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Rectifier - Half Wave ·Rectifier

A209

Marconi oil-insulated high-voltage rectifier specifically designed for X-ray apparatus and radiographic service, providing approximately 140 kV peak inverse-voltage capability.

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

Description

The A209 is an oil-insulated high-voltage rectifier designed for X-ray apparatus, with continuous and intermittent radiographic current 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
140000 V
Rectifier nominal output current
100 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

  • to a great extent by the operating temperature of the Installation. The A

    209

    to a great extent by the operating temperature of the Installation. The A 209 rectifier may be operated in any

  • The importance of setting the filament voltage in [1]

    0 V

    The importance of setting the filament voltage in 0-1 in. and must be free from dirt and moisture.

  • The importance of setting the filament voltage in [2]

    -1 V

    The importance of setting the filament voltage in 0-1 in. and must be free from dirt and moisture.

  • Continuous DC output current

    100 mA

    Full-wave bridge without condenser.

  • Continuous peak inverse voltage

    140000 V

    Continuous-duty maximum.

  • Intermittent DC output current

    500 mA

    Usual radiographic exposure times.

  • Intermittent peak inverse voltage

    125000 V

    Usual radiographic exposure times.