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Rectifier - Half Wave ·Rectifier

U107

Half-wave rectifier for electronic power-supply service, with manufacturer documentation defining its voltage, current, and intended operating conditions.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
-
Nominal heater
4 V / 100 mA

Description

The Marconi U107 is a half-wave indirectly heated rectifier for capacitor-input power supplies.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
-
Nominal heater voltage
4 V
Nominal heater current
100 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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
700 V
Rectifier nominal output current
90 mA
Rectifier peak forward current
540 mA
Rectifier max heater-cathode voltage
350 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

Rectifier

Other

  • Heater/filament voltage

    4 V

  • Heater/filament current

    100 mA

  • Peak inverse voltage

    700 V

  • Nominal/maximum output current

    90 mA

  • Peak anode current

    540 mA

  • Maximum heater-cathode voltage

    350 V

  • Surge anode current

    1.8 A

Construction

  • Rectifier topology

    Half-wave