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Power - Triode ·Triode

389AA

Forced-air-cooled water-filament high-power transmitting triode designed for Class C radio-frequency power service in substantial transmitter equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
11 V / 150 A

Description

Forced-air-cooled water-filament high-power transmitting triode for Class C RF service.

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
11 V
Nominal heater current
150 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
0.016 S
Amplification factor
22
Max plate voltage
8500 V
Max plate dissipation
7500 W

Published ratings and characteristics promoted from the supplied Western Electric source.

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

Characteristic

  • HeaterOrFilamentVoltage

    11 V

  • HeaterOrFilamentCurrent

    150 A

Other

  • Typical Plate Voltage

    5000 V

    ClassC;Unmodulated

  • Typical Plate Current

    1.5 A

    ClassC;Unmodulated

  • Power Output

    13500 W

    ClassC;Unmodulated