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Voltage Radio Detector Converter ·Pentode-Triode

6KE8

Medium-mu triode plus frame-grid sharp-cutoff pentode used as a combined oscillator-mixer tube in television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9DC
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 400 mA

Description

Medium-mu triode plus frame-grid sharp-cutoff pentode used as a combined oscillator-mixer tube in television receivers.

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

9DC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN12PBP — Plate (Anode)

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN21G1AG1 — Control Grid

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN31G2AG2 — Screen Grid

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN4H—H — Heater

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN5H—H — Heater

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN61PAP — Plate (Anode)

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN71G3AG3 — Suppressor GridGroup 9DC7

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN7ISAIS — Internal ScreenGroup 9DC7

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN71KAK — CathodeGroup 9DC7

Chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN82KBK — Cathode

EIA chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DC

PIN92G1BG1 — Control Grid

EIA chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DC

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
5000 Ω
Transconductance
0.008 S
Amplification factor
40
Max plate voltage
280 V
Max plate dissipation
2 W
Max cathode current
20 mA

Representative electrical section from supplied RCA data sheet.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
125000 Ω
Transconductance
0.012 S
Max plate voltage
280 V
Max screen voltage
280 V
Max plate dissipation
2 W
Max screen dissipation
0.5 W
Max cathode current
20 mA

Representative electrical section from supplied RCA data sheet.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    450 mA

    Published nominal value

  • Pentode transconductance

    12000 µS

    Published headline value

Other

  • Application

    Combined oscillator-mixer converter

    Television receiver

SECTION 2

Pentode

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    450 mA

    Published nominal value

  • Transconductance

    12000 µS

    Published operating characteristic

Data set 02

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage nominal

    6.3 V

  • Heater current

    400 mA

  • Maximum plate voltage

    280 V

    Promoted field corroboration

Characteristics

  • Voltage (AC or DC)

    6.3 V

    Published table column

  • Current at heater volts

    6.3 V

    Published table column

  • Plate resistance

    5000 ohm

    Promoted field corroboration

  • Transconductance

    8000 µS

    Promoted field corroboration

  • Amplification factor

    40

    Promoted field corroboration

SECTION 2

Pentode

Other

  • Heater voltage nominal

    6.3 V

  • Heater current

    400 mA

  • PLATE VOLTAGE

    280 V

    Published source row

  • PLATE VOLTAGE (value 2)

    280 V

    Published source row

  • GRIC-No

    2 V

    Published source row

  • GRIC-No (value 2)

    280 V

    Published source row

  • GRID-No

    2

    Published source row

  • GRID-No (value 2)

    2

    Published source row

  • GRID-No

    1

    Published source row

  • CATHODE CURRENT

    20 mA

    Published source row

  • CATHODE CURRENT (value 2)

    20 mA

    Published source row

  • For grid-No

    2

    Published source row

  • For grid-No

    2

    Published source row

  • between

    140

    Published source row

  • between (value 2)

    280

    Published source row

  • between (value 3)

    2

    Published source row

  • PLATE DISSIPATION

    2 W

    Published source row

  • PLATE DISSIPATION (value 2)

    2 W

    Published source row

Characteristics

  • Voltage (AC or DC)

    0.6 V

    Published table column

  • Current at heater volts

    0 V

    Published table column

  • Plate Supply Voltage

    125 V

    Published source row

  • Plate Supply Voltage (value 2)

    125 V

    Published source row

  • Grid-No

    2 V

    Published source row

  • Grid-No (value 2)

    125 V

    Published source row

  • Cathode Resistor

    68 ohm

    Published source row

  • Cathode Resistor (value 2)

    33 ohm

    Published source row

  • Plate Resistance (Approx )

    5000 ohm

    Published source row

  • Plate Resistance (Approx ) (value 2)

    125000 ohm

    Published source row

  • Transconductance

    8000 µS

    Published source row

  • Transconductance (value 2)

    12000 µS

    Published source row

  • Plate Current

    13 mA

    Published source row

  • Plate Current (value 2)

    10 mA

    Published source row

  • Grid-No

    2 mA

    Published source row

  • Grid-No (value 2)

    2.8 mA

    Published source row

  • Grid-No

    1

    Published source row

  • Grid No

    1

    Published source row

  • Grid No

    2

    Published source row

Capacitance

  • Grid No

    1 pF

    Published source row

  • Grid No (value 2)

    0 pF

    Published source row

  • Grid No (value 3)

    15 pF

    Published source row

  • Grid No

    1

    Published source row

  • Grid No (value 2)

    3

    Published source row

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Grid-No. 3-Circu it Resistance

    0.01 MΩ

    Published in approved 6KE8 target datasheet entry; Section1

  • # Pulse duration must not exceed 15% of a horizontal scanning cycle (

    10 microseconds

    Published in approved 6KE8 target datasheet entry; Section1

  • Heater Voltage (ac/dc) 4.5 5.6

    6.3 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Heater Current 0.6 0.45

    400 mA

    Published in approved 6KE8 target datasheet entry; Section1

  • Heater Warm-up Time (Average) 11

    11 seconds

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Voitagc 280

    280 V

    Published in approved 6KE8 target datasheet entry; Section1

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

    280 V

    Published in approved 6KE8 target datasheet entry; Section1

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

    0 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Cathode Current

    20 mA

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Dissipation

    2 W

    Published in approved 6KE8 target datasheet entry; Section1

  • For grid-No. 2 voltages up to

    140 V

    Published in approved 6KE8 target datasheet entry; Section1

  • For grid-No.2 voltages between 140 and

    280 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Supply Voltage 125

    125 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Supply Voltage

    125 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.l Supply Voltage 0

    0 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Cathode-Bias Resistor 68

    33 Ω

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Current 13

    10 mA

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Current

    2.8 mA

    Published in approved 6KE8 target datasheet entry; Section1

  • For plate current of 60 /zA -—

    -3 V

    Published in approved 6KE8 target datasheet entry; Section1

  • For fixed-bias operation 0.5

    0.25 MΩ

    Published in approved 6KE8 target datasheet entry; Section1

  • For cathode-bias operation 1

    0.5 MΩ

    Published in approved 6KE8 target datasheet entry; Section1

  • Heater Voltage (ac/dc) 6.3

    40 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Heater Current 2

    300 mA

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate to Grid-No.l

    2.5 pF

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.l to Heater

    0.2 pF

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Supply Voltage

    700 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Peak Positive-Pulse Plate Voltage*

