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Voltage Pentode or Tetrode (under 100V) ·Diode-Pentode

1DN5

Battery diode-pentode combining radio detection with remote-cutoff amplification. The diode provides signal or AVC rectification while the controlled-cutoff pentode supports gain-controlled receiver amplification in portable equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
6BW
Socket code
B7G
Base pins
7
Nominal heater
1.4 V / 50 mA

Description

1DN5 is a DiodePentode device. Combined detector diode and remote-cutoff pentode with common directly heated filament for portable audio/AVC service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6BW
Socket code
B7G
Base pins
7
Nominal heater voltage
1.4 V
Nominal heater current
50 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

6BW - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN11G3AG3 — Suppressor GridGroup 6BW1

Source code 1G3; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

PIN1F—F — FilamentGroup 6BW1

Source code F; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

PIN21PAP — Plate (Anode)

Source code 1P; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

PIN31G2AG2 — Screen Grid

Source code 1G2; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

PIN42PBP — Plate (Anode)

Source code 2P; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

PIN61G1AG1 — Control Grid

Source code 1G1; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

PIN7F—F — Filament

Source code F; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 128, 6BW

Section ratings

2 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances
Max cathode current
0.25 mA

Detector diode; cross-section diode-plate-to-pentode-grid capacitance is published.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
600000 Ω
Transconductance
0.00063 S
Max plate voltage
90 V
Max screen voltage
90 V
Max cathode current
3 mA

Remote-cutoff pentode section; typical condition at 67.5 V plate.

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

Diode

Capacitance

  • DiodePlateToControlGridCapacitance

    0.04 pF

    CrossSection;Maximum

Other

  • MaximumDiodeCurrentContinuous

    0.25 mA

    ContinuousOperation

Characteristic

  • Average Diode Current

    1 mA

    DcApplied=40V

SECTION 2

Pentode

Other

  • Filament Voltage

    1.4 V

    Nominal

  • Filament Current

    50 mA

    Nominal

  • Plate Voltage

    67.5 V

    Typical

  • Screen Voltage

    67.5 V

    Typical

  • Grid1 Voltage

    0 V

    Typical

  • Plate Current

    2.1 mA

    Typical

  • Screen Current

    0.55 mA

    Typical

  • MaximumNegativeGrid4Voltage

    -50 V

  • MaximumPositiveGrid4Voltage

    0 V

Characteristic

  • Transconductance

    630 uS

    Typical

  • Grid4VoltageForTransconductance40uS

    -11.5 V

    Typical

  • Plate Resistance

    600000 ohm

    Typical

Data set 02

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Maximum continuous diode current

    - to 0.25 mA

SECTION 2

Pentode

Other

  • Filament voltage

    1.4 V

  • Filament current

    50 mA

  • Plate voltage

    45 V

    AudioAmplifier

  • Screen voltage

    45 V

    AudioAmplifier

Data set 03

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Average diode current at 10 V DC

    1 mA

SECTION 2

Pentode

Other

  • Plate voltage

    67.5 V

    ClassA

  • Screen voltage

    67.5 V

    ClassA

  • Plate current

    2.1 mA

    ClassA

  • Screen current

    0.55 mA

    ClassA

Characteristic

  • Plate resistance

    600000 ohm

    ClassA

  • Transconductance

    630 uS

    ClassA