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Power - Triode ·Triode-Triode

6E6

Dual low-mu power triode designed for audio output, with its sections usable in push-pull or parallel Class A service. Published operation at 250 V gives about 1.6 W output with both sections.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
7B
Socket code
MEDIUM7
Base pins
7
Nominal heater
6.3 V / 600 mA

Description

Dual low-mu power triode in one envelope, usable with its sections in parallel or push-pull for Class-A audio power amplification.

Socket description

Medium 7-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7B
Socket code
MEDIUM7
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7B - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1H—H — Heater

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

PIN22PBP — Plate (Anode)

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

PIN32G1BG1 — Control Grid

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

PIN4KAK — Cathode

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

PIN51G1AG1 — Control Grid

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

PIN61PAP — Plate (Anode)

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

PIN7H—H — Heater

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

CAP1G4AG4 — Fourth Grid

EIA transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7B

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
4300 Ω
Transconductance
0.0014 S
Amplification factor
6
Max plate voltage
250 V

Values promoted only where clearly published for this section in the approved source.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
4300 Ω
Transconductance
0.0014 S
Amplification factor
6
Max plate voltage
250 V

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • EE Maximum Plate Voltage

    250 V

    Published table

  • Plate Voltage

    180 V

    ClassA; Column1

  • Plate Voltage

    250 V

    ClassA; Column2

  • Amplification Factor [¢]

    6

    ClassA

  • Transconductance

    1400 uS

    ClassA; Column1

  • Transconductance

    1700 uS

    ClassA; Column2

  • Plate Current

    11.5 mA

    ClassA; Column1

  • Plate Current

    18 mA

    ClassA; Column2

  • Plate Current (per plate}

    11.5

    ClassA; Column1

  • Plate Current (per plate}

    18

    ClassA; Column2

  • Load Resistance (plate to plate)

    15000 ohm

    ClassA; Column1

  • Load Resistance (plate to plate)

    14000 ohm

    ClassA; Column2

  • Power Output

    0.75 W

    ClassA; Column1

  • Power Output

    1.6 W

    ClassA; Column2

Data set 02

1938 National Union

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater Voltage (A.C. or D.C.)

    6.3 Volts

    Published source value; see source line context.

  • Plate Voltage

    180 Volts

    Published source value; see source line context.

  • Grid Voltage

    -20 Volts

    Published source value; see source line context.

  • Load Resistance

    15000 Ohms

    Published source value; see source line context.

  • Undistorted Power Output

    0.75 Watts

    Published source value; see source line context.

  • cathode circuit. For

    250 volt

    Published source value; see source line context.

  • resistor should be

    770 volt

    Published source value; see source line context.

  • operation, it should be

    870 ohms

    Published source value; see source line context.

Characteristic

  • Heater Current

    0.6 Amperes

    Published source value; see source line context.

  • Plate Resistance

    4300 Ohms

    Published source value; see source line context.

  • bias, the resistance should not exceed

    100000 ohms

    Published source value; see source line context.

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Current

    18 mA

    Per plate at 250 V

  • Plate-to-Plate Load Impedance

    14000 ohm

    Push-pull

  • Power Output

    1.6 W

    Both sections; 250 V

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Control-grid bias magnitude

    27.5 V

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Plate current

    15 mA

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Plate resistance

    3500 ohm

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Transconductance

    1700 uS

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Amplification factor

    6

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Load resistance

    14000 ohm

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable

  • Power output

    1.6 W

    ClassA; BothSectionsPushPull; ValuesMarkedPerSectionWhereApplicable