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Voltage Pentode - Remote Cutoff (single) ·Pentode

3BA6

Controlled-warm-up remote-cutoff RF/IF pentode equivalent to 6BA6. It combines variable-gain receiver amplification with heater characteristics designed for series-string equipment requiring coordinated warm-up behavior.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7CC
Socket code
B7G
Base pins
7
Nominal heater
3.15 V / 600 mA

Description

3BA6 is described in the supplied Tung-Sol datasheet as a controlled-warm-up remote-cutoff RF/IF pentode equivalent to 6BA6. Published electrical ratings and operating characteristics were extracted from the supplied source.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7CC
Socket code
B7G
Base pins
7
Nominal heater voltage
3.15 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7CC - 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
1000000 Ω
Transconductance
0.0044 S
Max plate voltage
300 V
Max screen voltage
220 V
Max plate dissipation
3 W
Max screen dissipation
0.6 W
Max cathode current
18 mA
Rectifier warm-up time
11 s

Published ratings/characteristics promoted where semantically applicable; supplemental values retained in parameter table.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen-grid voltage

    100 V

    ClassA

  • Grid No.1 bias

    Rk=68 V

    ClassA

  • Plate current

    11 mA

    ClassA

  • Plate resistance

    1000000 ohm

    ClassA

  • Transconductance

    4400 uS

    ClassA

  • Plate voltage

    100 V

    ClassA;LowVoltage

  • Screen-grid voltage

    100 V

    ClassA;LowVoltage

  • Grid No.1 bias

    Rk=68 V

    ClassA;LowVoltage

  • Plate current

    10.8 mA

    ClassA;LowVoltage

  • Screen-grid current

    4.4 mA

    ClassA;LowVoltage

  • Plate resistance

    250000 ohm

    ClassA;LowVoltage

  • Transconductance

    4300 uS

    ClassA;LowVoltage

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate Resistance

    1 Mohm

    TypicalOperatingPoint

  • Transconductance

    4400 uS

    TypicalOperatingPoint

Data set 03

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    3.15 V

  • Heater Current

    600 mA

  • ControlledWarmupHeater

    1 boolean

  • Heater Warmup Time

    11 s

  • Plate Voltage

    250 V

  • Screen Voltage

    100 V

  • Grid Voltage

    -1 V

  • Plate Current

    10.8 mA

  • Screen Current

    4.2 mA

  • Transconductance

    4400 uS

  • Plate Resistance

    1000000 ohm

  • GridToPlateCapacitanceMaximum

    0.0035 pF

  • Input Capacitance

    5.5 pF

  • Output Capacitance

    5 pF

  • GridVoltageForGmReduction

    -14 V

    RemoteCutoff

  • CutoffCharacteristic

    Remote cutoff

Data set 04

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater voltage

    3.15 V

    Published heater rating

  • Heater current

    600 mA

    Published heater rating

  • Transconductance

    4400 µS

    RForIFAmplifier

Capacitance

  • Grid-to-plate capacitance

    0.0035 pF

    Published

  • Input capacitance

    5.5 pF

    Published

  • Output capacitance

    5.5 pF

    Published

Other

  • Plate voltage

    250 V

    RForIFAmplifier

  • Screen voltage

    100 V

    RForIFAmplifier

  • Plate current

    11 mA

    RForIFAmplifier

Data set 05

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Screen Supply Voltage

    300 V

  • Plate Voltage

    100 V

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Screen Voltage

    100 V

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Cathode Bias Resistance

    68 ohm

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Plate Voltage

    250 V

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

  • Screen Voltage

    100 V

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

  • Cathode Bias Resistance

    68 ohm

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

  • Heater Warmup Time

    11 s

Characteristic

  • Plate Resistance

    250000 ohm

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Transconductance

    4300 uS

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Plate Current

    10.8 mA

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Screen Current

    4.4 mA

    ClassA; PlateVoltage=100V; ScreenVoltage=100V

  • Plate Resistance

    1000000 ohm

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

  • Transconductance

    4400 uS

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

  • Plate Current

    11 mA

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

  • Screen Current

    4.2 mA

    ClassA; PlateVoltage=250V; ScreenVoltage=100V

Capacitance

  • Grid1ToPlateCapacitanceMaximum

    0.0035 pF

    WithExternalShield

  • Input Capacitance

    5.5 pF

    WithExternalShield

  • Output Capacitance

    5.5 pF

    WithExternalShield

Data set 06

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Current — published value 1

    0

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Current — published value 2

    600

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Current — published value 3

    0.04

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (AC or Ix) at heater — published value 1

    0

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (AC or Ix) at heater — published value 2

    0

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (ac or dc) at 0.600 A — published value 1

    0 V

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (ac or dc) at 0.600 A — published value 2

    0.6 V

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (ac or dc) at 0.600 A — published value 3

    3.15 V

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Warm-up Time (Average)

    11

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (ac or dc) at 0.450 A — published value 1

    0 V

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (ac or dc) at 0.450 A — published value 2

    0.45 V

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.

  • Voltage (ac or dc) at 0.450 A — published value 3

    3 V

    Published datasheet value; multiple numbers on a row represent separate source limits or conditions.