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Voltage Radio Detector Converter ·Pentode-Triode

5EA8

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

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9AE
Socket code
B9A
Base pins
9
Nominal heater
4.7 V / 600 mA

Description

Miniature medium-mu triode–sharp-cutoff pentode used as a combined oscillator and mixer in television receivers with an intermediate frequency 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
9AE
Socket code
B9A
Base pins
9
Nominal heater voltage
4.7 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9AE - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN12PBP — Plate (Anode)

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN21G1AG1 — Control Grid

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN31G2AG2 — Screen Grid

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN4H—H — Heater

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN5H—H — Heater

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN61PAP — Plate (Anode)

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN71G3AG3 — Suppressor GridGroup 9AE7

Source transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN7ISAIS — Internal ScreenGroup 9AE7

Source transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN71KAK — CathodeGroup 9AE7

Source transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN82KBK — Cathode

Source transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

PIN92G1BG1 — Control Grid

Source transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9AE

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
330 V
Max plate dissipation
2.5 W

Referenced ratings not printed in this source; not inferred.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
200000 Ω
Transconductance
0.0064 S
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
3.1 W
Max screen dissipation
0.55 W

Referenced ratings not printed in this source; not inferred.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    4.7 V

  • Heater current

    600 mA

SECTION 2

Pentode

Other

  • Heater voltage

    4.7 V

  • Heater current

    600 mA

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Triode typical plate voltage

    125 V

  • Heater-cathode voltage maximum

    200 V

Characteristics

  • Triode transconductance

    8500 uS

  • Triode amplification factor

    40

  • Triode plate resistance

    5000 ohm

  • Heater warm-up time

    11 s

Application

  • Application

    Oscillator / phase inverter / vertical oscillator

Capacitance

  • Triode grid-to-plate capacitance

    1.7 pF

SECTION 2

Pentode

Other

  • Pentode/tetrode typical plate voltage

    125 V

  • Pentode/tetrode grid2 voltage

    125 V

Characteristics

  • Pentode/tetrode transconductance

    6400 uS

  • Pentode/tetrode plate resistance

    200000 ohm

Application

  • Application

    Mixer / IF / video / general-purpose amplifier

Capacitance

  • Pentode grid1-to-plate capacitance maximum

    0.01 pF

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

  • Heater/filament voltage

    4.7 V

    Published rating

  • Heater/filament current

    600 mA

    Published rating

  • Pentode transconductance

    6400 µS

    PentodeSection

  • Pentode plate resistance

    200000 ohm

    PentodeSection

  • Triode transconductance

    8500 µS

    TriodeSection

  • Triode amplification factor

    40

    TriodeSection

  • Triode plate resistance

    5000 ohm

    TriodeSection

Other

  • Application

    Television amplifier/oscillator service

    TelevisionService

  • Electrical equivalence

    6EA8 except heater ratings

    Published statement

  • Pentode plate voltage

    225 V

    PentodeSection

  • Pentode screen voltage

    125 V

    PentodeSection

  • Pentode grid voltage

    -1 V

    PentodeSection

  • Pentode plate current

    12 mA

    PentodeSection

  • Pentode screen current

    4 mA

    PentodeSection

  • Triode plate voltage

    150 V

    TriodeSection

  • Triode plate current

    18 mA

    TriodeSection

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Warmup Time

    11 s

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    150 V

    Triode;ClassA

  • Plate current

    18 mA

    Triode;ClassA

  • Maximum plate voltage

    330 V

    Triode

  • Maximum plate dissipation

    2.5 W

    Triode

  • Heater/filament voltage

    4.7 V

    DerivativeSheet

  • Heater/filament current

    600 mA

    DerivativeSheet

  • Heater warm-up time

    11 s

    ControlledWarmup

Characteristic

  • Plate resistance

    5000 ohm

    Triode

  • Transconductance

    8500 uS

    Triode

  • Amplification factor

    42

    Triode

SECTION 2

Pentode

Other

  • Plate voltage

    125 V

    Pentode;ClassA

  • Screen voltage

    125 V

    Pentode;ClassA

  • Grid voltage

    -1 V

    Pentode;ClassA

  • Plate current

    12 mA

    Pentode;ClassA

  • Screen current

    4 mA

    Pentode;ClassA

  • Maximum plate voltage

    330 V

    Pentode

  • Maximum screen voltage

    330 V

    Pentode

  • Maximum plate dissipation

    3.1 W

    Pentode

  • Maximum screen dissipation

    0.55 W

    Pentode

Characteristic

  • Plate resistance

    200000 ohm

    Pentode

  • Transconductance

    6400 uS

    Pentode

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid to Plate

    1.7 pF

    Section1

  • Grid to Cathode/Heater/Pentode Cathode/Pentode Grid No.3/Internal Shield

    3 pF

    Section1

  • Plate to Cathode/Heater/Pentode Cathode/Pentode Grid No.3/Internal Shield

    1.4 pF

    Section1

Characteristic

  • Plate Supply Voltage

    150 V

    ClassA

SECTION 2

Pentode

Capacitance

  • Grid No.1 to Plate

    0.02 pF

    Section2

  • Grid No.1 to Cathode/Heater/Grid No.2/Grid No.3/Internal Shield

    5 pF

    Section2

  • Plate to Cathode/Heater/Grid No.2/Grid No.3

    2.6 pF

    Section2

Characteristic

  • Grid-No.2 Voltage

    125 V

    ClassA

  • Grid-No.1 Voltage

    -1 V

    ClassA

  • Plate Current

    12 mA

    ClassA

  • Grid-No.2 Current

    4 mA

    ClassA