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Voltage Radio Detector Converter ·Pentode-Triode

ECF82

Triode-pentode for VHF oscillator and frequency-converter service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
B9A
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 450 mA

Description

Combined triode and pentode intended for VHF oscillator and frequency-converter service.

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

B9A - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
400000 Ω
Transconductance
0.0075 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.5 W
Max screen dissipation
0.5 W
Max cathode current
25 mA

Published maximum ratings/characteristics promoted from source.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
18000 Ω
Transconductance
0.0055 S
Amplification factor
50
Max plate voltage
250 V
Max plate dissipation
1.5 W
Max cathode current
20 mA

Published maximum ratings/characteristics promoted from source.

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 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Screen Voltage

    300 V

  • Maximum Plate Dissipation

    2.5 W

  • Maximum Screen Dissipation

    0.5 W

  • Maximum Cathode Current

    25 mA

Characteristic

  • Transconductance

    5200 µS

    Typical

  • Plate Resistance

    300000 ohm

    Typical

SECTION 2

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Plate Dissipation

    1.5 W

  • Maximum Cathode Current

    20 mA

Characteristic

  • Transconductance

    8500 µS

    Typical

  • Amplification Factor

    55

    Typical

  • Plate Resistance

    18000 ohm

    Typical

Data set 02

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • ConversionServiceFrequency

    200 MHz

    BandsIAndII

SECTION 2

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    450 mA

Data set 03

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Screen Voltage

    250 V

  • Maximum Plate Dissipation

    2.5 W

Characteristic

  • Transconductance

    7500 µS

    Typical

SECTION 2

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    450 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    1.5 W

Characteristic

  • Transconductance

    5500 µS

    Typical

  • Amplification Factor

    50

    Typical

Data set 04

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • MaximumFrequencyChangerFrequency

    220 MHz

    Television

SECTION 2

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    450 mA

Data set 05

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

  • Heater/filament voltage

    6.3 V

    Published rating

  • Heater/filament current

    450 mA

    Published rating

  • Pentode transconductance

    4000 µS

    PentodeSection

  • Triode amplification factor

    40

    TriodeSection

Other

  • Pentode plate voltage

    300 V

    PentodeSection

  • Pentode plate current

    10 mA

    PentodeSection

  • Pentode control-grid bias

    -0.7 V

    PentodeSection

  • Pentode screen current

    3.5 mA

    PentodeSection

  • Triode plate voltage

    150 V

    TriodeSection

  • Triode control-grid bias

    -1 V

    TriodeSection

  • Triode plate current

    18 mA

    TriodeSection

Data set 06

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

  • Tension filAMEnt …….……ccresrsrsecssocressomcrsessesenseenseceseossececsaeceness VÊ

    6.3 V

  • Heater current …..…..….….……msses If

    450 mA

  • Tension d'AnOdE …….……srereseenesenessenmnnens Vä 300

    300 V

  • Tension de grille n° Z ……...uerserecrnvereseesceuues… VE

    300 V

  • Puissance appliquée à 1a gnlle n° 2 …. PgnN

    0.5 W

  • Tension entre filament et cathode …………..…….. VfK 90

    90 V

  • TeEnsion d'AnOdE ….……cerrreresssesensemreesenensu… VA 150

    250 V

  • Screen-grid voltage …. Veg,

    110 V

  • Plate current …… …… Ia 18

    10 mA

  • Courant de grille n° 2 …… Ig2

    3.5 mA

  • envacorrenserase aneonesmeenesecueuse SS 8,5

    5.2 mA

  • RÉSISTANCE INtErNE …….………cercencsesaemncsenssseeuces P 5

    400 kΩ

  • =10 ;LA) …… -Vgbl -12

    -10 V

Characteristic

  • Capacitance grille/anode …… Ce/a 1,8

    1.8 pF

    InterelectrodeCapacitance

  • Capacitance d'entrée . Ce 2,5

    2.5 pF

    InterelectrodeCapacitance

  • Capacitance de soiîtie …. …… Cs 1,0

    0.4 pF

    InterelectrodeCapacitance

  • Capacitance grille n° 1/anode …. Cg,/a 0,006

    0.01 pF

    InterelectrodeCapacitance

  • Capacitance d'entrée …… Ce 5

    5 pF

    InterelectrodeCapacitance

  • Capacitance de sortie …… CS 3,5

    2.6 pF

    InterelectrodeCapacitance

Data set 07

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

  • Heater Voltage Vh

    63 V

  • Heater Current Ih

    45 A