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Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Diode-Triode

EABC80

Triple-diode high-mu triode widely used in AM/FM receivers for detection, FM discrimination, AVC, and audio voltage amplification. Three diode sections handle multiple rectification duties while the triode supplies the first audio-stage gain.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
4
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 450 mA

Description

Triple-diode triode for detection and low-frequency voltage amplification; source also designates 6AK8.

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
6.3 V
Nominal heater current
450 mA
Parallel heater voltage
6.3 V
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

4 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
48000 Ω
Transconductance
0.00145 S
Amplification factor
70
Max plate voltage
300 V
Max plate dissipation
1 W
Max cathode current
5 mA
Rectifier peak inverse voltage
350 V

Triode section. Diode ratings and capacitances are retained in parameters because only one representative technical section row is emitted in this compact extraction.

Section 2

Diode

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max cathode current
1 mA
Rectifier peak inverse voltage
350 V
Rectifier nominal output current
1 mA
Rectifier peak forward current
6 mA
Rectifier max heater-cathode voltage
150 V

Source-published values promoted where directly stated; additional values retained in parameter table.

Section 3

Diode

X-ray radiationInterelectrode capacitances
Max cathode current
10 mA
Rectifier peak inverse voltage
350 V
Rectifier nominal output current
10 mA
Rectifier peak forward current
75 mA
Rectifier max heater-cathode voltage
150 V

Source-published values promoted where directly stated; additional values retained in parameter table.

Section 4

Diode

X-ray radiationInterelectrode capacitances
Max cathode current
10 mA
Rectifier peak inverse voltage
350 V
Rectifier nominal output current
10 mA
Rectifier peak forward current
75 mA
Rectifier max heater-cathode voltage
150 V

Source-published values promoted where directly stated; additional values retained in parameter table.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Plate Dissipation

    1 W

SECTION 2

Diode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    450 mA

    Published nominal value

  • Transconductance

    1500 µS

    Published operating characteristic

Data set 02

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Triode maximum plate voltage

