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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6SJ7GT

GT-envelope sharp-cutoff pentode for high-gain RF amplification and anode-bend detector service. High plate resistance provides substantial voltage gain in receiver and general signal-amplifier circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
8N
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 300 mA

Description

The Ferranti 6SJ7GT is a rF pentode for high-gain amplifiers and anode-bend detector service.

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.

TerminalSectionConnectionEvidence
PIN1SHASH — 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

PIN3G3AG3 — Suppressor Grid

EIA transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8N

PIN4G1AG1 — Control Grid

EIA transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8N

PIN5KAK — Cathode

EIA transcription; independent manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8N

PIN6G2AG2 — 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

PIN8PAP — 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
1000000 Ω
Transconductance
0.00165 S
Max plate voltage
300 V
Max screen voltage
125 V
Max plate dissipation
2.5 W
Max screen dissipation
0.75 W

Published promoted values applied where applicable; additional ratings, characteristics, and operating data retained as parameters.

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

    3 mA

    ClassA OperatingPoint1

  • Screen current

    0.8 mA

    ClassA OperatingPoint1

  • Plate voltage

    100 V

    ClassA OperatingPoint2

  • Screen voltage

    100 V

    ClassA OperatingPoint2

  • Control-grid bias

    3 V

    ClassA OperatingPoint2

  • Plate current

    2.9 mA

    ClassA OperatingPoint2

  • Screen current

    0.9 mA

    ClassA OperatingPoint2

  • Triode-connected plate voltage

    250 V

    TriodeConnection ClassA

  • Triode-connected control-grid bias

    8.5 V

    TriodeConnection ClassA

  • Triode-connected plate current

    9.2 mA

    TriodeConnection ClassA

  • Triode-connected plate voltage

    180 V

    TriodeConnection ClassA

  • Triode-connected control-grid bias

    6 V

    TriodeConnection ClassA

  • Triode-connected plate current

    6 mA

    TriodeConnection ClassA

Characteristic

  • Plate resistance

    1000000 ohm

    ClassA OperatingPoint1

  • Transconductance

    1650 µS

    ClassA OperatingPoint1

  • Plate resistance

    700000 ohm

    ClassA OperatingPoint2

  • Transconductance

    1575 µS

    ClassA OperatingPoint2

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

  • Triode-connected plate resistance

    7600 ohm

    TriodeConnection

  • Triode-connected transconductance

    2500 µS

    TriodeConnection

  • Triode-connected amplification factor

    19

    TriodeConnection

  • Triode-connected plate resistance

    8200 ohm

    TriodeConnection

  • Triode-connected transconductance

    2300 µS

    TriodeConnection

  • Triode-connected amplification factor

    19

    TriodeConnection

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

    3 mA

  • Screen Current

    0.8 mA

  • Transconductance

    1650 uS

  • Plate Resistance

    1000000 ohm

Data set 03

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Voltage

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Current

    300 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.i to Plate — published value 1

    2.8

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.i to Plate — published value 2

    2.8

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to Cathode — published value 1

    3

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to Cathode — published value 2

    3.4

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate to Cathode — published value 1

    11

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate to Cathode — published value 2

    11

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • (6SJ7, Shell — published value 1

    6

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • (6SJ7, Shell — published value 2

    4

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 1 6SJ7-GT, — published value 1

    1

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 1 6SJ7-GT, — published value 2

    6

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 1 6SJ7-GT, — published value 3

    5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Base Sleeve

    6

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • ~"1 Pin 2 -Heater — published value 1

    1

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • ~"1 Pin 2 -Heater — published value 2

    2

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • ~"1 Pin 2 -Heater — published value 3

    7

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin3-Grid No.3

    8

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate voltage — published value 1

    100 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate voltage — published value 2

    250 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Voltage — published value 1

    100 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Voltage — published value 2

    100 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.l Voltage — published value 1

    -3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.l Voltage — published value 2

    -3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx.)

    0.7 Mohm

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance — published value 1

    1575

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance — published value 2

    1650

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • plate current of l0 µamp — published value 1

    -8 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • plate current of l0 µamp — published value 2

    -8 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current — published value 1

    2.9 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current — published value 2

    3 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Current — published value 1

    0.9 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Current — published value 2

    0.8 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Voltage — published value 1

    180 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Voltage — published value 2

    250 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.l Voltage — published value 1

    -6 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.l Voltage — published value 2

    -8.5 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx. ~ — published value 1

    8250 ohm

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx. ~ — published value 2

    7600 ohm

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance — published value 1

    2300

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance — published value 2

    2500

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current — published value 1

    6 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current — published value 2

    9.2 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-NII2 VOLTS - 100

    100 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • E f =6.3 VOLTS — published value 1

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • E f =6.3 VOLTS — published value 2

    300 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • E f =6.3 VOLTS — published value 3

    3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • CURVE

    2

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • =Eq=6.3 VOLTS — published value 1

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

Other

  • Grid No.l to Plate — published value 1

    0.005 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to Plate — published value 2

    0.005 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • 'PLATE VOLTAGE

    300 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-No.2 (SCREEN) VOLTAGE

    125 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRIC-No.2 SUPPLY VOLTAGE

    300 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE DISSIPATION

    2.5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-No.2 DISSIPATION

    0.1 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Positive bias value

    0 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • negative with respect to cathode

    90 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater positive with respect to cathode

    90 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.l-Circuit Resistance

    1 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE VOLTAGE

    250 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE DISSIPATION (Total)

    2.5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater negative with

    90 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater positive with respect to cathode

    90 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.