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Rectifier - Half Wave ·Rectifier

EY91

Indirectly heated miniature half-wave rectifier for compact electronic equipment. Its 6.3 V heater and moderate output capability suit small power supplies.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
-
Nominal heater
6.3 V / 420 mA

Description

Indirectly heated miniature half-wave rectifier for miniature equipment.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
420 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 peak inverse voltage
700 V
Rectifier nominal output current
75 mA
Rectifier max heater-cathode voltage
300 V
Rectifier warm-up time
20 s

Published source values promoted where applicable; additional values retained as 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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Reservoir capacitance maximum

    32 uF

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    420 mA

Other

  • RMSInputVoltageMaximum

    250 V

  • ReservoirCapacitanceMaximum

    32 uF

  • LimitingResistance

    100 ohm

    RMSInput=250V;C=32uF

  • LimitingResistance

    50 ohm

    RMSInput=250V;C=16uF

  • LimitingResistance

    0 ohm

    RMSInput=250V;C=8uF

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Published electrical datum

    6.3 V

    Chauffagze: indirect par C.A. Ve = 6,3V

  • Published electrical datum

    420 mA

    alimentation-parallble Ie = 0,42 A

Other

  • Published electrical datum

    250 Veff

    Vi = max. 250 Veff

  • Published electrical datum

    715 mA

    Io = max., 715 mA

  • Published electrical datum

    300 V

    Vit = max., 300 V

  • Heater voltage

    6.3 V

    Nominal heater rating

  • Heater current

    420 mA

    Nominal heater rating