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Power - Triode ·Triode

7328A

Low-mu directly heated power triode for Class-AB audio-frequency amplifier and modulator service, with a 20-kW plate-dissipation rating.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
7 V / 245 A

Description

Low-mu directly heated power triode for modulator and AF-amplifier Class-AB service, with forced-air-cooled anode.

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
7 V
Nominal heater current
245 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
Amplification factor
6
Max plate dissipation
20000 W
Max cathode current
80 A

Published ratings and characteristics promoted where clearly applicable; additional source values retained as section 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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater or filament voltage

    7 V

    Published nominal/representative value

  • Heater or filament current

    245 A

    Published nominal/representative value

  • Amplification factor

    6

    Published

Other

  • Maximum plate dissipation

    20000 W

    Published

  • Maximum plate current

    10 A

    Published

  • Maximum plate input

    50 kW

    Published

  • Maximum usable cathode current

    80 A

    Published