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Voltage Pentode - Remote Cutoff (single) ·Pentode

EF93

Indirectly heated variable-slope pentode for gain-controlled RF and IF amplification with high plate resistance.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
B7G
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 300 mA

Description

Indirectly heated variable-slope pentode intended for RF or IF amplification.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

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

B7G - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1450000 Ω
Transconductance
0.0044 S
Max plate voltage
250 V
Max screen voltage
125 V
Max plate dissipation
3 W
Max screen dissipation
0.6 W
Max cathode current
18 mA

Published ratings/characteristics promoted from source tables.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Input capacitance

    5.5 pF

  • Output capacitance

    5 pF

Characteristic

  • Anode current

    11 mA

    Va=250V; Vg2=100V

  • Screen current

    4.2 mA

    Va=250V; Vg2=100V

Data set 02

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Tension filAMent ….…cceurecrearssoceresnancomssncacececacecocess VÉ

    6.3 V

  • Heater current ...s seessencensereneseress IË

    300 mA

  • TenSion d'ANOËE….………rrevereeesereirr vovrorcamreranséssencecsce0ees VE

    300 V

  • sésmsoce sucocacsensssa 00000s VB

    125 V

  • Screen-grid voltage à courant nu1 asssssos0c0s000u VGa DI

    300 V

  • Dissipation d'Anod@ …..….….vsesereersocserensencrmcecesescuess PA

    3 W

  • Screen-grid dissipation ... ercrcrenenseceensensensennee PB2

    0.6 W

  • VAÏlEur NÉGatiVE ….…mesenente socmerrsensenren sessancoencees “ VEL

    50 V

  • valeur positive …… maerseersesesssscasseeuseees V1

    0 V

  • Tension entre filament et cathode oevsusecessceseercnes VIR

    90 V

  • Tension d'ANOËE ….……ueerseceemsenesecssosecenrensersenceseseense |VOL

    100250 V

  • Screen-grid voltage ……usescenemssicsssencosusesrsossseccurss V 2R

    100 V

  • RÉSISTANCE INtEINE .…uerercercencereerensessersnrencenceaeneen P 0,25

    1.5 MΩ

  • PEntE Lrecrirenceseensecasesnsecesmsumemess sasassesssensencenseencansesss 1D 4,3

    4.4 mA/V

  • pour une pente de 40 jA/ V . covsosssosrseseesencanceuse VB DL

    -20 V

  • Courant d'Anod@E ...……..…ccesreeveeee sorrsnseceseenseseecnsesences TO 10,8

    11 mA

  • Courant de grille n° 2 ….………uceesecsesreesecacemcescoscercessss 182 4,4

    4.2 mA

Characteristic

  • Capacitance d'entrée …… … Ce

    5.5 pF

    InterelectrodeCapacitance

  • Capacitance de sortie .… avssesnensesscamsencasasasecermaenceusss OS

    5 pF

    InterelectrodeCapacitance

  • Capacitance grille n° 1/anode vouene cacvse vocacarassensvencn es CE1/@

    3.5 pF

    InterelectrodeCapacitance

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • For fixed-bias operation

    0.25 MΩ

    Published in approved EF93 target datasheet entry; Section1

  • For cathode-bias operation

    1 MΩ

    Published in approved EF93 target datasheet entry; Section1

  • Plate Current

    5 mA

    Published in approved EF93 target datasheet entry; Section1

  • Plate Voltage

    330 V

    Published in approved EF93 target datasheet entry; Section1

  • Grid-No.3 (Suppressor-Grid) Voltage, Positive value

    0 V

    Published in approved EF93 target datasheet entry; Section1

  • Grid-No.2 Supply Voltage

    330 V

    Published in approved EF93 target datasheet entry; Section1

  • Plate Dissipation

    3.4 W

    Published in approved EF93 target datasheet entry; Section1

  • For grid-No.2 voltages up to

    165 V

    Published in approved EF93 target datasheet entry; Section1

  • For grid-No.2 voltages up to 165 volts

    0.7 W

    Published in approved EF93 target datasheet entry; Section1

  • For grid-No.2 voltages between 165 and

    330 V

    Published in approved EF93 target datasheet entry; Section1

  • Negative-bias value

    55 V

    Published in approved EF93 target datasheet entry; Section1

  • Positive-bias value

    0 V

    Published in approved EF93 target datasheet entry; Section1

  • Plate Supply Voltage 100

    250 V

    Published in approved EF93 target datasheet entry; Section1

  • voltage of approximately

    50 V

    Published in approved EF93 target datasheet entry; Section1

Characteristic

  • Tube Voltage Drop for plate current of

    20 mA

    Published in approved EF93 target datasheet entry; Section1

  • Tube Voltage Drop for plate current of 20 mA

    5 V

    Published in approved EF93 target datasheet entry; Section1

  • Grid-No.2 Supply Voltage 100

    100 V

    Published in approved EF93 target datasheet entry; Section1

  • Cathode-Bias Resistor 68

    68 Ω

    Published in approved EF93 target datasheet entry; Section1

  • Plate Resistance (Approx.) 0.25

    1 MΩ

    Published in approved EF93 target datasheet entry; Section1

  • Transconductance 4300

    4400 µS

    Published in approved EF93 target datasheet entry; Section1

  • Plate Current 10.8

    11 mA

    Published in approved EF93 target datasheet entry; Section1

  • Grid-No.2 Current 4.4

    4.2 mA

    Published in approved EF93 target datasheet entry; Section1

  • of 40 jimhos

    -20 V

    Published in approved EF93 target datasheet entry; Section1

Capacitance

  • Heater Voltage (ac/dc) 6.3

    6.3 V

    Published in approved EF93 target datasheet entry; Section1

  • Heater Current 0.3

    300 mA

    Published in approved EF93 target datasheet entry; Section1

  • " This value is

    5.5 pF

    Published in approved EF93 target datasheet entry; Section1