Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage - Triode (single) ·Triode

4019B

Directly heated oxide-filament triode with published audio operating conditions, load resistance, output, and harmonic-performance data for low-frequency amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4
Base pins
4
Nominal heater
4 V / 250 mA

Description

Standard Valves 4019B is an oxide-coated directly heated triode. The sheet publishes its filament rating, static constants, interelectrode capacitances, and a table of typical anode/grid/load operating conditions with output and harmonic performance. Oxide-coated filament triode, Standard British 4-pin base.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4
Base pins
4
Nominal heater voltage
4 V
Nominal heater current
250 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
5500 Ω
Transconductance
0.00127 S
Amplification factor
7
Max plate voltage
190 V

Published ratings/characteristics promoted; remaining useful source values represented as parameters.

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

1937 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-Anode Capacitance

    5.4 pF

    Published specification

  • Anode-Filament Capacitance

    4.8 pF

    Published specification

  • Grid-Filament Capacitance

    7.3 pF

    Published specification

Characteristics

  • Characteristic Anode Voltage

    130 V

    For impedance/amplification factor/transconductance values

  • Characteristic Grid Bias

    -8 V

    For impedance/amplification factor/transconductance values

Other

  • Output Power

    54 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-6V; AnodeCurrent=9.7mA; AnodeResistance=4800ohm; LoadResistance=4600ohm

  • Total Harmonics Below Fundamental

    30 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-6V; AnodeCurrent=9.7mA; AnodeResistance=4800ohm; LoadResistance=4600ohm

  • Output Power

    49 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-6V; AnodeCurrent=9.7mA; AnodeResistance=4800ohm; LoadResistance=9200ohm

  • Total Harmonics Below Fundamental

    34 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-6V; AnodeCurrent=9.7mA; AnodeResistance=4800ohm; LoadResistance=9200ohm

  • Output Power

    36 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-6V; AnodeCurrent=9.7mA; AnodeResistance=4800ohm; LoadResistance=13800ohm

  • Total Harmonics Below Fundamental

    37 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-6V; AnodeCurrent=9.7mA; AnodeResistance=4800ohm; LoadResistance=13800ohm

  • Output Power

    83 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-8V; AnodeCurrent=6.8mA; AnodeResistance=5500ohm; LoadResistance=5500ohm

  • Total Harmonics Below Fundamental

    24 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-8V; AnodeCurrent=6.8mA; AnodeResistance=5500ohm; LoadResistance=5500ohm

  • Output Power

    74 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-8V; AnodeCurrent=6.8mA; AnodeResistance=5500ohm; LoadResistance=11000ohm

  • Total Harmonics Below Fundamental

    30 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-8V; AnodeCurrent=6.8mA; AnodeResistance=5500ohm; LoadResistance=11000ohm

  • Output Power

    61 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-8V; AnodeCurrent=6.8mA; AnodeResistance=5500ohm; LoadResistance=16500ohm

  • Total Harmonics Below Fundamental

    32 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-8V; AnodeCurrent=6.8mA; AnodeResistance=5500ohm; LoadResistance=16500ohm

  • Output Power

    100 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-10V; AnodeCurrent=4.3mA; AnodeResistance=6500ohm; LoadResistance=5500ohm

  • Total Harmonics Below Fundamental

    16 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-10V; AnodeCurrent=4.3mA; AnodeResistance=6500ohm; LoadResistance=5500ohm

  • Output Power

    85 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-10V; AnodeCurrent=4.3mA; AnodeResistance=6500ohm; LoadResistance=11000ohm

  • Total Harmonics Below Fundamental

    23 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-10V; AnodeCurrent=4.3mA; AnodeResistance=6500ohm; LoadResistance=11000ohm

  • Output Power

    80 mW

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-10V; AnodeCurrent=4.3mA; AnodeResistance=6500ohm; LoadResistance=16500ohm

