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Tube Tinker — Electron Tube Database
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Power - Triode ·Triode

4A6G

Directly heated twin power triode designed for Class-B output service in battery-operated receivers, combining two triode sections in one envelope for economical push-pull audio power amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8L
Socket code
-
Base pins
8
Nominal heater
4 V / 80 mA

Description

Directly heated twin-triode Class-B power amplifier for the output stage of battery-operated receivers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8L
Socket code
-
Base pins
8
Nominal heater voltage
4 V
Nominal heater current
80 mA
Parallel heater voltage
2 V
Parallel heater current
120 mA
Series capable
No

8L - 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, with 1 unique section. The remaining sections have identical specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
28000 Ω
Transconductance
0.0009 S
Amplification factor
25
Max plate voltage
90 V

Representative repeated section; identical-section compression applied.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater or filament voltage

    4 V

    Published nominal value

  • Heater or filament current

    80 mA

    Published nominal value

  • Transconductance

    900 µS

    Published characteristic

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage Alternate

    2 V

    SeriesOrAlternateFilamentConnection

  • Heater Current Alternate

    120 mA

    SeriesOrAlternateFilamentConnection

Other

  • Plate Voltage

    90 V

    ClassA;EachUnit

  • Grid Voltage

    -1.5 V

    ClassA;EachUnit

  • Plate Current

    1.2 mA

    ClassA;EachUnit