LS2

Double triode intended for special-purpose amplifier service, providing two triode sections for specialized electronic amplification where its published characteristics are appropriate.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 1.9 V / 225 mA

Description

Double triode for special-purpose amplifier service.

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: 1.9 V
Nominal heater current: 225 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

Amplification factor: 17
Max plate voltage: 250 V
Max plate dissipation: 2.5 W
Max grid dissipation: 0.2 W
Max cathode current: 25 mA

Published ratings and characteristics promoted from the approved datasheet. Telefunken LS2 directly heated 1.9 V, 225 mA dual transmitting/output triode. First physical section of two, intended for push-pull transmitter or AF output service. Maximum plate voltage 250 V, plate dissipation 2.5 W and grid dissipation 0.2 W per section. Published maximum cathode current 25 mA per section applies to limited service life of about 50 hours; for normal life use no more than 10 mA per section. Interelectrode capacitances documented.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Amplification factor: 17
Max plate voltage: 250 V
Max plate dissipation: 2.5 W
Max grid dissipation: 0.2 W
Max cathode current: 25 mA

Second physical triode restored under current one-row-per-physical-section policy. Telefunken LS2 directly heated 1.9 V, 225 mA dual transmitting/output triode. Second physical section of two, intended for push-pull transmitter or AF output service. Maximum plate voltage 250 V, plate dissipation 2.5 W and grid dissipation 0.2 W per section. Published maximum cathode current 25 mA per section applies to limited service life of about 50 hours; for normal life use no more than 10 mA per section. Interelectrode capacitances documented.

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.

No source-specific operating conditions are recorded.