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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6DK6

Sharp-cutoff miniature wideband pentode developed particularly for fixed-gain television IF amplifier stages.

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

Description

The 6DK6 is a 7-pin miniature sharp-cutoff pentode designed as a wide-band high-frequency amplifier, particularly for television IF stages.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7CM
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

7CM - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN2KAK — Cathode

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN3H—H — Heater

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN4H—H — Heater

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN5PAP — Plate (Anode)

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN6G2AG2 — Screen Grid

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN7G3AG3 — Suppressor GridGroup 7CM7

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

PIN7ISAIS — Internal ScreenGroup 7CM7

EIA chart transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CM

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
350000 Ω
Transconductance
0.0098 S
Max plate voltage
300 V
Max screen voltage
150 V
Max plate dissipation
2.3 W
Max screen dissipation
0.5 W
Max cathode current
20 mA

Published promoted values applied where applicable; additional ratings 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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    125 V

    Published operating/characteristic table

  • Screen Voltage

    2 V

    Published operating/characteristic table

  • Grid Voltage

    -6.5 V

    Published operating/characteristic table

Characteristic

  • Plate Current

    12 mA

    Published operating/characteristic table

  • Screen Current

    3.8 mA

    Published operating/characteristic table

  • Transconductance

    9800 uS

    Published operating/characteristic table

  • Plate Resistance

    0.35 ohm

    Published operating/characteristic table

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    125 V

  • Screen-grid voltage

    125 V

  • Cathode bias resistor

    56 Ohm

  • Plate current

    12 mA

  • Screen-grid current

    3.8 mA

Characteristics

  • Plate resistance

    350000 Ohm

  • Transconductance

    9800 uS

  • Control-grid cutoff voltage

    -6.5 V

Capacitance

  • Grid-to-plate capacitance

    0.025 pF

    Unshielded

Data set 03

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Typical plate voltage

    150 V

  • Typical screen voltage

    125 V

Characteristics

  • Transconductance

    12000 uS

Capacitance

  • Grid1-to-plate capacitance maximum

    0.015 pF

  • Input capacitance

    5.5 pF

  • Output capacitance

    2.5 pF

Application

  • Application

    Wideband television IF amplifier

Data set 04

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Grid-to-plate capacitance

    0.025 pF

  • Input capacitance

    6.3 pF

  • Output capacitance

    1.9 pF

Other

  • Plate voltage

    125 V

    ClassA1

  • Screen voltage

    125 V

    ClassA1

  • Plate current

    12 mA

    ClassA1

  • Screen current

    3.6 mA

    ClassA1

Data set 05

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

    125 V

    ClassA

  • Typical Screen Voltage

    125 V

    ClassA

Characteristic

  • Transconductance

    9800 uS

Data set 06

1971 RCA HB3 Binder 4 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.

  • heater

    6.3

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

  • shield, grid No.2, and heater

    1.9

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

  • Plate-Supply Voltage

    125 V

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

  • Grid-No 3

    3

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

  • Grid-No.2-Supply Voltage

    125 V

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

  • Cathode Resistor

    56 ohm

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

  • Plate Resistance (Approx.)

    0.35 Mohm

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

  • Transconductance

    9800

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

  • Plate Current

    12 mA

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

  • Grid-No.2 Current

    3.8 mA

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

  • plate µa = 20 — published value 1

    20 V

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

  • plate µa = 20 — published value 2

    -6.5 V

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

  • Pin 1 -Grid No.l — published value 1

    1

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

  • Pin 1 -Grid No.l — published value 2

    6

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

  • Pin 2 -Cathode — published value 1

    2

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

  • Pin 2 -Cathode — published value 2

    7

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

  • Pin 3 -Heater

    3

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

  • Pin 4 -Heater

    4

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

  • Pin 5 -Plate

    5

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

  • 165 and 330 volts — published value 1

    165 V

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

  • 165 and 330 volts — published value 2

    330 V

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

  • GRID-N°2 VOLTS=125 — published value 1

    2 V

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

  • GRID-N°2 VOLTS=125 — published value 2

    125 V

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

  • PLATE VOLTS=125

    125 V

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

  • GRID N~3 CONNECTED TO

    3

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

  • CATHODE AT SOCKET. tttttt/tttt///1t///\/////////

    1

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

  • GRID-NQ2 VOLTS=125

    125 V

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

Other

  • Grid No.l to plate

    0.02 mA

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

  • PLATE VOLTAGE

    330 V

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

  • GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE

    0 V

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

  • GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE

    33 V

    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.

  • PLATE DISSIPATION

    2.3 W

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

  • respect to cathode

    200 V

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

  • respect to cathode

    200 V

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

  • For fixed-bias operation

    0.25 mA

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

  • For cathode-bias operation

    1 mA

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

Data set 07

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Current

    15 mA

    Published in approved 12DK6 target entry; Section1

  • Equivalent Noise Resistance

    300 Ω

    Published in approved 12DK6 target entry; Section1

  • Grid-Circuit Resistance

    1 MΩ

    Published in approved 12DK6 target entry; Section1

  • Heater to Cathode Circuit Resistance

    0.02 MΩ

    Published in approved 12DK6 target entry; Section1

  • Plate Voltage

    330 V

    Published in approved 12DK6 target entry; Section1

  • Grid-No.3 (Suppressor-Grid) Voltage, Positive value

    0 V

    Published in approved 12DK6 target entry; Section1

  • Grid-No.2 (Screen-Grid) Supply Voltage

    330 V

    Published in approved 12DK6 target entry; Section1

  • Grid-No.l (Control-Grid) Voltage, Positive-bias value

    0 V

    Published in approved 12DK6 target entry; Section1

  • Plate Dissipation

    2.3 W

    Published in approved 12DK6 target entry; Section1

  • For grid-No.2 voltages up to

    165 V

    Published in approved 12DK6 target entry; Section1

  • For grid-No.2 voltages up to 165 volts

    0.55 W

    Published in approved 12DK6 target entry; Section1

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved 12DK6 target entry; Section1

Capacitance

  • Internal Shield

    6.3 pF

    Published in approved 12DK6 target entry; Section1

  • Internal Shield

    1.9 pF

    Published in approved 12DK6 target entry; Section1

Characteristic

  • Grid-No.! Voltagre (Approx.) for plate current of 20 fiA

    -6.5 V

    Published in approved 12DK6 target entry; Section1