Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Voltage - Triode (single) ·Triode

6F5

High-mu triode for voltage-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5M
Socket code
IO
Base pins
5
Nominal heater
6.3 V / 300 mA

Description

High-mu triode for voltage-amplifier service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5M
Socket code
IO
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5M - 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
66000 Ω
Transconductance
0.0015 S
Amplification factor
100
Max plate voltage
300 V
Max plate dissipation
1 W

Published nominal characteristics at 250 V plate, -2 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

    -2 V

  • Plate current

    0.9 mA

  • Grid-plate capacitance

    2 pF

  • Grid-cathode capacitance

    6 pF

  • Plate-cathode capacitance

    12 pF

Other

  • Plate load resistor

    0.25 to 1 MOhm

    ResistanceCoupled

  • Voltage amplification

    51 to 60

    ResistanceCoupled

Data set 02

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Maximum Plate Voltage

    250 V

    Published table

Capacitance

  • Wy R Plate Voltage

    250 V

    Published table

  • Py ™ Amplification Factor

    100

    Published table

  • SMRLL Plate Resistance

    66000 ohm

    Published table

  • OCTAL BRSE Transconductance

    1500 uS

    Published table

  • [y + Plate Current

    0.9 mA

    Published table

  • Plate Supply Voltage

    250 V

    Published table; Column1

  • Plate Supply Voltage

    250 V

    Published table; Column2

  • Plate Resistor

    0.25 ohm

    Published table; Column1

  • Plate Resistor

    1 ohm

    Published table; Column2

  • Plate Resistor

    0.25 ohm

    Published table; Column3

  • Plate Resistor

    1 ohm

    Published table; Column4

  • Plate Current

    0.2 mA

    Published table; Column1

  • Plate Current

    0.4 mA

    Published table; Column2

  • Plate Current

    0.2 mA

    Published table; Column3

  • Plate Current

    0.4 mA

    Published table; Column4

  • Voltage Output (RMS) I

    11 V

    Published table; Column1

  • Voltage Output (RMS) I

    20 V

    Published table; Column2

  • Voltage Output (RMS) I

    14.5 V

    Published table; Column3

  • Voltage Output (RMS) I

    25.5 V

    Published table; Column4

Data set 03

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    300 mA

    Published nominal value

  • Transconductance

    1500 µS

    Published operating characteristic

  • Amplification factor

    100

    Published operating characteristic

Capacitance

  • Grid-to-plate capacitance

    2 pF

    Published

  • Input capacitance

    5 pF

    Published

Data set 04

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Tension de chauffage CA ou CC ... ... 6,3 6,3 volts

    6.3 V

    Tension de chauffage CA ou CC ... ... 6,3 6,3 volts

  • Courant de chaufiage 0,3 0,3 ampeére

    300 mA

    Courant de chaufiage 0,3 0,3 ampeére

  • Tension de chauffage 6,3 volts

    6.3 V

    Tension de chauffage 6,3 volts

  • Tension grille* ... . wh i wee wee eee e —2 volts

    2 V

    Tension grille* ... . wh i wee wee eee e —2 volts

  • Courant plaque* 0,9 ma.

    0.9 mA

    Courant plaque* 0,9 ma.

Other

  • Tension plaque ... .. i sve il ere e e 250 volts max.

    250 V

    Tension plaque ... .. i sve il ere e e 250 volts max.

Data set 05

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    ClassA

  • Control-grid bias magnitude

    2 V

    ClassA

  • Plate current

    0.9 mA

    ClassA

  • Plate resistance

    66000 ohm

    ClassA

  • Transconductance

    1500 uS

    ClassA

  • Amplification factor

    100

    ClassA

  • Plate voltage

    100 V

    ClassA

  • Control-grid bias magnitude

    1 V

    ClassA

  • Plate current

    0.4 mA

    ClassA

  • Plate resistance

    85000 ohm

    ClassA

  • Transconductance

    1150 uS

    ClassA

  • Amplification factor

    100

    ClassA