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Power - Triode (over 1000V 100W) ·Triode

3Q331E

Water-cooled very-high-power RF triode for amplifier and oscillator service in large transmitting installations.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
27.5 V / 600 A

Description

Water-cooled very-high-power RF amplifier/oscillator triode.

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
27.5 V
Nominal heater current
600 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
Plate resistance
750 Ω
Amplification factor
46
Max plate voltage
17500 V
Max plate dissipation
160000 W

Values transcribed from the approved datasheet; additional published 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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Grid to anode

    98 pF

    Published direct interelectrode capacitance

  • Grid to filament

    145 pF

    Published direct interelectrode capacitance

  • Anode to filament

    7 pF

    Published direct interelectrode capacitance

  • Heater/filament nominal current

    600 A

    Nominal published value