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Rectifier - Half Wave ·Rectifier

1018

Directly heated Philips gas-filled rectifier intended for charging applications. It provides approximately 200 mA average output capability with a characteristic valve voltage drop around 15 V.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.8 V / 1.8 A

Description

1018 — Gas-Filled Rectifier Valve

The 1018 is a gas-filled rectifier valve designed specifically for charging purposes. It features a directly heated filament and is rated for low-voltage, moderate-current rectification.

Filament and Heating Specifications

The 1018 utilizes a directly heated cathode configuration. The electrical requirements for the filament are:

  • Filament Voltage: 1.8 V
  • Filament Current: Approximately 1.8 A
  • Calculated Filament Power: 3.24 W

The filament power is calculated directly from the nominal filament voltage of 1.8 V and the approximate filament current of 1.8 A (1.8 V * 1.8 A = 3.24 W).

Anode Ratings and Operating Limits

The anode circuit of the 1018 is rated for low-voltage AC inputs and moderate DC output currents. The maximum operating limits are:

  • Maximum AC No-Load Voltage: 16 V R.M.S.
  • Maximum DC Current: 200 mA

These ratings define the safe operating envelope of the valve. The maximum AC input voltage must not exceed 16 V R.M.S. under no-load conditions, and the rectified DC current drawn through the anode must not exceed 200 mA.

Construction and Application

The 1018 is classified as a gas-filled valve, distinguishing it from high-vacuum rectifiers. Its primary designated application is as a rectifier for charging purposes.

The physical specifications, including maximum dimensions and base connection references, are not specified in the standard product listings, indicating a specialized design or non-standard physical configuration.

Technical Summary

The 1018 is a directly heated, gas-filled rectifier valve designed for charging applications. It operates with a 1.8 V, 1.8 A filament (3.24 W calculated power) and supports a maximum AC no-load voltage of 16 V R.M.S. with a maximum DC current of 200 mA.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
1.8 V
Nominal heater current
1.8 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 nominal output current
200 mA
Rectifier forward voltage drop
15 V

Directly heated gas-filled rectifier for charging purposes; Philips notes an approximately 15 V valve drop.

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 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Maximum AC no-load voltage per plate

    16 V

    HalfWave

  • Maximum DC output current

    200 mA

    HalfWave

Characteristic

  • Valve voltage drop

    15 V

    GasFilled