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Triode - HV Shunt Regulator ·Triode

6EL4A

High-voltage beam triode for shunt regulation of low-current television power supplies.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
8GC
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 200 mA

Description

Glass octal beam triode used for voltage regulation of high-voltage, low-current DC power supplies in color and black-and-white television receivers.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8GC
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8GC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1KAK — Cathode

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN2H—H — Heater

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN3IC—IC

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN4IC—IC

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN5G1AG1 — Control Grid

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN6IC—IC

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN7H—H — Heater

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

PIN8IC—IC

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

CAP1PAP — Plate (Anode)

Source transcription; manufacturer verification pending

Unverified

EIA Base Connections, printed page 130, 8GC

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0002 S
Max plate voltage
27000 V
Max plate dissipation
40 W
Max cathode current
1.6 mA

High-voltage beam triode shunt-regulator section; absolute maximum DC plate current 1.5 mA preserved as parameter.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • DC Plate Current

    1.5 mA

    AbsoluteMaximum

  • Regulated DC Output Voltage

    25000 V

    ZeroLoad

  • Regulated DC Output Voltage

    24500 V

    LoadCurrent=1mA

  • X-radiation Maximum

    0.5 mR/hr

Characteristic

  • Effective Grid-Plate Transconductance

    200 uS

    ShuntRegulator

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid to Plate

    0.03 pF

    Capacitance

  • Grid to Cathode and Heater

    2.6 pF

    Capacitance

  • Plate to Cathode and Heater

    1 pF

    Capacitance

Other

  • Unregulated DC Supply Voltage Maximum

    60000 V

    ShuntRegulator

  • DC Grid Voltage

    -136 V

    ShuntRegulator

  • Average Plate Current

    1.6 mA

    ShuntRegulator

  • Unregulated DC Supply Voltage

    36000 V

    ShuntRegulator

  • DC Reference Voltage Supply

    200 V

    ShuntRegulator

  • Regulated DC Output Voltage at 0 mA load

    25000 V

    ShuntRegulator

  • Regulated DC Output Voltage at 1 mA load

    24500 V

    ShuntRegulator

Characteristic

  • X-Radiation Maximum

    0.5 mR/hr

    XRay