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Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode

6AQ7GT

Receiving tube combining radio signal detection or control-voltage rectification with associated voltage amplification. Its detector function is integral to receiver signal processing and supports classification within the radio detector/converter family.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
8CK
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 300 mA

Description

Duplex-diode high-mu triode with separate cathodes, designed as a combined FM detector and audio amplifier.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8CK
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

8CK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN11P2AP — Plate (Anode)

Original EIA label 1P2; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8CK

PIN21KAK — Cathode

Original EIA label 1K; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8CK

PIN41P1AP — Plate (Anode)

Original EIA label 1P1; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8CK

PIN52GBOTHER — Other Identified Element

Ambiguous 2G in source; canonical OTHER (40) pending identification

Unverified

EIA Base Connections, printed page 129, 8CK

PIN62KBK — Cathode

Original EIA label 2K; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8CK

PIN7H—H — Heater

Original EIA label H; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8CK

PIN8H—H — Heater

Original EIA label H; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 8CK

Section ratings

3 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted from published ratings/characteristics; identical repeated sections compressed where applicable.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted from published ratings/characteristics; identical repeated sections compressed where applicable.

Section 3

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
44000 Ω
Transconductance
0.0016 S
Amplification factor
70
Max plate voltage
250 V
Max plate dissipation
1 W
Rectifier max heater-cathode voltage
90 V

Promoted from published ratings/characteristics; identical repeated sections compressed where applicable.

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 2

Diode

Other

  • Plate voltage

    250 V

    ClassA

  • Control-grid voltage

    -2 V

    ClassA

  • Plate current

    2.3 mA

    ClassA

Characteristic

  • Plate resistance

    44000 Ω

    ClassA

  • Transconductance

    1600 µS

    ClassA

  • Amplification factor

    70

    ClassA

SECTION 3

Triode

Other

  • Plate voltage

    250 V

    ClassA

  • Control-grid voltage

    -2 V

    ClassA

  • Plate current

    2.3 mA

    ClassA

Characteristic

  • Plate resistance

    44000 Ω

    ClassA

  • Transconductance

    1600 µS

    ClassA

  • Amplification factor

    70

    ClassA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • DiodeOperatingCurrentPerPlate

    0.9 mA

SECTION 3

Triode

Other

  • Plate Voltage

    250 V

    ClassA

Characteristic

  • Plate Current

    2.3 mA

    ClassA

Data set 03

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Continuous Diode Current

    0.9 mA

    EachDiode