6418

Directly heated subminiature low-power pentode. Manufacturer operating tables document compact signal-amplifier service with low heater demand, making it suitable for miniature equipment where power consumption and physical size are constrained.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B5D
Base pins: 5
Nominal heater: 1.25 V / 10 mA

Description

Directly heated subminiature low-power pentode.

Socket description

Subminiature wire-ended

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B5D
Base pins: 5
Nominal heater voltage: 1.25 V
Nominal heater current: 10 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: 420000 Ω
Transconductance: 0.0003 S
Max plate voltage: 30 V
Max screen voltage: 30 V
Max plate dissipation: 0.05 W
Max screen dissipation: 0.01 W
Max cathode current: 0.5 mA

Promoted source ratings/characteristics; 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
1.25 V
Nominal
Heater current
10 mA
Nominal
Plate voltage
15 V
Published operating table; OperatingPoint1
Plate voltage
22.5 V
Published operating table; OperatingPoint2
Screen voltage
30 V
Published operating table; OperatingPoint1
Screen voltage
15 V
Published operating table; OperatingPoint1
Screen voltage
22.5 V
Published operating table; OperatingPoint2

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater/filament voltage
1.25 V
Heater/filament current
10 mA

Application

Application summary
Directly heated subminiature low-power pentode.

Characteristic

Plate voltage
15 V
Screen voltage
15 V
Plate current
100 uA
Transconductance
190 uS
Power output
0.6 mW
Plate voltage high-output point
22.5 V
Power output high point
2.2 mW