Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage - Triple Triode ·Triode-Triode-Triode

6MJ8

Duodecar triple triode used in matrixing-amplifier circuits of color and black-and-white television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
12HG
Socket code
B12C
Base pins
12
Nominal heater
6.3 V / 900 mA

Description

Duodecar type used in matrixing-amplifier circuits of color and black-and-white television receivers. Outlines section, 8D; requires duodecar 12-contact socket. 12HG

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12HG
Socket code
B12C
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
900 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12HG - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

3 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
5600 Ω
Transconductance
0.003 S
Amplification factor
17
Max plate voltage
330 V
Max plate dissipation
3 W

Representative specification for all three identical triode sections; values semantically read from current OCR PDF.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
5600 Ω
Transconductance
0.003 S
Amplification factor
10
Max plate voltage
250 V
Max plate dissipation
3 W

Full supplied entry reviewed for ratings, characteristics, operating data, and capacitances.

Section 3

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
5600 Ω
Transconductance
0.003 S
Amplification factor
10
Max plate voltage
250 V
Max plate dissipation
3 W

Full supplied entry reviewed for ratings, characteristics, operating data, and capacitances.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Plate Dissipation

    3 W

  • Typical Plate Voltage

    250 V

    ClassA

  • TypicalGridVoltage

    -10.5 V

    ClassA

  • Typical Plate Current

    10 mA

    ClassA

Characteristic

  • Amplification Factor

    17

  • Plate Resistance

    5600 ohm

  • Transconductance

    3000 uS

Capacitance

  • Grid To Plate Capacitance

    2.8 pF

    Section1

  • Input Capacitance

    2.9 pF

    Section1

  • Output Capacitance

    0.36 pF

    Section1

  • Grid To Plate Capacitance

    2.8 pF

    Section2

  • Input Capacitance

    2.9 pF

    Section2

  • Output Capacitance

    0.6 pF

    Section2

  • Grid To Plate Capacitance

    2.8 pF

    Section3

  • Input Capacitance

    3 pF

    Section3

  • Output Capacitance

    0.7 pF

    Section3

Data set 02

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater Voltage (ac or dc)

    6.3 V

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

  • Heater Current

    0.9

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

  • Grid to plate — published value 1

    2.8 pF

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

  • Grid to plate — published value 2

    2.8 pF

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

  • Grid to plate — published value 3

    2.8 pF

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

  • Amplification Factor

    17 A

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

  • Plate Resistance (Approx.)

    5600

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

  • Transconductance

    3000

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

  • Plate Current

    10 mA

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

  • Plate Current for grid volts = -14 — published value 1

    -14 V

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

  • Plate Current for grid volts = -14 — published value 2

    4 V

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

  • Heater Voltage

    6.3 V

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

  • Plate Voltage

    250 V

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

  • Grid Voltage

    -10.5 V

    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.

  • Positive-bias value

    0

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

  • Plate Dissipation

    3

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

  • Heater Voltage, ac or do — published value 1

    5.7 V

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

  • Heater Voltage, ac or do — published value 2

    6.9 V

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

  • For fixed-bias operation

    1

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

  • current issue of EIA Standard RS-191

    191

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

  • As defined in the current issue of EIA Standard RS-239

    239

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

  • Pin 1 -Heater

    1

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

  • Pin 2 -Plate of Unit No.3

    2

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

  • Pin 3 -Cathode

    3

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

  • Pin 4 -Plate of Unit No.2

    4

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

  • Pin 6 -Plate of Unit No.l

    6

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

  • Pin 8 -Grid of Unit No.l

    8

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

  • Pin 10 -Grid of Unit No.2

    10

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

  • Pin 11 -Grid of Unit No.3

    11

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

  • Pin 12 -Heater

    12

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

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage

    6.3 volts

    Published value from supplied target entry

  • Heater Current

    0.9 ampere

    Published value from supplied target entry

  • Plate Voltage

    330

    Published value from supplied target entry

  • Grid Voltage, Positive-bias value

    0 volts

    Published value from supplied target entry

  • Plate Dissipation

    3 watts

    Published value from supplied target entry

  • Plate Voltage

    250 volts

    Published value from supplied target entry

  • Grid Voltage —

    10.5 volts

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    5600 ohms

    Published value from supplied target entry

  • Transconductance

    3000 umhos

    Published value from supplied target entry

  • Plate Current for grid voltage of

    14 volts

    Published value from supplied target entry

  • Grid Voltage for plate current of

    234 volts

    Published value from supplied target entry

  • Grid-Circuit Resistance, for fixed-bias operation

    1 megohm

    Published value from supplied target entry

  • Heater Current

    0.3 ampere

    Published value from supplied target entry

  • Plate Voltage (Each Unit)

    300 volts

    Published value from supplied target entry

  • Grid-No

    3

    Published value from supplied target entry

Capacitance

  • Direct Interelectrode Capacitances : No.l No

    3

    Published value from supplied target entry

  • Grid to Plate

    2.8 pF

    Published value from supplied target entry

  • Grid to Cathode and Heater

    3 pF

    Published value from supplied target entry

  • Plate to Cathode and Heater

    0.7 pF

    Published value from supplied target entry