U54

Marconi indirectly heated bi-phase full-wave rectifier for capacitor-input supplies, providing approximately 250 mA nominal output with substantial inverse-voltage capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: -
Nominal heater: 5 V / 2.8 A

Description

The Marconi U54 is a indirectly heated bi-phase rectifier for capacitor-input power supplies.

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: -
Nominal heater voltage: 5 V
Nominal heater current: 2.8 A
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

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1600 V
Rectifier nominal output current: 250 mA
Rectifier peak forward current: 1.5 A

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1600 V
Rectifier nominal output current: 250 mA
Rectifier peak forward current: 1.5 A

Second physical rectifier section; electrical properties populated from applicable published ratings.

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

Rectifier

Other

Heater/filament voltage
5 V
Heater/filament current
2.8 A
Peak inverse voltage
1600 V
Nominal/maximum output current
250 mA
Peak anode current
1.5 A

Construction

Rectifier topology
Bi-phase/full-wave

SECTION 2

Rectifier

Other

Heater/filament voltage
5 V
Heater/filament current
2.8 A
Peak inverse voltage
1600 V
Nominal/maximum output current
250 mA
Peak anode current
1.5 A

Construction

Rectifier topology
Bi-phase/full-wave