    7000 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Voltage (zero-current)

    700 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Voltage

    250 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Dissipation (Absolute-Maximum Value)

    34 W

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Input

    7 W

    Published in approved 6KE8 target datasheet entry; Section1

  • Cathode Current

    500 mA

    Published in approved 6KE8 target datasheet entry; Section1

Capacitance

  • Grid to Plate

    1.3 pF

    Published in approved 6KE8 target datasheet entry; Section1

  • and Internal Shield

    2.4 pF

    Published in approved 6KE8 target datasheet entry; Section1

  • and Internal Shield

    2 pF

    Published in approved 6KE8 target datasheet entry; Section1

  • and Internal Shield

    5 pF

    Published in approved 6KE8 target datasheet entry; Section1

  • and Internal Shield

    3.4 pF

    Published in approved 6KE8 target datasheet entry; Section1

Characteristic

  • Plate Resistance (Approx.) 5000

    125000 Ω

    Published in approved 6KE8 target datasheet entry; Section1

  • Transconductance 8000

    12000 µS

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Voltage 45

    160 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.3 Voltage! 0

    0 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Voltage . 160

    160 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.l Voltage . 0

    0 V

    Published in approved 6KE8 target datasheet entry; Section1

  • Plate Current* .... 1000 (min.)

    1400 mA

    Published in approved 6KE8 target datasheet entry; Section1

  • Grid-No.2 Current"

    45 mA

    Published in approved 6KE8 target datasheet entry; Section1

SECTION 2

Pentode

Other

  • Grid-No. 3-Circu it Resistance

    0.01 MΩ

    Published in approved 6KE8 target datasheet entry; Section2

  • # Pulse duration must not exceed 15% of a horizontal scanning cycle (

    10 microseconds

    Published in approved 6KE8 target datasheet entry; Section2

  • Heater Voltage (ac/dc) 4.5 5.6

    6.3 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Heater Current 0.6 0.45

    400 mA

    Published in approved 6KE8 target datasheet entry; Section2

  • Heater Warm-up Time (Average) 11

    11 seconds

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Voitagc 280

    280 V

    Published in approved 6KE8 target datasheet entry; Section2

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

    280 V

    Published in approved 6KE8 target datasheet entry; Section2

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

    0 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Cathode Current

    20 mA

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Dissipation

    2 W

    Published in approved 6KE8 target datasheet entry; Section2

  • For grid-No. 2 voltages up to

    140 V

    Published in approved 6KE8 target datasheet entry; Section2

  • For grid-No.2 voltages between 140 and

    280 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Supply Voltage 125

    125 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Supply Voltage

    125 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.l Supply Voltage 0

    0 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Cathode-Bias Resistor 68

    33 Ω

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Current 13

    10 mA

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Current

    2.8 mA

    Published in approved 6KE8 target datasheet entry; Section2

  • For plate current of 60 /zA -—

    -3 V

    Published in approved 6KE8 target datasheet entry; Section2

  • For fixed-bias operation 0.5

    0.25 MΩ

    Published in approved 6KE8 target datasheet entry; Section2

  • For cathode-bias operation 1

    0.5 MΩ

    Published in approved 6KE8 target datasheet entry; Section2

  • Heater Voltage (ac/dc) 6.3

    40 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Heater Current 2

    300 mA

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate to Grid-No.l

    2.5 pF

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.l to Heater

    0.2 pF

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Supply Voltage

    700 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Peak Positive-Pulse Plate Voltage*

    7000 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Voltage (zero-current)

    700 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Voltage

    250 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Dissipation (Absolute-Maximum Value)

    34 W

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Input

    7 W

    Published in approved 6KE8 target datasheet entry; Section2

  • Cathode Current

    500 mA

    Published in approved 6KE8 target datasheet entry; Section2

Capacitance

  • Grid to Plate

    1.3 pF

    Published in approved 6KE8 target datasheet entry; Section2

  • and Internal Shield

    2.4 pF

    Published in approved 6KE8 target datasheet entry; Section2

  • and Internal Shield

    2 pF

    Published in approved 6KE8 target datasheet entry; Section2

  • and Internal Shield

    5 pF

    Published in approved 6KE8 target datasheet entry; Section2

  • and Internal Shield

    3.4 pF

    Published in approved 6KE8 target datasheet entry; Section2

Characteristic

  • Plate Resistance (Approx.) 5000

    125000 Ω

    Published in approved 6KE8 target datasheet entry; Section2

  • Transconductance 8000

    12000 µS

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Voltage 45

    160 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.3 Voltage! 0

    0 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Voltage . 160

    160 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.l Voltage . 0

    0 V

    Published in approved 6KE8 target datasheet entry; Section2

  • Plate Current* .... 1000 (min.)

    1400 mA

    Published in approved 6KE8 target datasheet entry; Section2

  • Grid-No.2 Current"

    45 mA

    Published in approved 6KE8 target datasheet entry; Section2