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Power - TV Vertical Output ·Triode-Triode

6EA7

Dissimilar dual triode designed as a television vertical-deflection oscillator and amplifier. A high-gain section drives the circuit while the low-mu power section supplies the current and pulse capability required by the vertical output stage.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8BO
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 1.05 A

Description

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

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8BO
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
1.05 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8BO - 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
34000 Ω
Transconductance
0.0019 S
Amplification factor
45
Max plate voltage
350 V
Max plate dissipation
1 W
Max cathode current
20 mA

Section 1, vertical oscillator service.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
770 Ω
Transconductance
0.0065 S
Amplification factor
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

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    Section1;Oscillator

  • Maximum peak negative grid voltage

    400 V

    Section1;Oscillator

SECTION 2

Triode

Other

  • Peak positive pulse plate voltage

    1500 V

    Section2;VerticalDeflection

  • Peak cathode current

    175 mA

    Section2;VerticalDeflection

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

    1.5 mA

    Oscillator

SECTION 2

Triode

Characteristic

  • Plate Voltage

    175 V

    Amplifier

  • Plate Current

    48 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

  • Heater voltage

    6.3 V

  • Heater current

    1.05 A

  • Plate voltage

    250 V

    Section1;ClassA

  • Grid voltage

    -3 V

    Section1;ClassA

  • Plate current

    2.5 mA

    Section1;ClassA

Characteristic

  • Amplification factor

    66

    Section1

  • Plate resistance

    25000 ohm

    Section1

  • Transconductance

    2600 uS

    Section1

Capacitance

  • Grid-to-plate capacitance

    4 pF

    Section1

SECTION 2

Triode

Other

  • Plate voltage

    175 V

    Section2;ClassA

  • Grid voltage

    -25 V

    Section2;ClassA

  • Plate current

    50 mA

    Section2;ClassA

Characteristic

  • Amplification factor

    5.5

    Section2

  • Plate resistance

    900 ohm

    Section2

  • Transconductance

    6100 uS

    Section2

Capacitance

  • Grid-to-plate capacitance

    8.5 pF

    Section2

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid to Plate

    4.8 pF

    Section1

  • Grid to Cathode and Heater

    2.2 pF

    Section1

  • Plate to Cathode and Heater

    0.6 pF

    Section1

Characteristic

  • Plate Voltage

    250 V

    ClassA

  • Grid Voltage

    -3 V

    ClassA

  • Plate Current

    1.4 mA

    ClassA

Other

  • Peak Negative-Pulse Grid Voltage

    400 V

    VerticalDeflection

SECTION 2

Triode

Capacitance

  • Grid to Plate

    10 pF

    Section2

  • Grid to Cathode and Heater

    7 pF

    Section2

  • Plate to Cathode and Heater

    1.8 pF

    Section2

Characteristic

  • Plate Voltage

    150 V

    ClassA

  • Grid Voltage

    -20 V

    ClassA

  • Plate Current

    50 mA

    ClassA

Other

  • Peak Positive-Pulse Plate Voltage

    1500 V

    VerticalDeflection

  • Average Cathode Current

    50 mA

    VerticalDeflection