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6JN8

Triode-pentode with a sharp-cutoff pentode intended for television horizontal-deflection oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9AE
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

The 6JN8 combines a medium-mu triode with a sharp-cutoff pentode; the pentode section is intended for horizontal-deflection oscillator service 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: 9AE
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 450 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 200000 Ω
Transconductance: 0.0075 S
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.55 W

Sharp-cutoff pentode horizontal-deflection oscillator section.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5400 Ω
Transconductance: 0.0085 S
Amplification factor: 46
Max plate voltage: 300 V
Max plate dissipation: 2.5 W

Medium-mu triode 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

Pentode

Other

Plate Voltage
125 V
Pentode typical operation
Screen Voltage
125 V
Pentode typical operation

Characteristic

Plate Current
12 mA
Pentode typical operation
Screen Current
4 mA
Pentode typical operation

SECTION 2

Triode

Other

Plate Voltage
125 V
Triode average characteristics

Characteristic

Plate Current
13.5 mA
Triode average characteristics

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
125 V
PentodeSection;HorizontalOscillator
Grid 2 voltage
125 V
PentodeSection;HorizontalOscillator
Grid 1 voltage
-1 V
PentodeSection;HorizontalOscillator
Plate current
12 mA
PentodeSection;HorizontalOscillator
Grid 2 current
4 mA
PentodeSection;HorizontalOscillator

SECTION 2

Triode

Other

Plate voltage
125 V
TriodeSection
Grid 1 voltage
-1 V
TriodeSection
Plate current
13.5 mA
TriodeSection

Characteristic

Heater warm-up time
11 s
WholeTube

Data set 03

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Input Capacitance
5.5 pF
Output Capacitance
3.4 pF
Input Capacitance
3.2 pF
Output Capacitance
2.2 pF

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Maximum Plate Voltage
300 V
Section2
Maximum Screen Voltage
300 V
Section2
Maximum Plate Dissipation
2.5 W
Section2
Maximum Screen Dissipation
0.55 W
Section2

Characteristic

Plate Resistance
200000 ohm
Section2
Transconductance
7500 uS
Section2

SECTION 2

Triode

Other

Peak value
200 V
Other;PublishedValue1
Peak value
0 V
Other;PublishedValue2
Average value
100 V
Other;PublishedValue1
Average value
100 V
Other;PublishedValue2
Plate Voltage
300 V
MaximumRating;PublishedValue1
Plate Voltage
300 V
MaximumRating;PublishedValue2
—
300 V
MaximumRating
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating;PublishedValue1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
MaximumRating;PublishedValue2
Plate Dissipation
2.5 W
MaximumRating;PublishedValue1
Plate Dissipation
2.5 W
MaximumRating;PublishedValue2
For grid-No.2 voltages up to 150 volts
0.55 V
MaximumRating
For fixed-bias operation
2.2 megohm
MaximumCircuitValue;PublishedValue1
For fixed-bias operation
2.2 megohm
MaximumCircuitValue;PublishedValue2
For cathode-bias operation
2.2 megohm
MaximumCircuitValue;PublishedValue1
For cathode-bias operation
2.2 megohm
MaximumCircuitValue;PublishedValue2
Maximum Plate Voltage
300 V
Section1
Maximum Plate Dissipation
2.5 W
Section1

Capacitance

Grid No.l to Plate
0.01 pF
Capacitance
Shield
5.5 pF
Capacitance
Shield
3.4 pF
Capacitance
Grid to Plate
1.7 pF
Capacitance
and Internal Shield
3.2 pF
Capacitance
and Internal Shield
2.2 pF
Capacitance

Characteristic

Plate Voltage
125 V
Characteristic;PublishedValue1
Plate Voltage
125 V
Characteristic;PublishedValue2
Grid-No.2 Voltage
125 V
Characteristic
Grid-No.l Voltage
-1 V
Characteristic;PublishedValue1
Grid-No.l Voltage
-1 V
Characteristic;PublishedValue2
Plate Resistance (Approx.)
5400 ohm
Characteristic;PublishedValue1
Plate Resistance (Approx.)
200000 ohm
Characteristic;PublishedValue2
Plate Current
13.5 mA
Characteristic;PublishedValue1
Plate Current
12 mA
Characteristic;PublishedValue2
Grid-No.2 Current
4 mA
Characteristic
10 /iA
-8 V
Characteristic
Plate Resistance
5400 ohm
Section1
Transconductance
8500 uS
Section1
Amplification Factor
46
Section1