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Voltage - Dual Triode (similar) ·Triode-Triode

5691

Premium industrial high-mu twin triode derived from the 6SL7GT family, designed for dependable long-life amplifier and control service where stable characteristics are important.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8BO
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 600 mA

Description

Premium high-mu twin triode based on the 6SL7GT for critical industrial service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8BO
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8BO - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
44000 Ω
Transconductance
0.0016 S
Amplification factor
70
Max plate voltage
275 V
Max plate dissipation
1 W
Max cathode current
10 mA

Representative electrical section for identical repeated sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
44000 Ω
Transconductance
0.0016 S
Amplification factor
70
Max plate voltage
275 V
Max plate dissipation
1 W
Max cathode current
10 mA

Second physical triode restored under current one-row-per-physical-section policy.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    600 mA

    Nominal

  • Maximum Plate Voltage

    275 V

  • Maximum Plate Dissipation

    1 W

  • Maximum Cathode Current

    10 mA

Characteristic

  • Transconductance

    1600 µS

    Typical

  • Amplification Factor

    70

    Typical

  • Plate Resistance

    44000 ohm

    Typical

Data set 02

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    600 mA

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    ClassA

  • Grid voltage

    -2 V

    ClassA

  • Plate current

    2.3 mA

    ClassA

Characteristic

  • Plate resistance

    44000 ohm

  • Transconductance

    1600 uS

  • Amplification factor

    70

Data set 04

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

CrossReference

  • Prototype / equivalent family

    6SL7GT

Data set 05

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    - to 275 V

  • Maximum plate dissipation

    - to 1 W

  • Maximum cathode current

    - to 10 mA

Characteristics

  • Plate resistance

    44000 Ω

  • Transconductance

    1600 µS

  • Amplification factor

    70

  • Plate voltage

    250 V

  • Grid voltage

    -2 V

  • Plate current

    2.3 mA

Capacitance

  • Grid to Plate

    3.1 to 4.1 pF

  • Grid to Cathode

    1.9 to 2.9 pF

  • Plate to Cathode

    1.8 to 2.8 pF

  • Grid to Cathode

    2.2 to 3.2 pF

  • Plate to Cathode

    2.1 to 3.1 pF