    300 V

    TriodeSection

  • Diode peak inverse voltage

    350 V

    DiodeSections

  • Diode current maximum

    10 mA

    DiodeSection

Characteristic

  • Triode amplification factor

    70

    TriodeSection

  • Triode transconductance

    1450 uS

    TriodeSection

  • Triode plate resistance

    48000 ohm

    TriodeSection

Construction

  • Physical diode count

    3

  • Physical triode count

    1

Data set 03

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    First AF amplifier

SECTION 2

Diode

Application

  • Application

    AM demodulator / AGC

SECTION 3

Diode

Application

  • Application

    FM discriminator

Data set 04

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    AF amplifier

SECTION 2

Diode

Application

  • Application

    AM/FM demodulation diode

SECTION 3

Diode

Application

  • Application

    AM/FM demodulation diode

SECTION 4

Diode

Application

  • Application

    AM/FM demodulation diode

Data set 05

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    100 V

    AudioAmplifier

  • Control-grid voltage

    -1 V

    AudioAmplifier

  • Plate current

    0.8 mA

    AudioAmplifier

  • Plate voltage

    250 V

    AudioAmplifier

  • Control-grid voltage

    -3 V

    AudioAmplifier

  • Plate current

    1 mA

    AudioAmplifier

Characteristic

  • Transconductance

    1450 µS

    100VPlate

  • Amplification factor

    70

    Section1

  • Plate resistance

    48000 Ω

    100VPlate

  • Transconductance

    1400 µS

    250VPlate

  • Plate resistance

    50000 Ω

    250VPlate

Capacitance

  • Grid capacitance

    1.9 pF

    Section1

  • Plate capacitance

    1.4 pF

    Section1

  • Grid-to-plate capacitance

    2 pF

    Section1

SECTION 2

Diode

Capacitance

  • Diode capacitance

    0.8 pF

    Diode1

Characteristic

  • Internal resistance at +10 V

    5000 Ω

    Diode1

SECTION 3

Diode

Capacitance

  • Diode capacitance

    4.8 pF

    Diode2

Characteristic

  • Internal resistance at +5 V

    200 Ω

    Diode2

SECTION 4

Diode

Capacitance

  • Diode capacitance

    4.8 pF

    Diode3

Characteristic

  • Internal resistance at +5 V

    200 Ω

    Diode3

Data set 06

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Plate Voltage

    250 V

    TriodeSection

  • Grid Voltage

    -3 V

    TriodeSection

  • Plate Current

    1 mA

    TriodeSection

  • Transconductance

    1400 uS

    TriodeSection

  • Amplification Factor

    70

    TriodeSection

  • Plate Resistance

    50000 ohm

    TriodeSection

  • Plate Resistance

    50000 ohm

  • Transconductance

    1400 uS

  • Amplification Factor

    70

Capacitance

  • Input Capacitance

    1.9 pF

    TriodeSection

  • Output Capacitance

    1.4 pF

    TriodeSection

  • Grid Plate Capacitance

    2 pF

    TriodeSection

Other

  • Maximum Plate Voltage

    300 V

  • Maximum Plate Dissipation

    1 W

  • Maximum Cathode Current

    5 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

SECTION 2

Diode

Characteristic

  • Dynamic Resistance

    5000 ohm

Other

  • Maximum Anode Current

    1 mA

  • Maximum Peak Anode Current

    6 mA

  • Peak Inverse Voltage

    350 V

  • Nominal Output Current

    1 mA

  • Peak Forward Current

    6 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

SECTION 3

Diode

Characteristic

  • Dynamic Resistance

    200 ohm

Other

  • Maximum Anode Current

    10 mA

  • Maximum Peak Anode Current

    75 mA

  • Peak Inverse Voltage

    350 V

  • Nominal Output Current

    10 mA

  • Peak Forward Current

    75 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

SECTION 4

Diode

Characteristic

  • Dynamic Resistance

    200 ohm

Other

  • Maximum Anode Current

    10 mA

  • Maximum Peak Anode Current

    75 mA

  • Peak Inverse Voltage

    350 V

  • Nominal Output Current

    10 mA

  • Peak Forward Current

    75 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

Data set 07

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    AFVoltageAmplifier text

SECTION 2

Diode

Application

  • Application

    DetectorRectifier text

Data set 08

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Anode current I

    0.8 mA

  • Transconductance S

    1.45 mA/V

  • Heater voltage Vs

    6.3 V

  • Heater current I

    480 mA

Capacitance

  • Grid to all except anode Cg(a)

    1.9 pF

  • Anode to all except grid Ca(g)

