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Voltage Radio Detector Converter ·Pentode

6DT6

Dual-control sharp-cutoff pentode developed primarily for television FM detection. Two effective control grids also permit delay, gain-control, and mixer circuits, providing specialized signal-processing flexibility.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7EN
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

The 6DT6 is a sharp-cutoff pentode intended for television FM detector service; its two control grids also permit delay, gain-control, and mixer circuits.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7EN
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7EN - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN2ISAIS — Internal ScreenGroup 7EN2

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN2KAK — CathodeGroup 7EN2

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN3H—H — Heater

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN4H—H — Heater

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN5PAP — Plate (Anode)

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN6G2AG2 — Screen Grid

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

PIN7G3AG3 — Suppressor Grid

Chart transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EN

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.0008 S
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
1.5 W
Max screen dissipation
1 W

Grid-1 transconductance promoted; grid-3 transconductance retained as parameter.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    150 V

    ClassA

  • Screen-grid voltage

    100 V

    ClassA

  • Grid 3 voltage

    0 V

    ClassA

  • Cathode bias resistor

    560 Ohm

    ClassA

  • Plate current

    1.7 mA

    ClassA

  • Screen-grid current

    2.1 mA

    ClassA

Characteristics

  • Plate resistance

    150000 Ohm

    ClassA

  • Grid 1 transconductance

    800 uS

    ClassA

  • Grid 3 transconductance

    515 uS

    ClassA

  • Grid 1 cutoff voltage

    -4.5 V

  • Grid 3 cutoff voltage

    -3.5 V

Capacitance

  • Grid 1 to plate capacitance

    0.02 pF

    Shielded

  • Grid 3 to plate capacitance

    1.4 pF

    Shielded

  • Grid 1 input capacitance

    5.8 pF

    Shielded

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Grid2 supply voltage maximum

    300 V

  • Grid2 dissipation maximum

    1 W

  • Class-A grid2 voltage

    100 V

    ClassA

Characteristics

  • Plate resistance

    150000 ohm

    ClassA

  • Grid3 cutoff bias

    -3.5 V

Application

  • Application

    Limiter / FM detector / gating / mixer

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Grid 1 to plate capacitance

    0.02 pF

  • Grid 1 to grid 3 capacitance

    0.1 pF

  • Grid 3 to plate capacitance

    1.4 pF

Other

  • Plate supply voltage

    150 V

    ClassA1

  • Screen supply voltage

    100 V

    ClassA1

  • Plate current

    1.1 mA

    ClassA1

  • Screen current

    2.1 mA

    ClassA1

  • Grid 3 transconductance

    515 uS

    ClassA1

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

  • HeaterCurrentNominal

    300 mA

  • Typical Plate Voltage

    150 V

    ClassA

  • Typical Screen Voltage

    100 V

    ClassA

Characteristic

  • Plate Resistance

    150000 Ohm

  • Transconductance

    800 uS

  • Grid3 Transconductance

    515 uS

    Grid3Control