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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6SH7GT

GT-envelope sharp-cutoff pentode for high-gain RF and IF voltage amplification with low interelectrode capacitance.

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

Description

Sharp-cutoff pentode voltage amplifier with high transconductance and low interelectrode capacitance.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8BK
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

8BK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1SHASH — Internal Shield

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN2H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN3G3AG3 — Suppressor GridGroup 8BK3

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN3KAK — CathodeGroup 8BK3

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN4G1AG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN5G3AG3 — Suppressor GridGroup 8BK5

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN5KAK — CathodeGroup 8BK5

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN6G2AG2 — Screen Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN7H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

PIN8PAP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8BK

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
350000 Ω
Transconductance
0.004 S
Max plate voltage
300 V
Max screen voltage
150 V
Max plate dissipation
3 W
Max screen dissipation
0.7 W

Published promoted fields populated from printed headings; identical repeated sections compressed.

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

    150 V

    ClassA OperatingPoint1

  • Control-grid bias

    1 V

    ClassA OperatingPoint1

  • Plate current

    10.8 mA

    ClassA OperatingPoint1

  • Screen current

    4.1 mA

    ClassA OperatingPoint1

Characteristic

  • Plate resistance

    900000 ohm

    ClassA OperatingPoint1

  • Transconductance

    4900 µS

    ClassA OperatingPoint1

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate Resistance

    900000 ohm

    AlternateOperatingPoint

  • Transconductance

    4900 uS

    AlternateOperatingPoint