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Voltage Pentode or Tetrode (under 100V) ·Pentode

6008

Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 5911 in manufacturer literature. Its filamentary cathode and compact construction suit miniature signal-amplifier applications rather than power-output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
512-AX
Socket code
B9A
Base pins
9
Nominal heater
0.625 V / 13.3 mA

Description

6008 is a Pentode device. Radiation-cooled directly heated miniature voltage-amplifier pentode; source co-designates 6008/5911.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
512-AX
Socket code
B9A
Base pins
9
Nominal heater voltage
0.625 V
Nominal heater current
13.3 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

512-AX - 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
4000000 Ω
Transconductance
0.0001 S
Max plate voltage
45 V
Max screen voltage
45 V
Max plate dissipation
0.0015 W

Directly heated sharp-cutoff pentode.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Typical plate voltage

    22.5 V

  • Typical screen-grid voltage

    18 V

  • Typical plate current

    50 uA

  • Filament voltage minimum

    0.45 V

Characteristics

  • Transconductance

    100 uS

Data set 02

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Grid-to-plate capacitance

    0.2 pF

  • Output capacitance

    1.5 pF

  • Plate resistance

    0.4 MOhm

Other

  • Maximum plate voltage

    45 V

  • Maximum plate dissipation

    1.5 mW

  • Control-grid voltage

    -0.2 V

  • Screen-grid voltage

    45 V

  • Plate current

    50 uA

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Input capacitance

    1.5 pF

  • Output capacitance

    1.5 pF

  • Grid-to-plate capacitance

    0.24 pF

Other

  • Plate voltage

    22.5 V

    ClassA

  • Screen voltage

    18 V

    ClassA

  • Control-grid bias

    -1.15 V

    ClassA

  • Plate current

    0.05 mA

    ClassA

  • Screen current

    0.01 mA

    ClassA

  • Plate resistance

    4000000 ohm

    ClassA

  • Transconductance

    100 uS

    ClassA

Data set 04

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Grid-to-plate capacitance

    0.2 pF

  • Input capacitance

    1.5 pF

Other

  • Plate voltage

    45 V

  • Grid voltage

    -0.2 V

  • Screen voltage

    45 V

  • Output power

    2.25 mW

Characteristic

  • Transconductance

    50 uS

  • Plate resistance

    0.4 MOhm