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Rectifier - Full Wave ·Rectifier-Rectifier

7Y4

Loctal full-wave high-vacuum rectifier electrically comparable to the 6X5 family. Its 6.3 V heater-cathode construction provides conventional moderate-current receiver power-supply service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
5AB
Socket code
B8G
Base pins
8
Nominal heater
6.3 V / 500 mA

Description

Full-wave rectifier, GT-equivalent to 6X5GT.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5AB
Socket code
B8G
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
500 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5AB - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
1250 V
Rectifier nominal output current
70 mA
Rectifier peak forward current
210 mA
Rectifier forward voltage drop
22 V
Rectifier max heater-cathode voltage
450 V

Published promoted fields populated by semantic section ownership; identical repeated sections compressed.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
1250 V
Rectifier nominal output current
70 mA
Rectifier peak forward current
210 mA
Rectifier forward voltage drop
22 V
Rectifier max heater-cathode voltage
450 V

Second physical rectifier section; electrical properties populated from corresponding identical section.

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

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • RMS Input per Anode

    325 V

    CapacitorInputFilter

  • Rectified Current

    60 mA

    CapacitorInputFilter

  • Peak Current per Anode

    180 mA

  • Heater-Cathode Potential

    450 V

  • Supply Impedance per Anode

    150 ohm

    CapacitorInputFilter

  • Reservoir Capacitor

    32 uF

    CapacitorInputFilter

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • RMS plate voltage capacitor-input maximum

    325 V

    CapacitorInputFilter

  • RMS plate voltage choke-input maximum

    450 V

    ChokeInputFilter

Data set 03

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Application

  • Application

    Full-wave rectifier

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Maximum RMS supply voltage per plate

    325 V

    Full-Wave High-Vacuum

Characteristic

  • Forward voltage drop

    22 V

    Full-Wave High-Vacuum

Data set 05

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Peak Inverse Voltage

    1250 V

  • Peak Anode Current

    200 mA

  • RMS Input Voltage per Anode

    450 V

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • ACPlateVoltageRMS

    325 V

    CapacitorInputFilter

  • ACPlateVoltageRMS

    450 V

    ChokeInputFilter

  • DC Output Current

    70 mA