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

6AZ8

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

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9ED
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 450 mA

Description

Miniature combined medium-mu triode and sharp-cutoff pentode used in television receivers for video/IF/AGC/reactance functions and low-frequency oscillator, sync-separator, clipper, 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
9ED
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9ED - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Base PinAP — Plate (Anode)

Original chart label: 1P; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN2Base PinAG2 — Screen Grid

Original chart label: 1G2; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN3Base PinAK — Cathode

Original chart label: 1K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN4Base Pin—H — Heater

Original chart label: H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN5Base PinAG3 — Suppressor GridGroup 9ED5

Original chart label: 1G3; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN5Base Pin—H — HeaterGroup 9ED5

Original chart label: H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN6Base PinAG1 — Control Grid

Original chart label: 1G1; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN7Base PinBK — Cathode

Original chart label: 2K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN8Base PinBP — Plate (Anode)

Original chart label: 2P; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

PIN9Base PinBG1 — Control Grid

Original chart label: 2G1; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9ED

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
6000 Ω
Transconductance
0.0065 S
Amplification factor
40
Max plate voltage
300 V
Max plate dissipation
2.6 W

Triode section; ratings and characteristics retained in parameter rows where not safely promotable.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
250000 Ω
Transconductance
0.009 S
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
2 W
Max screen dissipation
1 W

Pentode section; ratings and characteristics retained in parameter rows where not safely promotable.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

