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

Power - TV Vertical Output ·Triode-Triode

6FM7

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
12EJ
Socket code
B12C
Base pins
12
Nominal heater
6.3 V / 1.05 A

Description

Dissimilar dual triode used as a combined vertical-deflection oscillator and vertical-deflection amplifier in color and black-and-white television receivers.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12EJ
Socket code
B12C
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
1.05 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12EJ - 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
30000 Ω
Transconductance
0.0022 S
Amplification factor
66
Max plate voltage
350 V
Max plate dissipation
1 W

Section 1, vertical oscillator service.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
920 Ω
Transconductance
0.006 S
Amplification factor
5.5
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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

  • Heater Current ... .. ittt iiiiiinecrenns 450 450 1005 Ma

    1005 mA

    Heater Current ... .. ittt iiiiiinecrenns 450 450 1005 Ma

  • Output: Pto (h 4 K) ittt i i it et et neiaannnnn 0.40 1.1 Pf

    1.1 Pf

    Output: Pto (h 4 K) ittt i i it et et neiaannnnn 0.40 1.1 Pf

  • Plate Voltage ... oo i e et e 250 175 Volts

    175 V

    Plate Voltage ... oo i e et e 250 175 Volts

  • Grid No. 1 Voltage .. i i. it ieeenn -3 -25 Volts

    -25 V

    Grid No. 1 Voltage .. i i. it ieeenn -3 -25 Volts

  • Plate Current ... ... i i i e e 2.0 40 Ma

    40 mA

    Plate Current ... ... i i i e e 2.0 40 Ma

  • Transconductance .........iiiiiiiiiiiirerninreianeeenns 2200 6000 umhos

    6000 umhos

    Transconductance .........iiiiiiiiiiiirerninreianeeenns 2200 6000 umhos

Other

  • Plate Voltage (MaX.) .i.iiiiiiiiiiieinneiirsrecscanssacsnss 350 550 Volts

    550 V

    Plate Voltage (MaX.) .i.iiiiiiiiiiieinneiirsrecscanssacsnss 350 550 Volts

  • Peak Positive Pulse Plate Voltage (Max.) ......cccevvunne. —_ 1500 Volts

    1500 V

    Peak Positive Pulse Plate Voltage (Max.) ......cccevvunne. —_ 1500 Volts

  • Peak Negative Puise Grid Voltage (Max.) ................. 400 250 Volts

    250 V

    Peak Negative Puise Grid Voltage (Max.) ................. 400 250 Volts

  • Plate Dissipation (Max.)®) ...t iiiiiiinrerrennnneanns 1.0 10 Watts

    10 W

    Plate Dissipation (Max.)®) ...t iiiiiiinrerrennnneanns 1.0 10 Watts

  • Average Cathode Current (Max.)......viiverinvenanenarnnns — 50 Ma

    50 mA

    Average Cathode Current (Max.)......viiverinvenanenarnnns — 50 Ma

  • Peak Cathode Current (Max.) .....cvviirivirncennnsannens — 175 Ma

    175 mA

    Peak Cathode Current (Max.) .....cvviirivirncennnsannens — 175 Ma

  • Grid Circuit Resistance, Self Bias (Max.) ......cccevvuuun. 2.2 2.2 Megohms

    2.2 Megohms

    Grid Circuit Resistance, Self Bias (Max.) ......cccevvuuun. 2.2 2.2 Megohms

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Plate Voltage

    250 V

    Oscillator

  • Plate Current

    20 mA

    Oscillator

SECTION 2

Triode

Characteristic

  • Plate Voltage

    175 V

    Amplifier

  • Plate Current

    40 mA

    Amplifier

Other

  • Peak Positive Pulse Plate Voltage

    1500 V

    VerticalDeflectionAmplifier

  • Peak Cathode Current

    175 mA

    VerticalDeflectionAmplifier

Data set 03

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

    2 mA

    ClassA

  • Maximum plate voltage

    350 V

Characteristics

  • Plate resistance

    30000 ohm

    ClassA

  • Transconductance

    2200 uS

    ClassA

  • Voltage (AC or DC) — published value 1

    6 V

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

  • Voltage (AC or DC) — published value 2

    3 V

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

  • Voltage (AC or DC) — published value 3

    0.6 V

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

  • Current at 6.3 volts — published value 1

    6.3 V

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

  • Current at 6.3 volts — published value 2

    1.05 V

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

  • Grid to plate — published value 1

    4 pF

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

  • Grid to plate — published value 2

    7 pF

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

  • Input: G to (K, H) — published value 1

    2.4 pF

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

  • Input: G to (K, H) — published value 2

    7 pF

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

  • Output: P to (K, H) — published value 1

    0.4 pF

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

  • Output: P to (K, H) — published value 2

    1.1 pF

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

  • Pin 1 -Heater

    1

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

  • Pin 9 -Cathode of Unit No.1

    9

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

  • Pin 10 -Grid of Unit No.1

    10

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

  • Pin 11 - Plate of Unit No.l

    11

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

  • Pin 12 -Heater

    12

    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

    60 V

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

  • Plate Voltage — published value 3

    175 V

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

  • Grid Voltage — published value 1

    -3 V

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

  • Grid Voltage — published value 2

    -25 V

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

  • Plate Resistance (Approx.) — published value 1

