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AH205

Hot-cathode mercury-vapor half-wave rectifier, also designated 857B/CV2673, for high-voltage power conversion with approximately 10 A average output capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5 V / 30 A

Description

Hot-cathode mercury-vapour rectifier AH205/857B, service type CV2673, rated to 22 kV peak inverse voltage and 40 A peak current.

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: 30 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: 22000 V
Rectifier nominal output current: 10 A
Rectifier peak forward current: 40 A
Rectifier forward voltage drop: 15 V
Rectifier warm-up time: 120 s

Mercury-vapor rectifier; highest explicit rectifier ratings promoted.

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

Filament voltage
5 V
Filament current
30 A
Peak inverse voltage
22000 V
Peak anode current
40 A
Average anode current
10 A
Minimum pre-heating time
120 s
Maximum DC output voltage
10.5 kV
3PhaseHalfWave
Maximum DC output current
30 A
3PhaseHalfWave
Maximum DC output voltage
21 kV
3PhaseFullWave
Maximum DC output current
30 A
3PhaseFullWave

Characteristic

Forward arc voltage drop
15 V

Construction

Filling
Mercury vapor
Cooling
Air blast / source-specified thermal control