Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Magnetron ·Magnetron

4J73

Mechanically tunable high-power pulsed magnetron designed for radar and related short-pulse microwave service over its specified tuning range.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
16 V / 3.1 A

Description

Printed member of the 4J70-4J73 forced-air-cooled tunable pulsed-magnetron family.

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
16 V
Nominal heater current
3.1 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

Magnetron

X-ray radiationInterelectrode capacitances
Max plate voltage
30000 V
Max plate dissipation
700 W
Max cathode current
70 A

Published ratings and characteristics promoted where clearly applicable; additional source values retained as section 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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Magnetron

Characteristics

  • Heater or filament voltage

    16 V

    Published nominal/representative value

  • Heater or filament current

    3.1 A

    Published nominal/representative value

  • Mechanical tuning range

    3090 to 3260 MHz

    Published

  • Magnetic field strength

    2500 gauss

    Published

Other

  • Maximum plate dissipation

    700 W

    Published

  • RF power output

    350 W

    At 0.0006 duty cycle and 70 A

  • Maximum duty cycle

    0.001 fraction

    Published

  • Maximum pulse duration

    2.9 µs

    Published