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Specialized - Magnetron ·Magnetron

2J51A

Air-cooled integral-magnet pulsed magnetron oscillator tunable from approximately 8.5–9.6 GHz with about 55 kW peak output.

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

Description

Air-cooled integral-magnet pulsed magnetron oscillator tunable from 8500 to 9600 MHz with approximately 55 kW peak output.

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
6.3 V
Nominal heater current
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

No fixed ratings are recorded for this section.

Published electrical section from 7256.pdf; identical repeated sections compressed when applicable.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Magnetron

Other

  • at a tunable frequency of 8500 to

    9600 MHz

    at a tunable frequency of 8500 to 9600 Mc. The peak power out-

  • Pre-heat Heater Current at

    6.3 V

    Pre-heat Heater Current at 6.3 Volts: 1,0 + 0.1 Amperes

  • Heater Cold Resistance

    1 Ω

    Heater Cold Resistance 1.0 ohms

  • Heater Vcltage

    7 V

    Heater Vcltage 7.0 Volts

  • Peak Anode Voltage

    16 kV

    Peak Anode Voltage 16,0 Kilovolts

  • Peak Anode Current

    15.5 A

    Peak Anode Current 15,5 Amperes

  • Average Power Output

    230 W

    Average Power Output 230 Watts

  • Pulse Duration

    3.4 µs

    Pulse Duration 3.4 Microseconds

  • Bate of Rise of Anode Voltage (above 85 % point)

    115 kV

    Bate of Rise of Anode Voltage (above 85 % point) 115 kv/us

  • Frequency

    9000 MHz

    Frequency 9000 Mc

  • Peak anode voltage

    13.8 kV

    Peak anode voltage 13.8 kv

  • Vibration (non-operating)

    50 Hz

    Vibration (non-operating) 50 cps @ 10G

Capacitance

  • Anode-Cathode Capacitance 4.0 to

    8 pF

    Anode-Cathode Capacitance 4.0 to 8,0 uuf

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Magnetron

Characteristic

  • powers of more than

    150 W

    powers of more than 150 W immediately after the applica-

  • The heater should be bypassed with a

    1000 V

    The heater should be bypassed with a 1000 V rated capac-

  • of the anode to keep its temperature below

    150 °C

    of the anode to keep its temperature below 150 °C under)

  • la température de 1'anode inférieure a

    150 °C

    la température de 1'anode inférieure a 150 °C pour toute

Other

  • maximum permissible anode temperature of

    150 °C

    maximum permissible anode temperature of 150 °C involves|