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Rectifier - Half Wave ·Rectifier

A214

Marconi oil-insulated high-voltage rectifier specifically designed for X-ray apparatus and radiographic supplies, with approximately 125 kV peak inverse-voltage capability.

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

Description

The A214 is an oil-insulated high-voltage rectifier designed for X-ray apparatus, with continuous and intermittent radiographic service ratings.

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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
125000 V
Rectifier nominal output current
50 mA

Published maximum ratings and characteristics audited; remaining useful numerical data retained in TUBE_SECTION_PARAMETER.

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

  • i Manual filament switching

    300

    i Manual filament switching 300 mA

  • ii Automatic filament boost

    500

    ii Automatic filament boost 500 mA

  • Load Current Ratings. The load rating values for the I

    5 A

    Load Current Ratings. The load rating values for the I-5"

  • The Filament Voltage Adjustment Chart is based on have a dielectric strength of at least

    25000 V

    The Filament Voltage Adjustment Chart is based on have a dielectric strength of at least 25,000 volts per

  • Continuous DC output current

    50 mA

    Full-wave bridge without condenser.

  • Peak inverse voltage

    125000 V

    Maximum rating.

  • Intermittent current - manual filament switching

    300 mA

    Usual radiographic exposure times.

  • Intermittent current - automatic filament boost

    500 mA

    Usual radiographic exposure times.