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Voltage Triode Pentode ·Pentode-Triode

ECL84

High-mu triode plus sharp-cutoff pentode for television sync/noise circuits and video-output service; pentode dissipation is about 4 watts.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9HX
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 720 mA

Description

High-mu triode plus sharp-cutoff pentode used in television sync/noise circuits and video-output service.

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

9HX - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Base PinBG1 — Control Grid

Original chart label 2G1; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN2Base PinBP — Plate (Anode)

Original chart label 2P; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN3Base PinBK — Cathode

Original chart label 2K; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN4Base Pin—H — Heater

Original chart label H; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN5Base Pin—H — Heater

Original chart label H; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN6Base PinAP — Plate (Anode)

Original chart label 1P; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN7Base PinAG3 — Suppressor GridGroup 9HX7

Original chart label 1G3; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN7Base PinAK — CathodeGroup 9HX7

Original chart label 1K; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN7Base Pin—IS — Internal ScreenGroup 9HX7

Original chart label IS; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN8Base PinAG1 — Control Grid

Original chart label 1G1; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

PIN9Base PinAG2 — Screen Grid

Original chart label 1G2; manufacturer verification pending

Unverified

EIA Base Connections printed p133, 9HX

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
20000 Ω
Transconductance
0.0045 S
Amplification factor
65
Max plate voltage
250 V
Max plate dissipation
1 W
Max cathode current
15 mA

Published maximum ratings/characteristics promoted from source.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
18000 Ω
Transconductance
0.0104 S
Amplification factor
36
Max plate voltage
550 V
Max screen voltage
250 V
Max plate dissipation
4 W
Max screen dissipation
1.7 W
Max cathode current
40 mA

Published maximum ratings/characteristics promoted from source.

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

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    720 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    1 W

Characteristic

  • Transconductance

    4500 µS

    Typical

  • Amplification Factor

    65

    Typical

SECTION 2

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    720 mA

    Nominal

  • Maximum Plate Voltage

    550 V

  • Maximum Screen Voltage

    250 V

  • Maximum Plate Dissipation

    4 W

Characteristic

  • Transconductance

    10400 µS

    Typical

  • Amplification Factor

    36

    Typical

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Triode plate voltage

    200 V

    TriodeSection KeyedAGC

  • Triode control-grid bias

    -1.7 V

    TriodeSection KeyedAGC

  • Triode plate current

    3 mA

    TriodeSection KeyedAGC

Characteristic

  • Triode amplification factor

    65

    TriodeSection KeyedAGC

SECTION 2

Pentode

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    720 mA

    Published heater rating

  • Pentode plate resistance

    3000 ohm

    PentodeSection VideoOutput

  • Pentode transconductance

    9700 µS

    PentodeSection VideoOutput

Other

  • Pentode screen voltage

    220 V

    PentodeSection VideoOutput

  • Pentode plate current

    18 mA

    PentodeSection VideoOutput

  • Pentode screen current

    3.1 mA

    PentodeSection VideoOutput

Data set 03

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    720 mA

    Published heater rating

  • Triode transconductance

    4000 µS

    TriodeSection

  • Triode amplification factor

    65

    TriodeSection

  • Pentode transconductance

    10400 µS

    PentodeSection

Other

  • Triode plate voltage

    200 V

    TriodeSection

  • Triode grid bias

    -1.7 V

    TriodeSection

  • Triode plate current

    3 mA

    TriodeSection

  • Pentode plate voltage

    200 V

    PentodeSection

  • Pentode screen voltage

    200 V

    PentodeSection

  • Pentode plate current

    18 mA

    PentodeSection

Data set 04

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    720 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    1 W