    30000 ohm

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

  • Plate Resistance (Approx.) — published value 2

    920 ohm

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

  • Transconductance — published value 1

    2200

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

  • Transconductance — published value 2

    6000

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

  • Plate Current — published value 1

    2 mA

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

  • Plate Current — published value 2

    95 mA

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

  • Plate Current — published value 3

    40 mA

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

  • DC Plate Voltage — published value 1

    350 V

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

  • DC Plate Voltage — published value 2

    550 V

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

  • Voltage

    1500 V

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

  • Voltage — published value 1

    400 V

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

  • Voltage — published value 2

    250 V

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

  • Plate Dissipation — published value 1

    1 W

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

  • Plate Dissipation — published value 2

    10 W

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

  • For fixed-bias operation — published value 1

    1 Mohm

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

  • For fixed-bias operation — published value 2

    1 Mohm

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

  • For cathode-bias operation — published value 1

    2.2 Mohm

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

  • For cathode-bias operation — published value 2

    2.2 Mohm

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

SECTION 2

Triode

Other

  • Plate voltage

    175 V

    ClassA

  • Plate current

    40 mA

    ClassA

  • Maximum plate voltage

    550 V

Characteristics

  • Plate resistance

    920 ohm

    ClassA

  • Transconductance

    6000 uS

    ClassA

  • Pin 3 -Grid of Unit No.2

    3

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

  • Pin 5- Plate of Unit No.2

    5

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

  • Pin 7 -Cathode of Unit No.2

    7

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

  • Pin 8 -Grid of Unit No.2

    8

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

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage (ac/dc) 6.3

    13 V

    Published in approved 6FM7 target entry; Section1

  • Heater Current 1.05

    450 mA

    Published in approved 6FM7 target entry; Section1

  • Heater Warm-up Time (Average)

    11 seconds

    Published in approved 6FM7 target entry; Section1

  • —

    45 V

    Published in approved 6FM7 target entry; Section1

  • DC Plate Voltage 350

    500 V

    Published in approved 6FM7 target entry; Section1

  • Peak Positive-Pulse Plate Voltage*

    1500 V

    Published in approved 6FM7 target entry; Section1

  • Peak Negative-Pulse Plate Voltage 400

    250 V

    Published in approved 6FM7 target entry; Section1

  • Average Cathode Current

    50 mA

    Published in approved 6FM7 target entry; Section1

  • Plate Dissipation! 1

    10 W

    Published in approved 6FM7 target entry; Section1

  • For fixed-bias operation 1

    1 MΩ

    Published in approved 6FM7 target entry; Section1

  • For cathode-bias operation 2.2

    2.2 MΩ

    Published in approved 6FM7 target entry; Section1

Characteristic

  • Plate Voltage 250

    175 V

    Published in approved 6FM7 target entry; Section1

  • Grid Voltage —3

    -25 V

    Published in approved 6FM7 target entry; Section1

  • Plate Resistance (Approx.) 30000

    920 Ω

    Published in approved 6FM7 target entry; Section1

  • Transconductance 2200

    6000 µS

    Published in approved 6FM7 target entry; Section1

  • Plate Current 2

    40 mA

    Published in approved 6FM7 target entry; Section1

SECTION 2

Triode

Other

  • Heater Voltage (ac/dc) 6.3

    13 V

    Published in approved 6FM7 target entry; Section2

  • Heater Current 1.05

    450 mA

    Published in approved 6FM7 target entry; Section2

  • Heater Warm-up Time (Average)

    11 seconds

    Published in approved 6FM7 target entry; Section2

  • —

    45 V

    Published in approved 6FM7 target entry; Section2

  • DC Plate Voltage 350

    500 V

    Published in approved 6FM7 target entry; Section2

  • Peak Positive-Pulse Plate Voltage*

    1500 V

    Published in approved 6FM7 target entry; Section2

  • Peak Negative-Pulse Plate Voltage 400

    250 V

    Published in approved 6FM7 target entry; Section2

  • Average Cathode Current

    50 mA

    Published in approved 6FM7 target entry; Section2

  • Plate Dissipation! 1

    10 W

    Published in approved 6FM7 target entry; Section2

  • For fixed-bias operation 1

    1 MΩ

    Published in approved 6FM7 target entry; Section2

  • For cathode-bias operation 2.2

    2.2 MΩ

    Published in approved 6FM7 target entry; Section2

Characteristic

  • Plate Voltage 250

    175 V

    Published in approved 6FM7 target entry; Section2

  • Grid Voltage —3

    -25 V

    Published in approved 6FM7 target entry; Section2

  • Plate Resistance (Approx.) 30000

    920 Ω

    Published in approved 6FM7 target entry; Section2

  • Transconductance 2200

    6000 µS

    Published in approved 6FM7 target entry; Section2

  • Plate Current 2

    40 mA

    Published in approved 6FM7 target entry; Section2