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6G6GT

GT-envelope low-current power-amplifier pentode with documented pentode- and triode-connected operation. Designed for audio output where modest power and relatively low current consumption are useful.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7S
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 150 mA

Description

GT-envelope low-current power-amplifier pentode with pentode- and triode-connected data. Published maximum ratings, characteristics, and representative operating conditions were extracted from the approved source page where available.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7S
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7S - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IS	A	IS — Internal Screen EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN2H	—	H — Heater EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN3P	A	P — Plate (Anode) EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN4G2	A	G2 — Screen Grid EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN5G1	A	G1 — Control Grid EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN7H	—	H — Heater EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN8G3	A	G3 — Suppressor GridGroup 7S8 EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S
PIN8K	A	K — CathodeGroup 7S8 EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7S

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 175000 Ω
Transconductance: 0.0023 S
Max plate voltage: 300 V
Max screen voltage: 300 V

GT-envelope low-current power-amplifier pentode with pentode- and triode-connected data.

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

Plate voltage
180 V
ClassA; PentodeConnection
Screen voltage
180 V
ClassA; PentodeConnection
Control-grid bias magnitude
9 V
ClassA; PentodeConnection
Plate current
15 mA
ClassA; PentodeConnection
Screen current
2.5 mA
ClassA; PentodeConnection
Plate resistance
175000 ohm
ClassA; PentodeConnection
Transconductance
2300 uS
ClassA; PentodeConnection
Load resistance
10000 ohm
ClassA; PentodeConnection
Power output
1.1 W
ClassA; PentodeConnection
Plate voltage
180 V
ClassA; TriodeConnection; ScreenTiedToPlate
Control-grid bias magnitude
12 V
ClassA; TriodeConnection; ScreenTiedToPlate
Plate current
11 mA
ClassA; TriodeConnection; ScreenTiedToPlate
Plate resistance
4750 ohm
ClassA; TriodeConnection; ScreenTiedToPlate
Transconductance
2000 uS
ClassA; TriodeConnection; ScreenTiedToPlate
Amplification factor
9.5
ClassA; TriodeConnection; ScreenTiedToPlate
Load resistance
12000 ohm
ClassA; TriodeConnection; ScreenTiedToPlate
Power output
0.25 W
ClassA; TriodeConnection; ScreenTiedToPlate