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Voltage - Dual Triode (similar) ·Triode-Triode

6C8G

Double-triode amplifier with separately brought-out electrodes, intended for general receiver voltage amplification and related signal-processing applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8G
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 300 mA

Description

Double-triode amplifier with separately brought-out electrodes.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8G
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8G - 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
22500 Ω
Transconductance
0.0016 S
Amplification factor
38
Max plate voltage
250 V

Representative identical section.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
22500 Ω
Transconductance
0.0016 S
Amplification factor
38
Max plate voltage
250 V

Second identical physical triode section; added to align rows with SectionCount.

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 Ken Rad

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Plate Voltage

    250 V

    Plate Voltage 250 Volts Max.

  • Grid Voltage

    -4.5 V

    Grid Voltage -4.5 Volts

  • Plate Current

    3.1 mA

    Plate Current 3.1 Milliamperes

  • Mutual Conductance

    1450 µS

    Mutual Conductance 1,450 Micromhos

  • Amplification Factor

    38 ratio

    Amplification Factor 38

Other

  • Plate Supply Voltage

    250 V

    #Plate Supply Voltage 250 250 Volts

  • Grid Voltage

    -3 V

    Grid Voltage -3.0 -3.0 Volts

  • Plate Current

    1 A

    Plate Current Per Triode 1.7 1.0 ¥illiamperes

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • OCTAL BASE Max. Plate Voltage

    250 V

    Published table

  • Grid to Plate

    2.5 pF

    Published table; Column1

  • Grid to Plate

    2.4 pF

    Published table; Column2

  • Input

    3.4

    Published table; Column1

  • Input

    2.5

    Published table; Column2

  • Plate Voltage

    250 V

    ClassA

  • Amplification Factor

    38

    ClassA

  • Plate Resistance

    26000 ohm

    ClassA

  • Plate Current

    3.1 mA

    ClassA

  • Plate Supply Voltage

    250 V

    ClassA; Column1

  • Plate Supply Voltage

    250 V

    ClassA; Column2

  • Plate Current (per plate)

    1.7 mA

    ClassA; Column1

  • Plate Current (per plate)

    1 mA

    ClassA; Column2

  • Plate Resistor %per plate)

    0.05 ohm

    ClassA; Column1

  • Plate Resistor %per plate)

    0.1 ohm

    ClassA; Column2

  • Maximum Output Voltage RHMS (G to G)

    60 V

    ClassA; Column1

  • Maximum Output Voltage RHMS (G to G)

    80 V

    ClassA; Column2

Data set 03

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

    4.5 V

    ClassA

  • Plate current

    3.2 mA

    ClassA

Characteristic

  • Plate resistance

    22500 ohm

    Published handbook characteristic

  • Transconductance

    1600 µS

    Published handbook characteristic

  • Amplification factor

    36

    Published handbook characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

Data set 04

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 current

    3.2 mA

    Typical operating conditions