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Power - Tetrode (NOT beam) ·Tetrode

282A

Air-cooled transmitting tetrode designed for Class-B RF service. Its construction and operating ratings support radio-frequency power amplification in transmitter equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
J4
Base pins
4
Nominal heater
10 V / 3 A

Description

Air-cooled transmitting tetrode for Class B RF service.

Socket description

Jumbo 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
J4
Base pins
4
Nominal heater voltage
10 V
Nominal heater current
3 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

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
70000 Ω
Transconductance
0.00143 S
Amplification factor
100
Max plate voltage
1000 V
Max screen voltage
250 V
Max plate dissipation
70 W
Max screen dissipation
5 W
Max cathode current
100 mA

Published ratings and characteristics promoted from the approved datasheet.

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

1933 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate-filament capacitance

    6.8 pF

    Published direct interelectrode capacitance

  • Grid-filament capacitance

    12.2 pF

    Published direct interelectrode capacitance

Data set 02

1956 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

  • HeaterOrFilamentVoltage

    10 V

  • HeaterOrFilamentCurrent

    3 A

Other

  • Typical Plate Voltage

    1000 V

    ClassB;RF

  • Typical Power Output

    33 W

    ClassB;RF

Data set 03

2026 Western Electric 200s

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

  • PlateToControlGridCapacitance

    0.2 pF

  • PlateToFilamentScreenGridCapacitance

    6.8 pF

  • ControlGridToFilamentScreenGridCapacitance

    12.2 pF