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233B

Directly heated water-cooled half-wave rectifier for high-voltage AC-to-DC conversion. Its massive filament and liquid cooling support substantial industrial and communications power-supply service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: -
Nominal heater: 21.5 V / 41 A

Description

Half-wave high-voltage water-cooled rectifier for supplying direct current from an alternating-current source.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: UX4
Base pins: -
Nominal heater voltage: 21.5 V
Nominal heater current: 41 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: 50000 V
Rectifier peak forward current: 5 A

Promoted fields mapped from published ratings/characteristics; additional published values preserved in parameter table.

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

2026 Western Electric 200s

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Filament voltage. .. ...t
21.5 volt
Filament voltage. .. ...t 21.5 volts, a.c.
Noniinal filament current
41 amperes
Noniinal filament current.......................... 41 amperes
Average thermionic emission................cceeuan
7 amperes
Average thermionic emission................cceeuan 7 amperes
to a value of approximately
90 amperes
to a value of approximately 90 amperes. This may be done by inserting additional resistance or
Figure
2 volt
Figure 2 shows the impedance characteristic and the effect of lowering the filament voltage

Other

Maximum peak inverse voltage
50000 volt
Maximum peak inverse voltage. ................... 50,000 volts
Maximum peak platecurrent
5 amperes
Maximum peak platecurrent...................... 5 amperes
The maximum permissible peak plate current (
5 amperes
The maximum permissible peak plate current (5 amperes) is a limitation on the instantaneous
The maximum permissible peak inverse voltage (
50000 volt
The maximum permissible peak inverse voltage (50,000 volts) is a limitation on the instanta-