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Voltage Pentode or Tetrode (under 100V) ·Pentode

5911

Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 6008 in manufacturer literature. It is intended for compact signal-amplifier service using a filamentary cathode rather than conventional indirectly heated construction.

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

Description

5911 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
-
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

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
400000 Ω
Transconductance
0.00005 S
Max plate voltage
45 V
Max plate dissipation
0.0015 W

Electrical values extracted from the supplied source table; typical operating values 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

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 02

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