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Voltage Pentode - Sharp Cutoff (single) ·Pentode-Triode

6AW8A

High-mu triode plus sharp-cutoff pentode for television IF, video, AGC/reactance, oscillator, sync, and phase-splitter circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9DX
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

High-mu triode plus sharp-cutoff pentode for television IF, video, AGC/reactance, oscillator, sync, and phase-splitter circuits.

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
9DX
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9DX - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN12KBK — Cathode

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN22G1BG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN32PBP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN4H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN5H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN61G3AG3 — Suppressor GridGroup 9DX6

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN6ISAIS — Internal ScreenGroup 9DX6

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN61KAK — CathodeGroup 9DX6

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN71G1AG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN81G2AG2 — Screen Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

PIN91PAP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DX

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
400000 Ω
Transconductance
0.009 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
3.75 W
Max screen dissipation
1.1 W
Rectifier max heater-cathode voltage
200 V

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

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
17500 Ω
Transconductance
0.004 S
Amplification factor
70
Max plate voltage
330 V
Max plate dissipation
1.1 W
Rectifier max heater-cathode voltage
200 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Plate current

    4 mA

    Typical operating conditions

SECTION 2

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Plate current

    4 mA

    Typical operating conditions

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

Other

  • Maximum plate voltage

    330 V

  • Maximum screen supply voltage

    330 V

  • Maximum plate dissipation

    3.75 W

  • Maximum screen dissipation

    1.1 W

Capacitance

  • Grid-to-plate capacitance

    0.04 pF

  • Input capacitance

    10 pF

  • Output capacitance

    4.5 pF

SECTION 2

Triode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Amplification factor

    70

  • Transconductance

    4000 uS

Other

  • Maximum plate voltage

    330 V

  • Maximum plate dissipation

    1.1 W

  • Typical plate voltage

    200 V

  • Typical grid voltage

    -2 V

  • Plate current

    4 mA

Capacitance

  • Grid-to-plate capacitance

    2.2 pF

  • Input capacitance

    3.4 pF

  • Output capacitance

    3 pF

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

  • Heater voltage

    6.3 V

    Published table

  • Heater current

    600 mA

    Published table

  • Triode transconductance

    4000 µS

    TriodeSection

  • Triode amplification factor

    70

    TriodeSection

  • Pentode plate resistance

    200000 ohm

    PentodeSection

  • Pentode transconductance

    9500 µS

    PentodeSection

Other

  • Triode plate voltage

    200 V

    TriodeSection SyncSeparator

  • Triode grid voltage

    -2 V

    TriodeSection

  • Triode plate current

    4 mA

    TriodeSection

  • Pentode plate voltage

    150 V

    PentodeSection VideoAmplifier

  • Pentode screen voltage

    150 V

    PentodeSection VideoAmplifier

  • Pentode plate current

    15 mA

    PentodeSection VideoAmplifier

  • Pentode screen current

    3.5 mA

    PentodeSection VideoAmplifier

Data set 04

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage nominal

    6.3 V

  • Heater current

    600 mA

  • Maximum plate voltage

    330 V

    ClassA1

  • Maximum plate dissipation

    3.75 W

    ClassA1

  • Maximum screen supply voltage

    330 V

    ClassA1

  • Maximum screen input at <=165 V

    1.1 W

    ClassA1

Characteristics

  • Heater warm-up time

    11 s

    Average

  • Plate supply voltage

    150 V

    ClassA1

  • Screen supply voltage

    150 V

    ClassA1

  • Cathode resistor

    150 ohm

    ClassA1

  • Plate resistance

    200000 ohm

    ClassA1

  • Transconductance

    9500 µS

    ClassA1

  • Plate current

    15 mA

    ClassA1

  • Screen current

    3.5 mA

    ClassA1

SECTION 2

Triode

Other

  • Heater voltage nominal

    6.3 V

  • Heater current

    600 mA

  • Maximum plate voltage

    330 V

    ClassA1

  • Maximum plate dissipation

    1.1 W

    ClassA1

Characteristics

  • Heater warm-up time

    11 s

    Average

  • Plate supply voltage

    200 V

    ClassA1

  • Grid voltage

    -2 V

    ClassA1

  • Amplification factor

    70

    ClassA1

  • Plate resistance

    17500 ohm

    ClassA1

  • Transconductance

    4000 µS

    ClassA1

  • Plate current

    4 mA

    ClassA1

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater Voltage (ac/dc) 6.3

    8.4 V

    Published in approved 8AW8A target datasheet entry; Section2

  • Heater Current 0.6

    450 mA

    Published in approved 8AW8A target datasheet entry; Section2

  • Heater Warm-up Time (Average) 11

    11 seconds

    Published in approved 8AW8A target datasheet entry; Section2

  • Plate Voltage 330

    330 V

    Published in approved 8AW8A target datasheet entry; Section2

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    Published in approved 8AW8A target datasheet entry; Section2

