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Specialized - Klystron ·Klystron

3K20000LK

Eimac UHF television power-amplifier klystron covering approximately 720–890 MHz for high-power visual broadcast service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
9 V / 39 A

Description

The EIMAC 3K20000LK is a 720–890 MHz UHF television power-amplifier klystron.

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
9 V
Nominal heater current
39 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
Max cathode current
1.7 A

Klystron electron-beam section. Schema has no beam-voltage/collector-dissipation promoted fields; those published ratings are preserved below as parameters. MaxCathodeCurrent uses published maximum beam current where available.

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

  • Maximum DC beam voltage

    14000 V

  • Maximum DC beam current

    1.7 A

  • Maximum collector dissipation

    20000 W

  • power gain of approximately 20 db. The cavities of the Eimac UHF ftelevision

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  • PnvnngoP(;wel; (approximately)® - - 33:3*! Lflrfl's tion. The output power is useful power measured in a load circuit.

    -

  • of power gains of about 13 db and efficiencies of

    -

  • as 1939,! its application to high-power generation was capable of power gains of about 20 to 30 db, and

    -

  • drift-tube walls.) If the tube is used as a linear Considering now the power gain, this becomes less as

    -

  • Considering the power gain of a klystron, this is band frequency, and loaded for optimum performance

    -

  • OUTPUT POWER

    -

  • Fig. 3—Output power versus driving power for klystron.

    -

  • (independent of output power). This is the efficiency at the ENVELOPE OF MAX. EFFICIENCIES FOR

    -

  • about 5 mc and the power gain, under television condi- to achieve the necessary bandwidth.

    -

  • the useful frequency range of a given tube, even if the it is evident that the klystron scores heavily in all re-

    -

  • power gain. Also, the construction of a klystron stage is

    -