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Power - TV Vertical Output ·Triode-Triode

6FJ7

Dual triode intended for television vertical-deflection service, combining oscillator/driver and power-output functions where applicable. Manufacturer data emphasize vertical-sweep operation, pulse-voltage capability, and the stronger section’s current and dissipation requirements.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B12C
Base pins
12
Nominal heater
6.3 V / 900 mA

Description

Dissimilar medium-mu dual triode with separate high-current sections. The supplied RCA datasheet was reviewed for heater data, maximum ratings, characteristics, typical operating conditions, capacitances, and application-specific electrical information.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
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

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9000 Ω
Transconductance
0.0025 S
Amplification factor
22.5
Max plate voltage
350 V
Max plate dissipation
1 W

Section 1, vertical oscillator service.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
2000 Ω
Transconductance
0.0077 S
Amplification factor
15.4
Max plate voltage
550 V
Max plate dissipation
10 W
Max cathode current
50 mA

Section 2, vertical-deflection amplifier service; 50 mA DC cathode-current maximum.

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

Characteristic

  • Plate Voltage

    250 V

    Oscillator

  • Plate Current

    8 mA

    Oscillator

SECTION 2

Triode

Characteristic

  • Plate Voltage

    250 V

    Amplifier

  • Plate Current

    41 mA

    Amplifier

Other

  • Peak Positive Pulse Plate Voltage

    2500 V

    VerticalDeflectionAmplifier

  • Peak Cathode Current

    150 mA

    VerticalDeflectionAmplifier

Data set 02

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    ClassA

  • Plate current

    8 mA

    ClassA

  • Maximum plate voltage

    350 V

  • respect to cathode

    200 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • respect to cathode

    200 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC PLATE VOLTAGE

    350 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PEAK NEGATIVE-PULSE GRID VOLTAGE

    400 V

    Pulse

  • PLATE DISSIPATION

    1 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • bias operation — published value 1

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • bias operation — published value 2

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC PLATE VOLTAGE

    550 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PEAK POSITIVE-PULSE PLATE VOLTAGEe

    2500 V

    Pulse

  • PEAK NEGATIVE-PULSE GRID VOLTAGE

    250 V

    Pulse

  • PLATE DISSIPATION

    10 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Characteristics

  • Plate resistance

    9000 ohm

    ClassA

  • Transconductance

    2500 uS

    ClassA

  • Amplification factor

    22.5

    ClassA

  • Voltage (AC or DC) — published value 1

    6.3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Voltage (AC or DC) — published value 2

    0.6 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current at heater volts = 6.3 — published value 1

    6.3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current at heater volts = 6.3 — published value 2

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current at heater volts = 6.3 — published value 3

    900 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to plate — published value 1

    3.8 pF

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to plate — published value 2

    5 pF

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to cathode and heater — published value 1

    2.2 pF

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid to cathode and heater — published value 2

    4 pF

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate to cathode and heater — published value 1

    0.48 pF

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate to cathode and heater — published value 2

    0.54 pF

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 1

    250 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 2

    150 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Voltage — published value 3

    250 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid Voltage — published value 1

    -8 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid Voltage — published value 2

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid Voltage — published value 3

    -9.5 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Resistance (Approx ) — published value 1

    9000 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Resistance (Approx ) — published value 2

    2000 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Transconductance — published value 1

    2500

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Transconductance — published value 2

    7700

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Current — published value 1

    8 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Current — published value 2

    68 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate Current — published value 3

    41 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • for plate µa = 10 — published value 1

    10 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • for plate µa = 10 — published value 2

    -18 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • for plate µa = 50 — published value 1

    50 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • for plate µa = 50 — published value 2

    -23 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -Heater — published value 1

    1

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -Heater — published value 2

    8

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -No Internal — published value 1

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -No Internal — published value 2

    9

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3 -Grid of Unit — published value 1

    3

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3 -Grid of Unit — published value 2

    10

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Same asPin2 — published value 1

    4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Same asPin2 — published value 2

    11

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 5 -Plate of

    5

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 7 -Cathode of

    7

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • For fixed-bias operation — published value 1

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • For fixed-bias operation — published value 2

    2 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

SECTION 2

Triode

Other

  • Plate voltage

    250 V

    ClassA

  • Plate current

    41 mA

    ClassA

  • Maximum plate voltage

    550 V

Characteristics

  • Plate resistance

    2000 ohm

    ClassA

  • Transconductance

    7700 uS

    ClassA

  • Amplification factor

    15.4

    ClassA

  • Unit No.2

    12

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.