Alternatives & variations Download PDF datasheet

6F6GT

GT-envelope power-amplifier pentode with documented push-pull Class-A ratings. Designed for receiver audio-output service in compact tubular-glass construction.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7S
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 700 mA

Description

GT-envelope power-amplifier pentode with push-pull Class-A ratings. Published maximum ratings, characteristics, and representative operating conditions were extracted from the approved source page where available.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7S
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 700 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: 80000 Ω
Transconductance: 0.0025 S
Max plate voltage: 375 V
Max screen voltage: 285 V
Max plate dissipation: 11 W
Max screen dissipation: 3.75 W

GT-envelope power-amplifier pentode with push-pull Class-A ratings.

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
315 V
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes
Screen voltage
285 V
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes
Control-grid bias magnitude
24 V
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes
Plate current
62 mA
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes
Screen current
12 mA
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes
Load resistance
10000 ohm
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes
Power output
11 W
ClassA; TwoTubes; PushPull; PlateAndScreenCurrentValuesForTwoTubes