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    4500 µS

    Typical

  • Amplification Factor

    65

    Typical

  • Plate Resistance

    20000 ohm

    Typical

SECTION 2

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    720 mA

    Nominal

  • Maximum Plate Voltage

    550 V

  • Maximum Screen Voltage

    250 V

  • Maximum Plate Dissipation

    4 W

  • Maximum Screen Dissipation

    1.7 W

  • Maximum Cathode Current

    40 mA

Characteristic

  • Transconductance

    10500 µS

    Typical

  • Plate Resistance

    18000 ohm

    Typical

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage (ac/dc) 6.3

    10.2 V

    Published in approved ECL84 target datasheet entry; Section1

  • Heater Current 0.72

    450 mA

    Published in approved ECL84 target datasheet entry; Section1

  • Plate Supply Voltage 550

    550 V

    Published in approved ECL84 target datasheet entry; Section1

  • Plate Voltage 300

    300 V

    Published in approved ECL84 target datasheet entry; Section1

  • Grid-No.2 Voltage

    300 V

    Published in approved ECL84 target datasheet entry; Section1

  • Cathode Current 12

    40 mA

    Published in approved ECL84 target datasheet entry; Section1

  • Plate Dissipation 1

    4 W

    Published in approved ECL84 target datasheet entry; Section1

  • Grid-No.2 Input

    1.7 W

    Published in approved ECL84 target datasheet entry; Section1

  • Plate Voltage 200 170 200

    220 V

    Published in approved ECL84 target datasheet entry; Section1

  • For fixed-bias operation 1

    1 MΩ

    Published in approved ECL84 target datasheet entry; Section1

  • For cathode-bias operation 3

    2 MΩ

    Published in approved ECL84 target datasheet entry; Section1

  • • With maximum duty factor of 0.18 and maximum pulse duration of

    18 microseconds

    Published in approved ECL84 target datasheet entry; Section1

  • the frequency range from 470 to

    890 MHz

    Published in approved ECL84 target datasheet entry; Section1

Characteristic

  • Grid No.l Voltage —1.7 —2.1

    -3.4 V

    Published in approved ECL84 target datasheet entry; Section1

  • Plate Resistance (Approx.) — 0.1 0.13

    0.15 MΩ

    Published in approved ECL84 target datasheet entry; Section1

  • Transconductance 4000 11000 10400

    10000 µS

    Published in approved ECL84 target datasheet entry; Section1

  • Plate Current 3 18 18

    18 mA

    Published in approved ECL84 target datasheet entry; Section1

  • Grid-No.2 Current — 3 3

    3 mA

    Published in approved ECL84 target datasheet entry; Section1

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved ECL84 target datasheet entry; Section1

  • Heater Current

    225 mA

    Published in approved ECL84 target datasheet entry; Section1

  • Grid to Plate

    18 pF

    Published in approved ECL84 target datasheet entry; Section1

  • Grid to Cathode and Heater

    2.2 pF

    Published in approved ECL84 target datasheet entry; Section1

  • Plate to Cathode and Heater

    1.3 pF

    Published in approved ECL84 target datasheet entry; Section1

SECTION 2

Pentode

Other

  • Heater Voltage (ac/dc) 6.3

    10.2 V

    Published in approved ECL84 target datasheet entry; Section2

  • Heater Current 0.72

    450 mA

    Published in approved ECL84 target datasheet entry; Section2

  • Plate Supply Voltage 550

    550 V

    Published in approved ECL84 target datasheet entry; Section2

  • Plate Voltage 300

    300 V

    Published in approved ECL84 target datasheet entry; Section2

  • Grid-No.2 Voltage

    300 V

    Published in approved ECL84 target datasheet entry; Section2

  • Cathode Current 12

    40 mA

    Published in approved ECL84 target datasheet entry; Section2

  • Plate Dissipation 1

    4 W

    Published in approved ECL84 target datasheet entry; Section2

  • Grid-No.2 Input

    1.7 W

    Published in approved ECL84 target datasheet entry; Section2

  • Plate Voltage 200 170 200

    220 V

    Published in approved ECL84 target datasheet entry; Section2

  • For fixed-bias operation 1

    1 MΩ

    Published in approved ECL84 target datasheet entry; Section2

  • For cathode-bias operation 3

    2 MΩ

    Published in approved ECL84 target datasheet entry; Section2

  • • With maximum duty factor of 0.18 and maximum pulse duration of

    18 microseconds

    Published in approved ECL84 target datasheet entry; Section2

  • the frequency range from 470 to

    890 MHz

    Published in approved ECL84 target datasheet entry; Section2

Characteristic

  • Grid No.l Voltage —1.7 —2.1

    -3.4 V

    Published in approved ECL84 target datasheet entry; Section2

  • Plate Resistance (Approx.) — 0.1 0.13

    0.15 MΩ

    Published in approved ECL84 target datasheet entry; Section2

  • Transconductance 4000 11000 10400

    10000 µS

    Published in approved ECL84 target datasheet entry; Section2

  • Plate Current 3 18 18

    18 mA

    Published in approved ECL84 target datasheet entry; Section2

  • Grid-No.2 Current — 3 3

    3 mA

    Published in approved ECL84 target datasheet entry; Section2

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved ECL84 target datasheet entry; Section2

  • Heater Current

    225 mA

    Published in approved ECL84 target datasheet entry; Section2

  • Grid to Plate

    18 pF

    Published in approved ECL84 target datasheet entry; Section2

  • Grid to Cathode and Heater

    2.2 pF

    Published in approved ECL84 target datasheet entry; Section2

  • Plate to Cathode and Heater

    1.3 pF

    Published in approved ECL84 target datasheet entry; Section2

Data set 06

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater voltage Vi

    6.3 V

    Published datasheet value

  • Heater current If

    720 mA

    Published datasheet value

Other

  • Cathode to heater voltage Vs max

    200 V

    Published datasheet value