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Specialized - Klystron ·Klystron

4KM50000LF

Four-cavity magnetically focused 610–790 MHz power-amplifier klystron intended primarily for UHF television visual service, with about 10 kW output.

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

Description

The Eimac 4KM50,000LF is a four-cavity, magnetically focused, power-amplifier klystron designed for use at frequencies from 610 to 790 megacycles. Although intended primarily for UHF television vis- ual service this klystron may also be used for FM, for aural TV, or for tropospheric-scatter communications service. When tuned for narrow band CW operation this klystronwill deliver a minimum output power of 10 kilowatts with a power gain of 45 db. In television visual service it will provide more than 10 kilowatts of peak synchronizing output power with a power gain of 30 db. The AM random noise is more than 50 db below black level. Minimum band- width at the 3 db power level is 8 megacycles with a minimum of 7 megacycles at the 1 db level. The 4KM50,000LF employs the Eimac Modulating Anode which pro- vides an effective means of protecting the tube from internal arcs. All tuning is accomplished outside of the vacuum envelope by means of external resonant cavities which enclose the cylindrical ceramic windows of the klystron. This design permits awide tuningrange and allows external cavity loading for broadband applications. For spares or replacements, only the basic vacuum tube, without cavities, need be purchased. Eimac Klystron Amplifier Circuit Assembly H-139 has been designed for usewith the 4KM50,000LF to cover the specified frequency range . This assembly includes a klystron supporting structure, magnetic focusing coils, tuning cavities, adjustable load couplers forthe sec- ond, third and output cavities 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
7.5 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 4KM50,000LF is a four-cavity, magnetically focused,

  • a minimum output power of

    45 a

    a minimum output power of 10 kilowatts with a power gain of 45 db.

  • In television visual service it will provide more than

    10 kilowatts

    In television visual service it will provide more than 10 kilowatts of

  • peak synchronizing output power with a power gain of

    30 a

    peak synchronizing output power with a power gain of 30 db. The AM

  • random noise is more than

    50 db

    random noise is more than 50 db below black level. Minimum band-

  • width at the

    7 db

    width at the 3 db power level is 8 megacycles with a minimum of 7

  • megacycles at the

    1 megacycles

    megacycles at the 1 db level.

  • Heater: Voltage

    7.5 volts

    Heater: Voltage - - - - 7.5 volts

  • Current

    40 amperes

    Current - - - - 40.0 amperes

  • Maximum Starting Current

    80 amperes

    Maximum Starting Current - - 80.0 amperes

  • Voltage

    2 volts

    Voltage - - - - 2.0 volts

  • Current

    36 amperes

    Current - - - - 36.0 amperes

  • Output Power: Television Visual Service

    10 kilowatts

    Output Power: Television Visual Service - 10 kilowatts

  • Frequency Range (H

    790 megacycles

    Frequency Range (H-139 Assembly) 610 to 790 megacycles

  • Output

    50 ohm

    Output - - - - - 3 1/8 inch, 50-ohm line

  • (Effective

    1961 A

    (Effective 10-20-61) Copyright 1961 by Eitel-McCullough, Inc. Printed in U.S.A.

  • Prefocus Coil: Voltage

    50 volts

    Prefocus Coil: Voltage - - - - - - 0 to 50 volts

  • Current

    5 amperes

    Current - - - - - - 0tol.5 amperes

  • Voltage

    500 volts

    Voltage - - - - - - 0 to 500 volts

  • Current

    5 amperes

    Current - - - - - - 0to2.5 amperes

  • D-C BEAM CURRENT

    2.5 AMPERES

    D-C BEAM CURRENT - - - - - - 2.5 AMPERES

  • A-C GETTER CURRENT

    50 A

    A-C GETTER CURRENT - - - - - - 50 AMPERES

  • FOCUS-ELECTRODE VOLTAGE

    500 VOLTS

    FOCUS-ELECTRODE VOLTAGE - - - - - - -500 VOLTS

  • COLLECTOR DISSIPATION

    60 KILOWATTS

    COLLECTOR DISSIPATION - - - - - - 60 KILOWATTS

  • Frequency

    735 megacycles

    Frequency - 610 735 megacycles

  • Output Power

    15.6 kilowatts

    Output Power - 12.6 15.6 kilowatts

  • Driving Power

    0.3 watts

    Driving Power - 10 0.30 watts

  • D-C Beam Current

    203 amperes

    D-C Beam Current - 2.03 2,03 amperes

  • Focus-Electrode Voltage

    200 volts

    Focus-Electrode Voltage - -200 -200 volts

  • Prefocus Coil

    1.15 amperes

    Prefocus Coil - 1.15 1.15 amperes

  • Collector Coil in Series

    2.3 amperes

    Collector Coil in Series 2.3 2.3 amperes

  • CATHODE TERMINAL A

    65.2 A

    CATHODE TERMINAL A 63.700 | 65.20

  • SECOND CAVITY—— o TYR

    775 SECOND

    SECOND CAVITY—— o TYR 4 AK 670 | .775

  • _bm €A

    85 A

    _bm €A 75° 85°

  • Efoc *

    200 VOLTS

    Efoc * -200 VOLTS

  • Ip =

    203 AMPERES

    Ip =203 AMPERES

  • Py =

    10 WATTS

    Py = 10 WATTS

  • ACROSS COLLECTOR COOLANT INLET TEMPERATURE

    25 °C

    ACROSS COLLECTOR COOLANT INLET TEMPERATURE 25°C

  • /s a

    60 a

    /s a 60|% ETHYLENE-{GLYCOU -

  • Ip =

    203 AMPERES

    Ip = 203 AMPERES

  • Pg =

    0.3 WATTS

    Pg = 0.3 WATTS

  • Efoc =

    200 VOLTS

    Efoc =-200 VOLTS

  • FREQUENCY =

    700 MEGACYCLES

    FREQUENCY = 700 MEGACYCLES

  • FREQUENCY *

    700 MEGACYCLES

    FREQUENCY * 700 MEGACYCLES