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

DL94

Centre-tapped-filament miniature battery output pentode. Its compact construction and flexible filament arrangement support low-frequency power amplification in portable receiving equipment.

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

Description

Centre-tapped-filament miniature battery output pentode.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Miniature
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

Miniature - 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
110000 Ω
Transconductance
0.002 S
Max plate voltage
150 V
Max screen voltage
150 V
Max plate dissipation
1.2 W
Max screen dissipation
0.45 W
Max cathode current
12 mA

Published ratings and characteristics promoted from the approved German 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

    90 V

  • Plate Current

    9.5 mA

    ParallelFilament

  • Power Output

    270 mW

    ParallelFilament

Characteristic

  • Transconductance

    2150 µS

    ParallelFilament

  • Plate Resistance

    100000 ohm

Data set 02

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum Plate Voltage

    150 V

  • Maximum Screen Voltage

    150 V

  • Maximum Plate Dissipation

    1.2 W

  • Maximum Screen Dissipation

    0.45 W

  • Maximum Cathode Current

    12 mA

Data set 03

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

    500 mW

    PushPull

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Anode voltage

    120 V

    ClassA

  • Screen-grid voltage

    120 V

    ClassA

  • Anode current

    5 mA

    ClassA

  • Screen-grid current

    1 mA

    ClassA

  • Output power

    290 mW

    ClassA

  • Load resistance

    20 kOhm

    ClassA

Capacitance

  • Input capacitance

    5 pF

  • Output capacitance

    3.8 pF

  • Anode-grid capacitance

    <0.40 pF