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Rectifier - Half Wave ·Rectifier

HG25

Directly heated mercury-vapor half-wave rectifier for high-current, high-voltage supplies. Its gas-assisted conduction provides moderate current at multi-kilovolt voltage with low arc drop.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.5 V / 5 A

Description

Directly heated mercury-vapour rectifier for high-current high-voltage power supplies.

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
2.5 V
Nominal heater current
5 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

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
10000 V
Rectifier nominal output current
250 mA
Rectifier peak forward current
10 A
Rectifier warm-up time
30 s

Published Ferranti ratings and characteristics promoted where applicable; additional electrical, pulse, regulator, microwave, and operating data retained as parameters.

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

1963 Ferranti

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Construction

  • Mercury-vapour rectifier

    Yes

Other

  • Peak inverse voltage maximum natural ventilation

    10 kV

  • Peak anode current maximum

    10 A

  • Average anode current maximum

    250 mA

  • Cathode heating delay minimum

    30 s

  • Supply frequency

    50 Hz

    ChokeInputFilter

  • DC output - bi-phase half-wave 2 valves

    3.2 kV at 0.5 A

    TwoTubes

  • DC output - 3-phase half-wave 3 valves

    4.5 kV at 0.75 A

  • DC output - single-phase full-wave 4 valves

    6.5 kV at 0.5 A

  • DC output - 3-phase full-wave 6 valves

    9.5 kV at 0.75 A

  • DC output - 3-phase half-wave double-Y 6 valves

    4.5 kV at 1.5 A