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

Voltage - Triode (single high frequency) ·Triode

5718

Subminiature medium-mu triode for high-frequency oscillators and general-purpose amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
WireLead
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 150 mA

Description

The 5718 is a subminiature medium-mu triode designed for high-frequency oscillator or general-purpose amplifier service and can deliver about 0.9 watt at 500 MHz.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

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

WireLead - 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
4150 Ω
Transconductance
0.0065 S
Amplification factor
27
Max plate voltage
165 V
Max plate dissipation
3.3 W
Max cathode current
22 mA
Rectifier max heater-cathode voltage
200 V

Electrical section extracted from supplied datasheet.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Useful Power Output

    600 mW

    Oscillator

  • MaximumFrequencyFullInput

    1000 MHz

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    150 mA

Data set 03

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    150 mA

Data set 04

1958 Compagnie General

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Operating Frequency

    500 MHz

    Oscillator

  • Useful Oscillator Output

    600 mW

    500MHz

Characteristic

  • Amplification Factor

    27

  • Plate Resistance

    4150 ohm

  • Transconductance

    6500 uS

Data set 05

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    UHF amplifier / oscillator

Characteristics

  • Useful operating frequency

    500 MHz

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    150 mA

    Nominal

  • Plate voltage

    165 V

    Published operating table; OperatingPoint1

  • Plate voltage

    100 V

    Published operating table; OperatingPoint1

  • Plate voltage

    150 V

    Published operating table; OperatingPoint1

  • RF power output

    0.9 W

    500 MHz

Characteristic

  • Plate current

    22 mA

    Published operating table; OperatingPoint1

  • Plate current

    8.5 mA

    Published operating table; OperatingPoint1

  • Plate current

    20 mA

    Published operating table; OperatingPoint1

Data set 07

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    150 mA

  • Plate Voltage

    100 V

  • Grid Voltage

    -1.3 V

  • Plate Current

    8.5 mA

  • Transconductance

    5800 uS

  • MaximumOscillatorFrequency

    500 MHz

Data set 08

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid capacitance with external screen

    2.4 pF

    Section1

  • Plate capacitance with external screen

    2.4 pF

    Section1

  • Grid-to-plate capacitance with external screen

    1.3 pF

    Section1

Other

  • Plate voltage

    100 V

    RFAmplifier

  • Plate current

    8.5 mA

    RFAmplifier

  • Plate voltage

    150 V

    RFAmplifier

  • Plate current

    13 mA

    RFAmplifier

  • Oscillator frequency

    500 MHz

    Oscillator

Characteristic

  • Transconductance

    5800 µS

    100VPlate

  • Plate resistance

    4650 Ω

    100VPlate

  • Amplification factor

    27

    Section1

  • Transconductance

    6500 µS

    150VPlate

  • Plate resistance

    4150 Ω

    150VPlate

Data set 09

1963 Philips Electron Tubes Handbook V3

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid capacitance with external shield

    2.4 pF

    Section1

  • Plate capacitance with external shield

    2.4 pF

    Section1

  • Grid-to-plate capacitance with external shield

    1.3 pF

    Section1

Other

  • Plate voltage

    100 V

    RFAmplifier

  • Plate current

    8.5 mA

    RFAmplifier

  • Plate voltage

    150 V

    RFAmplifier

  • Plate current

    13 mA

    RFAmplifier

  • Oscillator frequency

    500 MHz

    Oscillator

Characteristic

  • Transconductance

    5800 µS

    100VPlate

  • Plate resistance

    4650 Ω

    100VPlate

  • Transconductance

    6500 µS

    150VPlate

  • Plate resistance

    4150 Ω

    150VPlate

  • Amplification factor

    27

    Section1

Data set 10

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Grid-to-plate capacitance without shield

    1.4 pF

    WholeTube

  • Input capacitance without shield

    2.2 pF

    WholeTube

  • Output capacitance without shield

    0.7 pF

    WholeTube

Other

  • Maximum plate voltage

    165 V

    WholeTube

  • Maximum plate dissipation

    0.9 W

    WholeTube

  • Maximum DC plate current

    22 mA

    WholeTube

  • Maximum DC grid current

    5.5 mA

    WholeTube

  • Maximum heater-cathode voltage

    200 V

    WholeTube

  • Plate voltage

    100 V

    ClassA1

  • Cathode bias resistance

    150 ohm

    ClassA1

  • Amplification factor

    27

    ClassA1

  • Plate resistance

    4550 ohm

    ClassA1

Data set 11

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-to-Plate Capacitance

    1.3 pF

    PublishedCapacitance

  • Input Capacitance

    2.3 pF

    PublishedCapacitance

  • Output Capacitance

    0.8 pF

    PublishedCapacitance

Characteristic

  • Plate Voltage

    100 V

    PublishedCharacteristics

  • Grid Voltage

    -1.3 V

    PublishedCharacteristics

  • Plate Current

    8.5 mA

    PublishedCharacteristics

  • Transconductance

    5800 uS

    PublishedCharacteristics

  • Plate Resistance

    4700 ohm

    PublishedCharacteristics

  • Amplification Factor

    27

    PublishedCharacteristics

Other

  • Plate Supply Voltage

    330 V

    AbsoluteRatings

  • Plate Voltage

    165 V

    AbsoluteRatings

  • Plate Dissipation

    0.9 W

    AbsoluteRatings

Data set 12

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    - to 165 V

  • Maximum plate dissipation

    - to 3.3 W

  • Maximum cathode current

    - to 22 mA

Characteristics

  • Plate resistance

    4150 Ω

  • Transconductance

    6500 µS

  • Amplification factor

    27

  • Plate supply voltage

    100 V

    ClassA

  • Plate supply voltage

    150 V

    ClassA

  • Cathode resistor

    150 Ω

    ClassA

  • Cathode resistor

    180 Ω

    ClassA

  • Amplification factor

    27

    ClassA

  • Plate resistance

    4650 Ω

    ClassA

  • Plate resistance

    4150 Ω

    ClassA

Data set 13

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    150 mA

  • Plate voltage

    150 V

  • Plate current

    13 mA

  • Transconductance

    6500 uS

  • Amplification factor

    27

  • Plate resistance

    4150 ohm

Other

  • Oscillator output power

    0.9 W

    500MHz