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Voltage Pentode - Remote Cutoff (single) ·Pentode

EF83

Remote-cutoff audio-frequency pentode designed for electrically controlled variable-gain amplification and compression circuits.

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

Description

Remote-cutoff AF pentode.

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
1250000 Ω
Transconductance
0.0016 S
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
1 W
Max screen dissipation
0.2 W
Max cathode current
6 mA

Published ratings, characteristics and operating conditions reviewed.

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

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Plate voltage

    250 V

  • Screen-grid voltage

    50 V

  • Plate current

    4 mA

  • Screen-grid current

    1.15 mA

Capacitance

  • Input capacitance

    4 pF

  • Output capacitance

    5 pF

Data set 02

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Cutoff characteristic

    Remote cutoff

Data set 03

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

    1600 µS

    AFAmplifier

Other

  • Plate voltage

    250 V

    AFAmplifier

  • Screen voltage

    50 V

    AFAmplifier

  • Grid bias

    -1.6 V

    AFAmplifier

  • Plate current

    4 mA

    AFAmplifier

  • Screen current

    1.15 mA

    AFAmplifier

Data set 04

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

  • Maximum plate dissipation

    1 W

    Promoted published datasheet value

  • Vg‘] (Ig1 = 40,3 (JA) = max.,

    1.3 V

    Limiting values

Characteristic

  • Plate resistance

    1250000 Ω

    Promoted published datasheet value

  • Transconductance

    1600 µS

    Promoted published datasheet value

  • Chauffage: indirect par C.A. ou C.C. Ve =

    6.3 V

    Published datasheet value

  • Va =

    250 V

    Published datasheet value

  • Vg2 =

    50 V

    Published datasheet value

  • Vg1 =

    -1.6 V

    Published datasheet value

  • Ia =

    4 mA

    Published datasheet value

  • Ig2 =

    1.15 mA

    Published datasheet value

  • s =

    1.6 ma/V

    Published datasheet value

  • Vo =

    250 v

    Published datasheet value

  • Vg3 =

    0 v

    Published datasheet value

  • I, = 1,80

    1.65 ma

    Published datasheet value

  • Igo = 0,55

    0.25 mA

    Published datasheet value

  • Vp =

    250 V

    Published datasheet value

  • Vo= "3 3 8

    15 V

    Published datasheet value

  • dtot (-VR =1

    -3 V

    Published datasheet value

  • dtot (-VR =3

    -20 V

    Published datasheet value

Capacitance

  • Capacitances Cg1 =

    4 pF

    Capacitances