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Voltage Triode Pentode ·Pentode-Triode

6P7G

Combined triode-pentode for general amplification or receiving-equipment service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
7U
Socket code
IO
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

Combined pentode-triode receiving tube.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7U
Socket code
IO
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7U - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
850000 Ω
Transconductance
0.0011 S
Max plate voltage
250 V
Max screen voltage
100 V

Promoted from printed maximum-rating/characteristic columns; additional published operating points and capacitances retained as parameters.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
16000 Ω
Transconductance
0.0005 S
Amplification factor
8
Max plate voltage
100 V

Promoted from printed maximum-rating/characteristic columns; additional published operating points and capacitances retained as parameters.

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

Pentode

Capacitance

  • Grid-to-plate capacitance

    0.008 pF

    Pentode

  • Input capacitance

    3.5 pF

    Pentode

  • Output capacitance

    12 pF

    Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    100 V

    ClassA

  • Grid bias

    -3 V

    ClassA

  • Plate current

    6.5 mA

    ClassA

  • Screen current

    1.5 mA

    ClassA

  • Oscillator peak voltage input

    7 V

    Converter

Characteristic

  • Plate resistance

    850000 Ω

    Pentode

  • Transconductance

    1100 µS

    Pentode

  • Conversion conductance

    200 µS

    Converter

SECTION 2

Triode

Capacitance

  • Grid-to-plate capacitance

    2 pF

    Triode

  • Input capacitance

    3.5 pF

    Triode

  • Output capacitance

    3 pF

    Triode

Other

  • Plate voltage

    100 V

    ClassA

  • Grid bias

    -3 V

    ClassA

  • Plate current

    3.5 mA

    ClassA

Characteristic

  • Plate resistance

    16000 Ω

    Triode

  • Transconductance

    500 µS

    Triode

  • Amplification factor

    8

    Triode

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    100 V

    ClassA

  • Control-grid voltage

    -3 V

    ClassA

  • Plate current

    6.5 mA

    ClassA

  • Screen current

    1.5 mA

    ClassA

Characteristic

  • Plate resistance

    850000 Ω

    ClassA

  • Transconductance

    1100 µS

    ClassA

SECTION 2

Triode

Other

  • Plate voltage

    100 V

    ClassA

  • Control-grid voltage

    -3 V

    ClassA

  • Plate current

    3.5 mA

    ClassA

Characteristic

  • Plate resistance

    16000 Ω

    ClassA

  • Transconductance

    500 µS

    ClassA

  • Amplification factor

    8

    ClassA