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Voltage Dual Triode Pentode ·Pentode-Triode-Triode

14BR11

Television Duodecar combining a video-amplifier pentode, a sync-separator triode, and a general-purpose high-mu triode for integrated picture-signal processing.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
12GL
Socket code
B12C
Base pins
12
Nominal heater
14.2 V / 450 mA

Description

Duodecar type used in television receiver applications. K GjT2(T The high-mu triode unit No. 1 is used for general- purpose use, the medium-mu triode unit No. 2 for sync separator service, and the pentode unit for video G2 '*n2. amplifier service. Outlines section, 8C; requires duo- decar 12-contact socket.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12GL
Socket code
B12C
Base pins
12
Nominal heater voltage
14.2 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12GL - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
45000 Ω
Transconductance
0.0104 S
Amplification factor
68
Max plate voltage
330 V
Max screen voltage
330 V
Max plate dissipation
4 W
Max screen dissipation
1.1 W

Sharp-cutoff video-amplifier pentode.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9400 Ω
Transconductance
0.0044 S
Amplification factor
41
Max plate voltage
330 V
Max plate dissipation
2 W

Triode Section 1.

Section 3

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
12400 Ω
Transconductance
0.0055 S
Amplification factor
68
Max plate voltage
330 V
Max plate dissipation
1.5 W

Triode Section 2.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate Resistance

    45000 ohm

  • Transconductance

    10400 µS

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Screen Voltage

    330 V

  • Maximum Plate Dissipation

    4 W

  • Maximum Screen Dissipation

    1.1 W

  • Plate Voltage

    135 V

    Pentode

  • Screen Voltage

    135 V

    Pentode

  • Plate Current

    17 mA

    Pentode

  • Screen Current

    4 mA

    Pentode

SECTION 2

Triode

Characteristic

  • Plate Resistance

    12400 ohm

  • Transconductance

    5500 µS

  • Amplification Factor

    68

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Plate Dissipation

    1.5 W

  • Plate Voltage

    200 V

    Triode Section1

  • Plate Current

    7 mA

    Triode Section1

SECTION 3

Triode

Characteristic

  • Plate Resistance

    9400 ohm

  • Transconductance

    4400 µS

  • Amplification Factor

    41

Other

  • Maximum Plate Voltage

    330 V

  • Maximum Plate Dissipation

    2 W

  • Plate Voltage

    200 V

    Triode Section2

  • Plate Current

    9.2 mA

    Triode Section2

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    135 V

    AverageCharacteristics

  • Screen Voltage

    135 V

    AverageCharacteristics

Characteristic

  • Plate Current

    17 mA

    AverageCharacteristics

  • Screen Current

    4 mA

    AverageCharacteristics

SECTION 2

Triode

Other

  • Plate Voltage

    200 V

    AverageCharacteristics

Characteristic

  • Plate Current

    9.2 mA

    AverageCharacteristics

SECTION 3

Triode

Other

  • Plate Voltage

    200 V

    AverageCharacteristics

Characteristic

  • Plate Current

    7 mA

    AverageCharacteristics

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

  • amperes,

    11 amperes

    Published value from supplied target entry

Characteristic

  • Grid-No

    330 volts

    Published value from supplied target entry

  • Grid-No

    300

    Published value from supplied target entry

  • Plate Dissipation

    5 watts

    Published value from supplied target entry

  • Grid-No

    2

    Published value from supplied target entry

  • For grid-No

    1.1 volts

    Published value from supplied target entry

  • For grid-No

    330

    Published value from supplied target entry

  • Plate Voltage

    135 volts

    Published value from supplied target entry

  • Amplification Factor

    41

    Published value from supplied target entry

  • Plate-Resistance (Approx.)

    45000 ohms

    Published value from supplied target entry

  • Transconductance

    10400

    Published value from supplied target entry

  • Plate Current

    17 mA

    Published value from supplied target entry

  • Grid-No

    4 mA

    Published value from supplied target entry

  • Grid-No

    1

    Published value from supplied target entry