3Q33IE

High-power RF triode for amplifier and oscillator service in transmitting equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 27.5 V / 600 A

Description

Water-cooled triode intended for high-power radio-frequency amplifier and oscillator service, with published maximum ratings and typical Class B/Class C operating conditions.

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
Max grid dissipation: 3000 W

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 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

GridToAnodeCapacitance
98 pF
Grid To Filament Capacitance
145 pF
AnodeToFilamentCapacitance
7 pF
PeakEmission
100 A

Other

MaximumDirectAnodeCurrent
16 A