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Rectifier - Half Wave ·Rectifier

866A

Directly heated mercury-vapor high-voltage half-wave rectifier for transmitter and general power supplies. Its low arc voltage provides efficient moderate-current conversion at multi-kilovolt potentials.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
A4-10
Socket code
UX4
Base pins
4
Nominal heater
2.5 V / 5 A

Description

Directly heated mercury-vapor high-voltage half-wave rectifier for power-supply service.

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
A4-10
Socket code
UX4
Base pins
4
Nominal heater voltage
2.5 V
Nominal heater current
5 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

A4-10 - 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
10000 V
Rectifier nominal output current
500 mA
Rectifier peak forward current
2 A
Rectifier forward voltage drop
15 V
Rectifier warm-up time
30 s

Promoted values are taken from printed General Characteristics / Maximum Ratings. Additional published conditions and operating data are preserved in parameters.

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

1938 Raytheon Amateur

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Application

  • Application

    MercuryVaporHalfWaveRectifier text

Data set 02

1938 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • HeaterVoltageNominal

    2.5 V

    Nominal

  • HeaterCurrentNominal

    5 A

    Nominal

  • Maximum Peak Inverse Voltage

    10000 V

  • Rectified Output Current

    250 mA

  • PeakForwardCurrent

    1 A

Characteristic

  • Forward Voltage Drop

    10 V

Data set 03

1950 Eimac Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Filament Voltage

    2.5 V

  • Filament Current

    5 A

  • Approximate Tube Voltage Drop

    15 V

  • Recommended Condensed Mercury Temperature

    40 C

    ±5 C

  • Initial Mercury Redistribution Heating Time

    10 min

    No plate voltage

  • Normal Filament Warm-up Before Plate Voltage

    30 s

    Approximate

Other

  • Maximum Peak Inverse Anode Voltage

    10000 V

    At condensed-mercury temperature 25-60 C

  • Maximum Peak Anode Current

    1 A

  • Maximum Average Anode Current

    250 mA

  • Maximum Supply Frequency

    150 Hz

    At 10 kV PIV

  • Condensed Mercury Temperature Range

    25-60 C

  • PIV Rating at 2 kV Service

    2000 V

    Peak current 2 A; average current 0.5 A; 150 Hz max

  • PIV Rating at 5 kV Service

    5000 V

    Peak current 1 A; average current 0.25 A; 1000 Hz max

Application

  • Preferred Filter Type

    Choke input

    Greatest usable DC output current

  • Condenser-Input Filter Note

    Peak current relatively high; capacitor voltage may approach 1.4× transformer RMS voltage

Data set 04

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Forward Voltage Drop

    15 V

Data set 05

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Heater/Filament Voltage

    2.5 V

    Published datasheet value

  • Heater/Filament Current

    5 A

    Published datasheet value

  • Maximum Peak Inverse Voltage

    10000 V

    Published datasheet value

  • Maximum Average/Output Current

    500 mA

    Published datasheet value

Data set 06

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • HeaterOrFilamentVoltage

    2.5 V

  • HeaterOrFilamentCurrent

    5 A

  • WarmupTimeMinimum

    30 s

    Before anode voltage

Data set 07

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Condensed Mercury Temperature Range

    25 to 70 C

  • Supply Frequency Maximum

    150 Hz

    PIV=2000V

  • Supply Frequency Maximum

    1000 Hz

    PIV=5000V

  • Supply Frequency Maximum

    150 Hz

    PIV=10000V

Data set 08

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

  • Heater or filament voltage

    2.5 V

    Published nominal value

  • Heater or filament current

    5 A

    Published nominal value

  • Warm-up delay

    30 s

    Recommended before applying anode voltage

Data set 09

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

    5 A

  • Peak inverse anode voltage

    10000 V

  • Peak anode current

    1 A

  • Average anode current

    250 mA

  • Fault current

    20 A

    ShortDuration

Characteristic

  • Peak tube voltage drop

    15 V

    Conducting

Construction

  • Gas fill

    Mercury vapor