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Power - Pentode (NOT beam) ·Pentode

1L5G

Directly heated power-amplifier pentode for conventional battery-operated receiver output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
IO
Base pins
7
Nominal heater
2 V / 240 mA

Description

Power amplifier pentode.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
7
Nominal heater voltage
2 V
Nominal heater current
240 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Max plate voltage
180 V
Max screen voltage
180 V

Promoted values from 1L5G.pdf; section type follows printed electrode/function description.

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

1946 Amalgamated Wireless

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater or filament voltage

    2 V

    Published nominal rating

  • Grid-to-plate capacitance

    1 pF

    Direct interelectrode capacitance

  • Input capacitance

    8 pF

    Direct interelectrode capacitance

  • Output capacitance

    12 pF

    Direct interelectrode capacitance