6SK7GT

GT-envelope remote-cutoff pentode intended for RF and IF amplifier service. It retains the variable-mu controlled-gain function of the 6SK7 family in a tubular glass construction.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8N
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 300 mA

Description

The 6SK7GT is a Pentode intended for remote-cutoff RF/IF amplifier service. Published ratings, characteristics and typical operating data from the supplied datasheet were captured.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8N
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8N - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1SH	A	SH — Internal Shield EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN2H	—	H — Heater EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN3G3	A	G3 — Suppressor Grid EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN4G1	A	G1 — Control Grid EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN5K	A	K — Cathode EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN6G2	A	G2 — Screen Grid EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN7H	—	H — Heater EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N
PIN8P	A	P — Plate (Anode) EIA transcription; independent manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8N

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 800000 Ω
Transconductance: 0.002 S
Max plate voltage: 300 V
Max screen voltage: 150 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.8 W

Published maximum ratings and representative operating characteristics reviewed.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
150 V
Published handbook rating
Plate voltage
250 V
ClassA OperatingPoint1
Screen voltage
100 V
ClassA OperatingPoint1
Control-grid bias
3 V
ClassA OperatingPoint1
Plate current
9.2 mA
ClassA OperatingPoint1
Screen current
2.6 mA
ClassA OperatingPoint1
Plate voltage
100 V
ClassA OperatingPoint2
Screen voltage
100 V
ClassA OperatingPoint2
Control-grid bias
1 V
ClassA OperatingPoint2
Plate current
13 mA
ClassA OperatingPoint2
Screen current
4 mA
ClassA OperatingPoint2

Characteristic

Plate resistance
800000 ohm
ClassA OperatingPoint1
Transconductance
2000 µS
ClassA OperatingPoint1
Plate resistance
120000 ohm
ClassA OperatingPoint2
Transconductance
2350 µS
ClassA OperatingPoint2
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating

Data set 02

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Plate Voltage
250 V
Screen Voltage
100 V
Plate Current
9.2 mA
Screen Current
2.6 mA
Transconductance
2000 uS
Plate Resistance
800000 ohm

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA

Characteristic

Transconductance
2000 uS
ClassA
Plate resistance
800000 ohm
ClassA
Plate_current
9.2 mA
ClassA
Screen_current
2.5 mA
ClassA

Capacitance

Input capacitance
6.5 pF
Section1
Output capacitance
7.5 pF
Section1