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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

DL92

Directly heated output pentode designed for low-frequency power amplification. Its filamentary construction supports battery-operated receiver audio stages requiring useful output with low heater demand.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
B7G
Socket code
B7G
Base pins
7
Nominal heater
1.4 V / 100 mA

Description

Directly heated output pentode for low-frequency power amplification; co-designated DL92.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B7G
Socket code
B7G
Base pins
7
Nominal heater voltage
1.4 V
Nominal heater current
100 mA
Parallel heater voltage
1.4 V
Parallel heater current
100 mA
Series capable
Yes

B7G - 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
100000 Ω
Transconductance
0.00157 S
Max plate voltage
90 V
Max screen voltage
90 V
Max plate dissipation
0.7 W
Max screen dissipation
0.15 W
Max cathode current
12 mA

Published ratings and characteristics promoted from the approved French source.

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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    90 V

    ParallelFilament

  • Screen Voltage

    67.5 V

  • Plate Current

    7.4 mA

    ParallelFilament

  • Power Output

    270 mW

    ParallelFilament

Characteristic

  • Transconductance

    1580 µS

    ParallelFilament

  • Plate Resistance

    100000 ohm

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    1.4 V

  • HeaterOrFilamentCurrent

    50 mA

  • FilamentConnectionOptions

    Series;Parallel;SingleSection

  • FilamentSectionVoltage

    1.4 V

  • Plate To Grid Capacitance

    0.2 pF

  • Input Capacitance

    3 pF

  • Output Capacitance

    5 pF

Other

  • Power Output

    200 mW

    ClassA

  • Power Output

    400 mW

    PushPull

Data set 03

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Plate-to-Grid Capacitance

    <0.4 pF

    PublishedCapacitance

  • Input Capacitance

    4.35 pF

    PublishedCapacitance

  • Output Capacitance

    6 pF

    PublishedCapacitance

Characteristic

  • Plate Voltage

    90 V

    ParallelFilament

  • Screen Voltage

    67.5 V

    ParallelFilament

  • Control Grid Voltage

    -7 V

    ParallelFilament

  • Plate Current

    7.4 mA

    ParallelFilament

  • Screen Current

    1.4 mA

    ParallelFilament

  • Transconductance

    1570 uS

    ParallelFilament

  • Screen-to-Control-Grid Mu

    5

    ParallelFilament

  • Plate Resistance

    100 kohm

    ParallelFilament

Other

  • Plate Voltage

    90 V

    PublishedLimits

  • Plate Dissipation

    0.7 W

    PublishedLimits

  • Screen Voltage

    90 V

    PublishedLimits

  • Screen Dissipation

    0.15 W

    PublishedLimits

  • Cathode Current

    12 mA

    PublishedLimits

  • Power Output

    235 mW

    ClassA;SeriesFilament;90V

  • Power Output

    270 mW

    ClassA;ParallelFilament;90V

  • Power Output

    780 mW

    PushPull;TwoTubes;90V

Data set 04

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Power Output

    0.235 W

    ClassA;OneTube;Plate 90 V

Data set 05

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Anode voltage

    90 V

    ClassA

  • Screen-grid voltage

    67.5 V

    ClassA

  • Anode current

    7.4 mA

    ClassA

  • Screen-grid current

    1.4 mA

    ClassA

  • Output power

    270 mW

    ClassA

  • Optimum load resistance

    8 kOhm

    ClassA