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G205D

Mercury-vapor half-wave rectifier for high-voltage industrial power conversion, using low arc voltage to provide efficient current handling in substantial DC supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5 V / 20 A

Description

Directly heated mercury-vapour hot-cathode rectifier.

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: 5 V
Nominal heater current: 20 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

Max cathode current: 2.5 A
Rectifier peak inverse voltage: 20000 V
Rectifier nominal output current: 2.5 A
Rectifier peak forward current: 10 A
Rectifier forward voltage drop: 15 V
Rectifier warm-up time: 60 s

Mercury-vapour rectifier; average anode current used as nominal output current.

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

1953 AEG

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Filament voltage
5 V
Filament current
20 A
Peak inverse voltage
20 kV
Peak anode current
10 A
Average anode current
2.5 A
Ignition voltage maximum
30 V
Warm-up time
60 sec

Characteristic

Arc voltage drop
15 V