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Voltage Radio Detector Converter ·Pentode-Triode

19EA8

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

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9AE
Socket code: B9A
Base pins: 9
Nominal heater: 18.9 V / 150 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: 18.9 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9AE - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN12P	B	P — Plate (Anode) Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN21G1	A	G1 — Control Grid Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN31G2	A	G2 — 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
PIN61P	A	P — Plate (Anode) Chart transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN71G3	A	G3 — Suppressor GridGroup 9AE7 Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN7IS	A	IS — Internal ScreenGroup 9AE7 Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN71K	A	K — CathodeGroup 9AE7 Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN82K	B	K — Cathode Source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AE
PIN92G1	B	G1 — 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: 0.0085 S
Amplification factor: 40
Max plate voltage: 330 V
Max plate dissipation: 3 W
Max cathode current: 25 mA

6EA8 triode section.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 80000 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
Max cathode current: 25 mA

6EA8 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Voltage
150 V
TriodeSection

SECTION 2

Pentode

Other

Plate Voltage
125 V
PentodeSection
Heater Warmup Time
11 s

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
18.9 V
Heater current
150 mA
Typical plate voltage
150 V
OscillatorMixer
Typical plate current
18 mA
OscillatorMixer

Characteristic

Plate resistance
5000 ohm
Transconductance
8500 uS
Amplification factor
40

SECTION 2

Pentode

Other

Heater voltage
18.9 V
Heater current
150 mA
Typical plate voltage
125 V
OscillatorMixer
Typical screen-grid voltage
125 V
OscillatorMixer
Typical plate current
12 mA
OscillatorMixer
Typical screen-grid current
4 mA
OscillatorMixer

Characteristic

Plate resistance
80000 ohm
Transconductance
6400 uS

Data set 03

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage
330 V
WholeTube
Maximum plate dissipation
3 W
WholeTube
Plate voltage
150 V
TypicalOperation
Plate current
14 mA
TypicalOperation
Plate resistance
5000 ohm
TypicalOperation
Transconductance
8500 µS
TypicalOperation
Amplification factor
40
TypicalOperation

Characteristic

Triode grid-to-plate capacitance
1.7 pF
WholeTube

SECTION 2

Pentode

Other

Maximum plate voltage
330 V
WholeTube
Maximum screen supply voltage
330 V
WholeTube
Maximum plate dissipation
3.1 W
WholeTube
Maximum screen dissipation
0.55 W
WholeTube
Plate voltage
125 V
TypicalOperation
Screen voltage
125 V
TypicalOperation
Plate current
12 mA
TypicalOperation
Screen current
4 mA
TypicalOperation
Plate resistance
50000 ohm
TypicalOperation
Transconductance
11000 µS
TypicalOperation

Characteristic

Pentode grid 1-to-plate capacitance maximum
0.01 pF
WholeTube
Pentode input capacitance
7 pF
WholeTube
Pentode output capacitance
2.4 pF
WholeTube

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

AllowableHeaterCurrent
140 mA to 160 mA
Shared heater

Data set 05

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
18.9 V
Heater current
450 mA
Heater warm-up time
11 s
ControlledWarmup
Plate voltage
150 V
Triode;ClassA
Plate current
18 mA
Triode;ClassA
Maximum plate voltage
330 V
Triode

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
Plate current
12 mA
Pentode;ClassA
Screen current
4 mA
Pentode;ClassA
Maximum plate voltage
330 V
Pentode
Maximum screen voltage
330 V
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