  • 0

    0 V

    Published in approved 8AW8A target datasheet entry; Section2

  • Plate Dissipation 1.1

    3.75 W

    Published in approved 8AW8A target datasheet entry; Section2

  • For grid-No.2 voltages up to

    165 V

    Published in approved 8AW8A target datasheet entry; Section2

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved 8AW8A target datasheet entry; Section2

  • Plate Resistance (Approx.) — •

    0.2 MΩ

    Published in approved 8AW8A target datasheet entry; Section2

  • Plate Current 4

    15 mA

    Published in approved 8AW8A target datasheet entry; Section2

  • Grid-No. 2 Current

    3.5 mA

    Published in approved 8AW8A target datasheet entry; Section2

  • 20 fiA —5

    -8 V

    Published in approved 8AW8A target datasheet entry; Section2

  • For fixed-bias operation 0.5

    0.25 MΩ

    Published in approved 8AW8A target datasheet entry; Section2

  • For cathode-bias operation 1

    1 MΩ

    Published in approved 8AW8A target datasheet entry; Section2

Capacitance

  • Grid to Plate 2.2

    2.2 pF

    Published in approved 8AW8A target datasheet entry; Section2

  • Grid No.3, Internal Shield, and Heater 3.2

    3.4 pF

    Published in approved 8AW8A target datasheet entry; Section2

  • Grid No.3, Internal Shield, and Heater 1.8

    3 pF

    Published in approved 8AW8A target datasheet entry; Section2

  • Grid No.3, and Internal Shield 10

    10 pF

    Published in approved 8AW8A target datasheet entry; Section2

  • No.3, and Internal Shield 3.6

    4.5 pF

    Published in approved 8AW8A target datasheet entry; Section2

Characteristic

  • Plate Supply Voltage 200

    150 V

    Published in approved 8AW8A target datasheet entry; Section2

  • Cathode-Bias Resistor

    150 Ω

    Published in approved 8AW8A target datasheet entry; Section2

SECTION 2

Triode

Other

  • Heater Voltage (ac/dc) 6.3

    8.4 V

    Published in approved 8AW8A target datasheet entry; Section1

  • Heater Current 0.6

    450 mA

    Published in approved 8AW8A target datasheet entry; Section1

  • Heater Warm-up Time (Average) 11

    11 seconds

    Published in approved 8AW8A target datasheet entry; Section1

  • Plate Voltage 330

    330 V

    Published in approved 8AW8A target datasheet entry; Section1

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    Published in approved 8AW8A target datasheet entry; Section1

  • 0

    0 V

    Published in approved 8AW8A target datasheet entry; Section1

  • Plate Dissipation 1.1

    3.75 W

    Published in approved 8AW8A target datasheet entry; Section1

  • For grid-No.2 voltages up to

    165 V

    Published in approved 8AW8A target datasheet entry; Section1

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved 8AW8A target datasheet entry; Section1

  • Plate Resistance (Approx.) — •

    0.2 MΩ

    Published in approved 8AW8A target datasheet entry; Section1

  • Plate Current 4

    15 mA

    Published in approved 8AW8A target datasheet entry; Section1

  • Grid-No. 2 Current

    3.5 mA

    Published in approved 8AW8A target datasheet entry; Section1

  • 20 fiA —5

    -8 V

    Published in approved 8AW8A target datasheet entry; Section1

  • For fixed-bias operation 0.5

    0.25 MΩ

    Published in approved 8AW8A target datasheet entry; Section1

  • For cathode-bias operation 1

    1 MΩ

    Published in approved 8AW8A target datasheet entry; Section1

Capacitance

  • Grid to Plate 2.2

    2.2 pF

    Published in approved 8AW8A target datasheet entry; Section1

  • Grid No.3, Internal Shield, and Heater 3.2

    3.4 pF

    Published in approved 8AW8A target datasheet entry; Section1

  • Grid No.3, Internal Shield, and Heater 1.8

    3 pF

    Published in approved 8AW8A target datasheet entry; Section1

  • Grid No.3, and Internal Shield 10

    10 pF

    Published in approved 8AW8A target datasheet entry; Section1

  • No.3, and Internal Shield 3.6

    4.5 pF

    Published in approved 8AW8A target datasheet entry; Section1

Characteristic

  • Plate Supply Voltage 200

    150 V

    Published in approved 8AW8A target datasheet entry; Section1

  • Cathode-Bias Resistor

    150 Ω

    Published in approved 8AW8A target datasheet entry; Section1