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Voltage - Triode (single) ·Triode

6946

Rugged subminiature medium-mu triode developed for guided-missile and other severe-environment general-purpose electronic service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B8D
Base pins
8
Nominal heater
6.3 V / 175 mA

Description

Guided-missile subminiature medium-mu triode for rugged general-purpose service.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B8D
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
175 mA
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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0038 S
Amplification factor
16.5
Max plate voltage
250 V
Max plate dissipation
1.5 W
Max cathode current
15 mA

Published source ratings/characteristics promoted where applicable; identical repeated sections compressed.

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

  • Transconductance

    3800 µS

  • Amplification Factor

    16.5

Other

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    1.5 W

  • Maximum Cathode Current

    15 mA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    175 mA

    Nominal

  • Plate voltage

    250 V

    Published operating table; OperatingPoint1

  • Plate voltage

    100 V

    Published operating table; OperatingPoint1

  • Maximum altitude

    80000 ft

  • Maximum neutron total dosage

    10000000000000000 n/cm2

    Radiation

  • Maximum neutron dose rate

    1000000000000 n/cm2/s

    Radiation

Characteristic

  • Plate current

    9 mA

    Published operating table; OperatingPoint1

  • Transconductance

    3800 uS

    Published operating table; OperatingPoint1

Data set 03

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

    175 mA

    Nominal

  • Maximum plate voltage

    250 V

    Promoted published value

  • Maximum plate dissipation

    1.5 W

    Promoted published value

  • Maximum cathode current

    15 mA

    Promoted published value

  • DC PLATE VOLTAGE

    250 V

    MAXIMUM RATINGS

  • PEAK-PLATE FORWARD VOLTAGE

    360 V

    MAXIMUM RATINGS

  • PLATE DISSIPATION

    1.5 W

    MAXIMUM RATINGS

  • DC CATHODE CURRENT

    15 mA

    MAXIMUM RATINGS

  • GRID CIRCUIT RESISTANCE

    1 ohm

    MAXIMUM RATINGS

  • BULB TEMPERATURE

    250 C

    MAXIMUM RATINGS

  • ALTITUDE-ABSOLUTE MAXIMUM

    80000 mA

    SPECIAL TESTS AND RATINGS

Characteristic

  • Transconductance

    3800 uS

    Promoted published value

  • Amplification factor

    16.5

    Promoted published value

  • LIMITS OF APPLIED VOLTAGE 5.5 TO

    6.9 V

    AVERAGE CHARACTERISTICS 6.3 VOLTS 175 mA

  • DC PLATE VOLTAGE

    100 V

    CHARACTERISTICS

  • DC PLATE CURRENT

    9 mA

    CHARACTERISTICS

  • AMPLIFICATION FACTOR 1b.5

    5 A

    CHARACTERISTICS

  • DC GRID VOLTAGE FOR ly =

    -17.5 V

    CHARACTERISTICS

  • DC GRID VOLTAGE FOR Ib =

    -8.5 V

    CHARACTERISTICS