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Voltage - Triode (single high frequency) ·Triode

6AF4

High-frequency triode for UHF/VHF amplification, mixing, or oscillator service in television, FM, communications, or specialized RF equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
E7-1
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 225 mA

Description

UHF triode (6AF4) with low lead inductance for oscillator and grounded-grid amplifier service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
E7-1
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
225 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

E7-1 - 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
2100 Ω
Transconductance
0.0065 S
Amplification factor
13.5
Max plate voltage
150 V
Max plate dissipation
2.5 W
Max cathode current
20 mA
Rectifier peak inverse voltage
0.022 V
Rectifier max heater-cathode voltage
50 V

Published promoted fields populated from the datasheet; identical repeated sections compressed where applicable.

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

Capacitance

  • Input capacitance

    2.2 pF

    Published table value

  • Output capacitance

    0.45 pF

    Published table value

  • Grid-to-plate capacitance

    1.9 pF

    Published table value

Other

  • Plate voltage

    80 V

    ClassA

  • Cathode resistor

    150 ohm

    ClassA

  • Plate current

    16 mA

    ClassA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid To Cathode Heater Capacitance

    2.2 pF

  • Plate To Cathode Heater Capacitance

    1.4 pF

Data set 03

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    225 mA

  • Plate Voltage

    100 V

  • Grid Voltage

    -2.5 V

  • Plate Current

    12 mA

  • Plate Resistance

    5000 ohm

  • Transconductance

    7000 uS

  • Amplification Factor

    35

  • Grid To Plate Capacitance

    1.5 pF

  • Input Capacitance

    2 pF

  • Output Capacitance

    1 pF

  • MaximumOperatingFrequency

    500 MHz

    Oscillator

Data set 04

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    80 V

    UHFOscillator

  • Plate current

    17.5 mA

    UHFOscillator

  • Plate voltage

    100 V

    GroundedGridAmplifier

  • Plate current

    17 mA

    GroundedGridAmplifier

  • Application

    UHF oscillator and grounded-grid amplifier service

    Section1

Characteristic

  • Transconductance

    6500 µS

    Section1

  • Amplification factor

    13.5

    Section1

  • Plate resistance

    2100 Ω

    Section1

Data set 05

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterOrFilamentVoltageNominal

    6.3 V

  • HeaterOrFilamentCurrentNominal

    225 mA

  • Maximum Plate Voltage

    150 V

  • Maximum Plate Dissipation

    2.5 W

  • Maximum Peak Inverse Voltage

    0.022 V

Characteristic

  • Plate Resistance

    2100 Ohm

  • Transconductance

    6500 uS

  • Amplification Factor

    13.5