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

Voltage Pentode - Sharp Cutoff (single) ·Pentode

6AS6

Dual-control sharp-cutoff pentode for converter, modulator, gating, and amplifier applications. Its broad industrial and communications use is not specifically centered on radio detection or superheterodyne frequency conversion.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
E7-1
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 175 mA

Description

6AS6 is described in the supplied Tung-Sol datasheet as a dual-control sharp-cutoff pentode. Published maximum ratings and core section characteristics were extracted into the technical tables.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
E7-1
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
175 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

E7-1 - 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
0.0032 S
Max plate voltage
180 V
Max screen voltage
140 V
Max plate dissipation
1.7 W
Max screen dissipation
0.75 W
Max cathode current
8 mA
Rectifier max heater-cathode voltage
90 V

Promoted from published ratings/characteristics; identical repeated sections compressed where applicable.

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

1956 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    175 mA

  • Application

    GatedMixerSpecialPurposeAmplifier

Data set 02

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Source Anomaly

    Supplied 6AS6.pdf contains a curve page labeled 6AT6

    No 6AS6 electrical table present in supplied PDF

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    120 V

    ClassA Ec3=0V

  • Screen voltage

    120 V

    ClassA Ec3=0V

  • Control-grid voltage

    -2 V

    ClassA Ec3=0V

  • Plate current

    5.2 mA

    ClassA Ec3=0V

  • Screen current

    3.5 mA

    ClassA Ec3=0V

Data set 04

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Control-grid voltage

    -2 V

    MixerGatedAmplifier

  • Plate voltage

    120 V

    MixerGatedAmplifier

  • Screen voltage

    120 V

    MixerGatedAmplifier

  • Suppressor-grid voltage

    0 V

    MixerGatedAmplifier

  • Plate current

    5.2 mA

    MixerGatedAmplifier

  • Screen current

    3.5 mA

    MixerGatedAmplifier

Characteristic

  • Transconductance

    3200 µS

    Section1

Data set 05

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater Voltage

    6.3 V

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    175 mA

Characteristic

  • Grid 1 transconductance

    3200 uS

  • Grid 3 transconductance

    470 uS

Data set 07

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater voltage

    6.3 V

    Published table

  • Heater current

    175 mA

    Published table

  • Plate resistance

    110000 ohm

    Published table

  • Control-grid transconductance

    3200 µS

    Published table

  • Suppressor-grid transconductance

    470 µS

    Published table

Other

  • Plate voltage

    120 V

    PentodeConnection

  • Screen voltage

    120 V

    PentodeConnection

  • Control-grid voltage

    -2 V

    PentodeConnection

  • Suppressor-grid voltage

    0 V

    PentodeConnection

  • Screen current

    3.5 mA

    PentodeConnection

Data set 08

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Typical Plate Voltage

    120 V

    Vg3=0V

  • Typical Screen Voltage

    120 V

    Vg3=0V

  • Plate Current

    5.1 mA

    Vg3=0V

  • Screen Current

    3.5 mA

    Vg3=0V

  • Control-Grid Voltage

    -2 V

    Vg3=0V

  • Suppressor-Grid Transconductance

    450 uS

    Vg3=0V

  • Plate Resistance

    150000 ohm

  • Transconductance

    3200 uS

Other

  • Frequency-Changer Oscillator Voltage

    6 V

    FrequencyChanger

  • Maximum Plate Voltage

    300 V

  • Maximum Screen Voltage

    140 V

  • Maximum Plate Dissipation

    1.7 W

  • Maximum Screen Dissipation

