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Voltage - Dual Triode (similar) ·Triode-Triode

6681

Industrial high-mu twin triode for mobile communications equipment, intended for phase-inverter and resistance-coupled voltage-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
12.6 V / 150 mA

Description

Industrial high-mu twin triode for phase-inverter and resistance-coupled amplifier service in mobile communications equipment.

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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
12.6 V
Nominal heater current
150 mA
Parallel heater voltage
6.3 V
Parallel heater current
300 mA
Series capable
Yes

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
62500 Ω
Transconductance
0.0016 S
Amplification factor
100
Max plate voltage
330 V
Max plate dissipation
1.1 W

Representative electrical row for repeated identical physical sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
62500 Ω
Transconductance
0.0016 S
Amplification factor
100
Max plate voltage
330 V
Max plate dissipation
1.1 W

Second physical triode restored under current one-row-per-physical-section policy.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Plate Resistance

    62500 ohm

  • Transconductance

    1600 µS

  • Amplification Factor

    100

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Plate Dissipation

    1.1 W

  • Heater Voltage Series

    12.6 V

  • Heater Current Series

    150 mA

  • Heater Voltage Parallel

    6.3 V

  • Heater Current Parallel

    300 mA

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    12.6 V

  • Heater Current

    150 mA

  • EquivalentType

    12AX7

    RenewalUse

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    12.6 V

    Nominal

  • Heater current

    150 mA

    Nominal

  • Plate voltage

    330 V

    Published operating table; OperatingPoint1

  • Plate voltage

    100 V

    Published operating table; OperatingPoint1

  • Plate voltage

    250 V

    Published operating table; OperatingPoint2

Characteristic

  • Plate current

    0.5 mA

    Published operating table; OperatingPoint1

  • Plate current

    1.2 mA

    Published operating table; OperatingPoint2

  • Transconductance

    1250 uS

    Published operating table; OperatingPoint1

  • Transconductance

    1600 uS

    Published operating table; OperatingPoint2

Data set 04

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater series voltage

    12.6 V

    SeriesHeater

  • Heater series current

    150 mA

    SeriesHeater

  • Heater parallel voltage

    6.3 V

    ParallelHeater

  • Heater parallel current

    300 mA

    ParallelHeater

  • Class-A plate resistance low point

    80000 ohm

    ClassA

  • Class-A transconductance low point

    1250 uS

    ClassA

  • Class-A plate resistance high point

    62500 ohm

    ClassA

  • Class-A transconductance high point

    1600 uS

    ClassA

  • Amplification factor

    100

Other

  • Plate voltage maximum

    330 V

  • Plate dissipation maximum

    1.1 W

  • Negative grid voltage maximum

    -55 V

  • Class-A plate voltage low point

    100 V

    ClassA

  • Class-A grid voltage low point

    -1 V

    ClassA

  • Class-A plate current low point

    0.5 mA

    ClassA

  • Class-A plate voltage high point

    250 V

    ClassA

  • Class-A grid voltage high point

    -2 V

    ClassA

  • Class-A plate current high point

    1.2 mA

    ClassA

Data set 05

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • AVERAGE VALUES —VOLTAGE — published value 1

    12.6 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • AVERAGE VALUES —VOLTAGE — published value 2

    6.3 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • —CURRENT — published value 1

    150 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • —CURRENT — published value 2

    300 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • VOLTAGE OPERATION — published value 1

    12.612 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • VOLTAGE OPERATION — published value 2

    5 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • VOLTAGE OPERATION — published value 3

    6.311 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • VOLTAGE OPERATION — published value 4

    3 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE VOLTAGE

    330 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • POSITIVE DC GRID VOLTAGE

    0 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • NEGATIVE DC GRID VOLTAGE

    55 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE DISSIPATION

    1.1 W

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE VOLTAGE — published value 1

    100 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE VOLTAGE — published value 2

    250 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • GRIG VOLTAGE — published value 1

    -1 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • GRIG VOLTAGE — published value 2

    -2 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE CURRENT — published value 1

    0.5 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE CURRENT — published value 2

    1.2 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • TRANSCONDUCTANCE — published value 1

    1250 uS

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • TRANSCONDUCTANCE — published value 2

    1600 uS

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • AMPLIFICATION FACTOR — published value 1

    100

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • AMPLIFICATION FACTOR — published value 2

    100

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

Data set 06

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    300 mA

    Nominal

  • Heater voltage series

    12.6 V

    Series

  • Heater current series

    150 mA

    Series

  • Heater voltage parallel

    6.3 V

    Parallel

  • Heater current parallel

    300 mA

    Parallel

  • Maximum plate voltage

    330 V

    Promoted published value

  • Maximum plate dissipation

    1.1 W

    Promoted published value

  • Plate Voltage

    250 V

    Characteristics, Class AI AmDllfier (Each Unit):

  • Grid Voltage

    -2 V

    Characteristics, Class AI AmDllfier (Each Unit):

  • Amplification Factor

    100 A

    Characteristics, Class AI AmDllfier (Each Unit):

  • Plate Resistance (Approx.)

    0.0625 megohm

    Characteristics, Class AI AmDllfier (Each Unit):

  • Transconductance

    1600 uS

    Characteristics, Class AI AmDllfier (Each Unit):

  • Plate Current

    1.2 mA

    Characteristics, Class AI AmDllfier (Each Unit):

  • PLATE VOLTAGE

    330 V

    AMPLIFIER — Class AI

  • PLATE DISSIPATION

    1.1 W

    AMPLIFIER — Class AI

  • to cathode

    200 V

    AMPLIFIER — Class AI

  • much as

    35 V

    AMPLIFIER — Class AI

Characteristic

  • Plate resistance

    62500 ohm

    Promoted published value

  • Transconductance

    1600 uS

    Promoted published value

  • Amplification factor

    100

    Promoted published value

  • Voltage

    20 V

Data set 07

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid to Plate

    1.7 pF

    Capacitance;PublishedValue1

  • Grid to Plate

    1.7 pF

    Capacitance;PublishedValue2

  • Grid to Cathode and Heater

    1.6 pF

    Capacitance;PublishedValue1

  • Grid to Cathode and Heater

    1.6 pF

    Capacitance;PublishedValue2

  • Plate to Cathode and Heater

    0.46 pF

    Capacitance;PublishedValue1

  • Plate to Cathode and Heater

    0.34 pF

    Capacitance;PublishedValue2

Other

  • Plate Voltage

    330 V

    MaximumRatings

  • Negative-bias value

    55 V

    MaximumRatings

  • Positive-bias value

    0 V

    MaximumRatings

  • Plate Dissipation

    1.1 W

    MaximumRatings

Characteristic

  • Plate Voltage

    100 V

    Characteristics;PublishedValue1

  • Plate Voltage

    250 V

    Characteristics;PublishedValue2

  • Grid Voltage

    1 V

    Characteristics

  • Plate Resistance (Approx.)

    80000 ohm

    Characteristics;PublishedValue1

  • Plate Resistance (Approx.)

    62500 ohm

    Characteristics;PublishedValue2

  • Plate Current

    0.5 mA

    Characteristics;PublishedValue1

  • Plate Current

    1.2 mA

    Characteristics;PublishedValue2