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Specialized - Thyratron ·Rectifier

KY21A

Eimac grid-controlled mercury-vapor rectifier for high-voltage supplies. Its control grid permits electronic switching of substantial rectified current, including use in paired full-wave circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.5 V / 10 A

Description

EITEL-McCULLOUGH, INC. Erour SA,NL?B;RUNO, CALIFORNIA RECTIFIER The Eimac KY2IA is a grid-controlled mercury vapor rectifier. A pair of KY21A's in a conventional single phase full wave circuit will supply a d-c power output of 5 kilowatts (3500 volts at 1.5 amperes) with a choke input filter. Voltage - - - - - - - - - 2.5 volts Current - - - - - - - - 10 amperes

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
2.5 V
Nominal heater current
10 A
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
11000 V
Rectifier nominal output current
750 mA
Rectifier peak forward current
3 A
Rectifier forward voltage drop
15 V
Rectifier warm-up time
30 s

Promoted fields populated only where the published value maps directly to the schema; device-specific 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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • KY2

    1

    KY21A's in a conventional single phase full wave circuit will supply a d-c power

  • output of [1]

    5 V

    output of 5 kilowatts (3500 volts at 1.5 amperes) with a choke input filter.

  • output of [2]

    3500 V

    output of 5 kilowatts (3500 volts at 1.5 amperes) with a choke input filter.

  • output of [3]

    1.5 V

    output of 5 kilowatts (3500 volts at 1.5 amperes) with a choke input filter.

  • Voltage

    2.5 V

    Voltage - - - - - - - - - 2.5 volts

  • Current

    10 A

    Current - - - - - - - - 10 amperes

  • Filament Heating Time (minimum)

    30 s

    Filament Heating Time (minimum) - - - - - 30 seconds

  • Peak Inverse Anode Voltage

    11000 V

    Peak Inverse Anode Voltage - - - - - 11,000 max. volts

  • Peak Anode Current

    3 A

    Peak Anode Current - - - - - - - 3 max. amperes

  • Average Anode Current

    75 A

    Average Anode Current - - - - - - .75 max. amperes

  • Supply Frequency

    150

    Supply Frequency - - - - - - - - - - - - 150 max. C.P.S.

  • Temperature Limits, Condensed Mercury [1]

    20

    Temperature Limits, Condensed Mercury - - - - - - - 20° to 60° Centigrade

  • Temperature Limits, Condensed Mercury [2]

    60

    Temperature Limits, Condensed Mercury - - - - - - - 20° to 60° Centigrade

  • should be held at the rated value of

    2.5 V

    should be held at the rated value of 2.5 volts. Variations in filament voltage must be kept within the range

  • of [1]

    2.4 V

    of 2.4 to 2.6 volts. The filament of the KY2IA should be allowed to reach operating temperature before

  • of [2]

    2.6 V

    of 2.4 to 2.6 volts. The filament of the KY2IA should be allowed to reach operating temperature before

  • the plate voltage is applied. Under normal conditions, a delay of approximately

    30 s

    the plate voltage is applied. Under normal conditions, a delay of approximately 30 seconds will be re-

  • When a KY2

    1

    When a KY21A is first installed, the filament should be operated at rated voltage for approximately

  • The ratio of d-c plate voltage to control voltage varies from about [1]

    87 V

    The ratio of d-c plate voltage to control voltage varies from about 87:1 at 1000 volts to 130:1 at 3500 volts.

  • The ratio of d-c plate voltage to control voltage varies from about [2]

    1 V

    The ratio of d-c plate voltage to control voltage varies from about 87:1 at 1000 volts to 130:1 at 3500 volts.

  • The ratio of d-c plate voltage to control voltage varies from about [3]

    1000 V

    The ratio of d-c plate voltage to control voltage varies from about 87:1 at 1000 volts to 130:1 at 3500 volts.

  • The ratio of d-c plate voltage to control voltage varies from about [4]

    130 V

    The ratio of d-c plate voltage to control voltage varies from about 87:1 at 1000 volts to 130:1 at 3500 volts.

  • The ratio of d-c plate voltage to control voltage varies from about [5]

    1 V

    The ratio of d-c plate voltage to control voltage varies from about 87:1 at 1000 volts to 130:1 at 3500 volts.

  • The ratio of d-c plate voltage to control voltage varies from about [6]

    3500 V

    The ratio of d-c plate voltage to control voltage varies from about 87:1 at 1000 volts to 130:1 at 3500 volts.

  • supply [1]

    100 V

    supply 100 to 150 volts of bias from a small pack. This grid voltage is satisfactory for all normal plate

  • supply [2]

    150 V

    supply 100 to 150 volts of bias from a small pack. This grid voltage is satisfactory for all normal plate

  • voltages. It will usually be advisable to protect the grid of the KY2

    1

    voltages. It will usually be advisable to protect the grid of the KY21A by means of a current limiting