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Rectifier - Half Wave ·Rectifier

CY31

Indirectly heated half-wave power rectifier for AC/DC mains equipment. Its 20 V, 200 mA heater supports approximately 250 V RMS anode input and 120 mA maximum rectified current.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
IO
Base pins
-
Nominal heater
20 V / 200 mA

Description

Half-wave power rectifier with a 20 V, 200 mA heater, 250 V rms maximum anode voltage, 120 mA maximum rectified current and reservoir-capacitor series-resistance recommendations.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
-
Nominal heater voltage
20 V
Nominal heater current
200 mA
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
120 mA
Rectifier max heater-cathode voltage
350 V
Rectifier warm-up time
70 s

Half-wave 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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • RMS Input

    250 V

    Maximum

  • Reservoir Capacitance

    8 uF

    SeriesResistance=0ohm

  • Reservoir Capacitance

    16 uF

    SeriesResistance=75ohm

  • Reservoir Capacitance

    32 uF

    SeriesResistance=125ohm

Characteristics

  • Heating Time

    70 s

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Anode voltage maximum RMS

    250 V

  • Rectified current maximum

    120 mA

  • Heater-cathode voltage maximum peak

    350 V

  • Heating time

    70 s

  • Minimum series resistance

    0 ohm

    Reservoir capacitance=8 uF

  • Minimum series resistance

    75 ohm

    Reservoir capacitance=16 uF

  • Minimum series resistance

    125 ohm

    Reservoir capacitance=32 uF