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Voltage Pentode ·Pentode

6C6

Early sharp-cutoff pentode designed for radio detector and fixed-gain RF amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6F
Socket code
UX6
Base pins
6
Nominal heater
6.3 V / 300 mA

Description

Fixed-slope RF pentode for detector and amplifier service.

Socket description

Small 6-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6F
Socket code
UX6
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

6F - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1000000 Ω
Transconductance
0.0018 S
Max plate voltage
300 V
Max screen voltage
125 V
Max cathode current
15 mA

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • ilaximum Plate Voltage

    250 V

    Published table

  • Plate Voltage

    100 V

    ClassA; Column1

  • Plate Voltage

    250 V

    ClassA; Column2

  • Plate Voltage

    250 V

    ClassA; Column3

  • Screen Voltage

    100 V

    ClassA; Column1

  • Screen Voltage

    100 V

    ClassA; Column2

  • Plate Resistance

    1 ohm

    ClassA; Column1

  • Plate Resistance

    1.5 ohm

    ClassA; Column2

  • Plate Resistance

    0.01 ohm

    ClassA; Column3

  • Plate Resistance

    5 ohm

    ClassA; Column4

  • Transconductance

    1185

    ClassA; Column1

  • Transconductance

    1225

    ClassA; Column2

  • Transconductance

    1900

    ClassA; Column3

  • Plate Current

    2 mA

    ClassA; Column1

  • Plate Current

    2 mA

    ClassA; Column2

  • Plate Current

    6.5 mA

    ClassA; Column3

  • Grid Bias (approximate)

    -7 V

    ClassA; Column1

  • Grid Bias (approximate)

    -7 V

    ClassA; Column2

  • Screen Voltage

    12 V

    ClassA; Column1

  • Screen Voltage

    30 V

    ClassA; Column2

  • Screen Voltage

    50 V

    ClassA; Column3

  • Screen Voltage

    100 V

    ClassA; Column4

  • Grid Bias

    1 V

    ClassA; Column1

  • Grid Bias

    16 V

    ClassA; Column2

  • Grid Bias

    -1.83 V

    ClassA; Column3

  • Grid Bias

    -1.95 V

    ClassA; Column4

  • Grid Bias

    -4.3 V

    ClassA; Column5

  • R-F Signal Voltage (RMS)

    1.05 V

    ClassA; Column1

  • R-F Signal Voltage (RMS)

    1.6 V

    ClassA; Column2

  • R-F Signal Voltage (RMS)

    1.18 V

    ClassA; Column3

  • R-F Signal Voltage (RMS)

    1.37 V

    ClassA; Column4

  • Output Peak Voltage i by

    17 V

    ClassA; Column1

  • Output Peak Voltage i by

    7 V

    ClassA; Column2

Capacitance

  • =

    1

    Published table; Column1

  • =

    5

    Published table; Column2

  • =

    3

    Published table; Column3

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Screen Voltage

    100 V

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    1600 µS

    Typical

  • Plate Resistance

    1000000 ohm

    Typical

Data set 03

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Anode Voltage

    250 V

  • Anode Current

    2 mA

  • Screen Voltage

    100 V

  • Screen Current

    0.5 mA

  • Control Grid Voltage

    -3 V

  • Cutoff Voltage

    -7 V

Data set 04

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum plate voltage

    300 V

    Published handbook rating

  • Maximum screen voltage

    125 V

    Published handbook rating

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    100 V

    ClassA

  • Control-grid bias

    3 V

    ClassA

  • Plate current

    2 mA

    ClassA

  • Screen current

    0.5 mA

    ClassA

Characteristic

  • Plate resistance

    1000000 ohm

    Published handbook characteristic

  • Transconductance

    1225 µS

    Published handbook characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

Capacitance

  • Input capacitance

    5 pF

    Published capacitance column

  • Output capacitance

    6.5 pF

    Published capacitance column

  • Grid-to-plate capacitance

    0.007 pF

    Published capacitance column

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Plate voltage

    250300 V

    Typical operating conditions

  • Plate current

    5.36.52.02.0 mA

    Typical operating conditions