Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage Pentode - Sharp Cutoff (single) ·Pentode

4JD6

Sharp-cutoff pentode designed for television IF, picture-IF, video, or VHF tuner amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9PM
Socket code
B9A
Base pins
9
Nominal heater
4.5 V / 450 mA

Description

Sharp-cutoff frame-grid miniature pentode used as a television IF amplifier around 40 MHz.

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
9PM
Socket code
B9A
Base pins
9
Nominal heater voltage
4.5 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9PM - 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
160000 Ω
Transconductance
0.014 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
2.5 W
Max screen dissipation
0.7 W

Reference/equivalence-only source: ratings/characteristics for this section are not reproduced; missing promoted values intentionally not inferred from the external 6JD6 datasheet.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    125 V

  • Screen-grid voltage

    125 V

  • Cathode bias resistor

    56 Ohm

  • Plate current

    15 mA

  • Screen-grid current

    4 mA

Characteristics

  • Plate resistance

    160000 Ohm

  • Transconductance

    14000 uS

  • Control-grid cutoff voltage

    -4.5 V

    At600uS

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater Voltage

    4.5 V

  • Heater Current

    450 mA

  • Transconductance

    14000 uS

    RepresentativePublishedPoint

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Plate Dissipation

    2.5 W

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • GRID

    0.019 pF

    | GRID 1 TO PLATE -MAX. 0.019 pf

Other

  • HEATER WARM-UP TIME

    11 s

    Average Characteristics | HEATER WARM-UP TIME 11 SECONDS

  • LIMITS OF SUPPLIED CURRENT

    30 mA

    Average Characteristics | LIMITS OF SUPPLIED CURRENT 450 -* 30 mA

  • PLATE VOLTAGE

    330 V

    Maximum Ratings | PLATE VOLTAGE 330 VOLTS

  • GRID

    330 V

    Maximum Ratings | GRID 2 SUPPLY VOLTAGE 330 VOLTS

  • POSITIVE DC GRID

    0 V

    Maximum Ratings | POSITIVE DC GRID 1 VOLTAGE 0 VOLTS

  • PLATE DISSIPATION

    2.5 W

    Maximum Ratings | PLATE DISSIPATION 2.5 WATTS

  • PLATE VOLTAGE

    125 V

    Maximum Ratings | PLATE VOLTAGE 125 VOLTS

  • GRID

    125 V

    Maximum Ratings | GRID 2 VOLTAGE 125 VOLTS

  • CATHODE

    56 ohm

    Maximum Ratings | CATHODE 81AS RESISTOR 56 OHMS

  • PLATE CURRENT

    15 mA

    Maximum Ratings | PLATE CURRENT 15 mA

  • GRID

    4 mA

    Maximum Ratings | GRID 2 CURRENT 4 mA

  • GRID

    -4.5 V

    Maximum Ratings | GRID 1 VOLTAGE FOR Gm = 600 NMHOS -4.5 VOLTS

  • GRID

    1 V

    Average Characteristics | GRID 1 VOLTS

  • GRID

    2 V

    Average Characteristics | GRID 2 VOLTS

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater Voltage

    4.5 V

  • Heater Current

    450 mA

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    125 V

    IFAmplifier

  • Grid 2 voltage

    125 V

    IFAmplifier

  • Cathode bias resistor

    56 ohm

    IFAmplifier

  • Plate current

    15 mA

    IFAmplifier

  • Grid 2 current

    4 mA

    IFAmplifier

Characteristic

  • Heater warm-up time

    11 s

    ControlledWarmUp

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Peak value

    200 V

    Other;PublishedValue1

  • Peak value

    200 V

    Other;PublishedValue2

  • Average value

    100 V

    Other;PublishedValue1

  • Average value

    100 V

    Other;PublishedValue2

  • Plate Voltage

    330 V

    MaximumRating

  • Grid-No.3 (Suppressor-Grid) Voltage, Positive value

    0 V

    MaximumRating

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

    330 V

    MaximumRating

  • Grid-No.l (Control-Grid) Voltage, Positive-bias value

    0 V

    MaximumRating

  • Plate Dissipation

    2.5 W

    MaximumRating

  • For grid-No.2 voltages up to 165 volts

    0.6 V

    MaximumRating

  • ©2

    0 V

    MaximumRating;PublishedValue1

  • ©2

    5 V

    MaximumRating;PublishedValue2

  • PLATE VOLTS

    5 V

    MaximumRating

  • For fixed-bias operation

    0.25 megohm

    MaximumCircuitValue

  • For cathode-bias operation

    1 megohm

    MaximumCircuitValue

Capacitance

  • Grid No.l to Plate

    0.019 pF

    Capacitance

  • Internal Shield

    8.2 pF

    Capacitance

Characteristic

  • Plate Supply Voltage

    125 V

    Characteristic

  • Grid-No.3 Voltage

    0 V

    Characteristic

  • Grid-No.2 Supply Voltage

    125 V

    Characteristic

  • Grid-No.l Supply Voltage

    0 V

    Characteristic

  • Cathode-Bias Resistor

    56 ohm

    Characteristic

  • Plate Resistance (Approx.)

    160000 ohm

    Characteristic

  • Transconductance

    14000 uS

    Characteristic

  • Plate Current

    15 mA

    Characteristic

  • Grid-No.2 Current

    4 mA

    Characteristic