3X3000F1

Eimac low-mu forced-air-cooled power triode for audio amplifier and modulator service. With about 3 kW plate dissipation and 6 kV capability, a pair can deliver approximately 10 kW maximum-signal audio output without grid current.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 51 A

Description

The Eimac 3X3000F1 is a low-mu forced-air-cooled power triode intended for audio amplifier or modulator service; a pair can deliver up to 10 kW maximum-signal plate output at 6000 plate volts without grid current.

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: 7.5 V
Nominal heater current: 51 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: 0.011 S
Amplification factor: 5
Max plate voltage: 6000 V
Max plate dissipation: 3000 W
Max grid dissipation: 50 W
Max cathode current: 2.5 A

Highest applicable published rating promoted; service-specific CW, RF, audio, industrial, and pulse limits retained as parameter rows.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum DC Plate Current
2.5 A
Class-AB maximum
Typical Maximum-Signal Plate Output Power
10000 W
Class-AB, two tubes, 6000 V plate

Capacitance

Grid-Plate Capacitance
17 pF
Average
Grid-Filament Capacitance
29 pF
Average
Plate-Filament Capacitance
2.5 pF
Average

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Grid-Plate Capacitance
17 pF
Grid-Filament Capacitance
29 pF
Plate-Filament Capacitance
2.5 pF
Transconductance
0.011 A/V
Frequency Maximum
30 MHz
Typical Two-Tube AF Output Power
10000 W