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

Rectifier - Half Wave ·Rectifier

2X2A

Rugged high-vacuum half-wave rectifier for high-voltage equipment exposed to shock and vibration, providing approximately 25 kV peak inverse-voltage capability at low current.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4AB
Socket code
UX4
Base pins
4
Nominal heater
2.5 V / 1.75 A

Description

The 2X2A is an indirectly heated high-vacuum half-wave rectifier for high-voltage applications where shock and vibration are encountered. Published ratings include 25 kV peak inverse voltage and 7.5 mA maximum rectified current.

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
4AB
Socket code
UX4
Base pins
4
Nominal heater voltage
2.5 V
Nominal heater current
1.75 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4AB - 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
25000 V
Rectifier nominal output current
7.5 mA
Rectifier peak forward current
60 mA

Half-wave vacuum rectifier.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • DC output current maximum

    7.5 mA

    HalfWave

  • Peak inverse voltage maximum

    12500 V

    HalfWave

  • RMS supply voltage maximum

    5500 V

    HalfWave

  • Peak current maximum

    60 mA

    HalfWave

Data set 02

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Maximum Peak Inverse Voltage

    12500 V

  • Maximum Peak Plate Current

    60 mA

  • Maximum DC Output Current

    7.5 mA

Data set 03

1963 Ferranti

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Application

  • Application

    High-voltage half-wave rectifier

Other

  • Peak inverse voltage maximum

    25000 V

  • Peak anode current maximum

    60 mA

  • Rectified current maximum

    7.5 mA

  • Hot-switching transient current maximum

    100 mA

    Pulse

  • Maximum ambient temperature

    70 C

  • RMS input voltage

    5500 V

    CapacitorInputFilter

  • Minimum supply impedance

    300000 ohm

    CapacitorInputFilter

  • Filter input capacitance

    0.1 uF

    CapacitorInputFilter

  • Rectified current

    2 mA

    CapacitorInputFilter

  • DC output voltage

    4500 V

    CapacitorInputFilter

  • Hot-switching transient duration maximum

    200 ms

    Pulse

Data set 04

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Heater/filament voltage

    2.5 V

  • Heater/filament current

    1.75 A

  • Peak inverse voltage

    10000 V

  • Peak plate current

    75 mA

  • Average plate current

    7.5 mA

Application

  • Application

    High-voltage half-wave rectifier