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Voltage Pentode - Remote Cutoff (single) ·Pentode

EF89

Variable-mu pentode for gain-controlled RF and intermediate-frequency amplification with substantial signal capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
NOVAL
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 200 mA

Description

Variable-mu pentode for radio-frequency and intermediate-frequency amplification.

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

NOVAL - 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
1000000 Ω
Transconductance
0.0036 S
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
4.25 W
Max screen dissipation
0.45 W
Max cathode current
16.5 mA

Promoted ratings and characteristics are taken from the printed target-tube entry in the approved PDF.

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 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    200 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Screen Voltage

    300 V

  • Maximum Plate Dissipation

    2.5 W

Characteristic

  • Transconductance

    4500 µS

    Typical

Data set 02

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    200 mA

  • EquivalentType

    6DA6

Data set 03

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    200 mA

  • CutoffCharacteristic

    Variable mu

Data set 04

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    RFIFAmplifier

  • Screen voltage

    100 V

    RFIFAmplifier

  • Control-grid voltage

    -1.95 V

    RFIFAmplifier

  • Plate current

    9 mA

    RFIFAmplifier

  • Screen current

    3 mA

    RFIFAmplifier

  • Application

    High-gain remote-cutoff RF/IF pentode

    Section1

Characteristic

  • Plate resistance

    900000 Ω

    Section1

  • Transconductance

    5000 µS

    Section1

Data set 05

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    200 mA

    Published heater rating

  • Transconductance

    900 µS

    RForIFAmplifier

  • Cutoff grid bias

    -20 V

    RemoteCutoff

Other

  • Plate voltage

    250 V

    RForIFAmplifier

  • Screen voltage

    100 V

    RForIFAmplifier

  • Plate current

    9 mA

    RForIFAmplifier

  • Screen current

    3 mA

    RForIFAmplifier

Data set 06

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate voltage

    250 V

    RFOrIFAmplifier

  • Screen-grid voltage

    100 V

    RFOrIFAmplifier

  • Plate current

    10 mA

    RFOrIFAmplifier

  • Screen-grid current

    4 mA

    RFOrIFAmplifier

  • Transconductance

    4.2 mA/V

    RFOrIFAmplifier

Other

  • Maximum plate voltage

    300 V

  • Maximum plate dissipation

    2.25 W

  • Maximum screen-grid voltage

    300 V

  • Maximum screen-grid dissipation

    0.45 W

  • Maximum cathode current

    16.5 mA

Capacitance

  • Input capacitance

    5.5 pF

  • Output capacitance

    5.1 pF

  • Anode-control-grid capacitance

    0.002 pF

    Maximum

Data set 07

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    200 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Screen Voltage

    300 V

  • Maximum Plate Dissipation

    2.25 W

  • Maximum Screen Dissipation

    0.5 W

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    4500 µS

    Typical

  • Plate Resistance

    1000000 ohm

    Typical

Data set 08

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    200 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Screen Voltage

    300 V

  • Maximum Plate Dissipation

    2.25 W

  • Maximum Screen Dissipation

    0.45 W

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    4500 µS

    Typical

  • Plate Resistance

    1000000 ohm

    Typical

Data set 09

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater voltage

    6.3 V

    Published nominal/basic-parameter heater condition.

  • Heater current

    200 mA

    Published heater current.

  • Plate current

    9 mA

    Published basic-parameter operating point.

  • Screen current

    3 mA

    Published basic-parameter operating point.

  • Transconductance

    3600 µS

    Published basic-parameter value; normalized to µS.

  • Plate resistance

    1000000 Ω

    Published internal/plate resistance.

  • Amplification factor

    19

    Published amplification factor.

  • Input capacitance

    5.5 pF

    Published in the filename-designated tube entry.

  • Output capacitance

    5.1 pF

    Published in the filename-designated tube entry.

  • Grid-to-plate capacitance

    0.003 pF

    Published in the filename-designated tube entry.

Other

  • Maximum plate voltage

    300 V

    Published limiting operating value.

  • Maximum screen voltage

    300 V

    Published limiting operating value.

  • Maximum cathode current

    16.5 mA

    Published limiting cathode-current value.

  • Maximum plate dissipation

    4.25 W

    Published limiting plate-dissipation value.

  • Maximum screen dissipation

    0.45 W

    Published limiting screen-dissipation value.

Data set 10

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

    Heating

  • Heater current

    200 mA

    Heating

  • Maximum plate voltage

    300 V

    Promoted published datasheet value

  • Maximum screen voltage

    300 V

    Promoted published datasheet value

  • Va, = max

    550 V

    Limiting values

  • Va = max

    300 V

    Limiting values

  • Vgo, = max

    550 V

    Limiting values

  • Vg2 = max

    300 V

    Limiting values

  • Ix = max

    16.5 mA

    Limiting values

  • Vir = maX

    100 V

    Limiting values

Characteristic

  • Transconductance

    4700 µS

    Promoted published datasheet value

  • apazi tdten Cgi= 5,5 p :g1f =

    0.05 pF

    Published datasheet value

  • Vg2 = 100 85

    100 V

    Published datasheet value

  • Ia = 9 9

    12 mA

    Published datasheet value

  • Igz = 3 3,2

    4.4 mA

    Published datasheet value

  • Va=Vp = 250

    200 v

    Published datasheet value

  • Vgl = 0

    0 v

    Published datasheet value

  • Published electrical value

    0.16 mA/V

    Published datasheet value

  • S = 4,7 0,22 5,15

    0.15 mA/V

    Published datasheet value

  • Vp =

    200 V

    Published datasheet value

  • Vo = 200

    -250 V

    Published datasheet value

  • Vo =

    250 V

    Published datasheet value

  • g Vp =

    250 V

    Published datasheet value

  • N Vb =

    200 V

    Published datasheet value