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Voltage Pentode ·Pentode

7433

Reliable subminiature pentode with flying leads for guided-weapon equipment. Manufacturer documentation emphasizes severe vibration capability and dependable miniature signal operation for demanding military electronic systems.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
B8D/F
Socket code
SUBMINIATURE8
Base pins
8
Nominal heater
6.3 V / 200 mA

Description

Reliable subminiature pentode with flying leads for guided-weapon equipment.

Socket description

Subminiature 8-lead base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B8D/F
Socket code
SUBMINIATURE8
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

B8D/F - 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
Transconductance
0.0055 S
Amplification factor
28
Max plate voltage
350 V
Max screen voltage
350 V
Max plate dissipation
1.5 W
Max screen dissipation
1 W
Max cathode current
14 mA

Promoted values are taken directly from the supplied datasheet; additional ratings, characteristics and operating points are preserved in TUBE_SECTION_PARAMETER.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate supply voltage maximum

    350 V

  • Screen-grid supply voltage maximum

    350 V

Capacitance

  • Input capacitance

    5 pF

    ExternalShield

  • Output capacitance

    4.5 pF

    ExternalShield

  • Grid-to-plate capacitance maximum

    0.015 pF

    ExternalShield

Characteristics

  • Plate voltage

    100 V

  • Screen-grid voltage

    100 V

  • Control-grid voltage

    -2 V

  • Plate current

    7.5 mA

  • Screen-grid current

    2.5 mA

  • Transconductance

    5500 uS

  • Screen-to-control-grid amplification factor

    28 ratio

  • Maximum noise output voltage

    300 mV

    Vibration=20g;60-1000Hz