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Power - Triode ·Triode

220CA

Forced-air-cooled high-power transmitting triode for RF service. Published data specify forced-air anode cooling, multi-kilowatt plate dissipation, and operation into the low-megahertz range for industrial transmitting applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
MEDIUM4BAYONET
Base pins
-
Nominal heater
21.5 V / 41 A

Description

The Western Electric 220CA is a triode listed in the supplied catalog table. It is a forced-air-cooled transmitting type intended for high-power RF service.

Socket description

Medium 4-contact bayonet base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
MEDIUM4BAYONET
Base pins
-
Nominal heater voltage
21.5 V
Nominal heater current
41 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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.005 S
Amplification factor
40
Max plate dissipation
5000 W
Max cathode current
2.5 A

Promoted fields populated from explicitly published ratings/characteristics; service-specific data 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

1956 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Maximum/Typical Power Output

    2200 W

    Catalog-table value

Other

  • Maximum Plate Dissipation

    5000 W

    Catalog-table value

Data set 02

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Filament Starting Current

    82 A

  • Available Thermionic Emission

    7 A

  • Grid-Plate Capacitance

    23.5 pF

  • Grid-Filament Capacitance

    17.5 pF

  • Plate-Filament Capacitance

    1.6 pF

  • RF Frequency Full Rating Maximum

    4 MHz

  • Required Anode Airflow

    600 cfm

Data set 03

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • FilamentStartingCurrent

    82 A

  • Peak Cathode Current

    7 A

  • AnodeCoolingMethod

    Forced Air

  • MaximumOperatingFrequency

    4 MHz

  • Maximum Anode Dissipation

    5000 W

    Absolute maximum / applicable service

Capacitance

  • GridPlateCapacitance

    23.5 pF

  • GridFilamentCapacitance

    17.5 pF

Data set 04

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • the ML

    220

    the ML-220CA is forced-air cooled and is capable of dis- exhausted by a straight-line, high-voltage process assuring the

  • peres apply at frequencics up to [1]

    4 MHz

    peres apply at frequencics up to 4 Mc; operation at 12 Mc is and super-voltage x-ray tubces,

  • peres apply at frequencics up to [2]

    12 MHz

    peres apply at frequencics up to 4 Mc; operation at 12 Mc is and super-voltage x-ray tubces,

  • permissible with plate voltage reduced to

    5

    permissible with plate voltage reduced to 5 kVde

  • Filament Current at

    215 V

    Filament Current at 21,5 volts e a1 amperes