and covers the frequency range of 720 to 985 megacycles. Other frequency ranges can be provided if required. This assembly includes an electro- magnetic frame and coils, external tuning boxes, an adjustable output coupler, and an Eimac SK-110 Air-System Socket.

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
8 V
Nominal heater current
40 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

Klystron

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Single electrical section; values mapped from printed ratings/characteristics. Klystron represented as SectionType Other because the canonical section vocabulary has no Klystron section type.

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

Klystron

Other

  • The Eimac

    0 a

    The Eimac 4K50,000LQ is a ceramic and metal, four-cavity, mag-

  • frequencies between

    985 megacycles

    frequencies between 600 and 985 megacycles. It will deliver a

  • minimum CW output power of

    10 kilowatts

    minimum CW output power of 10 kilowatts with a power gain of more

  • than

    6 db

    than 55 db. In applications requiring a 6~megacycle bandwidth at

  • the

    10 db

    the 0.5-db power points, the 4K50, 000LQ will deliver 10 kilowatts

  • output power with a power gain of

    30 a

    output power with a power gain of 30 db.

  • frequency range of

    985 megacycles

    frequency range of 720 to 985 megacycles. Other frequency ranges

  • Voltage - ~

    8 volts

    Voltage - ~ - - 8.0 volts

  • Current

    40 amperes

    Current - - - - 40 amperes

  • Maximum Starting Current

    80 amperes

    Maximum Starting Current - - 80 amperes

  • Voltage

    2250 volts

    Voltage - - - - 2250 volts

  • Current

    0.71 ampere

    Current - - - - 0.71 ampere

  • Power

    1600 watts

    Power - - - - 1600 watts

  • Narrow Band

    55 db

    Narrow Band - - - 55 db

  • Broad Band (

    30 db

    Broad Band (6 mc at 0.5-db points)* 30 db

  • Output Power

    10000 watts

    Output Power - - - - 10,000 watts

  • R-F Output Coupling

    50 ohm

    R-F Output Coupling - 3 1/8-inch 50-ohm air line

  • Prefocus~Coil Voltage

    25 volts

    Prefocus~Coil Voltage - - - - 0to 25 volts

  • Prefocus-Coil Current

    1 ampere

    Prefocus-Coil Current - - - - 0 to 1 ampere

  • Voltage

    175 volts

    Voltage - - - - - 0to 175 volts

  • Current - - - - - Oto

    3 amperes

    Current - - - - - Oto 3 amperes

  • Collector-Coil Voltage

    50 volts

    Collector-Coil Voltage - - - - 0to 50 volts

  • Collector-Coil Current

    5 amperes

    Collector-Coil Current - - - 0tol.5 amperes

  • D-C BEAM CURRENT

    2.5 AMPERES

    D-C BEAM CURRENT - - - - 2.5 MAX, AMPERES

  • D-C BODY CURRENT (CONTINUOUS)

    0.1 AMPERE

    D-C BODY CURRENT (CONTINUOUS) - - - 0.1 MAX, AMPERE

  • D-C BODY CURRENT (TUNING ONLY)

    0.15 AMPERE

    D-C BODY CURRENT (TUNING ONLY) - - - 0.15 MAX, AMPERE

  • FOCUS-ELECTRODE VOLTAGE

    500 VOLTS

    FOCUS-ELECTRODE VOLTAGE - - - - - -500 MAX, VOLTS

  • D-C CURRENT

    0.75 AMPERE

    D-C CURRENT - - - - - 0.75 MAX. AMPERE

  • D-C POWER

    1.6 KILOWATTS

    D-C POWER - - - - - 1.6 MAX, KILOWATTS

  • COLLECTOR DISSIPATION

    50 KILOWATTS

    COLLECTOR DISSIPATION - - - 50 MAX, KILOWATTS

  • Frequency

    900 megacycles

    Frequency - - - - 900 900 megacycles

  • Output Power

    11.2 kilowatts

    Output Power - - - - 10.15 11.2 kilowatts

  • Bandwidth (

    1.05 db

    Bandwidth (0,.5-db power - - 6.85 1.05 megacycles

  • Driving Power

    0.02 watts

    Driving Power - - - - 5 0.02 watts

  • Power Gain

    57.5 db

    Power Gain - - - - 33 57.5 db

  • D-C Beam Current

    1.59 amperes

    D-C Beam Current - - - 1.78 1.59 amperes

  • Beam Input Power

    25.4 kilowatts

    Beam Input Power - - - 30.2 25.4 kilowatts

  • D-C Collector Current

    1.51 amperes

    D-C Collector Current - - 1.7 1.51 amperes

  • Collector Dissipation*

    1292 kilowatts

    Collector Dissipation* - - - 11.51 12,92 kilowatts

  • Focus-Electrode Voltage

    200 volts

    Focus-Electrode Voltage - - - -200 -200 volts

  • Filament Voltage

    8 volts

    Filament Voltage - - - - 8.0 8.0 volts

  • Filament Current

    40 amperes

    Filament Current - - - - 40 40 amperes

  • Voltage*

    2250 volts

    Voltage* - - - - 2250 2250 volts

  • Current*

    0.71 ampere

    Current* - - - - 0.71 0.71 ampere

  • Power

    1600 watts

    Power - - - - - 1600 1600 watts

  • Prefocus

    0.75 ampere

    Prefocus - - - - 0.8 0.75 ampere

  • First Body

    1.2 amperes

    First Body - - 1.2 1.2 amperes

  • Second Body

    1.8 Second

    Second Body - - 1.9 1.8 amperes

  • Third Body

    2.3 amperes

    Third Body - - 2.5 2.3 amperes

  • Collector

    0.85 ampere

    Collector - - 0.85 0.85 ampere

  • SECTION A-A K

    1.1 A

    SECTION A-A K 1.030 1.100

  • Printed in U.S.A

    4915 A

    Printed in U.S.A. 4915