  • Heater Voltage............... ... ... ... .cciiiinn... 6.3 Volts

    6.3 V

    Heater Voltage............... ... ... ... .cciiiinn... 6.3 Volts

  • Heater Current. . .. ... ... ... .. ... .. ..ciiiiiini... 450 Ma

    450 mA

    Heater Current. . .. ... ... ... .. ... .. ..ciiiiiini... 450 Ma

  • Grid No. 2 Supply Voltage. . . ................ 300 Volts

    300 V

    Grid No. 2 Supply Voltage. . . ................ 300 Volts

  • Positive Grid No. 1 Voltage. . ................ 0 Volts

    0 V

    Positive Grid No. 1 Voltage. . ................ 0 Volts

  • Plate Dissipation. ... ........................ 2.6 2.0 Watts

    2 W

    Plate Dissipation. ... ........................ 2.6 2.0 Watts

  • For Grid No. 2 Voltages up to 150 Volts.. .. .. 0.5 Watt

    0.5 W

    For Grid No. 2 Voltages up to 150 Volts.. .. .. 0.5 Watt

  • For Grid No. 2 Voltages Between 150 and

    2 V

    For Grid No. 2 Voltages Between 150 and

  • Plate Supply Voltage. . ...................... 200 200 Volts

    200 V

    Plate Supply Voltage. . ...................... 200 200 Volts

  • Grid No. 2 Supply Voltage. . . . ............... 150 Volts

    150 V

    Grid No. 2 Supply Voltage. . . . ............... 150 Volts

  • Grid No. 1 Voltage. . .. ...................... -6 Volts

    -6 V

    Grid No. 1 Voltage. . .. ...................... -6 Volts

  • Plate Current. . .. ... ... ... ... ... ... ........ 13 9.5 Ma

    9.5 mA

    Plate Current. . .. ... ... ... ... ... ... ........ 13 9.5 Ma

  • Grid No.2 Current. .. ... ... ..., 3 Ma

    3 mA

    Grid No.2 Current. .. ... ... ..., 3 Ma

  • Transconductance. . . ............ ... .. .. ..... 3300 6000 umhos

    6000 umhos

    Transconductance. . . ............ ... .. .. ..... 3300 6000 umhos

  • Plate Resistance (approx.). ................... 5750 300,000 Ohms

    300 Ohms

    Plate Resistance (approx.). ................... 5750 300,000 Ohms

  • Grid No. 1 Voltage (approx.) for Plate Current

    1 V

    Grid No. 1 Voltage (approx.) for Plate Current

  • Grid No. 1 Voltage (approx.) for Transcon-

    1 V

    Grid No. 1 Voltage (approx.) for Transcon-

Other

  • Grid No. 2 Voltage. . .. ...................... See 6AMS8 Rating Chart

    2 V

    Grid No. 2 Voltage. . .. ...................... See 6AMS8 Rating Chart

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Plate current

    13 mA

    Typical operating conditions

SECTION 2

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Plate current

    13 mA

    Typical operating conditions

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    150 V

    TriodeSection

  • Plate current

    10 mA

    TriodeSection

Characteristic

  • Plate resistance

    6000 Ω

    TriodeSection

  • Transconductance

    6500 µS

    TriodeSection

  • Amplification factor

    40

    TriodeSection

SECTION 2

Pentode

Other

  • Plate voltage

    125 V

    PentodeSection

  • Screen voltage

    125 V

    PentodeSection

  • Plate current

    12 mA

    PentodeSection

  • Screen current

    3.5 mA

    PentodeSection

Characteristic

  • Plate resistance

    250000 Ω

    PentodeSection

  • Transconductance

    9000 µS

    PentodeSection

  • Cutoff characteristic

    Semi-remote

    PentodeSection

Data set 04

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Voltage ac or do

    6.3 V

    Section1

  • Current

    0 mA

    Section1;PublishedColumn1

  • Current

    45 A

    Section1;PublishedColumn2

  • Plate Supply Voltage

    200 V

    Section1;PublishedColumn1

  • Grid-No. Supply Voltage

    2 V

    Section1;PublishedColumn1

  • Grid-No. Supply Voltage

    150 V

    Section1;PublishedColumn2

  • Grid-No.l Voltage

    -6 V

    Section1

  • Cathode-Bias Resistor

    180 ohm

    Section1

  • Plate Resistance (Approx.)

    5750 ohm

    Section1;PublishedColumn1

  • Plate Resistance (Approx.)

