228A

Water-cooled transmitting power triode intended for high-power RF operation. Western Electric catalog data specify kilowatt-class output and plate dissipation with several-kilovolt plate operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: MEDIUM4BAYONET
Base pins: -
Nominal heater: 21.5 V / 41 A

Description

The Western Electric 228A is a triode listed in the supplied catalog table. It is a water-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: 0.0065 S
Amplification factor: 17
Max plate voltage: 6000 V
Max plate dissipation: 5000 W

Published maximum ratings and general characteristics promoted; direct interelectrode capacitances are published.

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
1100 W
Catalog-table value

Other

Maximum Plate Voltage
6000 V
Catalog-table value
Maximum Plate Dissipation
5000 W
Catalog-table value