    0.75 W

  • Maximum Cathode Current

    18 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

Data set 09

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Suppressor Transconductance

    470 uS

    ClassA;SuppressorVoltage=0V

Data set 10

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    175 mA

  • Peak heater-cathode voltage

    90 V

    BothPolarities

  • Plate voltage

    150 V

    ClassA

  • Screen voltage

    100 V

    ClassA

  • Grid No.1 voltage

    -1 V

    ClassA

  • Grid No.3 voltage

    0 V

    ClassA

  • Plate current

    8 mA

    ClassA

Characteristic

  • Transconductance grid No.1

    4500 uS

    ClassA

Capacitance

  • Grid No.1-to-plate capacitance

    0.02 pF

    WithShield

  • Grid No.1-to-grid No.3 capacitance

    0.15 pF

Data set 11

2026 Western Electric 400s

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate dissipation

    1.7 watts

    Plate dissipation 1.7 watts

  • Sereen dissipation

    75 watt

    Sereen dissipation 0,75 watt

Characteristic

  • Cathode current

    18 milliamperes

    Cathode current 18 milliamperes

  • Heater-cathode voltage

    90 volts

    Heater-cathode voltage 90 volts

  • Plate voltage

    120 volts

    Plate voltage 120 120 volts

  • Sereen voltage

    120 volts

    Sereen voltage 120 120 volts

  • Suppresser voltage

    -3 volts

    Suppresser voltage -3 0 volts

  • Grid voltage

    -2 volts

    Grid voltage -2 = 2 volts

  • Sereen current

    4.8 milliamperes

    . Sereen current 4.8 3.5 milliamperes

  • Plate voltage

    120 volts

    Plate voltage 120 volts Plate voltage 120 120 volts

  • Screen voltage

    120 volts

    . Screen voltage 120 volts Sereen voltage 120 60 volts

  • Suppressor voltage

    0 volts

    Suppressor voltage 0 volts Grid voltage - 2 0 volts

  • SCREEN VOLTAGE=

    120 VOLTS

    SCREEN VOLTAGE=120 VOLTS fe——— 14

  • Ef=

    63 VOLTS

    Ef=63 VOLTS PLATE VOLTAGE=120 VOLTS £t =6.3 VOLTS Eci=n

  • H Eci=-i o SCREEN VOLTAGE

    120 VOLTS

    H Eci=-i o SCREEN VOLTAGE 120 VOLTS

  • " Ef=

    63 VOLTS

    " Ef=63 VOLTS Eciz - \ SCREEN VOLTAGE«I20VOLTS

  • W

    5000 VOLTS

    W 5000 PLATE VOLTAGE =120 VOLTS |

  • GRID VOLTAGE. £¢ =~/ E

    63 VOLTS

    GRID VOLTAGE. £¢ =~/ E4=63 VOLTS

  • Published value

    1400 VOLTS

    1400 AN PLATE VOLTAGE =120 VOLTS

  • / \ SCREEN VOLTAGE =i

    20 VOLTS

    / \ SCREEN VOLTAGE =i 20 VOLTS

Data set 12

2026 Western Electric Other

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater Voltage

    6.3 V

    A-C or D-C

  • Heater Current Nominal

    175 mA

    Nominal

  • Plate Voltage Maximum

    180 V

    Design-center value

  • Screen Voltage Maximum

    140 V

    Design-center value

  • Positive Suppressor Voltage Maximum

    27 V

    Design-center value

  • Plate Dissipation Maximum

    1.7 W

    Design-center value

  • Screen Dissipation Maximum

    0.75 W

    Design-center value

  • Cathode Current Maximum

    18 mA

    Design-center value

  • Heater-Cathode Voltage Maximum

    90 V

    Design-center value

  • Bulb Temperature Maximum

    120 degC

    Design-center value

  • Plate Voltage

    120 V

    Suppressor -3 V

  • Screen Voltage

    120 V

    Suppressor -3 V

  • Suppressor Voltage

    -3 V

    Operating column 1

  • Control Grid Voltage

    -2 V

    Operating column 1

  • Plate Voltage

    120 V

    Suppressor 0 V

  • Screen Voltage

    120 V

    Suppressor 0 V

  • Suppressor Voltage

    0 V

    Operating column 2

  • Control Grid Voltage

    -2 V

    Operating column 2

Characteristic

  • Plate Current

    3.6 mA

    Operating column 1

  • Screen Current

    4.8 mA

    Operating column 1

  • Control-Grid Transconductance

    1850 uS

    Operating column 1

  • Suppressor-Grid Transconductance

    810 uS

    Operating column 1