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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6BA5

Miniature sharp-cutoff pentode for receiving and general electronic small-signal applications.

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

Description

Miniature pentode intended for receiving and electronic applications.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
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

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
175000 Ω
Transconductance
0.00215 S
Max plate voltage
300 V
Max screen voltage
150 V

Sharp-cutoff pentode.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage . . 6.3 Volts

    6.3 V

    Heater Voltage . . 6.3 Volts

  • Heater Current . . 150 Ma

    150 mA

    Heater Current . . 150 Ma

  • Plate Voltage 100 Volts

    100 V

    Plate Voltage 100 Volts

  • Screen Voltage . . 100 Volts

    100 V

    Screen Voltage . . 100 Volts

  • Plate Current 5.9 Ma

    5.9 mA

    Plate Current 5.9 Ma

  • Screen Current. 2 Ma

    2 mA

    Screen Current. 2 Ma

  • Plate Resistance (approx. ) 175,000 Ohms

    175 Ohms

    Plate Resistance (approx. ) 175,000 Ohms

  • Control Grid Bias Voltage for I,,—10 p.a -13.5 Volts

    -13.5 V

    Control Grid Bias Voltage for I,,—10 p.a -13.5 Volts

Other

  • Screen Voltage . . 140 Volts Max.

    140 V

    Screen Voltage . . 140 Volts Max.

  • Plate Dissipation . . 0.7 Watt Max.

    0.7 W

    Plate Dissipation . . 0.7 Watt Max.

  • Heater-Cathode Voltage . 90 Volts Max.

    90 V

    Heater-Cathode Voltage . 90 Volts Max.

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    100 V

    ClassA

  • Screen-grid voltage

    100 V

    ClassA

  • Cathode resistor

    270 ohm

    ClassA

  • Plate current

    5.5 mA

    ClassA

  • Screen-grid current

    2 mA

    ClassA