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7434

Reliable subminiature low-noise-output pentode with flying leads for guided-weapon equipment. It combines reduced noise, miniature construction, and severe-vibration capability for sensitive signal stages in demanding military electronics.

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 low-noise-output 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: 0.0031 S
Amplification factor: 28
Max plate voltage: 350 V
Max screen voltage: 350 V
Max plate dissipation: 1 W
Max screen dissipation: 0.4 W
Max cathode current: 12 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
3.8 pF
ExternalShield
Output capacitance
4.4 pF
ExternalShield
Grid-to-plate capacitance maximum
0.3 pF
ExternalShield

Characteristics

Plate voltage
100 V
Screen-grid voltage
100 V
Control-grid voltage
-1.4 V
Plate current
7 mA
Screen-grid current
2.4 mA
Transconductance
3100 uS
Screen-to-control-grid amplification factor
28 ratio
Maximum noise output voltage
200 mV
Vibration=20g;60-1000Hz