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

Voltage - Dual Triode (similar high frequency) ·Triode-Triode

ECC84

Twin triode designed for low-noise VHF cascode RF amplification, particularly in Band III television and radio tuner front ends at frequencies around 220 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9C12
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 340 mA

Description

Dual triode for cascode RF amplification in television and VHF receivers.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9C12
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
340 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9C12 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
2000 Ω
Transconductance
0.0059 S
Amplification factor
24
Max plate voltage
180 V
Max plate dissipation
2 W
Max cathode current
22 mA

Published maximum ratings/characteristics promoted from source.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
2000 Ω
Transconductance
0.0059 S
Amplification factor
24
Max plate voltage
180 V
Max plate dissipation
2 W
Max cathode current
22 mA

Second physical triode restored.

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

1953 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Indirect (cathodes isolees du filament)

    68 V

    Triode

  • Alimentation du filament en parallele Ulf

    370 mA

    Triode

Other

  • Tension de l'anode

    90 V

    Triode

  • Tension de la grille

    -1.5 V

    Triode

  • Tension de l’anode

    180 V

    Triode

  • Puissance dissipee sur l'anode

    2 W

    Triode

  • Resistance du circuit de la grille G

    1.5 Mohm

    Triode

  • Resistance du circuit de la grille G’

    0.5 Mohm

    Triode

  • (cathode positive par rapport au filament). Vk'f

    200 V

    Triode

  • Tension entre filament et cathode K

    100 V

    Triode

Capacitance

  • Capacite de la grille

    21 pF

    Triode

  • Capacite de l'anode

    0.45 pF

    Triode

  • Capacite anode-grille

    1.2 pF

    Triode

  • Capacite anode-cathode

    0.16 pF

    Triode

  • Capacite cathode-(grille +filament) Ck'(gJ'+1)

    47 pF

    Triode

  • Capacite anode-(grille + filament) Ca‘(g'+f)

    25 pF

    Triode

  • Capacite cathode-filament

    27 pF

    Triode

  • + filament + grille G'

    12 pF

    Triode

  • Capacite anode A-anode A'

    0.035 pF

    Triode

  • Capacite grille G-anode A’

    0.006 pF

    Triode

Data set 02

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    340 mA

    Nominal

  • Maximum Plate Voltage

    180 V

  • Maximum Plate Dissipation

    2 W

  • Maximum Cathode Current

    20 mA

Characteristic

  • Transconductance

    6000 µS

    Typical

  • Amplification Factor

    24

    Typical

  • Plate Resistance

    4000 ohm

    Typical

Data set 03

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    335 mA

  • Application

    LowNoiseVHFcascodeAmplifier

    BandIII

Data set 04

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    340 mA

    Nominal

  • Maximum Plate Voltage

    250 V

Characteristic

  • Transconductance

    5900 µS

    Typical

  • Amplification Factor

    57

    Typical

  • Plate Resistance

    9700 ohm

    Typical

Data set 05

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    330 mA

  • MaximumOperatingFrequency

    220 MHz

    CascodeRFAmplifier

Data set 06

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Plate voltage

    90 V

    EachSection

  • Plate current

    12 mA

    EachSection

  • Grid voltage

    -1.5 V

    EachSection

  • Transconductance

    6 mA/V

    EachSection

  • Amplification factor

    24

    EachSection

  • Plate resistance

    2 kOhm

    EachSection

Other

  • Supply voltage

    250 V

    CascodeRF

  • Plate current

    12 mA

    CascodeRF

  • Maximum plate supply voltage

    550 V

    EachSection

  • Maximum plate voltage

    180 V

    EachSection

  • Maximum plate dissipation

    2 W

    EachSection

  • Maximum cathode current

    22 mA

    EachSection

Capacitance

  • Anode-to-grid capacitance

    1.2 pF

    EachSection

  • Input capacitance

    2.1 pF

    GroundedCathode

  • Output capacitance

    0.45 pF

    GroundedCathode

Data set 07

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Plate voltage

    90 V

    EachSection

  • Plate current

    12 mA

    EachSection

  • Grid voltage

    -1.5 V

    EachSection

  • Transconductance

    6 mA/V

    EachSection

  • Amplification factor

    24

    EachSection

  • Plate resistance

    2 kOhm

    EachSection

Other

  • Supply voltage

    250 V

    CascodeRF

  • Plate current

    12 mA

    CascodeRF

  • Maximum plate supply voltage

    550 V

    EachSection

  • Maximum plate voltage

    180 V

    EachSection

  • Maximum plate dissipation

    2 W

    EachSection

  • Maximum cathode current

    22 mA

    EachSection

Capacitance

  • Anode-to-grid capacitance

    1.2 pF

    EachSection

  • Input capacitance

    2.1 pF

    GroundedCathode

  • Output capacitance

    0.45 pF

    GroundedCathode

Data set 08

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    330 mA

    Published nominal value

  • Transconductance

    6000 µS

    Published nominal or operating characteristic

Other

  • Maximum plate dissipation

    2 W

    Published maximum rating

  • Cascode application

    RF cascode amplifier

    Published intended use

Data set 09

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • input conductance at,

    1 A

    input conductance at, 200 lic/s ) 1)

  • Conductance d'entrée a

    250 V

    Conductance d'entrée a 200 lc/s = 250 pA/V

  • Noise Tigure

    1

    Noise Tigure 1)

  • The noise figure will be reduced to about

    5 A

    The noise figure will be reduced to about 5 when the

Other

  • 1.7The section a,g,ki.ko is the grounded cathode triode

    1.7 A

    1.7The section a,g,ki.ko is the grounded cathode triode

  • 2.The grounded cathode section has two cathode leads,

    2 A

    2.The grounded cathode section has two cathode leads,

  • 1.7.a section a,g,ki.Ko est la triode & cathode & la terre

    1.7 A

    1.7.a section a,g,ki.Ko est la triode & cathode & la terre

  • 2.La triode a cathode &

    1 A

    2.La triode a cathode & 1a terre a deux connections de

  • la cathode,

    8 A

    la cathode, 1'une (kl) destinée d'8tre connectée au