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Power - Beam Single (NOT sweep) (under 10W) ·BeamPower

3D6

Directly heated beam-power amplifier designed for Class-A audio-output service in low-voltage battery-operated equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6BA
Socket code
B8G
Base pins
8
Nominal heater
2.8 V / 110 mA

Description

Directly heated beam-power amplifier for Class A audio output.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6BA
Socket code
B8G
Base pins
8
Nominal heater voltage
2.8 V
Nominal heater current
110 mA
Parallel heater voltage
1.4 V
Parallel heater current
220 mA
Series capable
Yes

6BA - 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

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.0024 S
Max plate voltage
180 V
Max screen voltage
135 V
Max plate dissipation
4.5 W
Max screen dissipation
0.9 W
Max cathode current
30 mA

Directly heated beam-power amplifier for Class A audio output.

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

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • HeaterOrFilamentVoltage

    1.4 V

  • HeaterOrFilamentCurrent

    220 mA

Other

  • Power Output

    0.5 W

    ParallelFilaments;PlateVoltage=135V

Data set 02

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Power output maximum published

    0.5 W

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    150 V

    ClassA;DirectFilament

  • Screen-grid voltage

    90 V

    ClassA;DirectFilament

  • Grid No.1 bias

    4.5 V

    ClassA;DirectFilament

  • Plate current

    9.8 mA

    ClassA;DirectFilament

  • Screen-grid current

    1 mA

    ClassA;DirectFilament

  • Transconductance

    2400 uS

    ClassA;DirectFilament

  • Load resistance

    14000 ohm

    ClassA;DirectFilament

  • Power output

    0.6 W

    ClassA;DirectFilament

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • MAX IMUM PLATE VOLTAGE 180

    180 VOLTS

    Published datasheet value

  • MAX IMUM CATHODE CURRENT 30

    30 MA

    Published datasheet value

  • PLATE VOLTAGE 90 135

    150 VOLTS

    Published datasheet value

  • ZERO~-SIGNAL PLATE CURRENT 9.5 9.8

    9.9 MA

    Published datasheet value

  • ZERO-S1GNAL GRID #2 CURRENT 1.6 1.2

    1 MA

    Published datasheet value

  • MAX IMUM S IGNAL PLATE CURRENT 8.5 9.8

    10.2 MA

    Published datasheet value

  • MAX IMUM SIGNAL GRID #2 CURRENT 3.2 2

    1.8 MA

    Published datasheet value

  • LOAD RESISTANCE 8 000 12 000 14

    0 OHMS

    Published datasheet value

  • POWER OUTPUT 270 500

    600 MW

    Published datasheet value

  • PLATE CURRENT

    23 MA

    Published datasheet value

  • GRID #2 CURRENT

    6 MA

    Published datasheet value

  • TOTAL DC CATHODE CURRENT {NOT TO EXCEED

    30 MA

    Published datasheet value

  • RF POWER INPUT

    0.25 WATT

    Published datasheet value

  • RF POWER OUTPUT

    1.4 WATTS

    Published datasheet value