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Voltage - Triode (with diode, heptode or hexode) ·Hexode-Triode

ECH83

Low-voltage triode-heptode for frequency-changing and amplification from unusually small electrode supplies. The triode provides oscillator action while the multi-grid section performs receiver frequency conversion.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9C12
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 300 mA

Description

Triode-heptode for frequency-changing or combined RF/AF amplification in equipment operating directly from 6, 12, or 24 V batteries.

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
300 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

Hexode

X-ray radiationInterelectrode capacitances
Plate resistance
5000000 Ω
Transconductance
0.0015 S
Amplification factor
20
Max plate voltage
50 V
Max screen voltage
50 V
Max plate dissipation
0.8 W
Max screen dissipation
0.5 W
Max cathode current
5 mA

Heptode section; values semantically promoted from published characteristics/maximum-ratings tables where present.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9000 Ω
Transconductance
0.0022 S
Amplification factor
20
Max plate voltage
250 V
Max plate dissipation
0.8 W
Max cathode current
6.5 mA

Triode section; values semantically promoted from published characteristics/maximum-ratings tables where present.

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

Hexode

Characteristic

  • Indirect (cathode isolee du filament)

    63 V

    Heptode

  • Alimentation en parallele ou en serie. ! f

    300 mA

    Heptode

Other

  • Tension de l’anode Va

    25 V

    Heptode

  • Tension des grilles 2 et 4

    25 V

    Heptode

  • Tension efficace d’oscillat

    35 V

    Heptode

  • grille 3

    47 kohm

    Heptode

  • Resistance interne

    5 Mohm

    Heptode

  • Pente de conversion

    450 uA

    Heptode

  • Tension de l’anode

    25 V

    Heptode

  • Tension des griiles 2,3 et 4 Vg243:4a

    25 V

    Heptode

  • Courant anodique

    1.25 mA

    Heptode

  • Courant des grilles 2, 3, 4 . lÿ2:3+4

    0.85 mA

    Heptode

  • Resistance interne

    2 Mohm

    Heptode

  • Pente

    1.5 mA/V

    Heptode

  • Resist. equival. de souffle. Req

    5 kohm

    Heptode

  • Capacite de l'anode

    7.9 pF

    Heptode

  • Capacite de la grille 1

    48 pF

    Heptode

  • Capacite anode-grille 1

    0.012 pF

    Heptode

  • Capacite de la grille 3

    6 pF

    Heptode

  • Capacite grille 1 — grille 3

    3 pF

    Heptode

  • Tension de l'anode

    50 V

    Heptode

  • Tension des grilles 2 et 4

    50 V

    Heptode

  • Courant cathodique

    5 mA

    Heptode

  • Resistance du circuit de la grille 3

    50 kohm

    Heptode

  • Tension entre filament et cathode

    150 V

    Heptode

SECTION 2

Triode

Other

  • Tension de l'anode

    25 V

    Triode

  • Courant anodique

    2 mA

    Triode

  • Tension de l’anode

    250 V

    Triode

  • Puissance dissipee sur l'anode

    8 W

    Triode

  • 0 S

    6.5 mA

    Triode

  • Resistance du circuit de la grille

    3 Mohm

    Triode

  • Resistance du circuit filament-cathode . Rkf

    20 kohm

    Triode

  • Tension entre filament et cathode

    150 V

    Triode

  • (3) Composante continue, 100 V

    100 V

    Triode

  • EUHHVa,, 4

    6.3 V

    Triode

Capacitance

  • Capacite de l’anode

    21 pF

    Triode

  • Capacite de la grille

    26 pF

    Triode

  • Capacite anode-grille

    1 pF

    Triode

  • Caxn — oT < 0,09 pF CaixH (gT + 3) < 0,45 pF

    0.45 pF

    Triode

  • Coixn— aT < 0,06 pF Cax (gT — 3) < 0,35 pF

    0.35 pF

    Triode

  • (1) Obtenue par polarisation avec Rg,

    1 Mohm

    Triode

  • (2) Obtenue par polarisation avec Rg

    47 kohm

    Triode

Data set 02

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

  • Triode transconductance

    2200 µS

    TriodeSection

  • Triode amplification factor

    20

    TriodeSection

Other

  • Triode plate voltage

    25 V

    TriodeSection

  • Triode plate current

    2 mA

    TriodeSection

  • Triode maximum plate voltage

    250 V

    TriodeSection

  • Heptode maximum plate voltage

    50 V

    HeptodeSection

  • Heptode maximum screen voltage

    50 V

    HeptodeSection

Data set 03

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Hexode

Other

  • Plate Current

    0.11 mA

    BatterySupply=6.3V

  • Screen Current

    0.08 mA

    BatterySupply=6.3V

  • Transconductance

    350 uS

    BatterySupply=6.3V

  • Plate Resistance

    600000 ohm

    BatterySupply=6.3V

  • Plate Current

    0.4 mA

    BatterySupply=12.6V

  • Screen Current

    0.25 mA

    BatterySupply=12.6V

  • Transconductance

    750 uS

    BatterySupply=12.6V

  • Plate Resistance

    850000 ohm

    BatterySupply=12.6V

  • Plate Current

    1.25 mA

    BatterySupply=25V

  • Screen Current

    0.85 mA

    BatterySupply=25V

  • Transconductance

    1500 uS

    BatterySupply=25V

  • Plate Resistance

    200000 ohm

    BatterySupply=25V

  • Maximum Plate Voltage

    30 V

  • Maximum Screen Voltage

    30 V

  • Maximum Cathode Current

    5 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

Characteristic

  • Plate Resistance

    200000 ohm

  • Transconductance

    1500 uS

SECTION 2

Triode

Other

  • Plate Voltage

    12.6 V

    BatteryService

  • Plate Current

    0.75 mA

    BatteryService

  • Transconductance

    1400 uS

    BatteryService

  • AF Voltage Gain

    8

    BatteryService

  • AF Output Voltage

    1.8 V

    BatteryService

  • Maximum Plate Voltage

    30 V

  • Maximum Cathode Current

    3 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

Characteristic

  • Transconductance

    1400 uS

Data set 04

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Hexode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    550 V

