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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6943

Rugged subminiature sharp-cutoff RF pentode designed for guided-missile service under high altitude, shock, vibration, and high temperature. It combines compact RF amplification with exceptional environmental durability.

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

Description

Rugged subminiature sharp-cutoff RF pentode for guided-missile service under high altitude, shock, vibration, and high temperature. Electrical ratings, characteristics, operating data, and special environmental information were extracted from the supplied source.

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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
300000 Ω
Transconductance
0.0036 S
Max plate voltage
250 V
Max screen voltage
150 V
Max plate dissipation
1 W
Max screen dissipation
0.33 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

Pentode

Characteristic

  • Transconductance

    3600 µS

Other

  • Maximum Plate Voltage

    250 V

  • Maximum Screen Voltage

    150 V

  • Maximum Plate Dissipation

    1 W

  • Maximum Screen Dissipation

    0.33 W

  • Maximum Cathode Current

    15 mA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    175 mA

    Nominal

  • Plate voltage

    360 V

    Published operating table; OperatingPoint1

  • Plate voltage

    250 V

    Published operating table; OperatingPoint1

  • Plate voltage

    100 V

    Published operating table; OperatingPoint1

  • Screen 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

    8 mA

    Published operating table; OperatingPoint1

  • Plate current

    8 mA

    Published operating table; OperatingPoint1

  • Transconductance

    3600 uS

    Published operating table; OperatingPoint1

  • Plate resistance

    300000 ohm

    Published operating table; OperatingPoint1

  • Plate resistance

    300000 ohm

    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

Pentode

Characteristics

  • HEATER VOLTAGE

    6.3 V

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

  • HEATER VOLTAGE VARIATION — published value 1

    6.3 V

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

  • HEATER VOLTAGE VARIATION — published value 2

    10 V

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

  • INSTANTANEOUS PLATE VOLTAGE

    360 V

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

  • PLATE VOLTAGE

    250 V

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

  • GRID #2 VOLTAGE

    150 V

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

  • PLATE DISSIPATION

    1

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

  • GRiD #2 DISSIPATION

    0.33

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

  • POSITIVE GRID #1 VOLTAGE

    0 V

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

  • NEGATIVE GRID #1 VOLTAGE

    55 V

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

  • EXTERNAL GRID #1 CIRCUIT RESISTANCE

    7

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

  • AVERAGE CATHODE CURRENT

    15 mA

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

  • HEATER-CATHODE VOLTAGE

    200 V

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

  • BULB TEMPERATURE (AT HOTTEST POINT)

    250 C

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

  • OPERATIONAL ALTITUDE

    80000

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

  • HEATER CURRENT

    175 mA

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

  • PLATE VOLTAGE

    100 V

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

  • GRID #2 VOLTAGE

    100 V

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

  • GRID #3 VOLTAGE

    0

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

  • CATHODE BIAS RESISTOR

    150 ohm

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

  • PLATE CURRENT

    8 mA

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

  • GRID #2 CURRENT

    2.3 mA

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

  • TRANSCONDUCTANCE

    3600 uS

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

  • PLATE RESISTANCE

    300000 ohm

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

  • GRID #1 VOLTAGE FOR Ib = 10µA

    7.5 V

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

  • GRID #1 VOLTAGE FOR Ib = 200 µA

    5.5 V

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

  • VIBRATIONAL ACCELERATION FOR AN EXTENDED PERIOD4

    10

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

  • WHITE NOISE VIBRATION OUTPUT

    350 mA

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

  • LIMITS OF APPLIED VOLTAGE — published value 1

    5.5 V

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

  • LIMITS OF APPLIED VOLTAGE — published value 2

    6.9 V

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

  • DC PLATE VOLTAGE

    250 V

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

  • PEAK -PLATE FORWARD VOLTAGE

    360 V

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

  • DC GRID 2 VOLTAGE

    150 V

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

  • GRID 2 DISSIPATION

    0.33 W

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

  • CATHODE CURRENT

    15 mA

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

  • GRID 1 CIRCUIT RESISTANCE

    1 Mohm

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

  • BULB TEMPERATURE

    250 C

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

  • DC PLATE VOLTAGE

    100 V

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

  • DC GRID 3 VOLTAGE

    0 V

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

  • DC GRID 2 VOLTAGE

    100 V

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

  • DC PLATE CURRENT

    8 mA

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

  • DC GRID 2 CURRENT

    2.3 mA

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

  • DC GRID 1 VOLTAGE FOR I = 100 µADC MAX.

    -7.5 V

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

  • Plate resistance

    300000 ohm

    Promoted section value from the supplied datasheet.

  • Transconductance

    0.0036 A/V

    Promoted section value from the supplied datasheet.

Other

  • ALTITUDE -ABSOLUTE MAXI MUM

    80000

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

  • Maximum plate voltage

    250 V

    Promoted section value from the supplied datasheet.

  • Maximum screen voltage

    150 V

    Promoted section value from the supplied datasheet.

  • Maximum plate dissipation

    1 W

    Promoted section value from the supplied datasheet.

  • Maximum screen dissipation

    0.33 W

    Promoted section value from the supplied datasheet.