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Tube Tinker — Electron Tube Database
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Voltage - Dual Triode (similar high frequency) ·Triode-Triode

6L12

High-frequency twin triode intended for VHF tuner or amplifier service, with paired sections optimized for receiver front-end operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
-
Nominal heater
6.3 V / 435 mA

Description

Dual triode for RF amplification and self-oscillating mixer service in FM receivers.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
435 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9700 Ω
Transconductance
0.006 S
Amplification factor
58
Max plate voltage
300 V
Max plate dissipation
2.5 W
Max cathode current
15 mA

Representative promoted row for identical repeated sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9700 Ω
Transconductance
0.006 S
Amplification factor
58
Max plate voltage
300 V
Max plate dissipation
2.5 W
Max cathode current
15 mA

Second physical triode section; electrically identical twin section.

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

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    435 mA

    Nominal

  • Maximum Plate Voltage

    300 V

  • Maximum Plate Dissipation

    2.5 W

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    6000 µS

    Typical

  • Amplification Factor

    58

    Typical

  • Plate Resistance

    9700 ohm

    Typical