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Specialized - Klystron ·Klystron

4KM3000LQ

Four-cavity magnetically focused power-amplifier klystron covering approximately 710–985 MHz and delivering roughly 2 kW CW output.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / -

Description

The Eimac 4KM3000LQ is a four-cavity, magnetically focused, power-amplifier klystron of ceramic and metal. It is designed for use at frequencies between 710 and 985 megacycles and will deliver a minimum CW output power of two kilowatts with a minimum power gain of 25 decibels when operated at 50% collector depression.

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
5 V
Nominal heater current
-
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 4KM3000LQ is a four-cavity, magnetically focused,

  • use at frequencies between

    985 megacycles

    use at frequencies between 710 and 985 megacycles and will deliver

  • Heater: Voltage

    5 volts

    Heater: Voltage - - - 5 volts

  • Current

    33 amperes

    Current - - - 33 amperes

  • Maximum Starting Current

    65 amperes

    Maximum Starting Current - 65 amperes

  • (To other electrodes)

    21 uuf

    (To other electrodes) - - - 21 uuf

  • Output Power (Narrow Band CW)

    2000 watts

    Output Power (Narrow Band CW) - 2000 watts

  • Frequency Range (In H

    985 megacycles

    Frequency Range (In H-118 - 710 to 985 megacycles

  • Output

    50 ohm

    Output - - - - - 1-5/8 inch 50-ohm line

  • of

    68 °C

    of 20°C (68°F) the flow rates tabulated below are sufficient for operation at maximum

  • Prefocus Coil Voltage

    0 volts

    Prefocus Coil Voltage - - - - - - 0to50 volts

  • Prefocus Coil Current

    2 amperes

    Prefocus Coil Current - - - - - - 2.0 amperes

  • Voltage

    100 volts

    Voltage - - - - - - - 0to 100 volts

  • Current

    3 amperes

    Current - - - - - - - 3.0 amperes

  • Collector Coil Voltage

    50 volts

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

  • Collector Coil Current - - - - - - O

    1.5 amperes

    Collector Coil Current - - - - - - O0to 1.5 amperes

  • D-C BEAM VOLTAGE

    10000 VOLTS

    D-C BEAM VOLTAGE - - - - - - 10,000 VOLTS

  • D-C BEAM CURRENT

    0.75 AMPERE

    D-C BEAM CURRENT - - - - - - 0.750 AMPERE

  • D-C FOCUS ELECTRODE VOLTAGE

    500 VOLTS

    D-C FOCUS ELECTRODE VOLTAGE - - - - -500 VOLTS

  • COLLECTOR DISSIPATION - - ~

    3000 WATTS

    COLLECTOR DISSIPATION - - ~ - 3000 WATTS

  • SEAL TEMPERATURES

    175 DEGREES C

    SEAL TEMPERATURES - - - - - 175 DEGREES C

  • Frequency

    900 megacycles

    Frequency - - - - - - - 900 megacycles

  • Output Power

    2150 watts

    Output Power - - - - - - - 2150 watts

  • Driving Power

    4 watts

    Driving Power - - - - - - - 4.0 watts

  • D-C Beam Voltage

    9000 volts

    D-C Beam Voltage - - - - - - 9000 volts

  • D-C Beam Current

    0.58 amperes

    D-C Beam Current - - - - - - 0.580 amperes

  • D-C Collector Voltage (from Cathode)

    4500 volts

    D-C Collector Voltage (from Cathode) - - - - 4500 volts

  • D-C Collector Current

    0.21 amperes

    D-C Collector Current - - - - - - 0.210 amperes

  • D-C Body Current

    0.37 amperes

    D-C Body Current - - - - - - 0.370 amperes

  • Focus Electrode Voltage

    200 volts

    Focus Electrode Voltage - - - - - -200 volts

  • Printed in U.S.A

    890 A

    Printed in U.S.A. 890