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Power - Triode ·Triode

L12

Midget output triode designed for deaf-aid and headphone amplifiers, providing audio power from low-voltage portable supplies.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

Midget output triode for deaf-aid and headphone amplifiers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
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

Triode

X-ray radiationInterelectrode capacitances
Amplification factor
48
Max plate voltage
40 V

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum/Published Anode Voltage

    40 V

  • Typical Anode Voltage

    45 V

  • Typical Anode Current

    2.2 mA

  • Power Output

    12 mW

Characteristic

  • Amplification Factor

    48

  • Optimum Load

    10000 ohm

Capacitance

  • Grid-Anode Capacitance

    4 pF

  • Grid-Cathode Capacitance

    2 pF

  • Anode-Cathode Capacitance

    1.6 pF