    1.4 pF

  • Anode to grid Cag

    2 pF

  • Grid to heater cgf max

    - to 0.04 pF

    Maximum

Characteristic

  • Grid resistor Rg =

    10 MQ

  • Supply voltage Vp 250 250 250 200 200

    200 V

  • Anode resistor Ry 220 100 47 220 100

    47 k2

  • Grid resistor next stage Rg 0.68 0.33 0.15 0.68 0.33

    0.15 MQ

  • Anode current Iy 0.76 1.40 2.20 0.56 1.00

    1.6 mA

  • at output voltage Vo=

    3 VRMS

  • at output voltage V5=

    3 VRMS

  • at output voltage V,=

    8 VRMS

  • Supply voltage vy, 170 170 170 100 100

    100 V

  • Anode resistor R, 220 100 47 220 100

    47 k2

  • Grid resistor next stage Rg' 0.68 0.33 0.15 0.68 0.33

    0.15 MQ

  • Anode current I, 0.46 0.82 1.25 0.21 0.35

    0.52 mA

  • at output voltage V4=

    3 VRmS

  • at output voltage V5=

    5 VRMS

SECTION 2

Diode

Capacitance

  • Diode No.!1 to all Cdl

    0.8 pF

  • Diode No.2 to all Cd2

    4.8 pF

  • Diode No.3 to all Cd3

    4.8 pF

  • Cathode (D9) to all CkDz

    4.9 pF

  • 1 to heater Cdlf max

    - to 0.25 pF

    Maximum

  • Diode No.3 to heater Cd3f max

    - to 0.2 pF

    Maximum

  • Cathode (D7) to heater CkDzf

    2.5 pF

  • Anode to diode No.1 Cadl max

    - to 0.12 pF

    Maximum

  • Anode to diode No.3 Cad3 max

    - to 0.1 pF

    Maximum

  • Anode to cathode (D») CakD2 max

    - to 0.01 pF

    Maximum

  • Grid to diode No.l ngl max

    - to 0.07 pF

    Maximum

  • Grid to diode No.3 ngS max

    - to 0.02 pF

    Maximum

  • Grid to cathode (Dg) Cng2 max

    - to 0.005 pF

    Maximum

  • Diode No.1 to all Cdl

    0.9 pF

  • Diode No.2 to all Cd2

    0.9 pF

  • Diode No.1 to diode No.2 Cd1d2 max

    - to 0.2 pF

    Maximum

  • Diode No.1 to heater Cdlf max

    - to 0.25 pF

    Maximum

  • Diode No.2 to heater Cdzf max

    - to 0.05 pF

    Maximum

Characteristic

  • Anode voltage vV, 1006

    250 V

  • Anode current 1, 0.8

    1 mA

  • Transconductance S 1.45

    1.4 mA/V

  • Internal resistance R 48

    50 k§

Other

  • Diode No.l voltage, peak negative —Vdlp max

    - to 350 V

    Maximum

  • Diode No.2 voltage, peak negative —dep max

    - to 350 V

    Maximum

  • Diode No.3 voltage, peak negative ‘Vd3p max

    - to 350 V

    Maximum

  • D.C. component Id1 max

    - to 1 mA

    Maximum

  • peak Idlp max

    - to 6 mA

    Maximum

  • D.C. component Id2 max

    - to 10 mA

    Maximum

  • peak Id2p max

    - to 75 mA

    Maximum

  • D.C. component Id3 max

    - to 10 mA

    Maximum

  • peak Id3p max

    - to 75 mA

    Maximum

  • Cathode (D2) to heater voltage VkDz /f max

    - to 150 V

    Maximum

  • Heater voltage V¢

    6.3 V

  • Heater current I¢

    300 mA

Data set 09

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Plate Dissipation

    1 W

  • Maximum Cathode Current

    5 mA

Characteristic

  • Transconductance

    1450 µS

    Typical

  • Amplification Factor

    70

    Typical

  • Plate Resistance

    48000 ohm

    Typical

SECTION 2

Diode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Cathode Current

    1 mA

  • Maximum Peak Inverse Voltage

    350 V

  • Rectified Output Current

    1 mA

SECTION 3

Diode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Cathode Current

    10 mA

  • Maximum Peak Inverse Voltage

    350 V

  • Rectified Output Current

    10 mA

SECTION 4

Diode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Cathode Current

    10 mA

  • Maximum Peak Inverse Voltage

    350 V

  • Rectified Output Current

    10 mA

Data set 10

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater current

    450 mA

    Translated from Russian source; Ток накала . й 450 мА

  • Plate current

    1 mA

    Translated from Russian source; Ток анода триода . 1 мА

  • Transconductance

    1.2 mA/V

    Translated from Russian source; Крутизна характеристики триода . . . , 1,2 мА/В

  • Amplification factor

    70

    Translated from Russian source; Коэффициент усиления . . . . . . . .. 70

  • Plate resistance

    58 ohm

    Translated from Russian source; Внутреннее сопротивление . РЕ 58 кОм

  • Plate current

    2 mA

    Translated from Russian source; Ток анода 1-го диода (при й.. д1—10 В) ‚ 2 мА

  • Plate resistance

    5 ohm

    Translated from Russian source; Внутреннее сопротивление 1-го диода ‚ , . 5 кОм

  • Plate current

    25 mA

    Translated from Russian source; Ток анода 2-го диода (при Иа.да=5 В) . . . . .. 25 мА

  • Plate current

    25 mA

    Translated from Russian source; Ток анода 3-го диода (при Оа.дз=5 В). . . . .. 25 мА

  • Input capacitance

    1.9 pF

    Translated from Russian source; входная триода. . й ‚ й й 1,9 пФ

  • Output capacitance

    1.4 pF

    Translated from Russian source; выходная триода . , . ‚ . 1,4 пФ

  • Transfer capacitance

    2.3 pF

    Translated from Russian source; проходная триода . , й 2,3 пФ

  • Heater current

    300 mA

    Translated from Russian source; Ток накала . . . , . . . .. я 300 мА

  • Plate current

    9 mA

    Translated from Russian source; Ток анода пентода . . , . . . , ° . 9 мА

  • Screen current

    2.7 mA

    Translated from Russian source; Ток 2-й сетки . . . ,. * 2,7 мА

  • Transconductance

    3.8 mA/V

    Translated from Russian source; Крутизна ›„арактеристики . 3,8 мА/В

  • Amplification factor

    1

    Translated from Russian source; Коэффициент усиления по 1-й сетке относи тельн О

  • Plate resistance

    1 ohm

    Translated from Russian source; Внутреннее сопротивление . . . 1 МоОм

  • Plate current

    0.5 mA

    Translated from Russian source; Ток анода каждого диода (при Па д=20 В) ° И >0,5 мА

