Alternatives & variations Download PDF datasheet

6GE8

Low-mu high-perveance triode plus sharp-cutoff pentode, particularly suited to voltage-regulator applications; the triode has about 7-watt plate dissipation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9LC
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 900 mA

Description

Low-mu high-perveance triode plus sharp-cutoff pentode, particularly suited to voltage-regulator applications.

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: 9LC
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 900 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9LC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 340000 Ω
Transconductance: 0.0032 S
Max plate voltage: 330 V
Max screen voltage: 275 V
Max plate dissipation: 1 W
Max screen dissipation: 0.5 W

Sharp-cutoff pentode section.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 1080 Ω
Transconductance: 0.005 S
Amplification factor: 5.4
Max plate voltage: 275 V
Max plate dissipation: 7 W
Max cathode current: 50 mA

Low-mu high-perveance triode section for regulator service.

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

Heater voltage
6.3 V
Heater current
900 mA
Plate voltage
150150 V
Typical operating conditions
Screen voltage
150 V
Typical operating conditions
Plate current
5.535 mA
Typical operating conditions

SECTION 2

Triode

Other

Heater voltage
6.3 V
Heater current
900 mA
Plate voltage
150150 V
Typical operating conditions
Screen voltage
150 V
Typical operating conditions
Plate current
5.535 mA
Typical operating conditions

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Plate resistance
340000 ohm
Transconductance
3200 uS

Other

Maximum plate voltage
330 V
Maximum plate dissipation
1 W
Maximum screen-grid dissipation
0.5 W
Heater voltage
6.3 V
Heater current
900 mA
Typical plate voltage
150 V
Typical screen-grid voltage
150 V
Typical plate current
5.5 mA

SECTION 2

Triode

Characteristic

Plate resistance
1080 ohm
Transconductance
5000 uS
Amplification factor
5.4

Other

Maximum plate voltage
275 V
Maximum plate dissipation
7 W
Maximum cathode current
50 mA
Heater voltage
6.3 V
Heater current
900 mA
Typical plate voltage
150 V
Typical plate current
35 mA

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Grid #1-to-plate capacitance
0.02 pF
Input capacitance
8 pF
Output capacitance
2.4 pF

Other

Plate voltage
150 V
AverageCharacteristics
Screen voltage
150 V
AverageCharacteristics
Grid #1 voltage
-2 V
AverageCharacteristics
Plate current
5.5 mA
AverageCharacteristics
Screen current
2.7 mA
AverageCharacteristics

SECTION 2

Triode

Capacitance

Grid-to-plate capacitance
7.5 pF
Input capacitance
5.5 pF
Output capacitance
1.3 pF

Other

Plate voltage
150 V
AverageCharacteristics
Grid voltage
-21 V
AverageCharacteristics
Plate current
35 mA
AverageCharacteristics

Characteristic

Zero-bias plate current
70 mA
Eb=50V