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Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode

6C7

Double-diode medium-mu triode for detector, AVC, and audio amplifier service. Paired diodes provide signal and control-voltage rectification while the triode favors useful current drive over exceptionally high voltage gain.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
7G
Socket code
-
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

The 6C7 is a DualDiodeTriode vacuum tube as described by the source datasheet.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

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

7G - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

3 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
16000 Ω
Transconductance
0.00125 S
Amplification factor
20
Max plate voltage
250 V

Published maximum ratings, operating characteristics, rectifier data, and capacitances reviewed.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published maximum ratings, operating characteristics, rectifier data, and capacitances reviewed.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published maximum ratings, operating characteristics, rectifier data, and capacitances reviewed.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    250 V

    Published handbook rating

  • Plate voltage

    250 V

    ClassA

  • Control-grid bias

    9 V

    ClassA

  • Plate current

    5.5 mA

    ClassA

Characteristic

  • Plate resistance

    16000 ohm

    Published handbook characteristic

  • Transconductance

    1250 µS

    Published handbook characteristic

  • Amplification factor

    20

    Published handbook characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Plate voltage

    250 V

    Typical operating conditions

  • Plate current

    4.5 mA

    Typical operating conditions

SECTION 2

Diode

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Plate voltage

    250 V

    Typical operating conditions

  • Plate current

    4.5 mA

    Typical operating conditions

SECTION 3

Diode

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Plate voltage

    250 V

    Typical operating conditions

  • Plate current

    4.5 mA

    Typical operating conditions