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Power - Pentode (NOT beam) ·Pentode

6G6G

Power pentode designed for audio-frequency power-amplifier service. Its output-stage characteristics provide low-frequency load drive in radio and general audio equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7S
Socket code
B7G
Base pins
6
Nominal heater
6.3 V / 150 mA

Description

Power pentode for audio-frequency power-amplifier service.

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
6
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.

TerminalSectionConnectionEvidence
PIN1ISAIS — 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

PIN3PAP — Plate (Anode)

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7S

PIN4G2AG2 — Screen Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7S

PIN5G1AG1 — 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

PIN8G3AG3 — Suppressor GridGroup 7S8

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7S

PIN8KAK — 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
170000 Ω
Transconductance
0.0021 S
Max plate voltage
180 V
Max screen voltage
180 V

Source-defined physical/function section.

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

1937 Ken Rad

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Plate Voltage

    180 V

    Plate Voltage 135 180 Max. Volts

  • Screen Voltage

    180 V

    Screen Voltage 135 180 Max. Volts

  • Grid Voltage

    -9 V

    Grid Voltage -6.0° -9.0% Volts

  • Plate Resistance

    175000 ohm

    Plate Resistance 170,000 175,000 Ohms

  • Amplification Factor

    400 ratio

    Amplification Factor 360 400

  • Mutual Conductance

    2300 µS

    Mutual Conductance 2100 2300 Micromhos

  • Load Resistance

    10000 ohm

    Load Resistance 12,000 10,000 Ohms

  • Power Output

    1.1 W

    Power Output . 1.1 Watts

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum plate voltage

    180 V

    Published datasheet rating

  • Maximum screen voltage

    180 V

    Published datasheet rating

  • Plate voltage

    135 V

    ClassA

  • Screen voltage

    135 V

    ClassA

  • Screen current

    2 mA

    ClassA

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    150 mA

    Published heater rating

Data set 03

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

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    150 mA

  • Plate voltage

    180 V

    Typical operating conditions

  • Plate current

    1111.515 mA

    Typical operating conditions