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Voltage - Triode (single) ·Triode

6C5

General-purpose triode for amplifier and detector service in radio receiving equipment, combining small-signal voltage amplification with detector capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6O
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 300 mA

Description

General-purpose triode amplifier/detector.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6O
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

6O - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
10000 Ω
Transconductance
0.002 S
Amplification factor
20
Max plate voltage
300 V
Max cathode current
20 mA

Published nominal characteristics at 250 V plate, -8 V grid.

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

1935 RCA All Metal Radio Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Grid voltage

    -8 V

  • Plate current

    8 mA

  • Grid-plate capacitance

    1.8 pF

  • Grid-cathode capacitance

    4 pF

  • Plate-cathode capacitance

    13 pF

Other

  • Voltage amplification

    14

    ResistanceCoupled

  • Voltage output at 5% second harmonic

    42 V RMS

    ResistanceCoupled

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum Plate Voltage

    250 V

    Published table

  • //

    39 V

    ClassA; Column1

  • //

    4415 V

    ClassA; Column2

  • //

    250 V

    ClassA; Column3

  • Plate Resistance

    10000 ohm

    ClassA

  • acml.Mss Transconductance

    2000 uS

    ClassA

  • Plate Supply Voltage

    250 V

    ClassA

  • Grid Bias (approximate)

    -5 V

    ClassA

  • Plate Resistor

    50000 ohm

    ClassA; Column1

  • Plate Resistor

    10000 ohm

    ClassA; Column2

  • Plate Current

    1 mA

    ClassA

  • vVoltage Output (

    5 V

    ClassA; Column1

  • vVoltage Output (

    42 V

    ClassA; Column2

  • Plate Voltage

    250 V

    ClassA

  • Plate Current Adjusted to

    0.2 mA

    ClassA

  • Plate Voltage

    45 V

    ClassA; Column1

  • Plate Voltage

    100 V

    ClassA; Column2

  • Grid Leak Resistance

    0.1 ohm

    ClassA; Column1

  • Grid Leak Resistance

    1 ohm

    ClassA; Column2

Data set 03

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Cathode Current

    20 mA

Characteristic

  • Transconductance

    2000 µS

    Typical

  • Amplification Factor

    20

    Typical

  • Plate Resistance

    10000 ohm

    Typical

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    300 V

    Published handbook rating

  • Plate voltage

    250 V

    ClassA

  • Control-grid bias

    8 V

    ClassA

  • Plate current

    8 mA

    ClassA

Characteristic

  • Plate resistance

    10000 ohm

    Published handbook characteristic

  • Transconductance

    2000 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

Capacitance

  • Input capacitance

    3 pF

    Published capacitance column

  • Output capacitance

    11 pF

    Published capacitance column

  • Grid-to-plate capacitance

    2 pF

    Published capacitance column

Data set 05

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

    8 mA

    Typical operating conditions