Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Rectifier - Half Wave ·Rectifier

214E

Directly heated two-element thermionic rectifier for substantial DC power systems. Its heavy filament supports industrial half-wave AC-to-DC conversion at hundreds of volts.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
JUMBO4B
Base pins
-
Nominal heater
10 V / 3.25 A

Description

Two-element thermionic rectifier for systems supplying direct-current voltages up to 750 volts.

Socket description

Super Jumbo 4-pin bayonet

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
JUMBO4B
Base pins
-
Nominal heater voltage
10 V
Nominal heater current
3.25 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 plate voltage
750 V

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

  • Normal filament current

    3.25 amperes

    Normal filament current 3.25 ± 0.15 amperes

  • Normal fi l a m e n t voltage

    10 volt

    Normal fi l a m e n t voltage 10 volts

  • This is a two element tube used in rectifying systems to supply B.C. voltages up to

    750 volt

    This is a two element tube used in rectifying systems to supply B.C. voltages up to 750

  • Two tubes used for rectifying a single phase A.C. supply voltage will give

    150 volt

    Two tubes used for rectifying a single phase A.C. supply voltage will give .150 ampere

  • B.C. plate output at

    750 volts

    B.C. plate output at 750 volts.

  • the desired output and should not exceed

    10 volts

    the desired output and should not exceed 10 volts.

  • for from

    10 volt

    for from 10 to 30 minutes. No voltage should be applied to the plate during this reactivation.