    300000 ohm

    Section1;PublishedColumn2

  • Transconductance

    3300 µS

    Section1;PublishedColumn1

  • Transconductance

    6000 µS

    Section1;PublishedColumn2

  • Plate Current

    13 mA

    Section1;PublishedColumn1

  • Plate Current

    9.5 mA

    Section1;PublishedColumn2

  • Grid-No. Current

    2 mA

    Section1;PublishedColumn1

  • Grid-No. Current

    3 mA

    Section1;PublishedColumn2

  • for plate current of µamp

    10 V

    Section1;PublishedColumn1

  • for plate current of µamp

    -19 V

    Section1;PublishedColumn2

  • PLATE VOLTAGE. max. max

    300 V

    Section1;PublishedColumn1

  • VOLTAGE. - max

    3 V

    Section1

  • Positive bias value. mar.. max

    0 V

    Section1;PublishedColumn1

  • PLATE DISSIPATION. max. max,

    2.5 W

    Section1;PublishedColumn1

  • PLATE DISSIPATION. max. max,

    2 W

    Section1;PublishedColumn2

  • up to

    150 V

    Section1

  • respect to cathode max

    200 V

    Section1

  • respect to cathode + nax

    200 V

    Section1;PublishedColumn1

  • respect to cathode + nax

    14 V

    Section1;PublishedColumn2

  • ' Tne do component must not exceed

    100 V

    Section1

  • LNIO ON ATION q N t ICA,

    10 mA

    Section1;PublishedColumn1

  • LNIO ON ATION q N t ICA,

    1 mA

    Section1;PublishedColumn2

  • For fixed-bias operation. max. max

    0.5 Mohm

    Section1;PublishedColumn1

  • For fixed-bias operation. max. max

    0.25 Mohm

    Section1;PublishedColumn2

  • For cathode-bias operation. max. max

    1 Mohm

    Section1;PublishedColumn1

Capacitance

  • Grid to plate

    1.7 pF

    Section1

  • shield d heater

    2 pF

    Section1

  • shield heater

    6 pF

    Section1;PublishedColumn1

  • shield heater

    1.7 pF

    Section1;PublishedColumn2

  • Grid No.l to plate

    0.02 pF

    Section1

  • internal shield d heater

    6.5 pF

    Section1

  • internal shield d heater

    2.2 pF

    Section1

  • Triode grid to pentode plate mpx

    0.027 pF

    Section1

  • Pentode grid No.l to triode plate. max

    0.02 pF

    Section1

  • Pentode plate to triode plate max

    0.045 pF

    Section1

Characteristics

  • g E.F = &

    3 V

    Section1

  • E{ =

    8.3 V

    Section1

SECTION 2

Pentode

Other

  • Voltage ac or do

    6.3 V

    Section2

  • Current

    0 mA

    Section2;PublishedColumn1

  • Current

    45 A

    Section2;PublishedColumn2

  • Plate Supply Voltage

    200 V

    Section2;PublishedColumn1

  • Grid-No. Supply Voltage

    2 V

    Section2;PublishedColumn1

  • Grid-No. Supply Voltage

    150 V

    Section2;PublishedColumn2

  • Grid-No.l Voltage

    -6 V

    Section2

  • Cathode-Bias Resistor

    180 ohm

    Section2

  • Plate Resistance (Approx.)

    5750 ohm

    Section2;PublishedColumn1

  • Plate Resistance (Approx.)

    300000 ohm

    Section2;PublishedColumn2

  • Transconductance

    3300 µS

    Section2;PublishedColumn1

  • Transconductance

    6000 µS

    Section2;PublishedColumn2

  • Plate Current

    13 mA

    Section2;PublishedColumn1

  • Plate Current

    9.5 mA

    Section2;PublishedColumn2

  • Grid-No. Current

    2 mA

    Section2;PublishedColumn1

  • Grid-No. Current

    3 mA

    Section2;PublishedColumn2

  • for plate current of µamp

    10 V

    Section2;PublishedColumn1

  • for plate current of µamp

    -19 V

    Section2;PublishedColumn2

  • PLATE VOLTAGE. max. max

    300 V

    Section2;PublishedColumn1

  • VOLTAGE. - max

    3 V

    Section2

  • Positive bias value. mar.. max

    0 V

    Section2;PublishedColumn1

  • PLATE DISSIPATION. max. max,

    2.5 W

    Section2;PublishedColumn1

  • PLATE DISSIPATION. max. max,

    2 W

    Section2;PublishedColumn2

  • up to

    150 V

    Section2

  • respect to cathode max

    200 V

    Section2

  • respect to cathode + nax

    200 V

    Section2;PublishedColumn1

  • respect to cathode + nax

    14 V

    Section2;PublishedColumn2

  • ' Tne do component must not exceed

    100 V

    Section2

  • LNIO ON ATION q N t ICA,

    10 mA

    Section2;PublishedColumn1

  • LNIO ON ATION q N t ICA,

    1 mA

    Section2;PublishedColumn2

  • For fixed-bias operation. max. max

    0.5 Mohm

    Section2;PublishedColumn1

  • For fixed-bias operation. max. max

    0.25 Mohm

    Section2;PublishedColumn2

  • For cathode-bias operation. max. max

    1 Mohm

    Section2;PublishedColumn1

Capacitance

  • Grid to plate

    1.7 pF

    Section2

  • shield d heater

    2 pF

    Section2

  • shield heater

    6 pF

    Section2;PublishedColumn1

  • shield heater

    1.7 pF

    Section2;PublishedColumn2

  • Grid No.l to plate

    0.02 pF

    Section2

  • internal shield d heater

    6.5 pF

    Section2

  • internal shield d heater

    2.2 pF

    Section2

  • Triode grid to pentode plate mpx

    0.027 pF

    Section2

  • Pentode grid No.l to triode plate. max

    0.02 pF

    Section2

  • Pentode plate to triode plate max

    0.045 pF

    Section2

Characteristics

  • g E.F = &

    3 V

    Section2

  • E{ =

    8.3 V

    Section2

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-to-plate capacitance

    1.7 pF

  • Grid-to-cathode/heater capacitance

    2 pF

  • Plate-to-cathode/heater capacitance

    1.7 pF

Other

  • Plate supply voltage

    200 V

    ClassA

  • Plate current

    13 mA

    ClassA

SECTION 2

Pentode

Capacitance

  • Grid No.1-to-plate capacitance

    0.02 pF

  • Grid No.1-to-other-electrodes capacitance

    6.6 pF

  • Plate-to-other-electrodes capacitance

    2.2 pF

Other

  • Plate supply voltage

    200 V

    ClassA

  • Screen-grid voltage

    150 V

    ClassA

  • Plate current

    9.5 mA

    ClassA

  • Screen-grid current

    3 mA

    ClassA