  • Input capacitance

    5 pF

    Translated from Russian source; входная пентода . „‚ . . . 5 пФ

Other

  • Heater voltage

    6.9 V

    Translated from Russian source; Напряжение накала . й 5,7—6,9

  • Plate voltage

    300 V

    Translated from Russian source; Напряжение анода триода . 300 В

  • Peak inverse voltage

    350 V

    Translated from Russian source; Обратное напряжение каждого диода 1 импульсе 350 В

Data set 11

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 2

Diode

Characteristic

  • Anode current I,

    0.8 mA

    Published datasheet value

  • Transconductance S

    1.45 mA/V

    Published datasheet value

  • Heater voltage Vs

    6.3 V

    Published datasheet value

  • Heater current I

    480 mA

    Published datasheet value

  • Grid to all except anode Cg(a)

    1.9 pF

    Published datasheet value

  • Anode to all except grid Ca(g)

    1.4 pF

    Published datasheet value

  • Anode to grid Cag

    2 pF

    Published datasheet value

  • Grid to heater cgf max

    0.04 pF

    Published datasheet value

  • Diode No.!

    0.8 pF

    Published datasheet value

  • Diode No

    4.8 pF

    Published datasheet value

  • Cathode (D9) to all CkDz

    4.9 pF

    Published datasheet value

  • Diode No

    0.2 pF

    Published datasheet value

  • Cathode (D7) to heater CkDzf

    2.5 pF

    Published datasheet value

  • Anode to diode No

    0.12 pF

    Published datasheet value

  • Anode to diode No

    0.1 pF

    Published datasheet value

  • Anode to cathode (D») CakD2 max

    0.01 pF

    Published datasheet value

  • Grid to diode No.l ngl max

    0.07 pF

    Published datasheet value

  • Grid to diode No

    0.02 pF

    Published datasheet value

  • Grid to cathode (Dg) Cng2 max

    0.005 pF

    Published datasheet value

  • Anode voltage vV,

    250 V

    Published datasheet value

  • Anode current

    1 mA

    Published datasheet value

  • Transconductance S

    1.4 mA/V

    Published datasheet value

  • Grid resistor Rg =

    10 MQ

    Published datasheet value

  • Supply voltage Vp

    200 V

    Published datasheet value

  • Grid resistor next stage Rg

    0.15 MQ

    Published datasheet value

  • Anode current Iy

    1.6 mA

    Published datasheet value

  • Supply voltage vy,

    100 V

    Published datasheet value

  • Grid resistor next stage Rg'

    0.15 MQ

    Published datasheet value

  • Anode current I,

    0.52 mA

    Published datasheet value

  • Diode voltage Vd1 =

    10 V

    Published datasheet value

  • Diode voltage de =

    5 V

    Published datasheet value

  • Diode voltage Vd3 =

    35 V

    Published datasheet value

  • input voltage is min

    50 mW

    Published datasheet value

  • Anode voltage Vag max

    550 V

    Published datasheet value

  • Va max

    300 V

    Published datasheet value

  • Anode dissipation W, max

    1 W

    Published datasheet value

  • Grid resistor R max

    3 MQ

    Published datasheet value

  • Grid resistor Rg max

    22 MQ

    Published datasheet value

  • Cathode to heater voltage Vit max

    150 V

    Published datasheet value

  • Diode No.l voltage, peak negative —Vdlp max

    350 V

    Published datasheet value

  • Diode No

    350 V

    Published datasheet value

  • D.C. component Id1 max

    1 mA

    Published datasheet value

  • peak Idlp max

    6 mA

    Published datasheet value

  • D.C. component Id2 max

    10 mA

    Published datasheet value

  • peak Id2p max

    75 mA

    Published datasheet value

  • D.C. component Id3 max

    10 mA

    Published datasheet value