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Voltage - Dual Triode (similar) ·Triode-Triode

7044

High-current double triode designed for electronic computers, particularly high-speed cathode-follower, switching, and pulse-amplifier service, with substantial peak-current and pulse-voltage capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9M
Socket code
B9A
Base pins
9
Nominal heater
12.6 V / 450 mA

Description

THE 7044 IS A DOUBLE TRIODE DESIGNED FOR USE IN ELECTRONIC COMPUTERS. THE

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9M
Socket code
B9A
Base pins
9
Nominal heater voltage
12.6 V
Nominal heater current
450 mA
Parallel heater voltage
6.3 V
Parallel heater current
900 mA
Series capable
Yes

9M - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1P1AP — Plate (Anode)

EIA source designation P1; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 9M

PIN3KAK — Cathode

EIA source designation K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 9M

PIN4H—H — Heater

EIA source designation H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 9M

PIN5H—H — Heater

EIA source designation H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 9M

PIN7P2BP — Plate (Anode)

EIA source designation P2; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 9M

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
1750 Ω
Transconductance
0.012 S
Amplification factor
21
Max plate voltage
300 V
Max plate dissipation
4.5 W
Max cathode current
50 mA

Representative row for two identical computer-control triodes.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
1750 Ω
Transconductance
0.012 S
Amplification factor
21
Max plate voltage
300 V
Max plate dissipation
4.5 W
Max cathode current
50 mA

Second physical triode section; electrically identical twin section.

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

Triode

Other

  • Heater Current Series 410 450

    490 mA

    Heater Current Series 410 450 490 mA

  • Heater Current Parallel 820 900

    980 mA

    Heater Current Parallel 820 900 980 mA

  • Plate Resistance p/ps

    1750 Ω

    Plate Resistance p/ps 1750 ohms

  • Note 2: The plate dissipation of one section may be as great as

    4.5 W

    Note 2: The plate dissipation of one section may be as great as 4.5 watts provided that the maximum dissipation for both sections

  • does not exceed

    8 W

    does not exceed 8.0 watts.

  • exceed

    200 V

    exceed 200 volts and the maximum positive DC heater with respect to cathode voltage shall never exceed +100 Vdc.

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    12.6 V

  • Heater Current

    450 mA

Data set 03

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    High-speed computer cathode follower

Other

  • Peak cathode current

    400 mA

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    12.6 V

    Nominal

  • Heater current

    450 mA

    Nominal

  • Maximum peak plate voltage

    600 V

    Plate-to-cathode

  • Maximum average total plate dissipation both units

    8 W

    BothSections

  • Maximum average positive grid current

    5 mA

    PerSection

  • Maximum peak positive grid current

    200 mA

    PerSection

  • Maximum peak cathode current

    400 mA

    PerSection

Characteristic

  • Heater power

    5.7 W

    SeriesOrParallel

Capacitance

  • Grid to plate

    6 pF

    Per identical triode

  • Input capacitance

    4.8 pF

    Per identical triode

  • Output capacitance

    0.65 pF

    Per identical triode

  • Heater to cathode

    6 pF

    Per identical triode

  • Grid 1 to grid 2

    0.1 pF

    Cross-section

  • Plate 1 to plate 2

    1.4 pF

    Cross-section

Data set 05

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Series heater voltage

    12.6 V

    SeriesHeater

  • Series heater current

    450 mA

    SeriesHeater

  • Parallel heater voltage

    6.3 V

    ParallelHeater

  • Parallel heater current

    900 mA

    ParallelHeater

Other

  • Peak cathode current maximum

    110 mA

Application

  • Application

    Computer switching / pulse amplifier

Data set 06

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    900 mA

    Nominal

  • Maximum plate voltage

    300 V

    Promoted published value

  • Maximum plate dissipation

    4.5 W

    Promoted published value

  • Maximum cathode current

    50 mA

    Promoted published value

  • HEATER VOLTAGE 12.6±5% 6.3±5% VOLTS

    5 V

    RATINGS

  • HEATER CURRENT

    900 mA

    RATINGS

  • MAXIMUM AVERAGE PLATE VOLTAGE D

    300 V

    RATINGS

  • HEATER VOLTAGE 12.615% 6.315% VOLTS

    6.315 V

    RATINGS - CONT~o.

  • MAXIMUAI AVERAGE CATHODE CURRENTO

    50 mA

    RATINGS - CONT~o.

  • "+1AXIMUM PEAK CATHODE CURRENT

    400 mA

    RATINGS - CONT~o.

  • HEATER VOLTAGE (SERIES) 12.6±5% VOLTS

    5 V

    INITIAL CHARACTERISTICS LIMITS

  • HEATER VOLTAGE (PARALLEL) 6.315% VOLTS

    6.315 V

    INITIAL CHARACTERISTICS LIMITS

  • HEATER CURRENT (SERIES)

    450 mA

    INITIAL CHARACTERISTICS LIMITS

  • HEATER CURRENT (PARALLEL)

    900 mA

    INITIAL CHARACTERISTICS LIMITS

  • HEATER CURRENT @ Ef=

    490 V

    INITIAL CHARACTERISTICS LIMITS

Data set 07

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage series

    12.6 V

  • Heater current series

    450 mA

  • Heater voltage parallel

    6.3 V

  • Heater current parallel

    900 mA

  • Plate voltage

    120 V

    EachSection

  • Plate current

    36 mA

    EachSection

  • Average plate voltage maximum

    300 V

    EachSection

  • Peak positive pulse plate voltage

    600 V

    Pulse

  • Average cathode current

    50 mA

    EachSection

  • Peak cathode current

    400 mA

    Pulse

  • Plate dissipation each section

    4.5 W

    EachSection

  • Total plate dissipation both sections

    8 W

    BothSections

Characteristic

  • Plate resistance

    1750 ohm

    EachSection

  • Transconductance

    12000 uS

    EachSection

  • Amplification factor

    21

    EachSection