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Specialized - Thyratron ·Thyratron

6D4

Argon-filled miniature thyratron designed for relay, control, and switching circuits, providing compact grid-triggered gas-discharge control.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
5AY
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 250 mA

Description

Argon-filled miniature thyratron for relay, control, and switching circuits. Data was extracted from the supplied Tung-Sol source, including published ratings, characteristics, and operating information.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5AY
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
250 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5AY - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA chart transcription; manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 5AY

PIN3H—H — Heater

EIA chart transcription; manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 5AY

PIN4H—H — Heater

EIA chart transcription; manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 5AY

PIN5KAK — Cathode

EIA chart transcription; manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 5AY

PIN7PAP — Plate (Anode)

EIA chart transcription; manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 5AY

Section ratings

1 physical section, each with unique specifications.

Section 1

Thyratron

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max cathode current
25 A

Gas triode / thyratron section used for relay control.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • Peak Plate Inverse Voltage

    350 V

  • Peak Plate Forward Voltage

    350 V

  • Peak Plate Current

    110 mA

  • Duty Cycle

    0.75 %

Characteristic

  • Tube Voltage Drop

    18 V

    Ib=100 mA

  • Noise Output

    10 V

    Peak-to-peak minimum

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristic

  • Tube voltage drop

    16 V

    At25mADC

  • DC current for stated voltage drop

    25 mA

    RelayControl

Other

  • Maximum DC cathode current

    25 mA

    RelayControl

  • Maximum peak cathode current

    100 mA

    RelayControl

  • Maximum voltage between elements

    450 V

    RelayControl

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Other

  • Grid Voltage

    1946 V

    Published operating/characteristic table

Data set 04

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Thyratron

Characteristics

  • 6.3t10~ VOLTS — published value 1

    10 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • 6.3t10~ VOLTS — published value 2

    0.25 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER VOLTAGE — published value 1

    6.3 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER VOLTAGE — published value 2

    10 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER CURRENT (E f = — published value 1

    6 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER CURRENT (E f = — published value 2

    0.25 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • ANODE TO CONTROL GRID CAPACITANCE

    7

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • CONTROL GRID TO CATHODE CAPACITANCE

    1.2

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • ANODE TO CATHODE CAPACITANCE

    1

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • HEATER TO CATHODE CAPACITANCE

    2.9

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • ANODE VOLTAGE DROP (AT 100 MA dc) (APPRO%.) — published value 1

    100 MA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • ANODE VOLTAGE DROP (AT 100 MA dc) (APPRO%.) — published value 2

    12 MA

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • AND R=}3~OOp OHM) (P TO P)(MIN,) — published value 1

    3 OHM

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • AND R=}3~OOp OHM) (P TO P)(MIN,) — published value 2

    9 OHM

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • FORWARD

    3 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • INVERSE

    350 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • DC PLATE SUPPLY VOLTAGE

    5 VOLTS

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • NEGATIVE CONTROL GRID VOLTAGE

    150

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • NEATER CATHODE VOLTAGE

    110

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • AMBIENT TEMPERATURE — published value 1

    -55

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • AMBIENT TEMPERATURE — published value 2

    9

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • CONTROL GRID CIRCUIT RESISTANCE

    5 MEGOHM

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.

  • Ef = 6.3 Volts

    6.3 Volts

    OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.