  • Total Harmonics Below Fundamental

    27 dB

    TypicalOperatingConditions; PlateVoltage=130V; GridBias=-10V; AnodeCurrent=4.3mA; AnodeResistance=6500ohm; LoadResistance=16500ohm

  • Output Power

    150 mW

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-10V; AnodeCurrent=9.8mA; AnodeResistance=4700ohm; LoadResistance=4600ohm

  • Total Harmonics Below Fundamental

    24 dB

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-10V; AnodeCurrent=9.8mA; AnodeResistance=4700ohm; LoadResistance=4600ohm

  • Output Power

    132 mW

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-10V; AnodeCurrent=9.8mA; AnodeResistance=4700ohm; LoadResistance=9200ohm

  • Total Harmonics Below Fundamental

    30 dB

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-10V; AnodeCurrent=9.8mA; AnodeResistance=4700ohm; LoadResistance=9200ohm

  • Output Power

    112 mW

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-10V; AnodeCurrent=9.8mA; AnodeResistance=4700ohm; LoadResistance=13800ohm

  • Total Harmonics Below Fundamental

    37 dB

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-10V; AnodeCurrent=9.8mA; AnodeResistance=4700ohm; LoadResistance=13800ohm

  • Output Power

    180 mW

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-12V; AnodeCurrent=7.1mA; AnodeResistance=5300ohm; LoadResistance=5500ohm

  • Total Harmonics Below Fundamental

    19 dB

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-12V; AnodeCurrent=7.1mA; AnodeResistance=5300ohm; LoadResistance=5500ohm

  • Output Power

    156 mW

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-12V; AnodeCurrent=7.1mA; AnodeResistance=5300ohm; LoadResistance=11000ohm

  • Total Harmonics Below Fundamental

    23 dB

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-12V; AnodeCurrent=7.1mA; AnodeResistance=5300ohm; LoadResistance=11000ohm

  • Output Power

    130 mW

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-12V; AnodeCurrent=7.1mA; AnodeResistance=5300ohm; LoadResistance=16500ohm

  • Total Harmonics Below Fundamental

    31 dB

    TypicalOperatingConditions; PlateVoltage=160V; GridBias=-12V; AnodeCurrent=7.1mA; AnodeResistance=5300ohm; LoadResistance=16500ohm

  • Output Power

    290 mW

    TypicalOperatingConditions; PlateVoltage=190V; GridBias=-14V; AnodeCurrent=9.7mA; AnodeResistance=4900ohm; LoadResistance=5500ohm

  • Total Harmonics Below Fundamental

    23 dB

    TypicalOperatingConditions; PlateVoltage=190V; GridBias=-14V; AnodeCurrent=9.7mA; AnodeResistance=4900ohm; LoadResistance=5500ohm

  • Output Power

    240 mW

    TypicalOperatingConditions; PlateVoltage=190V; GridBias=-14V; AnodeCurrent=9.7mA; AnodeResistance=4900ohm; LoadResistance=11000ohm

  • Total Harmonics Below Fundamental

    30 dB

    TypicalOperatingConditions; PlateVoltage=190V; GridBias=-14V; AnodeCurrent=9.7mA; AnodeResistance=4900ohm; LoadResistance=11000ohm

  • Output Power

    180 mW

    TypicalOperatingConditions; PlateVoltage=190V; GridBias=-14V; AnodeCurrent=9.7mA; AnodeResistance=4900ohm; LoadResistance=16500ohm

  • Total Harmonics Below Fundamental

    33 dB

    TypicalOperatingConditions; PlateVoltage=190V; GridBias=-14V; AnodeCurrent=9.7mA; AnodeResistance=4900ohm; LoadResistance=16500ohm

Data set 02

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater/filament voltage

    4 V

  • Heater/filament current

    250 mA

  • Plate resistance

    5500 ohm

  • Amplification factor

    7

Other

  • Maximum direct anode voltage

    190 V