6SG7GT

Semi-remote-cutoff RF pentode with a 6.3 V, 0.3 A heater. Manufacturer handbook data document controlled-gain high-frequency amplification and representative operating conditions for receiver service.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

6SG7GT is listed in the supplied receiving-tube handbook as a semi-remote-cutoff RF pentode. The published heater rating is 6.3 V at 0.3 A. Maximum ratings and representative operating characteristics were transcribed from the supplied table.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8BK
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

8BK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1SH	A	SH — Internal Shield EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN2H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN3G3	A	G3 — Suppressor GridGroup 8BK3 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN3K	A	K — CathodeGroup 8BK3 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN4G1	A	G1 — Control Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN5G3	A	G3 — Suppressor GridGroup 8BK5 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN5K	A	K — CathodeGroup 8BK5 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN6G2	A	G2 — Screen Grid EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN7H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK
PIN8P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8BK

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 900000 Ω
Transconductance: 0.0047 S
Max plate voltage: 300 V
Max screen voltage: 150 V

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
125 V
ClassA OperatingPoint1
Control-grid bias
1 V
ClassA OperatingPoint1
Plate current
11.8 mA
ClassA OperatingPoint1
Screen current
4.4 mA
ClassA OperatingPoint1
Plate voltage
100 V
ClassA OperatingPoint2
Screen voltage
100 V
ClassA OperatingPoint2
Control-grid bias
1 V
ClassA OperatingPoint2
Plate current
8.2 mA
ClassA OperatingPoint2
Screen current
3.2 mA
ClassA OperatingPoint2

Characteristic

Plate resistance
900000 ohm
ClassA OperatingPoint1
Transconductance
4700 µS
ClassA OperatingPoint1
Plate resistance
250000 ohm
ClassA OperatingPoint2
Transconductance
4100 µS
ClassA OperatingPoint2
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating