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Specialized - Traveling Wave ·TravelingWave

N1047M

Low-noise 2.7–3.2 GHz traveling-wave amplifier providing about 24–27 dB gain, with a noise figure around 4.5 dB.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5.25 V / 3 A

Description

Low noise travelling wave tube for use in the input stage of radar and other microwave receivers, and in i.f. amplifier service. The tube is contained in a metal canister and is fitted with coaxial input and output connectors. A separate focusing solenoid is required. Frequencyrange . . . . . . . . . . . . 27t03.2 GHz Saturation outputpower . . . . . . . . . . . 15b mw Noisefactor . . . . . . . . . . . . . . . 40 db Low levelgain . . . . . . . . . . . . . . 24 db Recommended solenoid . . . . . . . . . . . . . . . N4Oo41

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
5.25 V
Nominal heater current
3 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

TravelingWave

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Microwave/special-function section; schema has no directly applicable promoted electrode fields; published electrical data preserved in 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

1971 English Electric Valve

Published operating points and test conditions from this source.

SECTION 1

TravelingWave

Other

  • Frequencyrange

    3.2 GHz

    Frequencyrange . . . . . . . . . . . . 27t03.2 GHz

  • Low levelgain

    24 db

    Low levelgain . . . . . . . . . . . . . . 24 db

  • Heater current

    3 A

    Heater current . . . . . < . . . . . . . 03 A

  • Heater starting current (peak)

    40 S

    Heater starting current (peak) S .. . . 40 A max

  • Collector voltage

    1100

    Collector voltage 400 1100

  • Collector current

    200

    Collector current - 200

  • Helix voltage

    500

    Helix voltage . - 500

  • Grid 4 voltage

    500

    Grid 4 voltage — 500

  • Grid 3 voltage

    150

    Grid 3 voltage - 150

  • Grid 1 and 2 voltage

    20

    Grid 1 and 2 voltage 20

  • Heater voltage

    5.25

    Heater voltage 4.75 5.25

  • Heater voltage

    50

    Heater voltage 50

  • Collector current

    130

    Collector current 130

  • Helix voltage (see notes 6 and 7)

    375

    Helix voltage (see notes 6 and 7) 375

  • Magnetic field (see notes 9 and 10) -

    140

    Magnetic field (see notes 9 and 10) - 140 mT

  • Grid 4 current

    1

    Grid 4 current less than 1 UA

  • Grid 3 current

    1 MA

    Grid 3 current less than 1 MA

  • Grid 1 and 2 current

    50 MA

    Grid 1 and 2 current 50 MA

  • Gain

    24 db

    Gain e e e 24 db

  • Output power (saturated)

    1.6

    Output power (saturated) 1.6 mwW

  • input signal, vary grid 3 and grid 4 voltages alternately until the

    4

    input signal, vary grid 3 and grid 4 voltages alternately until the

  • are those which will operate the N1047M at the lowest noise factor for

    1047

    are those which will operate the N1047M at the lowest noise factor for

  • the adjustment above. Grid 3 and grid 4 voltages should be stabilized

    4

    the adjustment above. Grid 3 and grid 4 voltages should be stabilized

  • Grid 1 and 2 voltage is adjusted to give the correct collector current and

    2

    Grid 1 and 2 voltage is adjusted to give the correct collector current and

  • 06

    6 A

    06 A L ]HELIX VOLTAGE OPTIMIZED

  • COLLECTOR CURRENT 130pA

    130

    COLLECTOR CURRENT 130pA

  • [ 388

    130 A

    [ 388 { [ T] COLLECTOR CURRENT 130 A

  • T FREQUENCY 29GHz

    29

    T FREQUENCY 29GHz

  • g HELIX VOLTAGE 3B v

    3 v

    g HELIX VOLTAGE 3B v

  • COLLECTOR CURRENT 130 pA

    130

    COLLECTOR CURRENT 130 pA

  • FREQUENCY

    2.9

    FREQUENCY 2.9GHz

  • ™ 660

    660

    ™ 660 HELIX VOLTAGE OPTIMIZED

  • FREQUENCY

    2.9 GHz

    FREQUENCY 2.9 GHz

  • Grid 1 and 2

    2

    Grid 1 and 2

  • Grid 4

    4

    Grid 4

  • Grid 3

    3

    Grid 3

Characteristic

  • (Over the frequency range 2.7 to 3.2GHz}

    3.2

    (Over the frequency range 2.7 to 3.2GHz}

  • Helix voltage (see notes 6 and 7)

    400

    Helix voltage (see notes 6 and 7) 350 to 400 \

  • Magnetic field (see notes 9 and 10)

    7

    Magnetic field (see notes 9 and 10) . 140+7 mT

  • Heater current

    0.5

    Heater current 0.2 0.5

  • Helix current

    5 MA

    Helix current . 5 MA

  • Grid 4 current

    10 MA

    Grid 4 current 10 MA

  • Grid 3 current

    10 MA

    Grid 3 current 10 MA

  • Grid 1 and 2 current

    100

    Grid 1 and 2 current 100 LA

  • Gain

    27 db

    Gain 21 27 db

  • Noise factor

    4.5 db

    Noise factor ... 4.5 db

  • Output power (saturated)

    1

    Output power (saturated) 1.0 - mwW

  • 1. The time between the application of full heater voltage a

    1

    1. The time between the application of full heater voltage and the appli-

  • helix

    10

    helix. Fluctuations in collector voltage should be less than +10%.

  • time of at least 2 minutes, switch on the h.t. voitage with grid 1 and 2

    2

    time of at least 2 minutes, switch on the h.t. voitage with grid 1 and 2