  • Maximum Screen Voltage

    250 V

  • Maximum Plate Dissipation

    0.8 W

  • Maximum Screen Dissipation

    0.5 W

  • Maximum Cathode Current

    20 mA

Characteristic

  • Transconductance

    1500 µS

    Typical

  • Plate Resistance

    500000 ohm

    Typical

SECTION 2

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    550 V

  • Maximum Plate Dissipation

    0.8 W

  • Maximum Cathode Current

    12 mA

Characteristic

  • Transconductance

    2200 µS

    Typical

  • Amplification Factor

    20

    Typical

  • Plate Resistance

    9000 ohm

    Typical

Data set 05

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

  • Anode voltage 25 12.6

    6.3 V

    Published datasheet value

  • Anode current 2 0.75

    0.3 mA

    Published datasheet value

  • Transconductance 2,2 1.4

    0.8 mA/V

    Published datasheet value

  • Grids No.2 and

    4 v

    Published datasheet value

  • Grids No.2 and 4 voltage 25 12.6

    6.3 V

    Published datasheet value

  • Conversion conductance 450 220

    90 w

    Published datasheet value

  • Anode voltage Va 25 12.6

    6.3 V

    Published datasheet value

  • Transconductance S 1.5 0.75

    0.35 mA/V

    Published datasheet value

  • Heater voltage Vg

    6.3 V

    Published datasheet value

  • Heater current I,

    300 mA

    Published datasheet value

Capacitance

  • Anode to all except grid Ca(g)

    2.1 pF

    Published datasheet value

  • Grid to all except anode Cg(a)

    2.6 pF

    Published datasheet value

  • Anode to grid Cag

    1 pF

    Published datasheet value

  • Anode to all Cy

    7.9 pF

    Published datasheet value

  • Grid No.1 to all Cgl

    4.8 pF

    Published datasheet value

  • Anode to grid No.1 Cagl max. §

    12 pF

    Published datasheet value

  • Grid No.3 to all Cg3

    6 pF

    Published datasheet value

  • Grid No.1 to grid No.3 Cg1g

    3 ma

    Published datasheet value

  • Grid No.1 to grid No.3 Cg1g3 max

    0.3 pF

    Published datasheet value

  • Anode heptode to anode triode CaHaT

    0.2 pF

    Published datasheet value

  • Anode heptode to grid triode CaHgT max

    0.09 pF

    Published datasheet value

  • Grid No.1 heptode to anode triode CngaT max

    0.06 pF

    Published datasheet value

  • Grid No. 1 heptode to grid triode CnggT max

    0.17 pF

    Published datasheet value

  • and grid No.3 Cng/ng

    3 ma

    Published datasheet value

  • and grid No.3 Cng/ng3 max

    0.45 pF

    Published datasheet value

  • and grid No.3 CaH/ng

    3 ma

    Published datasheet value

  • and grid No.3 CaH/ng3 max

    0.35 pF

    Published datasheet value

Other

  • Anode voltage Va 25 12.6

    6.3 V

    Published datasheet value

  • Anode current Ia 2 0.75

    0.3 mA

    Published datasheet value

  • Transconductance S 2.2 1.4

    0.8 mA/V

    Published datasheet value

  • Grids No.2 and

    4 v

    Published datasheet value

  • Grids No.2 and 4 voltage Vg2+4 25 12.6

    6.3 V

    Published datasheet value

  • Grid No

    1 v

    Published datasheet value

  • Oscillator voltage Vose 3.5 1.7

    1.1 V

    Published datasheet value

  • Grid No.3 current Igs 40 18

    7 µA

    Published datasheet value

  • Anode current Ia 550 170

    50 µA

    Published datasheet value

  • Grids No.2 and 4 current Ig2+4 1000 300

    80 µA

    Published datasheet value

  • Conversion conductance S¢ 450 220

    90 µA

    Published datasheet value

  • Published value

    100 pF

    Published datasheet value

  • Grids No.2, No.3 and No

    4 v

    Published datasheet value

  • Grids No.2, No.3 and No.4 voltage Vg2+3+4 25 12.6

    6.3 V

    Published datasheet value

  • Anode current I, 1.25 0.4

    0.11 mA

    Published datasheet value

  • Grids No.2, No.3 and 4 current Ig2+3+4 0.85 0.25

    0.08 mA

    Published datasheet value

  • Transconductance S 1.5 0.75

    0.35 mA/V

    Published datasheet value

  • Anode voltage Vao max

    550 V

    Published datasheet value

  • Va max

    250 V

    Published datasheet value

  • Anode dissipation W, max

    0.8 W

    Published datasheet value

  • Cathode current I max

    6.5 mA

    Published datasheet value

  • Cathode to heater voltage Vs max

    150 V

    Published datasheet value

  • D.C. component max

    100 V

    Published datasheet value

  • Va max

    50 V

    Published datasheet value

  • Grids No.2 and

    4 v

    Published datasheet value

  • Grids No.2 and 4 voltage Vg2+

    4 ma

    Published datasheet value

  • Grids No.2 and 4 voltage Vg2+4 max

    50 V

    Published datasheet value

  • Cathode current I max

    5 mA

    Published datasheet value

  • Grid No.3 resistor Rg

    3 ma

    Published datasheet value

  • Cathode to heater voltage Vi max

    150 V

    Published datasheet value