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Voltage Radio Detector Converter ·Pentode-Triode

5KE8

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9DC
Socket code
B9A
Base pins
9
Nominal heater
5.6 V / 450 mA

Description

Miniature type with frame-grid pentode unit used as combined oscillator-mixer tube in television receivers using an intermediate frequency in the order of 40 MHz. Outlines section, 6B; requires miniature 9-con- tact socket. Types 4KE8 and 5KE8 are identical with type 6KE8 except for heater ratings. 9DC 4KE8 5KE8 6KE8

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
5.6 V
Nominal heater current
450 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

Published ratings and characteristics promoted where clearly applicable; additional published values retained as parameters.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
125000 Ω
Transconductance
0.012 S
Amplification factor
40
Max plate voltage
280 V
Max screen voltage
280 V
Max plate dissipation
2 W
Max cathode current
20 mA

Published ratings and characteristics promoted where clearly applicable; additional published values retained as parameters.

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

    5 V

    Published nominal value

  • Heater or filament current

    600 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

    5 V

    Published nominal value

  • Heater or filament current

    600 mA

    Published nominal value

  • Transconductance

    12000 µS

    Published operating characteristic

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Transconductance

    14000

    Published value from supplied target entry

  • Plate Current

    120 mA

    Published value from supplied target entry

  • Grid-No

    1.8 mA

    Published value from supplied target entry

  • Grid-No.l-Circuit Resistance

    2.2 megohms

    Published value from supplied target entry

  • Grid-No

    0.01 megohm

    Published value from supplied target entry

  • fGrid-No

    2

    Published value from supplied target entry

  • Heater Voltage (ac/dc)

    6.3 volts

    Published value from supplied target entry

  • Heater Current

    0.4 ampere

    Published value from supplied target entry

  • Heater Warm-up Time (Average)

    11 seconds

    Published value from supplied target entry

  • Grid-No

    280 volts

    Published value from supplied target entry

  • Grid-No

    300

    Published value from supplied target entry

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

    0 volts

    Published value from supplied target entry

  • Cathode Current

    20 mA

    Published value from supplied target entry

  • Plate Dissipation

    2 watts

    Published value from supplied target entry

  • Grid-No

    2

    Published value from supplied target entry

  • For grid-No

    0.5 volts

    Published value from supplied target entry

  • For grid-No

    300 volts

    Published value from supplied target entry

  • Plate Supply Voltage

    125 volts

    Published value from supplied target entry

  • Grid-No

    125 volts

    Published value from supplied target entry

  • Grid-No.l Supply Voltage

    0 volts

    Published value from supplied target entry

  • Amplification Factor

    40

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    125000 ohms

    Published value from supplied target entry

  • Transconductance

    12000 umhos

    Published value from supplied target entry

  • Plate Current

    10 mA

    Published value from supplied target entry

  • Grid-No

    2.8 mA

    Published value from supplied target entry

  • For plate current of

    5 volts

    Published value from supplied target entry

  • For plate current of

    -3 volts

    Published value from supplied target entry

  • Heater Voltage (ac/dc)

    40 volts

    Published value from supplied target entry

  • Heater Current

    0.3 amperes

    Published value from supplied target entry

  • Plate Voltage

    160 volts

    Published value from supplied target entry

  • Grid-No

    0 volts

    Published value from supplied target entry

  • Grid-No

    160 volts

    Published value from supplied target entry

  • Grid-No.l Voltage

    0 volts

    Published value from supplied target entry

  • Plate Current*

    1400 mA

    Published value from supplied target entry

  • Grid-No

    45 mA

    Published value from supplied target entry

  • Plate Supply Voltage

    700 volts

    Published value from supplied target entry

  • Peak Positive-Pulse Plate Voltage*

    7000 volts

    Published value from supplied target entry

  • Grid-No

    700 volts

    Published value from supplied target entry

  • Grid-No

    250 volts

    Published value from supplied target entry

  • Grid-No

    7 watts

    Published value from supplied target entry

  • Cathode Current

    500 mA

    Published value from supplied target entry

Capacitance

  • Grid to Plate

    1.3 pF

    Published value from supplied target entry

  • Grid to Cathode, Heater, Pentode Cathode, Pentode Grid No

    3

    Published value from supplied target entry

  • Plate to Cathode, Heater, Pentode Cathode, Pentode Grid No

    3

    Published value from supplied target entry

  • Plate to Cathode, Heater, Grid No

    3

    Published value from supplied target entry

  • Heater to Triode Cathode and Pentode Cathode

    5.5 pF

    Published value from supplied target entry

  • Plate to Grid-No.l

    2.5 pF

    Published value from supplied target entry

  • Grid-No.l to Heater

    0.2 pF

    Published value from supplied target entry

Other

  • Plate Dissipation (Absolute-Maximum Value)

    34 watts

    Published value from supplied target entry