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Rectifier - Half Wave ·Rectifier

7018

Directly heated mercury-vapor/gas-filled high-current rectifier for industrial supplies. Its heavy filament and low arc voltage provide ampere-class output at higher inverse voltage.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4AU
Socket code
B9A
Base pins
4
Nominal heater
2.5 V / 7 A

Description

Mercury-vapor or gas-filled high-current rectifier for power-supply service. The supplied datasheet was reviewed for heater/filament data, maximum ratings, operating conditions, capacitances, pulse/RF data, and thermal limits.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
4AU
Socket code
B9A
Base pins
4
Nominal heater voltage
2.5 V
Nominal heater current
7 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4AU - 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 cathode current
2.5 A
Rectifier peak inverse voltage
2000 V
Rectifier nominal output current
2.5 A
Rectifier peak forward current
10 A
Rectifier forward voltage drop
12 V

Representative electrical section from supplied RCA data sheet.

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

1957 National Electronics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Maximum DC output current

    2.5 A

  • Maximum instantaneous output current

    10 A

  • Maximum peak inverse voltage

    2000 V

Characteristic

  • Filament heating time

    20 s

  • Typical arc drop

    12 V

  • Typical anode starting voltage

    13 V

Construction

  • Filling

    Mercury vapor

Application

  • Service

    Industrial power rectifier

Data set 02

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

  • Voltage (AC)

    2.5

    Published datasheet value

  • Current at 2.5 volts — published value 1

    2.5 A

    Published datasheet value

  • Current at 2.5 volts — published value 2

    7 A

    Published datasheet value

  • Current at 2.5 volts — published value 3

    1 A

    Published datasheet value

  • Peak Tube Voltage Drop at anode amperes = 8 — published value 1

    8 A

    Published datasheet value

  • Peak Tube Voltage Drop at anode amperes = 8 — published value 2

    12 A

    Published datasheet value

  • Pin 1-Filament — published value 1

    1

    Published datasheet value

  • Pin 1-Filament — published value 2

    4

    Published datasheet value

  • Pin 2 - Filament

    2

    Published datasheet value

  • Pin 3-Filament

    3

    Published datasheet value

  • Temperature (Approx.)

    30

    Published datasheet value

  • For yower-suyyly frequency of 6o cys

    6

    Published datasheet value

Other

  • Typical Anode Starting Voltage

    13

    Published datasheet value

  • PEAK INVERSE ANODE VOLTAGE

    2 A

    Published datasheet value

  • Peak

    10 mA

    Published datasheet value

  • Peak inverse anode voltage

    2000 V

    Published rectifier rating

  • Maximum average anode/DC output current

    2.5 A

    Published rectifier rating