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Voltage Radio Detector Converter ·Pentode-Triode

4KE8

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

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9DC
Socket code
B9A
Base pins
9
Nominal heater
4.5 V / 600 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
4.5 V
Nominal heater current
600 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
300 V
Max plate dissipation
1.5 W

Oscillator triode section.

Section 2

Pentode

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

Frame-grid mixer pentode section.

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

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    125 V

    OscillatorMixer;40MHz

  • Cathode resistor

    68 ohm

    OscillatorMixer;40MHz

  • Plate current

    13 mA

    OscillatorMixer;40MHz

Characteristic

  • Plate resistance

    5000 ohm

    OscillatorMixer;40MHz

  • Transconductance

    8000 uS

    OscillatorMixer;40MHz

  • Amplification factor

    40

    OscillatorMixer;40MHz

  • Triode grid-to-plate capacitance

    1.3 pF

  • Triode input capacitance

    2.4 pF

  • Triode output capacitance

    2 pF

  • Heater warm-up time

    11 s

    ControlledWarmUp

SECTION 2

Pentode

Other

  • Plate voltage

    125 V

    OscillatorMixer;40MHz

  • Grid 2 voltage

    125 V

    OscillatorMixer;40MHz

  • Cathode resistor

    33 ohm

    OscillatorMixer;40MHz

  • Plate current

    10 mA

    OscillatorMixer;40MHz

  • Grid 2 current

    2.8 mA

    OscillatorMixer;40MHz

Characteristic

  • Plate resistance

    125000 ohm

    OscillatorMixer;40MHz

  • Transconductance

    12000 uS

    OscillatorMixer;40MHz

  • Pentode grid 1-to-plate capacitance

    0.015 pF

  • Pentode input capacitance

    5 pF

  • Pentode output capacitance

    3.4 pF

Data set 02

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