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Specialized - Thyratron ·Triode

NL716

Compact quick-heating gas-and-mercury thyratron for timing and control applications, designed for wide-temperature operation and long service life without circuit cushioning.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
A4-10
Socket code
UX4
Base pins
4
Nominal heater
2.5 V / 6.3 A

Description

NATIONAL POWER TUBE NL-716 is a compact, quick heating thyratron designed for timing and control applications. It is gas and mercury filled for quick starting and wide temperature limits. NL-716 gives long life without circuit cushioning. NATIONAL ELECTRONICS, INC. GENEVA, ILLINOIS, U. S. A. NL-716 THYRATRON TUBE TECHNICAL INFORMATION do Amperes output (maximum) 1.0 Instantaneous Amperes output (maximum) 8.0 Maximum time of averaging anode current (seconds

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
A4-10
Socket code
UX4
Base pins
4
Nominal heater voltage
2.5 V
Nominal heater current
6.3 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

A4-10 - 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

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
1250 V
Max cathode current
1 A
Rectifier peak inverse voltage
1250 V
Rectifier nominal output current
1 A
Rectifier peak forward current
8 A
Rectifier warm-up time
8 s

Published ratings and characteristics promoted where canonical fields apply.

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

1956 National Electronics Industrial Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • 1.0 Ampere do

    8.0 Amperes Peak A

    Source technical-information table; wording preserved from datasheet.

  • do Amperes output (maximum)

    1 A

    Source technical-information table; wording preserved from datasheet.

  • Instantaneous Amperes output (maximum)

    8 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum time of averaging anode current (seconds)

    5 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum peak inverse volts

    1250 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum peak forward volts

    1250 V

    Source technical-information table; wording preserved from datasheet.

  • Filament volts

    2.5 V

    Source technical-information table; wording preserved from datasheet.

  • Filament amperes

    6.3 + 0.8 A

    Source technical-information table; wording preserved from datasheet.

  • Filament heating time (seconds)

    — 15 s

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative grid voltage before conduction (volts)

    500 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum negative grid voltage during conduction (volts)

    10 V

    Source technical-information table; wording preserved from datasheet.

  • Maximum critical grid current (microamperes)

    10 A

    Source technical-information table; wording preserved from datasheet.

  • Maximum ac short circuit current (amperes)

    80 A

    Source technical-information table; wording preserved from datasheet.

  • Condensed mercury temperature limits (°C) `

    —40 to +80 C

    Source technical-information table; wording preserved from datasheet.

  • Approximate temperature rise, cond. mercury above ambient (°C)

    30 C

    Source technical-information table; wording preserved from datasheet.

  • Net weight (ounces)

    3 oz

    Source technical-information table; wording preserved from datasheet.

  • Approx. shipping weight (lbs.l

    3 lb

    Source technical-information table; wording preserved from datasheet.

  • *The tube may be started and satisfactory operation will result between —40 and

    +80°C. For maximum life the condensed

    Source technical-information table; wording preserved from datasheet.

  • mercury temperature after warm-up should run between

    +40 and +80°C which corresponds to approximately +10 and C

    Source technical-information table; wording preserved from datasheet.

  • BASE A4-10

    W 600

    Source technical-information table; wording preserved from datasheet.

  • ANODE

    GRID | 200

    Source technical-information table; wording preserved from datasheet.

  • Yri ntril

    In USA -1U -3 3 | --O, P..

    Source technical-information table; wording preserved from datasheet.

Characteristic

  • Typical arc drop at 5 amperes peak (volts)

    8 V

    Source technical-information table; wording preserved from datasheet.

  • Ionization time (approx., microseconds)

    10 us

    Source technical-information table; wording preserved from datasheet.

  • Deionization time (approx., microseconds)

    1000 us

    Source technical-information table; wording preserved from datasheet.

  • Anode to grid capacitance (uuf)

    3 pF

    Source technical-information table; wording preserved from datasheet.

Data set 02

1957 National Electronics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum peak forward voltage

    -

  • Maximum peak output current

    8 A

  • Maximum dc output current

    1 A